Merge pull request #1399 from github/cut-3.1.0-release

Cut 3.1.0 release

.travis.yml

@@ -1,12 +1,11 @@
 before_install: 
+  - git fetch origin master:master
+  - git fetch origin v2.0.0:v2.0.0
   - sudo apt-get install libicu-dev -y
   - gem update --system 2.1.11
 rvm:
-  - 1.8.7
-  - 1.9.2
   - 1.9.3
   - 2.0.0
   - 2.1.1
-  - ree
 notifications:
   disabled: true

Gemfile

@@ -1,7 +1,2 @@
 source 'https://rubygems.org'
 gemspec
-
-if RUBY_VERSION < "1.9.3"
-  # escape_utils 1.0.0 requires 1.9.3 and above
-  gem "escape_utils", "0.3.2"
-end

README.md

@@ -106,8 +106,50 @@ To update the `samples.json` after adding new files to [`samples/`](https://gith
 
     bundle exec rake samples
 
+### A note on language extensions
+
+Linguist has a number of methods available to it for identifying the language of a particular file. The initial lookup is based upon the extension of the file, possible file extensions are defined in an array called `extensions`. Take a look at this example for example for `Perl`:
+
+```
+Perl:
+  type: programming
+  ace_mode: perl
+  color: "#0298c3"
+  extensions:
+  - .pl
+  - .PL
+  - .perl
+  - .ph
+  - .plx
+  - .pm
+  - .pod
+  - .psgi
+  interpreters:
+  - perl
+```
+Any of the extensions defined are valid but the first in this array should be the most popular.
+
 ### Testing
 
 Sometimes getting the tests running can be too much work, especially if you don't have much Ruby experience. It's okay: be lazy and let our build bot [Travis](http://travis-ci.org/#!/github/linguist) run the tests for you. Just open a pull request and the bot will start cranking away.
 
 Here's our current build status, which is hopefully green: [![Build Status](https://secure.travis-ci.org/github/linguist.png?branch=master)](http://travis-ci.org/github/linguist)
+
+### Releasing
+
+If you are the current maintainer of this gem:
+
+ 0. Create a branch for the release: `git checkout -b cut-release-vxx.xx.xx`
+ 0. Make sure your local dependencies are up to date: `bundle install`
+ 0. Ensure that samples are updated: `bundle exec rake samples`
+ 0. Ensure that tests are green: `bundle exec rake test`
+ 0. Bump gem version in `lib/linguist/version.rb`.  For example, [like this](https://github.com/github/linguist/commit/8d2ea90a5ba3b2fe6e1508b7155aa4632eea2985).
+ 0. Make a PR to github/linguist.  For example, [#1238](https://github.com/github/linguist/pull/1238).
+ 0. Build a local gem: `gem build github-linguist.gemspec`
+ 0. Testing:
+   0. Bump the Gemfile and Gemfile.lock versions for an app which relies on this gem
+   0. Install the new gem locally
+   0. Test behavior locally, branch deploy, whatever needs to happen
+ 0. Merge github/linguist PR
+ 0. Tag and push: `git tag vx.xx.xx; git push --tags`
+ 0. Push to rubygems.org -- `gem push github-linguist-3.0.0.gem`

bin/linguist

@@ -5,6 +5,7 @@
 
 require 'linguist/file_blob'
 require 'linguist/repository'
+require 'rugged'
 
 path = ARGV[0] || Dir.pwd
 
@@ -18,7 +19,8 @@ ARGV.shift
 breakdown = true if ARGV[0] == "--breakdown"
 
 if File.directory?(path)
-  repo = Linguist::Repository.from_directory(path)
+  rugged = Rugged::Repository.new(path)
+  repo = Linguist::Repository.new(rugged, rugged.head.target_id)
   repo.languages.sort_by { |_, size| size }.reverse.each do |language, size|
     percentage = ((size / repo.size.to_f) * 100)
     percentage = sprintf '%.2f' % percentage

github-linguist.gemspec

@@ -1,6 +1,8 @@
+require File.expand_path('../lib/linguist/version', __FILE__)
+
 Gem::Specification.new do |s|
   s.name    = 'github-linguist'
-  s.version = '2.10.13'
+  s.version = Linguist::VERSION
   s.summary = "GitHub Language detection"
   s.description = 'We use this library at GitHub to detect blob languages, highlight code, ignore binary files, suppress generated files in diffs, and generate language breakdown graphs.'
 
@@ -11,10 +13,11 @@ Gem::Specification.new do |s|
   s.files = Dir['lib/**/*']
   s.executables << 'linguist'
 
-  s.add_dependency 'charlock_holmes', '~> 0.6.6'
-  s.add_dependency 'escape_utils',    '>= 0.3.1'
+  s.add_dependency 'charlock_holmes', '~> 0.7.3'
+  s.add_dependency 'escape_utils',    '~> 1.0.1'
   s.add_dependency 'mime-types',      '~> 1.19'
-  s.add_dependency 'pygments.rb',     '~> 0.5.4'
+  s.add_dependency 'pygments.rb',     '~> 0.6.0'
+  s.add_dependency 'rugged',          '~> 0.21.0'
 
   s.add_development_dependency 'json'
   s.add_development_dependency 'mocha'

lib/linguist.rb

@@ -4,3 +4,4 @@ require 'linguist/heuristics'
 require 'linguist/language'
 require 'linguist/repository'
 require 'linguist/samples'
+require 'linguist/version'

lib/linguist/blob_helper.rb

@@ -1,5 +1,4 @@
 require 'linguist/generated'
-require 'linguist/language'
 
 require 'charlock_holmes'
 require 'escape_utils'
@@ -112,6 +111,12 @@ module Linguist
       end
     end
 
+    def ruby_encoding
+      if hash = detect_encoding
+        hash[:ruby_encoding]
+      end
+    end
+
     # Try to guess the encoding
     #
     # Returns: a Hash, with :encoding, :confidence, :type
@@ -241,7 +246,31 @@ module Linguist
     def lines
       @lines ||=
         if viewable? && data
-          data.split(/\r\n|\r|\n/, -1)
+          # `data` is usually encoded as ASCII-8BIT even when the content has
+          # been detected as a different encoding. However, we are not allowed
+          # to change the encoding of `data` because we've made the implicit
+          # guarantee that each entry in `lines` is encoded the same way as
+          # `data`.
+          #
+          # Instead, we re-encode each possible newline sequence as the
+          # detected encoding, then force them back to the encoding of `data`
+          # (usually a binary encoding like ASCII-8BIT). This means that the
+          # byte sequence will match how newlines are likely encoded in the
+          # file, but we don't have to change the encoding of `data` as far as
+          # Ruby is concerned. This allows us to correctly parse out each line
+          # without changing the encoding of `data`, and
+          # also--importantly--without having to duplicate many (potentially
+          # large) strings.
+          begin
+            encoded_newlines = ["\r\n", "\r", "\n"].
+              map { |nl| nl.encode(ruby_encoding, "ASCII-8BIT").force_encoding(data.encoding) }
+
+            data.split(Regexp.union(encoded_newlines), -1)
+          rescue Encoding::ConverterNotFoundError
+            # The data is not splittable in the detected encoding.  Assume it's
+            # one big line.
+            [data]
+          end
         else
           []
         end
@@ -283,15 +312,7 @@ module Linguist
     #
     # Returns a Language or nil if none is detected
     def language
-      return @language if defined? @language
-
-      if defined?(@data) && @data.is_a?(String)
-        data = @data
-      else
-        data = lambda { (binary_mime_type? || binary?) ? "" : self.data }
-      end
-
-      @language = Language.detect(name.to_s, data, mode)
+      @language ||= Language.detect(self)
     end
 
     # Internal: Get the lexer of the blob.

lib/linguist/file_blob.rb

@@ -52,5 +52,20 @@ module Linguist
     def size
       File.size(@path)
     end
+
+    # Public: Get file extension.
+    #
+    # Returns a String.
+    def extension
+      # File.extname returns nil if the filename is an extension.
+      extension = File.extname(name)
+      basename = File.basename(name)
+      # Checks if the filename is an extension.
+      if extension.empty? && basename[0] == "."
+        basename
+      else
+        extension
+      end
+    end
   end
 end

lib/linguist/generated.rb

@@ -54,7 +54,7 @@ module Linguist
       name == 'Gemfile.lock' ||
         minified_files? ||
         compiled_coffeescript? ||
-        xcode_project_file? ||
+        xcode_file? ||
         generated_parser? ||
         generated_net_docfile? ||
         generated_net_designer_file? ||
@@ -63,17 +63,18 @@ module Linguist
         generated_jni_header? ||
         composer_lock? ||
         node_modules? ||
-        vcr_cassette?
+        vcr_cassette? ||
+        generated_by_zephir?
     end
 
-    # Internal: Is the blob an XCode project file?
+    # Internal: Is the blob an Xcode file?
     #
-    # Generated if the file extension is an XCode project
+    # Generated if the file extension is an Xcode 
     # file extension.
     #
     # Returns true of false.
-    def xcode_project_file?
-      ['.xib', '.nib', '.storyboard', '.pbxproj', '.xcworkspacedata', '.xcuserstate'].include?(extname)
+    def xcode_file?
+      ['.nib', '.xcworkspacedata', '.xcuserstate'].include?(extname)
     end
 
     # Internal: Is the blob minified files?
@@ -237,6 +238,13 @@ module Linguist
       !!name.match(/composer.lock/)
     end
 
+    # Internal: Is the blob a generated by Zephir
+    #
+    # Returns true or false.
+    def generated_by_zephir?
+      !!name.match(/.\.zep\.(?:c|h|php)$/)
+    end
+
     # Is the blob a VCR Cassette file?
     #
     # Returns true or false
@@ -248,3 +256,4 @@ module Linguist
     end
   end
 end
+

lib/linguist/language.rb

@@ -9,6 +9,8 @@ end
 require 'linguist/classifier'
 require 'linguist/heuristics'
 require 'linguist/samples'
+require 'linguist/file_blob'
+require 'linguist/blob_helper'
 
 module Linguist
   # Language names that are recognizable by GitHub. Defined languages
@@ -24,7 +26,6 @@ module Linguist
     @extension_index          = Hash.new { |h,k| h[k] = [] }
     @interpreter_index        = Hash.new { |h,k| h[k] = [] }
     @filename_index           = Hash.new { |h,k| h[k] = [] }
-    @primary_extension_index  = {}
 
     # Valid Languages types
     TYPES = [:data, :markup, :programming, :prose]
@@ -80,12 +81,6 @@ module Linguist
         @extension_index[extension] << language
       end
 
-      if @primary_extension_index.key?(language.primary_extension)
-        raise ArgumentError, "Duplicate primary extension: #{language.primary_extension}"
-      end
-
-      @primary_extension_index[language.primary_extension] = language
-
       language.interpreters.each do |interpreter|
         @interpreter_index[interpreter] << language
       end
@@ -99,18 +94,25 @@ module Linguist
 
     # Public: Detects the Language of the blob.
     #
-    # name - String filename
-    # data - String blob data. A block also maybe passed in for lazy
-    #        loading. This behavior is deprecated and you should always
-    #        pass in a String.
-    # mode - Optional String mode (defaults to nil)
+    # blob - an object that includes the Linguist `BlobHelper` interface;
+    #       see Linguist::LazyBlob and Linguist::FileBlob for examples
     #
     # Returns Language or nil.
-    def self.detect(name, data, mode = nil)
+    def self.detect(blob)
+      name = blob.name.to_s
+
+      # Check if the blob is possibly binary and bail early; this is a cheap
+      # test that uses the extension name to guess a binary binary mime type.
+      #
+      # We'll perform a more comprehensive test later which actually involves
+      # looking for binary characters in the blob
+      return nil if blob.likely_binary? || blob.binary?
+
       # A bit of an elegant hack. If the file is executable but extensionless,
       # append a "magic" extension so it can be classified with other
       # languages that have shebang scripts.
-      if File.extname(name).empty? && mode && (mode.to_i(8) & 05) == 05
+      extension = FileBlob.new(name).extension
+      if extension.empty? && blob.mode && (blob.mode.to_i(8) & 05) == 05
         name += ".script!"
       end
 
@@ -121,10 +123,10 @@ module Linguist
       # extension at all, in the case of extensionless scripts), we need to continue
       # our detection work
       if possible_languages.length > 1
-        data = data.call() if data.respond_to?(:call)
+        data = blob.data
         possible_language_names = possible_languages.map(&:name)
 
-        # Don't bother with emptiness
+        # Don't bother with binary contents or an empty file
         if data.nil? || data == ""
           nil
         # Check if there's a shebang line and use that as authoritative
@@ -190,9 +192,9 @@ module Linguist
     #
     # Returns all matching Languages or [] if none were found.
     def self.find_by_filename(filename)
-      basename, extname = File.basename(filename), File.extname(filename)
-      langs = [@primary_extension_index[extname]] +
-              @filename_index[basename] +
+      basename = File.basename(filename)
+      extname = FileBlob.new(filename).extension
+      langs = @filename_index[basename] +
               @extension_index[extname]
       langs.compact.uniq
     end
@@ -299,15 +301,6 @@ module Linguist
       @interpreters = attributes[:interpreters]   || []
       @filenames  = attributes[:filenames]  || []
 
-      unless @primary_extension = attributes[:primary_extension]
-        raise ArgumentError, "#{@name} is missing primary extension"
-      end
-
-      # Prepend primary extension unless its already included
-      if primary_extension && !extensions.include?(primary_extension)
-        @extensions = [primary_extension] + extensions
-      end
-
       # Set popular, and searchable flags
       @popular    = attributes.key?(:popular)    ? attributes[:popular]    : false
       @searchable = attributes.key?(:searchable) ? attributes[:searchable] : true
@@ -395,20 +388,6 @@ module Linguist
     # Returns the extensions Array
     attr_reader :extensions
 
-    # Deprecated: Get primary extension
-    #
-    # Defaults to the first extension but can be overridden
-    # in the languages.yml.
-    #
-    # The primary extension can not be nil. Tests should verify this.
-    #
-    # This attribute is only used by app/helpers/gists_helper.rb for
-    # creating the language dropdown. It really should be using `name`
-    # instead. Would like to drop primary extension.
-    #
-    # Returns the extension String.
-    attr_reader :primary_extension
-
     # Public: Get interpreters
     #
     # Examples
@@ -426,12 +405,28 @@ module Linguist
     #
     # Returns the extensions Array
     attr_reader :filenames
-    
+
     # Public: Return all possible extensions for language
     def all_extensions
       (extensions + [primary_extension]).uniq
     end
 
+    # Deprecated: Get primary extension
+    #
+    # Defaults to the first extension but can be overridden
+    # in the languages.yml.
+    #
+    # The primary extension can not be nil. Tests should verify this.
+    #
+    # This method is only used by app/helpers/gists_helper.rb for creating
+    # the language dropdown. It really should be using `name` instead.
+    # Would like to drop primary extension.
+    #
+    # Returns the extension String.
+    def primary_extension
+      extensions.first
+    end
+
     # Public: Get URL escaped name.
     #
     # Examples
@@ -573,9 +568,8 @@ module Linguist
       :group_name        => options['group'],
       :searchable        => options.key?('searchable') ? options['searchable'] : true,
       :search_term       => options['search_term'],
-      :extensions        => options['extensions'].sort,
+      :extensions        => [options['extensions'].first] + options['extensions'][1..-1].sort,
       :interpreters      => options['interpreters'].sort,
-      :primary_extension => options['primary_extension'],
       :filenames         => options['filenames'],
       :popular           => popular.include?(name)
     )

lib/linguist/lazy_blob.rb

@@ -0,0 +1,37 @@
+require 'linguist/blob_helper'
+require 'rugged'
+
+module Linguist
+  class LazyBlob
+    include BlobHelper
+
+    MAX_SIZE = 128 * 1024
+
+    attr_reader :repository
+    attr_reader :oid
+    attr_reader :name
+    attr_reader :mode
+
+    def initialize(repo, oid, name, mode = nil)
+      @repository = repo
+      @oid = oid
+      @name = name
+      @mode = mode
+    end
+
+    def data
+      load_blob!
+      @data
+    end
+
+    def size
+      load_blob!
+      @size
+    end
+
+    protected
+    def load_blob!
+      @data, @size = Rugged::Blob.to_buffer(repository, oid, MAX_SIZE) if @data.nil?
+    end
+  end
+end

lib/linguist/repository.rb

@@ -1,4 +1,5 @@
-require 'linguist/file_blob'
+require 'linguist/lazy_blob'
+require 'rugged'
 
 module Linguist
   # A Repository is an abstraction of a Grit::Repo or a basic file
@@ -7,100 +8,146 @@ module Linguist
   # Its primary purpose is for gathering language statistics across
   # the entire project.
   class Repository
-    # Public: Initialize a new Repository from a File directory
-    #
-    # base_path - A path String
-    #
-    # Returns a Repository
-    def self.from_directory(base_path)
-      new Dir["#{base_path}/**/*"].
-        select { |f| File.file?(f) }.
-        map { |path| FileBlob.new(path, base_path) }
+    attr_reader :repository
+
+    # Public: Create a new Repository based on the stats of
+    # an existing one
+    def self.incremental(repo, commit_oid, old_commit_oid, old_stats)
+      repo = self.new(repo, commit_oid)
+      repo.load_existing_stats(old_commit_oid, old_stats)
+      repo
     end
 
-    # Public: Initialize a new Repository
+    # Public: Initialize a new Repository to be analyzed for language
+    # data
     #
-    # enum - Enumerator that responds to `each` and
-    #        yields Blob objects
+    # repo - a Rugged::Repository object
+    # commit_oid - the sha1 of the commit that will be analyzed;
+    #              this is usually the master branch
     #
     # Returns a Repository
-    def initialize(enum)
-      @enum = enum
-      @computed_stats = false
-      @language = @size = nil
-      @sizes = Hash.new { 0 }
-      @file_breakdown = Hash.new { |h,k| h[k] = Array.new }
+    def initialize(repo, commit_oid)
+      @repository = repo
+      @commit_oid = commit_oid
+
+      raise TypeError, 'commit_oid must be a commit SHA1' unless commit_oid.is_a?(String)
+    end
+
+    # Public: Load the results of a previous analysis on this repository
+    # to speed up the new scan.
+    #
+    # The new analysis will be performed incrementally as to only take
+    # into account the file changes since the last time the repository
+    # was scanned
+    #
+    # old_commit_oid - the sha1 of the commit that was previously analyzed
+    # old_stats - the result of the previous analysis, obtained by calling
+    #             Repository#cache on the old repository
+    #
+    # Returns nothing
+    def load_existing_stats(old_commit_oid, old_stats)
+      @old_commit_oid = old_commit_oid
+      @old_stats = old_stats
+      nil
     end
 
     # Public: Returns a breakdown of language stats.
     #
     # Examples
     #
-    #   # => { Language['Ruby'] => 46319,
-    #          Language['JavaScript'] => 258 }
+    #   # => { 'Ruby' => 46319,
+    #          'JavaScript' => 258 }
     #
-    # Returns a Hash of Language keys and Integer size values.
+    # Returns a Hash of language names and Integer size values.
     def languages
-      compute_stats
-      @sizes
+      @sizes ||= begin
+        sizes = Hash.new { 0 }
+        cache.each do |_, (language, size)|
+          sizes[language] += size
+        end
+        sizes
+      end
     end
 
     # Public: Get primary Language of repository.
     #
-    # Returns a Language
+    # Returns a language name
     def language
-      compute_stats
-      @language
+      @language ||= begin
+        primary = languages.max_by { |(_, size)| size }
+        primary && primary[0]
+      end
     end
 
     # Public: Get the total size of the repository.
     #
     # Returns a byte size Integer
     def size
-      compute_stats
-      @size
+      @size ||= languages.inject(0) { |s,(_,v)| s + v }
     end
 
     # Public: Return the language breakdown of this repository by file
+    #
+    # Returns a map of language names => [filenames...]
     def breakdown_by_file
-      compute_stats
-      @file_breakdown
+      @file_breakdown ||= begin
+        breakdown = Hash.new { |h,k| h[k] = Array.new }
+        cache.each do |filename, (language, _)|
+          breakdown[language] << filename
+        end
+        breakdown
+      end
     end
 
-    # Internal: Compute language breakdown for each blob in the Repository.
+    # Public: Return the cached results of the analysis
     #
-    # Returns nothing
-    def compute_stats
-      return if @computed_stats
+    # This is a per-file breakdown that can be passed to other instances
+    # of Linguist::Repository to perform incremental scans
+    #
+    # Returns a map of filename => [language, size]
+    def cache
+      @cache ||= begin
+        if @old_commit_oid == @commit_oid
+          @old_stats
+        else
+          compute_stats(@old_commit_oid, @commit_oid, @old_stats)
+        end
+      end
+    end
 
-      @enum.each do |blob|
-        # Skip files that are likely binary
-        next if blob.likely_binary?
+    protected
+    def compute_stats(old_commit_oid, commit_oid, cache = nil)
+      file_map = cache ? cache.dup : {}
+      old_tree = old_commit_oid && Rugged::Commit.lookup(repository, old_commit_oid).tree
+      new_tree = Rugged::Commit.lookup(repository, commit_oid).tree
 
-        # Skip vendored or generated blobs
-        next if blob.vendored? || blob.generated? || blob.language.nil?
+      diff = Rugged::Tree.diff(repository, old_tree, new_tree)
 
-        # Only include programming languages and acceptable markup languages
-        if blob.language.type == :programming || Language.detectable_markup.include?(blob.language.name)
+      diff.each_delta do |delta|
+        old = delta.old_file[:path]
+        new = delta.new_file[:path]
 
-          # Build up the per-file breakdown stats
-          @file_breakdown[blob.language.group.name] << blob.name
+        file_map.delete(old)
+        next if delta.binary
 
-          @sizes[blob.language.group] += blob.size
+        if [:added, :modified].include? delta.status
+          # Skip submodules
+          mode = delta.new_file[:mode]
+          next if (mode & 040000) != 0
+
+          blob = Linguist::LazyBlob.new(repository, delta.new_file[:oid], new, mode.to_s(8))
+
+          # Skip vendored or generated blobs
+          next if blob.vendored? || blob.generated? || blob.language.nil?
+
+          # Only include programming languages and acceptable markup languages
+          if blob.language.type == :programming || Language.detectable_markup.include?(blob.language.name)
+            file_map[new] = [blob.language.group.name, blob.size]
+          end
         end
       end
 
-      # Compute total size
-      @size = @sizes.inject(0) { |s,(_,v)| s + v }
-
-      # Get primary language
-      if primary = @sizes.max_by { |(_, size)| size }
-        @language = primary[0]
-      end
-
-      @computed_stats = true
-
-      nil
+      file_map
     end
   end
 end

lib/linguist/samples.rb

@@ -28,7 +28,7 @@ module Linguist
     #
     # Returns nothing.
     def self.each(&block)
-      Dir.entries(ROOT).each do |category|
+      Dir.entries(ROOT).sort!.each do |category|
         next if category == '.' || category == '..'
 
         # Skip text and binary for now

lib/linguist/vendor.yml

@@ -40,9 +40,13 @@
 - foundation.min.css
 - foundation.css
 
+# Normalize.css
+- normalize.css
+
 # Vendored dependencies
 - thirdparty/
 - vendors?/
+- extern(al)?/
 
 # Debian packaging
 - ^debian/
@@ -98,9 +102,16 @@
 # AngularJS
 - (^|/)angular([^.]*)(\.min)?\.js$
 
+# D3.js
+- (^|\/)d3(\.v\d+)?([^.]*)(\.min)?\.js$
+
 # React
 - (^|/)react(-[^.]*)?(\.min)?\.js$
 
+# Modernizr
+- (^|/)modernizr\-\d\.\d+(\.\d+)?(\.min)?\.js$
+- (^|/)modernizr\.custom\.\d+\.js$
+
 ## Python ##
 
 # django
@@ -117,6 +128,9 @@
 
 ## Obj-C ##
 
+# Cocoapods
+- ^Pods/
+
 # Sparkle
 - (^|/)Sparkle/
 
@@ -141,7 +155,7 @@
 - (^|/)[Mm]icrosoft([Mm]vc)?([Aa]jax|[Vv]alidation)(\.debug)?\.js$
 
 # NuGet
-- ^[Pp]ackages/
+- ^[Pp]ackages\/.+\.\d+\/
 
 # ExtJS
 - (^|/)extjs/.*?\.js$
@@ -161,6 +175,9 @@
 - (^|/)extjs/src/
 - (^|/)extjs/welcome/
 
+# Html5shiv
+- (^|/)html5shiv(\.min)?\.js$
+
 # Samples folders
 - ^[Ss]amples/
 
@@ -189,3 +206,12 @@
 
 # Mercury --use-subdirs
 - Mercury/
+
+# R packages
+- ^vignettes/
+- ^inst/extdata/
+
+# Octicons
+- octicons.css
+- octicons.min.css
+- sprockets-octicons.scss

lib/linguist/version.rb

@@ -0,0 +1,3 @@
+module Linguist
+  VERSION = "3.1.0"
+end

samples/Assembly/FASM.asm

@@ -0,0 +1,350 @@
+
+; flat assembler interface for Win32
+; Copyright (c) 1999-2014, Tomasz Grysztar.
+; All rights reserved.
+
+	format	PE console
+
+section '.text' code readable executable
+
+start:
+
+	mov	[con_handle],STD_OUTPUT_HANDLE
+	mov	esi,_logo
+	call	display_string
+
+	call	get_params
+	jc	information
+
+	call	init_memory
+
+	mov	esi,_memory_prefix
+	call	display_string
+	mov	eax,[memory_end]
+	sub	eax,[memory_start]
+	add	eax,[additional_memory_end]
+	sub	eax,[additional_memory]
+	shr	eax,10
+	call	display_number
+	mov	esi,_memory_suffix
+	call	display_string
+
+	call	[GetTickCount]
+	mov	[start_time],eax
+
+	call	preprocessor
+	call	parser
+	call	assembler
+	call	formatter
+
+	call	display_user_messages
+	movzx	eax,[current_pass]
+	inc	eax
+	call	display_number
+	mov	esi,_passes_suffix
+	call	display_string
+	call	[GetTickCount]
+	sub	eax,[start_time]
+	xor	edx,edx
+	mov	ebx,100
+	div	ebx
+	or	eax,eax
+	jz	display_bytes_count
+	xor	edx,edx
+	mov	ebx,10
+	div	ebx
+	push	edx
+	call	display_number
+	mov	dl,'.'
+	call	display_character
+	pop	eax
+	call	display_number
+	mov	esi,_seconds_suffix
+	call	display_string
+      display_bytes_count:
+	mov	eax,[written_size]
+	call	display_number
+	mov	esi,_bytes_suffix
+	call	display_string
+	xor	al,al
+	jmp	exit_program
+
+information:
+	mov	esi,_usage
+	call	display_string
+	mov	al,1
+	jmp	exit_program
+
+get_params:
+	mov	[input_file],0
+	mov	[output_file],0
+	mov	[symbols_file],0
+	mov	[memory_setting],0
+	mov	[passes_limit],100
+	call	[GetCommandLine]
+	mov	esi,eax
+	mov	edi,params
+    find_command_start:
+	lodsb
+	cmp	al,20h
+	je	find_command_start
+	cmp	al,22h
+	je	skip_quoted_name
+    skip_name:
+	lodsb
+	cmp	al,20h
+	je	find_param
+	or	al,al
+	jz	all_params
+	jmp	skip_name
+    skip_quoted_name:
+	lodsb
+	cmp	al,22h
+	je	find_param
+	or	al,al
+	jz	all_params
+	jmp	skip_quoted_name
+    find_param:
+	lodsb
+	cmp	al,20h
+	je	find_param
+	cmp	al,'-'
+	je	option_param
+	cmp	al,0Dh
+	je	all_params
+	or	al,al
+	jz	all_params
+	cmp	[input_file],0
+	jne	get_output_file
+	mov	[input_file],edi
+	jmp	process_param
+      get_output_file:
+	cmp	[output_file],0
+	jne	bad_params
+	mov	[output_file],edi
+    process_param:
+	cmp	al,22h
+	je	string_param
+    copy_param:
+	stosb
+	lodsb
+	cmp	al,20h
+	je	param_end
+	cmp	al,0Dh
+	je	param_end
+	or	al,al
+	jz	param_end
+	jmp	copy_param
+    string_param:
+	lodsb
+	cmp	al,22h
+	je	string_param_end
+	cmp	al,0Dh
+	je	param_end
+	or	al,al
+	jz	param_end
+	stosb
+	jmp	string_param
+    option_param:
+	lodsb
+	cmp	al,'m'
+	je	memory_option
+	cmp	al,'M'
+	je	memory_option
+	cmp	al,'p'
+	je	passes_option
+	cmp	al,'P'
+	je	passes_option
+	cmp	al,'s'
+	je	symbols_option
+	cmp	al,'S'
+	je	symbols_option
+    bad_params:
+	stc
+	ret
+    get_option_value:
+	xor	eax,eax
+	mov	edx,eax
+    get_option_digit:
+	lodsb
+	cmp	al,20h
+	je	option_value_ok
+	cmp	al,0Dh
+	je	option_value_ok
+	or	al,al
+	jz	option_value_ok
+	sub	al,30h
+	jc	invalid_option_value
+	cmp	al,9
+	ja	invalid_option_value
+	imul	edx,10
+	jo	invalid_option_value
+	add	edx,eax
+	jc	invalid_option_value
+	jmp	get_option_digit
+    option_value_ok:
+	dec	esi
+	clc
+	ret
+    invalid_option_value:
+	stc
+	ret
+    memory_option:
+	lodsb
+	cmp	al,20h
+	je	memory_option
+	cmp	al,0Dh
+	je	bad_params
+	or	al,al
+	jz	bad_params
+	dec	esi
+	call	get_option_value
+	or	edx,edx
+	jz	bad_params
+	cmp	edx,1 shl (32-10)
+	jae	bad_params
+	mov	[memory_setting],edx
+	jmp	find_param
+    passes_option:
+	lodsb
+	cmp	al,20h
+	je	passes_option
+	cmp	al,0Dh
+	je	bad_params
+	or	al,al
+	jz	bad_params
+	dec	esi
+	call	get_option_value
+	or	edx,edx
+	jz	bad_params
+	cmp	edx,10000h
+	ja	bad_params
+	mov	[passes_limit],dx
+	jmp	find_param
+    symbols_option:
+	mov	[symbols_file],edi
+      find_symbols_file_name:
+	lodsb
+	cmp	al,20h
+	jne	process_param
+	jmp	find_symbols_file_name
+    param_end:
+	dec	esi
+    string_param_end:
+	xor	al,al
+	stosb
+	jmp	find_param
+    all_params:
+	cmp	[input_file],0
+	je	bad_params
+	clc
+	ret
+
+include 'system.inc'
+
+include '..\errors.inc'
+include '..\symbdump.inc'
+include '..\preproce.inc'
+include '..\parser.inc'
+include '..\exprpars.inc'
+include '..\assemble.inc'
+include '..\exprcalc.inc'
+include '..\formats.inc'
+include '..\x86_64.inc'
+include '..\avx.inc'
+
+include '..\tables.inc'
+include '..\messages.inc'
+
+section '.data' data readable writeable
+
+include '..\version.inc'
+
+_copyright db 'Copyright (c) 1999-2014, Tomasz Grysztar',0Dh,0Ah,0
+
+_logo db 'flat assembler  version ',VERSION_STRING,0
+_usage db 0Dh,0Ah
+       db 'usage: fasm <source> [output]',0Dh,0Ah
+       db 'optional settings:',0Dh,0Ah
+       db ' -m <limit>    set the limit in kilobytes for the available memory',0Dh,0Ah
+       db ' -p <limit>    set the maximum allowed number of passes',0Dh,0Ah
+       db ' -s <file>     dump symbolic information for debugging',0Dh,0Ah
+       db 0
+_memory_prefix db '  (',0
+_memory_suffix db ' kilobytes memory)',0Dh,0Ah,0
+_passes_suffix db ' passes, ',0
+_seconds_suffix db ' seconds, ',0
+_bytes_suffix db ' bytes.',0Dh,0Ah,0
+
+align 4
+
+include '..\variable.inc'
+
+con_handle dd ?
+memory_setting dd ?
+start_time dd ?
+bytes_count dd ?
+displayed_count dd ?
+character db ?
+last_displayed rb 2
+
+params rb 1000h
+options rb 1000h
+buffer rb 4000h
+
+stack 10000h
+
+section '.idata' import data readable writeable
+
+  dd 0,0,0,rva kernel_name,rva kernel_table
+  dd 0,0,0,0,0
+
+  kernel_table:
+    ExitProcess dd rva _ExitProcess
+    CreateFile dd rva _CreateFileA
+    ReadFile dd rva _ReadFile
+    WriteFile dd rva _WriteFile
+    CloseHandle dd rva _CloseHandle
+    SetFilePointer dd rva _SetFilePointer
+    GetCommandLine dd rva _GetCommandLineA
+    GetEnvironmentVariable dd rva _GetEnvironmentVariable
+    GetStdHandle dd rva _GetStdHandle
+    VirtualAlloc dd rva _VirtualAlloc
+    VirtualFree dd rva _VirtualFree
+    GetTickCount dd rva _GetTickCount
+    GetSystemTime dd rva _GetSystemTime
+    GlobalMemoryStatus dd rva _GlobalMemoryStatus
+    dd 0
+
+  kernel_name db 'KERNEL32.DLL',0
+
+  _ExitProcess dw 0
+    db 'ExitProcess',0
+  _CreateFileA dw 0
+    db 'CreateFileA',0
+  _ReadFile dw 0
+    db 'ReadFile',0
+  _WriteFile dw 0
+    db 'WriteFile',0
+  _CloseHandle dw 0
+    db 'CloseHandle',0
+  _SetFilePointer dw 0
+    db 'SetFilePointer',0
+  _GetCommandLineA dw 0
+    db 'GetCommandLineA',0
+  _GetEnvironmentVariable dw 0
+    db 'GetEnvironmentVariableA',0
+  _GetStdHandle dw 0
+    db 'GetStdHandle',0
+  _VirtualAlloc dw 0
+    db 'VirtualAlloc',0
+  _VirtualFree dw 0
+    db 'VirtualFree',0
+  _GetTickCount dw 0
+    db 'GetTickCount',0
+  _GetSystemTime dw 0
+    db 'GetSystemTime',0
+  _GlobalMemoryStatus dw 0
+    db 'GlobalMemoryStatus',0
+
+section '.reloc' fixups data readable discardable

samples/BlitzMax/sample.bmx

@@ -0,0 +1,25 @@
+SuperStrict
+
+Framework Brl.StandardIO
+
+Type TMyType
+	Field property:int
+
+	Function A:int(param:int)
+		'do nothing
+	End Function
+
+	Method B:int(param:int)
+		'do nothing
+	End Method
+End Type
+
+
+Global my:TMyType = new TMyType
+?Win32
+	my.A()
+	my.B()
+?Linux
+	my.B()
+	my.A()
+?

samples/C++/epoll_reactor.ipp

@@ -0,0 +1,664 @@
+//
+// detail/impl/epoll_reactor.ipp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2013 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_ASIO_DETAIL_IMPL_EPOLL_REACTOR_IPP
+#define BOOST_ASIO_DETAIL_IMPL_EPOLL_REACTOR_IPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if defined(BOOST_ASIO_HAS_EPOLL)
+
+#include <cstddef>
+#include <sys/epoll.h>
+#include <boost/asio/detail/epoll_reactor.hpp>
+#include <boost/asio/detail/throw_error.hpp>
+#include <boost/asio/error.hpp>
+
+#if defined(BOOST_ASIO_HAS_TIMERFD)
+# include <sys/timerfd.h>
+#endif // defined(BOOST_ASIO_HAS_TIMERFD)
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+epoll_reactor::epoll_reactor(boost::asio::io_service& io_service)
+  : boost::asio::detail::service_base<epoll_reactor>(io_service),
+    io_service_(use_service<io_service_impl>(io_service)),
+    mutex_(),
+    interrupter_(),
+    epoll_fd_(do_epoll_create()),
+    timer_fd_(do_timerfd_create()),
+    shutdown_(false)
+{
+  // Add the interrupter's descriptor to epoll.
+  epoll_event ev = { 0, { 0 } };
+  ev.events = EPOLLIN | EPOLLERR | EPOLLET;
+  ev.data.ptr = &interrupter_;
+  epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, interrupter_.read_descriptor(), &ev);
+  interrupter_.interrupt();
+
+  // Add the timer descriptor to epoll.
+  if (timer_fd_ != -1)
+  {
+    ev.events = EPOLLIN | EPOLLERR;
+    ev.data.ptr = &timer_fd_;
+    epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, timer_fd_, &ev);
+  }
+}
+
+epoll_reactor::~epoll_reactor()
+{
+  if (epoll_fd_ != -1)
+    close(epoll_fd_);
+  if (timer_fd_ != -1)
+    close(timer_fd_);
+}
+
+void epoll_reactor::shutdown_service()
+{
+  mutex::scoped_lock lock(mutex_);
+  shutdown_ = true;
+  lock.unlock();
+
+  op_queue<operation> ops;
+
+  while (descriptor_state* state = registered_descriptors_.first())
+  {
+    for (int i = 0; i < max_ops; ++i)
+      ops.push(state->op_queue_[i]);
+    state->shutdown_ = true;
+    registered_descriptors_.free(state);
+  }
+
+  timer_queues_.get_all_timers(ops);
+
+  io_service_.abandon_operations(ops);
+}
+
+void epoll_reactor::fork_service(boost::asio::io_service::fork_event fork_ev)
+{
+  if (fork_ev == boost::asio::io_service::fork_child)
+  {
+    if (epoll_fd_ != -1)
+      ::close(epoll_fd_);
+    epoll_fd_ = -1;
+    epoll_fd_ = do_epoll_create();
+
+    if (timer_fd_ != -1)
+      ::close(timer_fd_);
+    timer_fd_ = -1;
+    timer_fd_ = do_timerfd_create();
+
+    interrupter_.recreate();
+
+    // Add the interrupter's descriptor to epoll.
+    epoll_event ev = { 0, { 0 } };
+    ev.events = EPOLLIN | EPOLLERR | EPOLLET;
+    ev.data.ptr = &interrupter_;
+    epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, interrupter_.read_descriptor(), &ev);
+    interrupter_.interrupt();
+
+    // Add the timer descriptor to epoll.
+    if (timer_fd_ != -1)
+    {
+      ev.events = EPOLLIN | EPOLLERR;
+      ev.data.ptr = &timer_fd_;
+      epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, timer_fd_, &ev);
+    }
+
+    update_timeout();
+
+    // Re-register all descriptors with epoll.
+    mutex::scoped_lock descriptors_lock(registered_descriptors_mutex_);
+    for (descriptor_state* state = registered_descriptors_.first();
+        state != 0; state = state->next_)
+    {
+      ev.events = state->registered_events_;
+      ev.data.ptr = state;
+      int result = epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, state->descriptor_, &ev);
+      if (result != 0)
+      {
+        boost::system::error_code ec(errno,
+            boost::asio::error::get_system_category());
+        boost::asio::detail::throw_error(ec, "epoll re-registration");
+      }
+    }
+  }
+}
+
+void epoll_reactor::init_task()
+{
+  io_service_.init_task();
+}
+
+int epoll_reactor::register_descriptor(socket_type descriptor,
+    epoll_reactor::per_descriptor_data& descriptor_data)
+{
+  descriptor_data = allocate_descriptor_state();
+
+  {
+    mutex::scoped_lock descriptor_lock(descriptor_data->mutex_);
+
+    descriptor_data->reactor_ = this;
+    descriptor_data->descriptor_ = descriptor;
+    descriptor_data->shutdown_ = false;
+  }
+
+  epoll_event ev = { 0, { 0 } };
+  ev.events = EPOLLIN | EPOLLERR | EPOLLHUP | EPOLLPRI | EPOLLET;
+  descriptor_data->registered_events_ = ev.events;
+  ev.data.ptr = descriptor_data;
+  int result = epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, descriptor, &ev);
+  if (result != 0)
+    return errno;
+
+  return 0;
+}
+
+int epoll_reactor::register_internal_descriptor(
+    int op_type, socket_type descriptor,
+    epoll_reactor::per_descriptor_data& descriptor_data, reactor_op* op)
+{
+  descriptor_data = allocate_descriptor_state();
+
+  {
+    mutex::scoped_lock descriptor_lock(descriptor_data->mutex_);
+
+    descriptor_data->reactor_ = this;
+    descriptor_data->descriptor_ = descriptor;
+    descriptor_data->shutdown_ = false;
+    descriptor_data->op_queue_[op_type].push(op);
+  }
+
+  epoll_event ev = { 0, { 0 } };
+  ev.events = EPOLLIN | EPOLLERR | EPOLLHUP | EPOLLPRI | EPOLLET;
+  descriptor_data->registered_events_ = ev.events;
+  ev.data.ptr = descriptor_data;
+  int result = epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, descriptor, &ev);
+  if (result != 0)
+    return errno;
+
+  return 0;
+}
+
+void epoll_reactor::move_descriptor(socket_type,
+    epoll_reactor::per_descriptor_data& target_descriptor_data,
+    epoll_reactor::per_descriptor_data& source_descriptor_data)
+{
+  target_descriptor_data = source_descriptor_data;
+  source_descriptor_data = 0;
+}
+
+void epoll_reactor::start_op(int op_type, socket_type descriptor,
+    epoll_reactor::per_descriptor_data& descriptor_data, reactor_op* op,
+    bool is_continuation, bool allow_speculative)
+{
+  if (!descriptor_data)
+  {
+    op->ec_ = boost::asio::error::bad_descriptor;
+    post_immediate_completion(op, is_continuation);
+    return;
+  }
+
+  mutex::scoped_lock descriptor_lock(descriptor_data->mutex_);
+
+  if (descriptor_data->shutdown_)
+  {
+    post_immediate_completion(op, is_continuation);
+    return;
+  }
+
+  if (descriptor_data->op_queue_[op_type].empty())
+  {
+    if (allow_speculative
+        && (op_type != read_op
+          || descriptor_data->op_queue_[except_op].empty()))
+    {
+      if (op->perform())
+      {
+        descriptor_lock.unlock();
+        io_service_.post_immediate_completion(op, is_continuation);
+        return;
+      }
+
+      if (op_type == write_op)
+      {
+        if ((descriptor_data->registered_events_ & EPOLLOUT) == 0)
+        {
+          epoll_event ev = { 0, { 0 } };
+          ev.events = descriptor_data->registered_events_ | EPOLLOUT;
+          ev.data.ptr = descriptor_data;
+          if (epoll_ctl(epoll_fd_, EPOLL_CTL_MOD, descriptor, &ev) == 0)
+          {
+            descriptor_data->registered_events_ |= ev.events;
+          }
+          else
+          {
+            op->ec_ = boost::system::error_code(errno,
+                boost::asio::error::get_system_category());
+            io_service_.post_immediate_completion(op, is_continuation);
+            return;
+          }
+        }
+      }
+    }
+    else
+    {
+      if (op_type == write_op)
+      {
+        descriptor_data->registered_events_ |= EPOLLOUT;
+      }
+
+      epoll_event ev = { 0, { 0 } };
+      ev.events = descriptor_data->registered_events_;
+      ev.data.ptr = descriptor_data;
+      epoll_ctl(epoll_fd_, EPOLL_CTL_MOD, descriptor, &ev);
+    }
+  }
+
+  descriptor_data->op_queue_[op_type].push(op);
+  io_service_.work_started();
+}
+
+void epoll_reactor::cancel_ops(socket_type,
+    epoll_reactor::per_descriptor_data& descriptor_data)
+{
+  if (!descriptor_data)
+    return;
+
+  mutex::scoped_lock descriptor_lock(descriptor_data->mutex_);
+
+  op_queue<operation> ops;
+  for (int i = 0; i < max_ops; ++i)
+  {
+    while (reactor_op* op = descriptor_data->op_queue_[i].front())
+    {
+      op->ec_ = boost::asio::error::operation_aborted;
+      descriptor_data->op_queue_[i].pop();
+      ops.push(op);
+    }
+  }
+
+  descriptor_lock.unlock();
+
+  io_service_.post_deferred_completions(ops);
+}
+
+void epoll_reactor::deregister_descriptor(socket_type descriptor,
+    epoll_reactor::per_descriptor_data& descriptor_data, bool closing)
+{
+  if (!descriptor_data)
+    return;
+
+  mutex::scoped_lock descriptor_lock(descriptor_data->mutex_);
+
+  if (!descriptor_data->shutdown_)
+  {
+    if (closing)
+    {
+      // The descriptor will be automatically removed from the epoll set when
+      // it is closed.
+    }
+    else
+    {
+      epoll_event ev = { 0, { 0 } };
+      epoll_ctl(epoll_fd_, EPOLL_CTL_DEL, descriptor, &ev);
+    }
+
+    op_queue<operation> ops;
+    for (int i = 0; i < max_ops; ++i)
+    {
+      while (reactor_op* op = descriptor_data->op_queue_[i].front())
+      {
+        op->ec_ = boost::asio::error::operation_aborted;
+        descriptor_data->op_queue_[i].pop();
+        ops.push(op);
+      }
+    }
+
+    descriptor_data->descriptor_ = -1;
+    descriptor_data->shutdown_ = true;
+
+    descriptor_lock.unlock();
+
+    free_descriptor_state(descriptor_data);
+    descriptor_data = 0;
+
+    io_service_.post_deferred_completions(ops);
+  }
+}
+
+void epoll_reactor::deregister_internal_descriptor(socket_type descriptor,
+    epoll_reactor::per_descriptor_data& descriptor_data)
+{
+  if (!descriptor_data)
+    return;
+
+  mutex::scoped_lock descriptor_lock(descriptor_data->mutex_);
+
+  if (!descriptor_data->shutdown_)
+  {
+    epoll_event ev = { 0, { 0 } };
+    epoll_ctl(epoll_fd_, EPOLL_CTL_DEL, descriptor, &ev);
+
+    op_queue<operation> ops;
+    for (int i = 0; i < max_ops; ++i)
+      ops.push(descriptor_data->op_queue_[i]);
+
+    descriptor_data->descriptor_ = -1;
+    descriptor_data->shutdown_ = true;
+
+    descriptor_lock.unlock();
+
+    free_descriptor_state(descriptor_data);
+    descriptor_data = 0;
+  }
+}
+
+void epoll_reactor::run(bool block, op_queue<operation>& ops)
+{
+  // This code relies on the fact that the task_io_service queues the reactor
+  // task behind all descriptor operations generated by this function. This
+  // means, that by the time we reach this point, any previously returned
+  // descriptor operations have already been dequeued. Therefore it is now safe
+  // for us to reuse and return them for the task_io_service to queue again.
+
+  // Calculate a timeout only if timerfd is not used.
+  int timeout;
+  if (timer_fd_ != -1)
+    timeout = block ? -1 : 0;
+  else
+  {
+    mutex::scoped_lock lock(mutex_);
+    timeout = block ? get_timeout() : 0;
+  }
+
+  // Block on the epoll descriptor.
+  epoll_event events[128];
+  int num_events = epoll_wait(epoll_fd_, events, 128, timeout);
+
+#if defined(BOOST_ASIO_HAS_TIMERFD)
+  bool check_timers = (timer_fd_ == -1);
+#else // defined(BOOST_ASIO_HAS_TIMERFD)
+  bool check_timers = true;
+#endif // defined(BOOST_ASIO_HAS_TIMERFD)
+
+  // Dispatch the waiting events.
+  for (int i = 0; i < num_events; ++i)
+  {
+    void* ptr = events[i].data.ptr;
+    if (ptr == &interrupter_)
+    {
+      // No need to reset the interrupter since we're leaving the descriptor
+      // in a ready-to-read state and relying on edge-triggered notifications
+      // to make it so that we only get woken up when the descriptor's epoll
+      // registration is updated.
+
+#if defined(BOOST_ASIO_HAS_TIMERFD)
+      if (timer_fd_ == -1)
+        check_timers = true;
+#else // defined(BOOST_ASIO_HAS_TIMERFD)
+      check_timers = true;
+#endif // defined(BOOST_ASIO_HAS_TIMERFD)
+    }
+#if defined(BOOST_ASIO_HAS_TIMERFD)
+    else if (ptr == &timer_fd_)
+    {
+      check_timers = true;
+    }
+#endif // defined(BOOST_ASIO_HAS_TIMERFD)
+    else
+    {
+      // The descriptor operation doesn't count as work in and of itself, so we
+      // don't call work_started() here. This still allows the io_service to
+      // stop if the only remaining operations are descriptor operations.
+      descriptor_state* descriptor_data = static_cast<descriptor_state*>(ptr);
+      descriptor_data->set_ready_events(events[i].events);
+      ops.push(descriptor_data);
+    }
+  }
+
+  if (check_timers)
+  {
+    mutex::scoped_lock common_lock(mutex_);
+    timer_queues_.get_ready_timers(ops);
+
+#if defined(BOOST_ASIO_HAS_TIMERFD)
+    if (timer_fd_ != -1)
+    {
+      itimerspec new_timeout;
+      itimerspec old_timeout;
+      int flags = get_timeout(new_timeout);
+      timerfd_settime(timer_fd_, flags, &new_timeout, &old_timeout);
+    }
+#endif // defined(BOOST_ASIO_HAS_TIMERFD)
+  }
+}
+
+void epoll_reactor::interrupt()
+{
+  epoll_event ev = { 0, { 0 } };
+  ev.events = EPOLLIN | EPOLLERR | EPOLLET;
+  ev.data.ptr = &interrupter_;
+  epoll_ctl(epoll_fd_, EPOLL_CTL_MOD, interrupter_.read_descriptor(), &ev);
+}
+
+int epoll_reactor::do_epoll_create()
+{
+#if defined(EPOLL_CLOEXEC)
+  int fd = epoll_create1(EPOLL_CLOEXEC);
+#else // defined(EPOLL_CLOEXEC)
+  int fd = -1;
+  errno = EINVAL;
+#endif // defined(EPOLL_CLOEXEC)
+
+  if (fd == -1 && (errno == EINVAL || errno == ENOSYS))
+  {
+    fd = epoll_create(epoll_size);
+    if (fd != -1)
+      ::fcntl(fd, F_SETFD, FD_CLOEXEC);
+  }
+
+  if (fd == -1)
+  {
+    boost::system::error_code ec(errno,
+        boost::asio::error::get_system_category());
+    boost::asio::detail::throw_error(ec, "epoll");
+  }
+
+  return fd;
+}
+
+int epoll_reactor::do_timerfd_create()
+{
+#if defined(BOOST_ASIO_HAS_TIMERFD)
+# if defined(TFD_CLOEXEC)
+  int fd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
+# else // defined(TFD_CLOEXEC)
+  int fd = -1;
+  errno = EINVAL;
+# endif // defined(TFD_CLOEXEC)
+
+  if (fd == -1 && errno == EINVAL)
+  {
+    fd = timerfd_create(CLOCK_MONOTONIC, 0);
+    if (fd != -1)
+      ::fcntl(fd, F_SETFD, FD_CLOEXEC);
+  }
+
+  return fd;
+#else // defined(BOOST_ASIO_HAS_TIMERFD)
+  return -1;
+#endif // defined(BOOST_ASIO_HAS_TIMERFD)
+}
+
+epoll_reactor::descriptor_state* epoll_reactor::allocate_descriptor_state()
+{
+  mutex::scoped_lock descriptors_lock(registered_descriptors_mutex_);
+  return registered_descriptors_.alloc();
+}
+
+void epoll_reactor::free_descriptor_state(epoll_reactor::descriptor_state* s)
+{
+  mutex::scoped_lock descriptors_lock(registered_descriptors_mutex_);
+  registered_descriptors_.free(s);
+}
+
+void epoll_reactor::do_add_timer_queue(timer_queue_base& queue)
+{
+  mutex::scoped_lock lock(mutex_);
+  timer_queues_.insert(&queue);
+}
+
+void epoll_reactor::do_remove_timer_queue(timer_queue_base& queue)
+{
+  mutex::scoped_lock lock(mutex_);
+  timer_queues_.erase(&queue);
+}
+
+void epoll_reactor::update_timeout()
+{
+#if defined(BOOST_ASIO_HAS_TIMERFD)
+  if (timer_fd_ != -1)
+  {
+    itimerspec new_timeout;
+    itimerspec old_timeout;
+    int flags = get_timeout(new_timeout);
+    timerfd_settime(timer_fd_, flags, &new_timeout, &old_timeout);
+    return;
+  }
+#endif // defined(BOOST_ASIO_HAS_TIMERFD)
+  interrupt();
+}
+
+int epoll_reactor::get_timeout()
+{
+  // By default we will wait no longer than 5 minutes. This will ensure that
+  // any changes to the system clock are detected after no longer than this.
+  return timer_queues_.wait_duration_msec(5 * 60 * 1000);
+}
+
+#if defined(BOOST_ASIO_HAS_TIMERFD)
+int epoll_reactor::get_timeout(itimerspec& ts)
+{
+  ts.it_interval.tv_sec = 0;
+  ts.it_interval.tv_nsec = 0;
+
+  long usec = timer_queues_.wait_duration_usec(5 * 60 * 1000 * 1000);
+  ts.it_value.tv_sec = usec / 1000000;
+  ts.it_value.tv_nsec = usec ? (usec % 1000000) * 1000 : 1;
+
+  return usec ? 0 : TFD_TIMER_ABSTIME;
+}
+#endif // defined(BOOST_ASIO_HAS_TIMERFD)
+
+struct epoll_reactor::perform_io_cleanup_on_block_exit
+{
+  explicit perform_io_cleanup_on_block_exit(epoll_reactor* r)
+    : reactor_(r), first_op_(0)
+  {
+  }
+
+  ~perform_io_cleanup_on_block_exit()
+  {
+    if (first_op_)
+    {
+      // Post the remaining completed operations for invocation.
+      if (!ops_.empty())
+        reactor_->io_service_.post_deferred_completions(ops_);
+
+      // A user-initiated operation has completed, but there's no need to
+      // explicitly call work_finished() here. Instead, we'll take advantage of
+      // the fact that the task_io_service will call work_finished() once we
+      // return.
+    }
+    else
+    {
+      // No user-initiated operations have completed, so we need to compensate
+      // for the work_finished() call that the task_io_service will make once
+      // this operation returns.
+      reactor_->io_service_.work_started();
+    }
+  }
+
+  epoll_reactor* reactor_;
+  op_queue<operation> ops_;
+  operation* first_op_;
+};
+
+epoll_reactor::descriptor_state::descriptor_state()
+  : operation(&epoll_reactor::descriptor_state::do_complete)
+{
+}
+
+operation* epoll_reactor::descriptor_state::perform_io(uint32_t events)
+{
+  mutex_.lock();
+  perform_io_cleanup_on_block_exit io_cleanup(reactor_);
+  mutex::scoped_lock descriptor_lock(mutex_, mutex::scoped_lock::adopt_lock);
+
+  // Exception operations must be processed first to ensure that any
+  // out-of-band data is read before normal data.
+  static const int flag[max_ops] = { EPOLLIN, EPOLLOUT, EPOLLPRI };
+  for (int j = max_ops - 1; j >= 0; --j)
+  {
+    if (events & (flag[j] | EPOLLERR | EPOLLHUP))
+    {
+      while (reactor_op* op = op_queue_[j].front())
+      {
+        if (op->perform())
+        {
+          op_queue_[j].pop();
+          io_cleanup.ops_.push(op);
+        }
+        else
+          break;
+      }
+    }
+  }
+
+  // The first operation will be returned for completion now. The others will
+  // be posted for later by the io_cleanup object's destructor.
+  io_cleanup.first_op_ = io_cleanup.ops_.front();
+  io_cleanup.ops_.pop();
+  return io_cleanup.first_op_;
+}
+
+void epoll_reactor::descriptor_state::do_complete(
+    io_service_impl* owner, operation* base,
+    const boost::system::error_code& ec, std::size_t bytes_transferred)
+{
+  if (owner)
+  {
+    descriptor_state* descriptor_data = static_cast<descriptor_state*>(base);
+    uint32_t events = static_cast<uint32_t>(bytes_transferred);
+    if (operation* op = descriptor_data->perform_io(events))
+    {
+      op->complete(*owner, ec, 0);
+    }
+  }
+}
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // defined(BOOST_ASIO_HAS_EPOLL)
+
+#endif // BOOST_ASIO_DETAIL_IMPL_EPOLL_REACTOR_IPP

samples/Component Pascal/Example.cp

@@ -0,0 +1,130 @@
+MODULE ObxControls;
+(**
+    project         = "BlackBox"
+    organization    = "www.oberon.ch"
+    contributors    = "Oberon microsystems"
+    version         = "System/Rsrc/About"
+    copyright       = "System/Rsrc/About"
+    license         = "Docu/BB-License"
+    changes         = ""
+    issues          = ""
+
+**)
+
+IMPORT Dialog, Ports, Properties, Views;
+
+CONST beginner = 0; advanced = 1; expert = 2; guru = 3;    (* user classes *)
+
+TYPE
+    View = POINTER TO RECORD (Views.View)
+        size: INTEGER    (* border size in mm *)
+    END;
+
+VAR
+    data*: RECORD
+        class*: INTEGER;    (* current user class *)
+        list*: Dialog.List;    (* list of currently available sizes, derived from class *)
+        width*: INTEGER    (* width of next view to be opened. Derived from
+                                    class, or entered through a text entry field *)
+    END;
+
+    predef: ARRAY 6 OF INTEGER;    (* table of predefined sizes *)
+
+
+PROCEDURE SetList;
+BEGIN
+    IF data.class = beginner THEN
+        data.list.SetLen(1);
+        data.list.SetItem(0, "default")
+    ELSIF data.class = advanced THEN
+        data.list.SetLen(4);
+        data.list.SetItem(0, "default");
+        data.list.SetItem(1, "small");
+        data.list.SetItem(2, "medium");
+        data.list.SetItem(3, "large");
+    ELSE
+        data.list.SetLen(6);
+        data.list.SetItem(0, "default");
+        data.list.SetItem(1, "small");
+        data.list.SetItem(2, "medium");
+        data.list.SetItem(3, "large");
+        data.list.SetItem(4, "tiny");
+        data.list.SetItem(5, "huge");
+    END
+END SetList;
+
+(* View *)
+
+PROCEDURE (v: View) CopyFromSimpleView (source: Views.View);
+BEGIN
+    v.size := source(View).size
+END CopyFromSimpleView;
+
+PROCEDURE (v: View) Restore (f: Views.Frame; l, t, r, b: INTEGER);
+BEGIN    (* fill view with a red square of size v.size *)
+    IF v.size = 0 THEN v.size := predef[0] END;    (* lazy initialization of size *)
+    f.DrawRect(0, 0, v.size, v.size, Ports.fill, Ports.red)
+END Restore;
+
+PROCEDURE (v: View) HandlePropMsg (VAR msg: Views.PropMessage);
+BEGIN
+    WITH msg: Properties.SizePref DO
+        IF v.size = 0 THEN v.size := predef[0] END;    (* lazy initialization of size *)
+        msg.w := v.size; msg.h := v.size    (* tell environment about desired width and height *)
+    ELSE    (* ignore other messages *)
+    END
+END HandlePropMsg;
+
+(* notifiers *)
+
+PROCEDURE ClassNotify* (op, from, to: INTEGER);
+BEGIN    (* react to change in data.class *)
+    IF op = Dialog.changed THEN
+        IF (to = beginner) OR (to = advanced) & (data.list.index > 3) THEN
+            (* if class is reduced, make sure that selection contains legal elements *)
+            data.list.index := 0; data.width := predef[0];    (* modify interactor *)
+            Dialog.Update(data)    (* redraw controls where necessary *)
+        END;
+        SetList;
+        Dialog.UpdateList(data.list)    (* reconstruct list box contents *)
+    END
+END ClassNotify;
+
+PROCEDURE ListNotify* (op, from, to: INTEGER);
+BEGIN    (* reacto to change in data.list (index to was selected) *)
+    IF op = Dialog.changed THEN
+        data.width := predef[to];    (* modify interactor *)
+        Dialog.Update(data)    (* redraw controls where necessary *)
+    END
+END ListNotify;
+
+(* guards *)
+
+PROCEDURE ListGuard* (VAR par: Dialog.Par);
+BEGIN    (* disable list box for a beginner *)
+    par.disabled := data.class = beginner
+END ListGuard;
+
+PROCEDURE WidthGuard* (VAR par: Dialog.Par);
+BEGIN    (* make text entry field read-only if user is not guru *)
+    par.readOnly := data.class # guru
+END WidthGuard;
+
+(* commands *)
+
+PROCEDURE Open*;
+    VAR v: View;
+BEGIN
+    NEW(v);    (* create and initialize a new view *)
+    v.size := data.width * Ports.mm;    (* define view's size in function of class *)
+    Views.OpenAux(v, "Example")    (* open the view in a window *)
+END Open;
+
+BEGIN    (* initialization of global variables *)
+    predef[0] := 40; predef[1] := 30; predef[2] := 50;    (* predefined sizes *)
+    predef[3] := 70; predef[4] := 20; predef[5] := 100;
+    data.class := beginner;    (* default values *)
+    data.list.index := 0;
+    data.width := predef[0];
+    SetList
+END ObxControls.

samples/Component Pascal/Example2.cps

@@ -0,0 +1,71 @@
+MODULE ObxFact;
+(**
+    project         = "BlackBox"
+    organization    = "www.oberon.ch"
+    contributors    = "Oberon microsystems"
+    version         = "System/Rsrc/About"
+    copyright       = "System/Rsrc/About"
+    license         = "Docu/BB-License"
+    changes         = ""
+    issues          = ""
+
+**)
+
+IMPORT
+    Stores, Models, TextModels, TextControllers, Integers;
+
+PROCEDURE Read(r: TextModels.Reader; VAR x: Integers.Integer);
+    VAR i, len, beg: INTEGER; ch: CHAR; buf: POINTER TO ARRAY OF CHAR;
+BEGIN
+    r.ReadChar(ch);
+    WHILE ~r.eot & (ch <= " ") DO r.ReadChar(ch) END;
+    ASSERT(~r.eot & (((ch >= "0") & (ch <= "9")) OR (ch = "-")));
+    beg := r.Pos() - 1; len := 0;
+    REPEAT INC(len); r.ReadChar(ch) UNTIL r.eot OR (ch < "0") OR (ch > "9");
+    NEW(buf, len + 1);
+    i := 0; r.SetPos(beg);
+    REPEAT r.ReadChar(buf[i]); INC(i) UNTIL i = len;
+    buf[i] := 0X;
+    Integers.ConvertFromString(buf^, x)
+END Read;
+
+PROCEDURE Write(w: TextModels.Writer; x: Integers.Integer);
+    VAR i: INTEGER;
+BEGIN
+    IF Integers.Sign(x) < 0 THEN w.WriteChar("-") END;
+    i := Integers.Digits10Of(x);
+    IF i # 0 THEN
+        REPEAT DEC(i); w.WriteChar(Integers.ThisDigit10(x, i)) UNTIL i = 0
+    ELSE w.WriteChar("0")
+    END
+END Write;
+
+PROCEDURE Compute*;
+    VAR beg, end, i, n: INTEGER; ch: CHAR;
+        s: Stores.Operation;
+        r: TextModels.Reader; w: TextModels.Writer; attr: TextModels.Attributes;
+        c: TextControllers.Controller;
+        x: Integers.Integer;
+BEGIN
+    c := TextControllers.Focus();
+    IF (c # NIL) & c.HasSelection() THEN
+        c.GetSelection(beg, end);
+        r := c.text.NewReader(NIL); r.SetPos(beg); r.ReadChar(ch);
+        WHILE ~r.eot & (beg < end) & (ch <= " ") DO r.ReadChar(ch); INC(beg) END;
+        IF ~r.eot & (beg < end) THEN
+            r.ReadPrev; Read(r, x);
+            end := r.Pos(); r.ReadPrev; attr :=r.attr;
+            IF (Integers.Sign(x) > 0) & (Integers.Compare(x, Integers.Long(MAX(LONGINT))) <= 0) THEN
+                n := SHORT(Integers.Short(x)); i := 2; x := Integers.Long(1);
+                WHILE i <= n DO x := Integers.Product(x, Integers.Long(i)); INC(i) END;
+                Models.BeginScript(c.text, "computation", s);
+                c.text.Delete(beg, end);
+                w := c.text.NewWriter(NIL); w.SetPos(beg); w.SetAttr(attr);
+                Write(w, x);
+                Models.EndScript(c.text, s)
+            END
+        END
+    END
+END Compute;
+
+END ObxFact.

samples/GAMS/transport.gms

@@ -0,0 +1,76 @@
+*Basic example of transport model from GAMS model library
+
+$Title  A Transportation Problem (TRNSPORT,SEQ=1)
+$Ontext
+
+This problem finds a least cost shipping schedule that meets
+requirements at markets and supplies at factories.
+
+
+Dantzig, G B, Chapter 3.3. In Linear Programming and Extensions.
+Princeton University Press, Princeton, New Jersey, 1963.
+
+This formulation is described in detail in:
+Rosenthal, R E, Chapter 2: A GAMS Tutorial. In GAMS: A User's Guide.
+The Scientific Press, Redwood City, California, 1988.
+
+The line numbers will not match those in the book because of these
+comments.
+
+$Offtext
+
+
+  Sets
+       i   canning plants   / seattle, san-diego /
+       j   markets          / new-york, chicago, topeka / ;
+  Parameters
+       a(i)  capacity of plant i in cases
+         /    seattle     350
+              san-diego   600  /
+       b(j)  demand at market j in cases
+         /    new-york    325
+              chicago     300
+              topeka      275  / ;
+  Table d(i,j)  distance in thousands of miles
+                    new-york       chicago      topeka
+      seattle          2.5           1.7          1.8
+      san-diego        2.5           1.8          1.4  ;
+  Scalar f  freight in dollars per case per thousand miles  /90/ ;
+  Parameter c(i,j)  transport cost in thousands of dollars per case ;
+            c(i,j) = f * d(i,j) / 1000 ;
+  Variables
+       x(i,j)  shipment quantities in cases
+       z       total transportation costs in thousands of dollars ;
+
+  Positive Variable x ;
+
+  Equations
+       cost        define objective function
+       supply(i)   observe supply limit at plant i
+       demand(j)   satisfy demand at market j ;
+
+  cost ..        z  =e=  sum((i,j), c(i,j)*x(i,j)) ;
+
+  supply(i) ..   sum(j, x(i,j))  =l=  a(i) ;
+
+  demand(j) ..   sum(i, x(i,j))  =g=  b(j) ;
+
+  Model transport /all/ ;
+
+  Solve transport using lp minimizing z ;
+
+  Display x.l, x.m ;
+
+$ontext
+#user model library stuff
+Main topic Basic GAMS
+Featured item 1 Trnsport model
+Featured item 2
+Featured item 3
+Featured item 4
+Description
+Basic example of transport model from GAMS model library
+
+
+
+$offtext

samples/GLSL/SimpleLighting.gl2.frag

@@ -0,0 +1,9 @@
+static const char* SimpleFragmentShader = STRINGIFY(
+
+varying vec4 FrontColor;
+
+void main(void)
+{
+    gl_FragColor = FrontColor;
+}
+);

samples/GLSL/myfragment.frg

@@ -0,0 +1,6 @@
+varying vec4 v_color;
+
+void main()
+{
+	gl_FragColor = v_color;
+}

samples/GLSL/myvertex.vrx

@@ -0,0 +1,12 @@
+uniform mat4 u_MVPMatrix;
+
+attribute vec4 a_position;
+attribute vec4 a_color;
+
+varying vec4 v_color;
+
+void main()
+{
+	v_color = a_color;
+	gl_Position =  u_MVPMatrix * pos;
+}

samples/GLSL/recurse1.frag

@@ -0,0 +1,48 @@
+#version 330 core
+
+// cross-unit recursion
+
+void main() {}
+
+// two-level recursion
+
+float cbar(int);
+
+void cfoo(float)
+{
+	cbar(2);
+}
+
+// four-level, out of order
+
+void CB();
+void CD();
+void CA() { CB(); }
+void CC() { CD(); }
+
+// high degree
+
+void CBT();
+void CDT();
+void CAT() { CBT(); CBT(); CBT(); }
+void CCT() { CDT(); CDT(); CBT(); }
+
+// not recursive
+
+void norA() {}
+void norB() { norA(); }
+void norC() { norA(); }
+void norD() { norA(); }
+void norE() { norB(); }
+void norF() { norB(); }
+void norG() { norE(); }
+void norH() { norE(); }
+void norI() { norE(); }
+
+// not recursive, but with a call leading into a cycle if ignoring direction
+
+void norcA() { }
+void norcB() { norcA(); }
+void norcC() { norcB(); }
+void norcD() { norcC(); norcB(); } // head of cycle
+void norcE() { norcD(); } // lead into cycle

samples/Grace/ackerman_function.grace

@@ -0,0 +1,6 @@
+method ack (m : Number, n : Number) -> Number {
+  print "ack {m} {n}"
+  if (m < = 0) then {n + 1}
+   elseif {n <= 0} then {ack((m -1), 1)}
+   else {ack(m -1, ack(m, n-1))}
+}

samples/Grace/grace_IDE.grace

@@ -0,0 +1,554 @@
+import "gtk" as gtk
+import "io" as io
+import "mgcollections" as collections
+import "button_factory" as button_factory
+import "dialog_factory" as dialog_factory
+import "syntax_highlighter" as highlighter
+import "auto_completer" as aComp
+
+//TODO
+
+// Autocomplete typing
+
+// FileChooser
+// Themes
+
+// Details for the Top Level Window
+def window = gtk.window(gtk.GTK_WINDOW_TOPLEVEL)
+window.title := "Grace"
+window.set_default_size(700, 700)
+// -------------
+
+// Placeholder for the console window that can be popped out
+// of the main window
+var popped := gtk.window(gtk.GTK_WINDOW_TOPLEVEL)
+
+// Initialise the Boxes
+def mBox = gtk.box(gtk.GTK_ORIENTATION_VERTICAL, 2)
+def buttonBox = gtk.box(gtk.GTK_ORIENTATION_HORIZONTAL, 2)
+var consoleButtons := gtk.box(gtk.GTK_ORIENTATION_HORIZONTAL, 3)
+var consoleBox := gtk.box(gtk.GTK_ORIENTATION_VERTICAL, 2)
+var editorBox := gtk.box(gtk.GTK_ORIENTATION_VERTICAL, 2)
+var splitPane := gtk.paned(gtk.GTK_ORIENTATION_VERTICAL, 2)
+def menuBox = gtk.box(gtk.GTK_ORIENTATION_HORIZONTAL, 4)
+// -------------
+
+// Initialise the buttons
+def runButton = button_factory.make("run")
+var clearButton := button_factory.make("clear")
+var outButton := button_factory.make("out")
+var errorButton := button_factory.make("error")
+var popButton := button_factory.make("pop")
+def newButton = button_factory.make("new")
+def openButton = button_factory.make("open")
+def saveButton = button_factory.make("save")
+def saveAsButton = button_factory.make("saveAs")
+def closeButton = button_factory.make("close")
+// -------------
+
+// Details for the default text editor and scrolled window
+var tEdit := gtk.text_view
+tEdit.set_size_request(700, 400)
+
+var scrolled_main := gtk.scrolled_window
+scrolled_main.set_size_request(700, 400)
+scrolled_main.add(tEdit)
+// -------------
+
+// Widget that allows multiple files to be edited (tabs)
+var notebook := gtk.notebook
+notebook.scrollable := true
+// -------------
+
+// Maps for holding the text_views and scrolled_windows
+var editor_map := collections.map.new
+editor_map.put(0, tEdit)
+var scrolled_map := collections.map.new
+scrolled_map.put(0, scrolled_main)
+
+// -------------
+
+// Class that manages the syntax highlighting (This needs to be passed around otherwise
+// the text_tag table gets confused, ie there can only be one)
+def lighter = highlighter.Syntax_Highlighter.new(notebook, editor_map)
+tEdit.buffer.on "changed" do {
+    lighter.highlightLine
+}
+
+// Class that manages any auto completion that is required
+def completer =  aComp.Auto_Completer.new(window, notebook, editor_map)
+
+// Utility methods
+// -------------
+
+method deleteCompileFiles(page_num : Number) {
+    def cur_scrolled = scrolled_map.get(page_num)
+    var filename := notebook.get_tab_label_text(cur_scrolled)
+    filename := filename.substringFrom(0)to(filename.size - 7) //Removes .grace extension
+
+    io.system("rm -f files/" ++ filename)
+    io.system("rm -f files/" ++ filename ++ ".c")
+    io.system("rm -f files/" ++ filename ++ ".gcn")
+    io.system("rm -f files/" ++ filename ++ ".gct")
+}
+
+// -------------
+
+
+
+var currentConsole := "output"      // Which console is being shown
+var out := false
+
+
+var outText := ""
+var errorText := ""
+
+
+
+// Give actions to the buttons
+// -------------
+
+runButton.on "clicked" do {
+    clearConsoles()
+
+    // Get the details for the current page selected
+    def cur_page_num = notebook.current_page
+    def cur_page = editor_map.get(cur_page_num)
+    def cur_scrolled = scrolled_map.get(cur_page_num)
+    def cur_page_label = notebook.get_tab_label_text(cur_scrolled)
+
+    // Initialise text iterators
+    def sIter = gtk.text_iter
+    def eIter = gtk.text_iter
+
+    // Set one at the beggining and one at the end of the text
+    cur_page.buffer.get_iter_at_offset(sIter, 0)
+    cur_page.buffer.get_iter_at_offset(eIter, -1)
+
+    // Get the text between the text iterators
+    def text = cur_page.buffer.get_text(sIter, eIter, true)
+
+    // Save the text to the file (in case the user hasn't already saved it)
+    def file = io.open("files/" ++ cur_page_label, "w")
+    file.write(text)
+    file.close
+
+    // Run the program and pipe the output and errors into files to be read
+    io.system("../minigrace/minigrace " ++ "files/" ++ cur_page_label ++ " > output.txt 2> error.txt")
+    def outputFile = io.open("output.txt", "r")
+    def errorFile = io.open("error.txt", "r")
+    outText := outputFile.read
+    errorText := errorFile.read
+
+    io.system("rm -f output.txt error.txt")
+
+    var switched := false
+
+    // Change the console to output if there is output text
+    if((outText.size > 0) && (currentConsole != "output")) then {
+        switch_to_output()
+        switched := true
+    }
+    // Change the console to errors if there were errors
+    if((errorText.size > 0) && (currentConsole != "errors")) then {
+        switch_to_errors()
+        switched := true
+    }
+
+    // Remember to populate the console if it wasn't switched
+    if(!switched) then {
+        populateConsoles
+    }
+}
+
+clearButton.on "clicked" do {
+    clearConsoles()
+}
+
+outButton.on "clicked" do {
+    switch_to_output()
+}
+
+errorButton.on "clicked" do {
+    switch_to_errors()
+}
+
+popButton.on "clicked" do {
+    if(out) then {
+        popIn()
+    } else {
+        popOut()
+    }
+}
+
+// Gives a dialog to let the user create a new file to edit
+newButton.on "clicked" do {
+    def new_window_class = dialog_factory.new.new(notebook, editor_map, scrolled_map, lighter)
+
+    def new_window = new_window_class.window()
+    new_window.show_all
+}
+
+// Gives a dialog that lets the user open a file to edit
+openButton.on "clicked" do {
+    def open_window_class = dialog_factory.open.new(notebook, editor_map, scrolled_map, lighter)
+
+    def open_window = open_window_class.window()
+    open_window.show_all
+}
+
+// Saves the current file (if the name is Untitled.grace it will ask for a new name)
+saveButton.on "clicked" do {
+    def cur_page_num = notebook.current_page
+    def cur_page = editor_map.get(cur_page_num)
+    def cur_scrolled = scrolled_map.get(cur_page_num)
+    def cur_page_label = notebook.get_tab_label_text(cur_scrolled)
+
+    if(cur_page_label == "Untitled.grace") then {
+        def saveAs_window_class = dialog_factory.save.new(notebook, editor_map, scrolled_map, true)
+
+        def saveAs_window = saveAs_window_class.window()
+        saveAs_window.show_all
+    } else {
+        // Initialise text iterators
+        def sIter = gtk.text_iter
+        def eIter = gtk.text_iter
+
+        // Set one at the beggining and one at the end of the text
+        cur_page.buffer.get_iter_at_offset(sIter, 0)
+        cur_page.buffer.get_iter_at_offset(eIter, -1)
+
+        // Get the text between the text iterators
+        def text = cur_page.buffer.get_text(sIter, eIter, true)
+
+        // Save the file
+        def file = io.open("files/" ++ cur_page_label, "w")
+        file.write(text)
+        file.close
+    }
+
+}
+
+// Gives a dialog that lets the user save the file with a new name
+saveAsButton.on "clicked" do {
+    def saveAs_window_class = dialog_factory.save.new(notebook, editor_map, scrolled_map, false)
+
+    def saveAs_window = saveAs_window_class.window()
+    saveAs_window.show_all
+}
+
+// This will close a tab on the notebook
+// It also "removes" the page from the map,
+// by creating a new temporary map and putting all but
+// the removed page in.
+closeButton.on "clicked" do {
+    def page_num = notebook.current_page
+    def num_pages = notebook.n_pages
+
+    if(num_pages > 1) then {
+        deleteCompileFiles(page_num)
+
+        def e_map = collections.map.new
+        def s_map = collections.map.new
+
+        // Copy every page up to the current page into the new maps
+        var x := 0
+        while {x < page_num} do {
+            var eValue := editor_map.get(x)
+            var sValue := scrolled_map.get(x)
+            e_map.put(x, eValue)
+            s_map.put(x, sValue)
+
+            x := x + 1
+        }
+
+        // Copy every page after the current page into the new map (shifted one down)
+        x := page_num + 1
+        while {x < num_pages} do {
+            var eValue := editor_map.get(x)
+            var sValue := scrolled_map.get(x)
+            e_map.put((x - 1), eValue)
+            s_map.put((x - 1), sValue)
+
+            x := x + 1
+        }
+
+        editor_map := e_map
+        scrolled_map := s_map
+        notebook.remove_page(page_num)
+
+        notebook.show_all
+    }
+
+}
+// -------------
+
+
+
+
+
+
+// Consoles:
+// -------------
+
+var outConsole := gtk.text_view
+var outScroll := gtk.scrolled_window
+var errorConsole := gtk.text_view
+var errorScroll := gtk.scrolled_window
+var errorTag := errorConsole.buffer.create_tag("fixed", "foreground", "red")
+
+
+// Creates a new output console
+method createOut {
+    outConsole := gtk.text_view
+    outScroll := gtk.scrolled_window
+    outScroll.add(outConsole)
+    if(out) then {
+        outConsole.set_size_request(400, 400)
+        outScroll.set_size_request(400, 400)
+    } else {
+        outConsole.set_size_request(700, 200)
+        outScroll.set_size_request(700, 200)
+    }
+    outConsole.editable := false
+    outConsole.buffer.set_text("[Output]:", -1)
+}
+createOut()
+
+// Creates a new error console
+method createError {
+    errorConsole := gtk.text_view
+    errorScroll := gtk.scrolled_window
+    errorScroll.add(errorConsole)
+    if(out) then {
+        errorConsole.set_size_request(400, 400)
+        errorScroll.set_size_request(400, 400)
+    } else {
+        errorConsole.set_size_request(700, 200)
+        errorScroll.set_size_request(700, 200)
+    }
+    errorConsole.editable := false
+    errorConsole.buffer.set_text("[Errors]:", -1)
+    errorTag := errorConsole.buffer.create_tag("fixed", "foreground", "red")
+}
+createError()
+
+// Switches the console being shown to be output. This requires
+// the output console to be remade as it would have been destroyed when
+// it was switched previously
+method switch_to_output {
+    if(currentConsole != "output") then {
+        currentConsole := "output"
+        consoleBox.remove(errorScroll)     // This destroys the errorConsole
+
+        createOut()
+
+        consoleBox.add(outScroll)
+
+        populateConsoles()
+        if(out) then {
+            popped.show_all
+        } else {
+            window.show_all
+        }
+    }
+}
+
+// Switches the console being shown to be errors. This requires
+// the error console to be remade as it would have been destroyed when
+// it was switched previously
+method switch_to_errors {
+    if(currentConsole != "errors") then {
+        currentConsole := "errors"
+        consoleBox.remove(outScroll)       // This destroys the outConsole
+
+        createError()
+
+        consoleBox.add(errorScroll)
+
+        populateConsoles()
+        if(out) then {
+            popped.show_all
+        } else {
+            window.show_all
+        }
+    }
+}
+
+// If there is text to be put into the consoles this will add it
+method populateConsoles {
+    if((outText.size > 0) && (currentConsole == "output")) then {
+        outConsole.buffer.set_text(outText, -1)
+    }
+    if((errorText.size > 0) && (currentConsole == "errors")) then {
+        def sIter = gtk.text_iter
+        def eIter = gtk.text_iter
+
+        errorConsole.buffer.set_text(errorText, -1)
+        errorConsole.buffer.get_iter_at_offset(sIter, 0)
+        errorConsole.buffer.get_iter_at_offset(eIter, -1)
+        errorConsole.buffer.apply_tag(errorTag, sIter, eIter)
+    }
+}
+
+method clearConsoles {
+    if(currentConsole == "output") then {
+        outConsole.buffer.set_text("[Output]:", -1)
+        outText := ""
+    }
+    if(currentConsole == "errors") then {
+        errorConsole.buffer.set_text("[Errors]:", -1)
+        errorText := ""
+    }
+}
+
+
+// Identical as the popIn method, but can be connected to the window's destroy button
+def popInBlock = {
+    consoleBox.reparent(splitPane)
+    popButton.label := "Pop Out"
+
+    if(currentConsole == "output") then {
+        outConsole.set_size_request(700, 200)
+        outScroll.set_size_request(700, 200)
+    }
+    if(currentConsole == "errors") then {
+     errorConsole.set_size_request(700, 200)
+     errorScroll.set_size_request(700, 200)
+    }
+
+    def cur_page_num = notebook.current_page
+    def cur_scrolled = scrolled_map.get(cur_page_num)
+    def cur_page = editor_map.get(cur_page_num)
+
+    cur_page.set_size_request(700, 400)
+    cur_scrolled.set_size_request(700, 400)
+
+    out := false
+    popped.visible := false
+}
+
+
+// This pops the console out into a separate window
+method popOut {
+    popped := gtk.window(gtk.GTK_WINDOW_TOPLEVEL)
+
+    consoleBox.reparent(popped)
+    popButton.label := "Pop In"
+
+    if(currentConsole == "output") then {
+        outConsole.set_size_request(400, 400)
+        outScroll.set_size_request(400, 400)
+    }
+    if(currentConsole == "errors") then {
+        errorConsole.set_size_request(400, 400)
+        errorScroll.set_size_request(400, 400)
+    }
+
+    def cur_page_num = notebook.current_page
+    def cur_scrolled = scrolled_map.get(cur_page_num)
+    def cur_page = editor_map.get(cur_page_num)
+
+    cur_page.set_size_request(700, 580)
+    cur_scrolled.set_size_request(700, 580)
+
+    out := true
+    popped.visible := true
+    popped.connect("destroy", popInBlock)
+    popped.show_all
+
+}
+
+// Puts the console back into the main window
+method popIn {
+    consoleBox.reparent(splitPane)
+    popButton.label := "Pop Out"
+
+    if(currentConsole == "output") then {
+        outConsole.set_size_request(700, 200)
+        outScroll.set_size_request(700, 200)
+    }
+    if(currentConsole == "errors") then {
+        errorConsole.set_size_request(700, 200)
+        errorScroll.set_size_request(700, 200)
+    }
+
+    def cur_page_num = notebook.current_page
+    def cur_scrolled = scrolled_map.get(cur_page_num)
+    def cur_page = editor_map.get(cur_page_num)
+
+    cur_page.set_size_request(700, 400)
+    cur_scrolled.set_size_request(700, 400)
+
+    out := false
+    popped.visible := false
+}
+
+clearConsoles()
+// -------------
+
+
+
+
+
+
+// Patch everything together
+
+var hSeparator1 := gtk.separator(gtk.GTK_ORIENTATION_HORIZONTAL)
+var hSeparator2 := gtk.separator(gtk.GTK_ORIENTATION_HORIZONTAL)
+
+menuBox.add(newButton)
+menuBox.add(openButton)
+menuBox.add(saveButton)
+menuBox.add(saveAsButton)
+buttonBox.add(runButton)
+buttonBox.add(closeButton)
+
+consoleButtons.add(outButton)
+consoleButtons.add(errorButton)
+consoleButtons.add(clearButton)
+consoleButtons.add(popButton)
+
+consoleBox.add(hSeparator1)
+consoleBox.add(consoleButtons)
+consoleBox.add(outScroll)
+
+editorBox.add(hSeparator2)
+notebook.add(scrolled_main)
+notebook.set_tab_label_text(scrolled_main, "Untitled.grace")
+editorBox.add(notebook)
+
+splitPane.add1(editorBox)
+splitPane.add2(consoleBox)
+
+mBox.add(menuBox)
+mBox.add(buttonBox)
+mBox.add(splitPane)
+
+window.add(mBox)
+
+def exit = {
+    var x := 0
+    while {x < notebook.n_pages} do {
+        deleteCompileFiles(x)
+
+        x := x + 1
+    }
+
+    // Delete the compile files of the IDE
+    io.system("rm -f Grace_IDE.gct Grace_IDE.c Grace_IDE.gcn")
+    io.system("rm -f scanner.gct scanner.c scanner.gcn")
+    io.system("rm -f syntax_highlighter.gct syntax_highlighter.c syntax_highlighter.gcn")
+    io.system("rm -f syntax_colors.gct syntax_colors.c syntax_colors.gcn")
+    io.system("rm -f button_factory.gct button_factory.c button_factory.gcn")
+    io.system("rm -f dialog_factory.gct dialog_factory.c dialog_factory.gcn")
+    io.system("rm -f auto_completer.gct auto_completer.c auto_completer.gcn")
+
+    print "Grace IDE Closed Successfully"
+    gtk.main_quit
+}
+
+window.connect("destroy", exit)
+window.show_all
+
+gtk.main

samples/Groovy/script.gvy

@@ -0,0 +1,2 @@
+#!/usr/bin/env groovy
+println "Hello World"

samples/Groovy/template.grt

@@ -0,0 +1,9 @@
+html {
+  head {
+    component "bootstrap"
+    title "Bootstrap Template"
+  }
+  
+  html {
+  }
+}

samples/Groovy/template.gtpl

@@ -0,0 +1,9 @@
+html {
+  head {
+    title "Example Template"
+  }
+  
+  body {
+    p "This is a quick template example"
+  }
+}

samples/HTML/ApiOverviewPage.st

@@ -0,0 +1,60 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd">
+<html>
+<head>
+$Common_meta()$
+<title>
+Android API Differences Report
+</title>
+<body>
+<div class="body">
+
+$Header()$
+
+
+<div class="content">
+<h2>Android API Differences Report</h2>
+<p>This document details the changes in the Android framework API. It shows 
+additions, modifications, and removals for packages, classes, methods, and 
+fields. Each reference to an API change includes a brief description of the 
+API and an explanation of the change and suggested workaround, where available.</p>
+
+<p>The differences described in this report are based a comparison of the APIs 
+whose versions are specified in the upper-right corner of this page. It compares a 
+newer "to" API to an older "from" version, noting any changes relative to the 
+older API. So, for example, indicated API removals are no longer present in the "to" 
+API.</p>
+<p>For more information about the Android framework API and SDK, 
+see the <a href="http://code.google.com/android/index.html" target="_top">Android product site</a>.</p>
+
+$if(no_delta)$
+<h3>Congratulation!</h3>
+No differences were detected between the two provided APIs.
+$endif$
+
+
+$if(removed_packages)$
+$Table(name="Removed Packages", rows=removed_packages:{$it.from:ModelElementRow()$})$
+<br/>
+$endif$
+
+
+$if(added_packages)$
+$Table(name="Added Packages", rows=added_packages:{$it.to:PackageAddedLink()$}:SimpleTableRow())$
+<br/>
+$endif$
+
+$if(changed_packages)$
+$Table(name="Changed Packages", rows=changed_packages:{$it.to:PackageChangedLink()$}:SimpleTableRow())$
+<br/>
+$endif$
+</div>
+
+
+</div>
+</body>
+</html>
+
+
+
+
+

samples/HTML/pages.html

@@ -0,0 +1,31 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
+<title>Related Pages</title>
+<link href="qt.css" rel="stylesheet" type="text/css"/>
+</head>
+<body>
+<div class=header>
+<a class=headerLink  href="index.html">Main Page</a> &middot;
+<a class=headerLink  href="classoverview.html">Class Overview</a> &middot;
+<a class=headerLink  href="hierarchy.html">Hierarchy</a> &middot;
+<a class=headerLink  href="annotated.html">All Classes</a>
+</div>
+<!-- Generated by Doxygen 1.8.1.2 -->
+</div><!-- top -->
+<div class="header">
+  <div class="headertitle">
+<div class="title">Related Pages</div>  </div>
+</div><!--header-->
+<div class="contents">
+<div class="textblock">Here is a list of all related documentation pages:</div><div class="directory">
+<table class="directory">
+<tr id="row_0_" class="even"><td class="entry"><img src="ftv2node.png" alt="o" width="16" height="22" /><a class="el" href="classoverview.html" target="_self">Class Overview</a></td><td class="desc"></td></tr>
+<tr id="row_1_"><td class="entry"><img src="ftv2lastnode.png" alt="\" width="16" height="22" /><a class="el" href="thelayoutsystem.html" target="_self">The Layout System</a></td><td class="desc"></td></tr>
+</table>
+</div><!-- directory -->
+</div><!-- contents -->
+<div class="footer" />Generated with <a href="http://www.doxygen.org/index.html">Doxygen</a> 1.8.1.2</div>
+</body>
+</html>

samples/Haskell/Hello.hs

@@ -0,0 +1,6 @@
+import Data.Char
+
+main :: IO ()
+main = do
+	let hello = "hello world"
+	putStrLn $ map toUpper hello

samples/Haskell/Main.hs

@@ -0,0 +1,33 @@
+module Main where
+
+import Sudoku
+import Data.Maybe
+
+
+sudoku :: Sudoku
+sudoku = [8, 0, 1, 3, 4, 0, 0, 0, 0,
+          4, 3, 0, 8, 0, 0, 1, 0, 7,
+          0, 0, 0, 0, 6, 0, 0, 0, 3,
+          2, 0, 8, 0, 5, 0, 0, 0, 9,
+          0, 0, 9, 0, 0, 0, 7, 0, 0,
+          6, 0, 0, 0, 7, 0, 8, 0, 4,
+          3, 0, 0, 0, 1, 0, 0, 0, 0,
+          1, 0, 5, 0, 0, 6, 0, 4, 2,
+          0, 0, 0, 0, 2, 4, 3, 0, 8]
+
+{-
+sudoku :: Sudoku
+sudoku = [8, 6, 1, 3, 4, 7, 2, 9, 5,
+		  4, 3, 2, 8, 9, 5, 1, 6, 7,
+		  9, 5, 7, 1, 6, 2, 4, 8, 3,
+		  2, 7, 8, 4, 5, 1, 6, 3, 9,
+		  5, 4, 9, 6, 8, 3, 7, 2, 1,
+		  6, 1, 3, 2, 7, 9, 8, 5, 4,
+		  3, 2, 4, 9, 1, 8, 5, 7, 6,
+		  1, 8, 5, 7, 3, 6, 9, 4, 2,
+		  7, 9, 6, 5, 2, 4, 3, 1, 8]
+-}
+main :: IO ()
+main = do
+	putStrLn $ pPrint sudoku ++ "\n\n"
+	putStrLn $ pPrint $ fromMaybe [] $ solve sudoku

samples/Haskell/Sudoku.hs

@@ -0,0 +1,46 @@
+module Sudoku
+(
+  Sudoku,
+  solve,
+  isSolved,
+  pPrint
+) where
+
+import Data.Maybe
+import Data.List
+import Data.List.Split
+
+type Sudoku = [Int]
+
+solve :: Sudoku -> Maybe Sudoku
+solve sudoku
+  | isSolved sudoku = Just sudoku
+  | otherwise = do
+    index <- elemIndex 0 sudoku
+    let sudokus = [nextTest sudoku index i | i <- [1..9],
+                                  checkRow (nextTest sudoku index i) index,
+                                  checkColumn (nextTest sudoku index i) index,
+                                  checkBox (nextTest sudoku index i) index]
+    listToMaybe $ mapMaybe solve sudokus
+  where nextTest sudoku index i = take index sudoku ++ [i] ++ drop (index+1) sudoku
+        checkRow sudoku index = (length $ getRow sudoku index) == (length $ nub $ getRow sudoku index)
+        checkColumn sudoku index = (length $ getColumn sudoku index) == (length $ nub $ getColumn sudoku index)
+        checkBox sudoku index = (length $ getBox sudoku index) == (length $ nub $ getBox sudoku index)
+        getRow sudoku index = filter (/=0) $ (chunksOf 9 sudoku) !! (quot index 9)
+        getColumn sudoku index = filter (/=0) $ (transpose $ chunksOf 9 sudoku) !! (mod index 9)
+        getBox sudoku index = filter (/=0) $ (map concat $ concatMap transpose $ chunksOf 3 $ map (chunksOf 3) $ chunksOf 9 sudoku)
+                                                                                !! (3 * (quot index 27) + (quot (mod index 9) 3))
+
+isSolved :: Sudoku -> Bool
+isSolved sudoku
+  | product sudoku == 0 = False
+  | map (length . nub) sudokuRows /= map length sudokuRows = False
+  | map (length . nub) sudokuColumns /= map length sudokuColumns = False
+  | map (length . nub) sudokuBoxes /= map length sudokuBoxes = False
+  | otherwise = True
+  where sudokuRows = chunksOf 9 sudoku
+        sudokuColumns = transpose sudokuRows
+        sudokuBoxes = map concat $ concatMap transpose $ chunksOf 3 $ map (chunksOf 3) $ chunksOf 9 sudoku
+
+pPrint :: Sudoku -> String
+pPrint sudoku = intercalate "\n" $ map (intercalate " " . map show) $ chunksOf 9 sudoku

samples/Isabelle/HelloWorld.thy

@@ -0,0 +1,46 @@
+theory HelloWorld
+imports Main
+begin
+
+section{*Playing around with Isabelle*}
+
+text{* creating a lemma with the name hello_world*}
+lemma hello_world: "True" by simp
+
+(*inspecting it*)
+thm hello_world
+
+text{* defining a string constant HelloWorld *}
+
+definition HelloWorld :: "string" where
+  "HelloWorld \<equiv> ''Hello World!''"
+
+(*reversing HelloWorld twice yilds HelloWorld again*)
+theorem "rev (rev HelloWorld) = HelloWorld"
+  by (fact List.rev_rev_ident)
+
+text{*now we delete the already proven List.rev_rev_ident lema and show it by hand*}
+declare List.rev_rev_ident[simp del]
+hide_fact List.rev_rev_ident
+
+(*It's trivial since we can just 'execute' it*)
+corollary "rev (rev HelloWorld) = HelloWorld"
+  apply(simp add: HelloWorld_def)
+  done
+
+text{*does it hold in general?*}
+theorem rev_rev_ident:"rev (rev l) = l"
+  proof(induction l)
+  case Nil thus ?case by simp
+  next
+  case (Cons l ls)
+    assume IH: "rev (rev ls) = ls"
+    have "rev (l#ls) = (rev ls) @ [l]" by simp
+    hence "rev (rev (l#ls)) = rev ((rev ls) @ [l])" by simp
+    also have "\<dots> = [l] @ rev (rev ls)" by simp
+    finally show "rev (rev (l#ls)) = l#ls" using IH by simp
+  qed
+
+corollary "\<forall>(l::string). rev (rev l) = l" by(fastforce intro: rev_rev_ident)
+
+end

samples/JavaScript/helloHanaEndpoint.xsjs

@@ -0,0 +1,24 @@
+/*
+ invoke endpoint by calling in a browser:
+ http://<hanaserveradress>:<xsengineport(usually 8000)>/<path>/<to>/<endpoint>/helloHanaMath.xsjslib?x=4&y=2
+ e.g.:
+ http://192.168.178.20:8000/geekflyer/linguist/helloHanaEndpoint.xsjs?x=4&y=2
+ */
+
+var hanaMath = $.import("./helloHanaMath.xsjslib");
+
+var x = parseFloat($.request.parameters.get("x"));
+var y = parseFloat($.request.parameters.get("y"));
+
+
+var result = hanaMath.multiply(x, y);
+
+var output = {
+    title: "Hello HANA XS - do some simple math",
+    input: {x: x, y: y},
+    result: result
+};
+
+$.response.contentType = "application/json";
+$.response.statusCode = $.net.http.OK;
+$.response.setBody(JSON.stringify(output));

samples/JavaScript/helloHanaMath.xsjslib

@@ -0,0 +1,9 @@
+/* simple hana xs demo library, which can be used by multiple endpoints */
+
+function multiply(x, y) {
+    return x * y;
+}
+
+function add(x, y) {
+    return x + y;
+}

samples/JavaScript/intro.js.frag

@@ -0,0 +1,7 @@
+(function(window, angular) {
+
+Array.prototype.last = function() {
+    return this[this.length-1];
+};
+
+var app = angular.module('ConwayGameOfLife', []);

samples/JavaScript/outro.js.frag

@@ -0,0 +1,3 @@
+
+})(window, window.angular);
+

samples/Liquid/layout.liquid

@@ -0,0 +1,104 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+  <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
+  <title>{{shop.name}} - {{page_title}}</title>
+
+  {{ 'textile.css'  | global_asset_url | stylesheet_tag }}
+  {{ 'lightbox/v204/lightbox.css' | global_asset_url | stylesheet_tag }}
+
+  {{ 'prototype/1.6/prototype.js' | global_asset_url  | script_tag }}
+  {{ 'scriptaculous/1.8.2/scriptaculous.js' | global_asset_url  | script_tag }}
+  {{ 'lightbox/v204/lightbox.js'  | global_asset_url  | script_tag }}
+  {{ 'option_selection.js'        | shopify_asset_url | script_tag }}
+
+  {{ 'layout.css'   | asset_url | stylesheet_tag }}
+  {{ 'shop.js'      | asset_url | script_tag }}
+
+  {{ content_for_header }}
+</head>
+
+<body id="page-{{template}}">
+
+  <p class="hide"><a href="#rightsiders">Skip to navigation.</a></p>
+    <!-- mini cart -->
+        {% if cart.item_count > 0 %}
+      <div id="minicart" style="display:none;"><div id="minicart-inner">
+      <div id="minicart-items">
+      <h2>There {{ cart.item_count | pluralize: 'is', 'are' }} {{ cart.item_count }} {{ cart.item_count | pluralize: 'item', 'items' }} in <a href="/cart" title="View your cart">your cart</a>!</h2><h4 style="font-size: 16px; margin: 0 0 10px 0; padding: 0;">Your subtotal is {{ cart.total_price | money }}.</h4>
+        {% for item in cart.items %}
+        <div class="thumb">
+          <div class="prodimage"><a href="{{item.product.url}}" onMouseover="tooltip('{{ item.quantity }} x {{ item.title }} ({{ item.variant.title }})', 200)"; onMouseout="hidetooltip()"><img src="{{ item.product.featured_image | product_img_url: 'thumb' }}" /></a></div>
+        </div>
+        {% endfor %}
+        </div>
+       <br style="clear:both;" />
+      </div></div>
+        {% endif %}
+
+  <div id="container">
+    <div id="header">
+      <!-- Begin Header -->
+        <h1 id="logo"><a href="/" title="Go Home">{{shop.name}}</a></h1>
+      <div id="cartlinks">
+        {% if cart.item_count > 0 %}
+          <h2 id="cartcount"><a href="/cart" onMouseover="tooltip('There {{ cart.item_count | pluralize: 'is', 'are' }} {{ cart.item_count }} {{ cart.item_count | pluralize: 'item', 'items' }} in your cart!', 200)"; onMouseout="hidetooltip()">{{ cart.item_count }} {{ cart.item_count | pluralize: 'thing', 'things' }}!</a></h2>
+      <a href="/cart" id="minicartswitch" onclick="superSwitch(this, 'minicart', 'Close Mini Cart'); return false;" id="cartswitch">View Mini Cart ({{ cart.total_price | money }})</a>
+        {% endif %}
+      </div>
+      <!-- End Header -->
+
+    </div>
+  <hr />
+<div id="main">
+
+    <div id="content">
+    <div id="innercontent">
+      {{ content_for_layout }}
+      </div>
+    </div>
+
+  <hr />
+    <div id="rightsiders">
+
+      <ul class="rightlinks">
+        {% for link in linklists.main-menu.links %}
+           <li>{{ link.title | link_to: link.url }}</li>
+        {% endfor %}
+      </ul>
+
+        {% if tags %}
+        <ul class="rightlinks">
+          {% for tag in collection.tags %}
+            <li><span class="add-link">{{ '+' | link_to_add_tag: tag }}</span>{{ tag | highlight_active_tag | link_to_tag: tag }}</li>
+          {% endfor %}
+        </ul>
+        {% endif %}
+
+      <ul class="rightlinks">
+        {% for link in linklists.footer.links %}
+           <li>{{ link.title | link_to: link.url }}</li>
+        {% endfor %}
+      </ul>
+
+    </div>
+
+  <hr /><br style="clear:both;" />
+
+    <div id="footer">
+      <div class="footerinner">
+      All prices are in {{ shop.currency }}.
+      Powered by <a href="http://www.shopify.com" title="Shopify, Hosted E-Commerce">Shopify</a>.
+    </div>
+    </div>
+
+  </div>
+</div>
+
+<div id="tooltip"></div>
+<img id="pointer" src="{{ 'arrow2.gif' | asset_url }}" />
+
+</body>
+</html>

samples/Liquid/template.liquid

@@ -0,0 +1,70 @@
+<h3>We have wonderful products!</h3>
+<ul id="products">
+  <div id="productpage">
+    <div id="productimages"><div id="productimages-top"><div id="productimages-bottom">
+      {% for image in product.images %}
+        {% if forloop.first %}
+          <a href="{{ image | product_img_url: 'large' }}" class="productimage" rel="lightbox">
+            <img src="{{ image | product_img_url: 'medium'}}" alt="{{product.title | escape }}" />
+          </a>
+        {% else %}
+          <a href="{{ image | product_img_url: 'large' }}" class="productimage-small" rel="lightbox">
+            <img src="{{ image | product_img_url: 'small'}}" alt="{{product.title | escape }}" />
+          </a>
+        {% endif %}
+      {% endfor %}
+    </div></div></div>
+
+    <h2>{{ product.title }}</h2>
+
+    <ul id="details" class="hlist">
+      <li>Vendor: {{ product.vendor | link_to_vendor }}</li>
+      <li>Type: {{ product.type | link_to_type }}</li>
+    </ul>
+
+    <small>{{ product.price_min | money }}{% if product.price_varies %} - {{ product.price_max | money }}{% endif %}</small>
+
+    <div id="variant-add">
+      <form action="/cart/add" method="post">
+
+        <select id="variant-select" name="id" class="product-info-options">
+          {% for variant in product.variants %}
+            <option value="{{ variant.id }}">{{ variant.title }} - {{ variant.price | money }}</option>
+          {% endfor %}
+        </select>
+
+        <div id="price-field" class="price"></div>
+
+      <div style="text-align:center;"><input type="image" name="add" value="Add to Cart" id="add" src="{{ 'addtocart.gif' | asset_url }}" /></div>
+      </form>
+    </div>
+
+    <div class="description textile">
+      {{ product.description }}
+    </div>
+  </div>
+
+  <script type="text/javascript">
+  <!--
+    // prototype callback for multi variants dropdown selector
+    var selectCallback = function(variant, selector) {
+      if (variant && variant.available == true) {
+        // selected a valid variant
+        $('add').removeClassName('disabled'); // remove unavailable class from add-to-cart button
+        $('add').disabled = false;           // reenable add-to-cart button
+        $('price-field').innerHTML = Shopify.formatMoney(variant.price, "{{shop.money_with_currency_format}}");  // update price field
+      } else {
+        // variant doesn't exist
+        $('add').addClassName('disabled');      // set add-to-cart button to unavailable class
+        $('add').disabled = true;              // disable add-to-cart button
+        $('price-field').innerHTML = (variant) ? "Sold Out" : "Unavailable"; // update price-field message
+      }
+    };
+
+    // initialize multi selector for product
+    Event.observe(document, 'dom:loaded', function() {
+      new Shopify.OptionSelectors("variant-select", { product: {{ product | json }}, onVariantSelected: selectCallback });
+    });
+  -->
+  </script>
+</ul>

samples/Mathematica/MiscCalculations.nb

@@ -0,0 +1,232 @@
+(* Content-type: application/vnd.wolfram.mathematica *)
+
+(*** Wolfram Notebook File ***)
+(* http://www.wolfram.com/nb *)
+
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+
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+NotebookFileLineBreakTest
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+WindowFrame->Normal*)
+
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+
+(* Internal cache information *)
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+*)
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+*)
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+}
+]
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+
+(* End of internal cache information *)

samples/Mathematica/Problem12.m

@@ -0,0 +1,8 @@
+(* ::Package:: *)
+
+(* Problem12.m *)
+(* Author: William Woodruff *)
+(* Problem: What is the value of the first triangle number to have over five hundred divisors? *)
+
+Do[If[Length[Divisors[Binomial[i + 1, 2]]] > 500, 
+  Print[Binomial[i + 1, 2]]; Break[]], {i, 1000000}]

samples/Nit/calculator.nit

@@ -0,0 +1,272 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2013 Alexis Laferrière <alexis.laf@xymus.net>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import gtk
+
+class CalculatorContext
+	var result : nullable Float = null
+
+	var last_op : nullable Char = null
+
+	var current : nullable Float = null
+	var after_point : nullable Int = null
+
+	fun push_op( op : Char )
+	do
+		apply_last_op_if_any
+		if op == 'C' then
+			self.result = 0.0
+			last_op = null
+		else
+			last_op = op # store for next push_op
+		end
+
+		# prepare next current
+		after_point = null
+		current = null
+	end
+
+	fun push_digit( digit : Int )
+	do
+		var current = current
+		if current == null then current = 0.0
+
+		var after_point = after_point
+		if after_point == null then
+			current = current * 10.0 + digit.to_f
+		else
+			current = current + digit.to_f * 10.0.pow(after_point.to_f)
+			self.after_point -= 1
+		end
+
+		self.current = current
+	end
+
+	fun switch_to_decimals
+	do
+		if self.current == null then current = 0.0
+		if after_point != null then return
+
+		after_point = -1
+	end
+
+	fun apply_last_op_if_any
+	do
+		var op = last_op
+
+		var result = result
+		if result == null then result = 0.0
+
+		var current = current
+		if current == null then current = 0.0
+
+		if op == null then
+			result = current
+		else if op == '+' then
+			result = result + current
+		else if op == '-' then
+			result = result - current
+		else if op == '/' then
+			result = result / current
+		else if op == '*' then
+			result = result * current
+		end
+		self.result = result
+		self.current = null
+	end
+end
+
+class CalculatorGui
+	super GtkCallable
+
+	var win : GtkWindow
+	var container : GtkGrid
+
+	var lbl_disp : GtkLabel
+	var but_eq : GtkButton
+	var but_dot : GtkButton
+
+	var context = new CalculatorContext
+
+	redef fun signal( sender, user_data )
+	do
+		var after_point = context.after_point
+		if after_point == null then 
+		    after_point = 0
+		else
+		    after_point = (after_point.abs)
+		end
+		
+		if user_data isa Char then # is an operation
+			var c = user_data
+			if c == '.' then
+				but_dot.sensitive= false
+				context.switch_to_decimals
+				lbl_disp.text = "{context.current.to_i}."
+			else
+				but_dot.sensitive= true
+				context.push_op( c )
+				
+				var s = context.result.to_precision_native(6)
+				var index : nullable Int = null
+				for i in s.length.times do
+				    var chiffre = s.chars[i]
+				    if chiffre == '0' and index == null then
+					index = i
+				    else if chiffre != '0' then
+					index = null
+				    end
+				end
+				if index != null then
+					s = s.substring(0, index)
+					if s.chars[s.length-1] == ',' then s = s.substring(0, s.length-1)
+				end
+				lbl_disp.text = s
+			end
+		else if user_data isa Int then # is a number
+			var n = user_data
+			context.push_digit( n )
+			lbl_disp.text = context.current.to_precision_native(after_point)
+		end
+	end
+
+	init
+	do
+		init_gtk
+
+		win = new GtkWindow( 0 )
+
+		container = new GtkGrid(5,5,true)
+		win.add( container )
+
+		lbl_disp = new GtkLabel( "_" )
+		container.attach( lbl_disp, 0, 0, 5, 1 )
+
+		# digits
+		for n in [0..9] do
+			var but = new GtkButton.with_label( n.to_s )
+			but.request_size( 64, 64 )
+			but.signal_connect( "clicked", self, n )
+			if n == 0 then
+				container.attach( but, 0, 4, 1, 1 )
+			else container.attach( but, (n-1)%3, 3-(n-1)/3, 1, 1 )
+		end
+
+		# operators
+		var r = 1
+		for op in ['+', '-', '*', '/' ] do
+			var but = new GtkButton.with_label( op.to_s )
+			but.request_size( 64, 64 )
+			but.signal_connect( "clicked", self, op )
+			container.attach( but, 3, r, 1, 1 )
+			r+=1
+		end
+
+		# =
+		but_eq = new GtkButton.with_label( "=" )
+		but_eq.request_size( 64, 64 )
+		but_eq.signal_connect( "clicked", self, '=' )
+		container.attach( but_eq, 4, 3, 1, 2 )
+
+		# .
+		but_dot = new GtkButton.with_label( "." )
+		but_dot.request_size( 64, 64 )
+		but_dot.signal_connect( "clicked", self, '.' )
+		container.attach( but_dot, 1, 4, 1, 1 )
+
+		#C
+		var but_c =  new GtkButton.with_label( "C" )
+		but_c.request_size( 64, 64 )
+		but_c.signal_connect("clicked", self, 'C')
+		container.attach( but_c, 2, 4, 1, 1 )
+
+		win.show_all
+	end
+end
+
+# context tests
+var context = new CalculatorContext
+context.push_digit( 1 )
+context.push_digit( 2 )
+context.push_op( '+' )
+context.push_digit( 3 )
+context.push_op( '*' )
+context.push_digit( 2 )
+context.push_op( '=' )
+var r = context.result.to_precision( 2 )
+assert r == "30.00" else print r
+
+context = new CalculatorContext
+context.push_digit( 1 )
+context.push_digit( 4 )
+context.switch_to_decimals
+context.push_digit( 1 )
+context.push_op( '*' )
+context.push_digit( 3 )
+context.push_op( '=' )
+r = context.result.to_precision( 2 )
+assert r == "42.30" else print r
+
+context.push_op( '+' )
+context.push_digit( 1 )
+context.push_digit( 1 )
+context.push_op( '=' )
+r = context.result.to_precision( 2 )
+assert r == "53.30" else print r
+
+context = new CalculatorContext
+context.push_digit( 4 )
+context.push_digit( 2 )
+context.switch_to_decimals
+context.push_digit( 3 )
+context.push_op( '/' )
+context.push_digit( 3 )
+context.push_op( '=' )
+r = context.result.to_precision( 2 )
+assert r == "14.10" else print r
+
+#test multiple decimals
+context = new CalculatorContext
+context.push_digit( 5 )
+context.push_digit( 0 )
+context.switch_to_decimals
+context.push_digit( 1 )
+context.push_digit( 2 )
+context.push_digit( 3 )
+context.push_op( '+' )
+context.push_digit( 1 )
+context.push_op( '=' )
+r = context.result.to_precision( 3 )
+assert r == "51.123" else print r
+
+#test 'C' button
+context = new CalculatorContext
+context.push_digit( 1 )
+context.push_digit( 0 )
+context.push_op( '+' )
+context.push_digit( 1 )
+context.push_digit( 0 )
+context.push_op( '=' )
+context.push_op( 'C' )
+r = context.result.to_precision( 1 )
+assert r == "0.0" else print r
+
+# graphical application
+
+if "NIT_TESTING".environ != "true" then
+	var app = new CalculatorGui
+	run_gtk
+end

samples/Nit/callback_chimpanze.nit

@@ -0,0 +1,45 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2013 Matthieu Lucas <lucasmatthieu@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This sample has been implemented to show you how simple is it to play 
+# with native callbacks (C) through an high level with NIT program.
+
+module callback_chimpanze
+import callback_monkey
+
+class Chimpanze
+	super MonkeyActionCallable
+
+	fun create
+	do
+		var monkey = new Monkey
+		print "Hum, I'm sleeping ..."
+		# Invoking method which will take some time to compute, and 
+		# will be back in wokeUp method with information.
+		# - Callback method defined in MonkeyActionCallable Interface
+		monkey.wokeUpAction(self, "Hey, I'm awake.")
+	end
+
+	# Inherit callback method, defined by MonkeyActionCallable interface
+	# - Back of wokeUpAction method 
+	redef fun wokeUp( sender:Monkey, message:Object )
+	do
+		print message
+	end
+end
+
+var m = new Chimpanze
+m.create

samples/Nit/callback_monkey.nit

@@ -0,0 +1,92 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2013 Matthieu Lucas <lucasmatthieu@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This sample has been implemented to show you how simple is it to play 
+# with native callbacks (C) through an high level with NIT program.
+
+module callback_monkey
+
+in "C header" `{
+	#include <stdio.h>
+	#include <stdlib.h>
+
+	typedef struct { 
+		int id;
+		int age;
+	} CMonkey;
+
+	typedef struct {
+		MonkeyActionCallable toCall;
+		Object message;
+	} MonkeyAction;
+`}
+
+in "C body" `{
+	// Method which reproduce a callback answer
+	// Please note that a function pointer is only used to reproduce the callback
+	void cbMonkey(CMonkey *mkey, void callbackFunc(CMonkey*, MonkeyAction*), MonkeyAction *data)
+	{
+		sleep(2);
+		callbackFunc( mkey, data );
+	}
+
+	// Back of background treatment, will be redirected to callback function
+	void nit_monkey_callback_func( CMonkey *mkey, MonkeyAction *data )
+	{
+		// To call a your method, the signature must be written like this :
+		// <Interface Name>_<Method>...
+		MonkeyActionCallable_wokeUp( data->toCall, mkey, data->message );
+	}
+`}
+
+# Implementable interface to get callback in defined methods
+interface MonkeyActionCallable
+	fun wokeUp( sender:Monkey, message: Object) is abstract
+end
+
+# Defining my object type Monkey, which is, in a low level, a pointer to a C struct (CMonkey)
+extern class Monkey `{ CMonkey * `}
+	
+	new `{
+		CMonkey *monkey = malloc( sizeof(CMonkey) );
+		monkey->age = 10;
+		monkey->id = 1;
+		return monkey;
+	`}
+	
+	# Object method which will get a callback in wokeUp method, defined in MonkeyActionCallable interface
+	# Must be defined as Nit/C method because of C call inside
+	fun wokeUpAction( toCall: MonkeyActionCallable, message: Object ) is extern import MonkeyActionCallable.wokeUp `{
+
+		// Allocating memory to keep reference of received parameters :
+		// - Object receiver
+		// - Message 
+		MonkeyAction *data = malloc( sizeof(MonkeyAction) );
+
+		// Incrementing reference counter to prevent from releasing
+		MonkeyActionCallable_incr_ref( toCall );
+		Object_incr_ref( message );
+		
+		data->toCall = toCall;
+		data->message = message;
+		
+		// Calling method which reproduce a callback by passing :
+		// - Receiver
+		// - Function pointer to object return method
+		// - Datas
+		cbMonkey( recv, &nit_monkey_callback_func, data );
+	`}
+end

samples/Nit/circular_list.nit

@@ -0,0 +1,167 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Implementation of circular lists
+# This example shows the usage of generics and somewhat a specialisation of collections.
+module circular_list
+
+# Sequences of elements implemented with a double-linked circular list
+class CircularList[E]
+	# Like standard Array or LinkedList, CircularList is a Sequence.
+	super Sequence[E]
+
+	# The first node of the list if any
+	# The special case of an empty list is handled by a null node
+	private var node: nullable CLNode[E] = null
+
+	redef fun iterator do return new CircularListIterator[E](self)
+
+	redef fun first do return self.node.item
+
+	redef fun push(e)
+	do
+		var new_node = new CLNode[E](e)
+		var n = self.node
+		if n == null then
+			# the first node
+			self.node = new_node
+		else
+			# not the first one, so attach nodes correctly.
+			var old_last_node = n.prev
+			new_node.next = n
+			new_node.prev = old_last_node
+			old_last_node.next = new_node
+			n.prev = new_node
+		end
+	end
+
+	redef fun pop
+	do
+		var n = self.node
+		assert n != null
+		var prev = n.prev
+		if prev == n then
+			# the only node
+			self.node = null
+			return n.item
+		end
+		# not the only one do detach nodes correctly.
+		var prev_prev = prev.prev
+		n.prev = prev_prev
+		prev_prev.next = n
+		return prev.item
+	end
+
+	redef fun unshift(e)
+	do
+		# Circularity has benefits.
+		push(e)
+		self.node = self.node.prev
+	end
+
+	redef fun shift
+	do
+		# Circularity has benefits.
+		self.node = self.node.next
+		return self.pop
+	end
+
+	# Move the first at the last position, the second at the first, etc.
+	fun rotate
+	do
+		var n = self.node
+		if n == null then return
+		self.node = n.next
+	end
+
+	# Sort the list using the Josephus algorithm.
+	fun josephus(step: Int)
+	do
+		var res = new CircularList[E]
+		while not self.is_empty do
+			# count 'step'
+			for i in [1..step[ do self.rotate
+			# kill
+			var x = self.shift
+			res.add(x)
+		end
+		self.node = res.node
+	end
+end
+
+# Nodes of a CircularList
+private class CLNode[E]
+	# The current item
+	var item: E
+
+	# The next item in the circular list.
+	# Because of circularity, there is always a next;
+	# so by default let it be self
+	var next: CLNode[E] = self
+
+	# The previous item in the circular list.
+	# Coherence between next and previous nodes has to be maintained by the
+	# circular list.
+	var prev: CLNode[E] = self
+end
+
+# An iterator of a CircularList.
+private class CircularListIterator[E]
+	super IndexedIterator[E]
+
+	redef var index: Int
+
+	# The current node pointed.
+	# Is null if the list is empty.
+	var node: nullable CLNode[E]
+
+	# The list iterated.
+	var list: CircularList[E]
+
+	redef fun is_ok
+	do
+		# Empty lists are not OK.
+		# Pointing again the first node is not OK.
+		return self.node != null and (self.index == 0 or self.node != self.list.node)
+	end
+
+	redef fun next
+	do
+		self.node = self.node.next
+		self.index += 1
+	end
+
+	redef fun item do return self.node.item
+
+	init(list: CircularList[E])
+	do
+		self.node = list.node
+		self.list = list
+		self.index = 0
+	end
+end
+
+var i = new CircularList[Int]
+i.add_all([1, 2, 3, 4, 5, 6, 7])
+print i.first
+print i.join(":")
+
+i.push(8)
+print i.shift
+print i.pop
+i.unshift(0)
+print i.join(":")
+
+i.josephus(3)
+print i.join(":")

samples/Nit/clock.nit

@@ -0,0 +1,78 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This module provide a simple wall clock.
+# It is an example of getters and setters.
+# A beefed-up module is available in clock_more
+module clock
+
+# A simple wall clock with 60 minutes and 12 hours.
+class Clock
+	# total number of minutes from 0 to 719
+	var total_minutes: Int
+	# Note: only the read acces is public, the write access is private.
+
+	# number of minutes in the current hour (from 0 to 59)
+	fun minutes: Int do return self.total_minutes % 60
+	
+	# set the number of minutes in the current hour.
+	# if m < 0 or m >= 60, the hour will be changed accordinlgy
+	fun minutes=(m: Int) do self.total_minutes = self.hours * 60 + m
+
+	# number of hours (from 0 to 11)
+	fun hours: Int do return self.total_minutes / 60
+
+	# set the number of hours
+	# the minutes will not be updated
+	fun hours=(h: Int) do self.total_minutes = h * 60 + minutes
+
+	# the position of the hour arrow in the [0..60[ interval
+	fun hour_pos: Int do return total_minutes / 12
+
+	# replace the arrow of hours (from 0 to 59).
+	# the hours and the minutes will be updated.
+	fun hour_pos=(h: Int) do self.total_minutes = h * 12
+
+	redef fun to_s do return "{hours}:{minutes}"
+
+	fun reset(hours, minutes: Int) do self.total_minutes = hours*60 + minutes
+
+	init(hours, minutes: Int) do self.reset(hours, minutes)
+
+	redef fun ==(o)
+	do
+		# Note: o is a nullable Object, a type test is required
+		# Thanks to adaptive typing, there is no downcast
+		# i.e. the code is safe!
+		return o isa Clock and self.total_minutes == o.total_minutes
+	end
+end
+
+var c = new Clock(10,50)
+print "It's {c} o'clock."
+
+c.minutes += 22
+print "Now it's {c} o'clock."
+
+print "The short arrow in on the {c.hour_pos/5} and the long arrow in on the {c.minutes/5}."
+
+c.hours -= 2
+print "Now it's {c} o'clock."
+
+var c2 = new Clock(9, 11)
+print "It's {c2} on the second clock."
+print "The two clocks are synchronized: {c == c2}."
+c2.minutes += 1
+print "It's now {c2} on the second clock."
+print "The two clocks are synchronized: {c == c2}."

samples/Nit/clock_more.nit

@@ -0,0 +1,60 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This module beef up the clock module by allowing a clock to be comparable.
+# It show the usage of class refinement
+module clock_more
+
+import clock
+
+redef class Clock
+	# Clock are now comparable
+	super Comparable
+
+	# Comparaison of a clock make only sense with an other clock
+	redef type OTHER: Clock
+
+	redef fun <(o)
+	do
+		# Note: < is the only abstract method of Comparable.
+		#       All other operators and methods rely on < and ==.
+		return self.total_minutes < o.total_minutes
+	end
+end
+
+var c1 = new Clock(8, 12)
+var c2 = new Clock(8, 13)
+var c3 = new Clock(9, 13)
+
+print "{c1}<{c2}? {c1<c2}"
+print "{c1}<={c2}? {c1<=c2}"
+print "{c1}>{c2}? {c1>c2}"
+print "{c1}>={c2}? {c1>=c2}"
+print "{c1}<=>{c2}? {c1<=>c2}"
+print "{c1},{c2}? max={c1.max(c2)} min={c1.min(c2)}"
+print "{c1}.is_between({c2}, {c3})? {c1.is_between(c2, c3)}"
+print "{c2}.is_between({c1}, {c3})? {c2.is_between(c1, c3)}"
+
+print "-"
+
+c1.minutes += 1
+
+print "{c1}<{c2}? {c1<c2}"
+print "{c1}<={c2}? {c1<=c2}"
+print "{c1}>{c2}? {c1>c2}"
+print "{c1}>={c2}? {c1>=c2}"
+print "{c1}<=>{c2}? {c1<=>c2}"
+print "{c1},{c2}? max={c1.max(c2)} min={c1.min(c2)}"
+print "{c1}.is_between({c2}, {c3})? {c1.is_between(c2, c3)}"
+print "{c2}.is_between({c1}, {c3})? {c2.is_between(c1, c3)}"

samples/Nit/curl_http.nit

@@ -0,0 +1,113 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2013 Matthieu Lucas <lucasmatthieu@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Sample of the Curl module.
+module curl_http
+
+import curl
+
+# Small class to represent an Http Fetcher
+class MyHttpFetcher
+	super CurlCallbacks
+
+	var curl: Curl
+	var our_body: String = ""
+
+	init(curl: Curl) do self.curl = curl
+
+	# Release curl object
+	fun destroy do self.curl.destroy
+
+	# Header callback
+	redef fun header_callback(line: String) do
+		# We keep this callback silent for testing purposes
+		#if not line.has_prefix("Date:") then print "Header_callback : {line}"
+	end
+
+	# Body callback
+	redef fun body_callback(line: String) do self.our_body = "{self.our_body}{line}"
+
+	# Stream callback - Cf : No one is registered
+	redef fun stream_callback(buffer: String, size: Int, count: Int) do print "Stream_callback : {buffer} - {size} - {count}"
+end
+
+
+# Program
+if args.length < 2 then
+	print "Usage: curl_http <method wished [POST, GET, GET_FILE]> <target url>"
+else
+	var curl = new Curl
+	var url = args[1]
+	var request = new CurlHTTPRequest(url, curl)
+
+	# HTTP Get Request
+	if args[0] == "GET" then
+		request.verbose = false
+		var getResponse = request.execute
+
+		if getResponse isa CurlResponseSuccess then
+			print "Status code : {getResponse.status_code}"
+			print "Body : {getResponse.body_str}"
+		else if getResponse isa CurlResponseFailed then
+			print "Error code : {getResponse.error_code}"
+			print "Error msg : {getResponse.error_msg}"
+		end
+
+	# HTTP Post Request
+	else if args[0] == "POST" then
+		var myHttpFetcher = new MyHttpFetcher(curl)
+		request.delegate = myHttpFetcher
+
+		var postDatas = new HeaderMap
+		postDatas["Bugs Bunny"] = "Daffy Duck"
+		postDatas["Batman"] = "Robin likes special characters @#ùà!è§'(\"é&://,;<>∞~*"
+		postDatas["Batman"] = "Yes you can set multiple identical keys, but APACHE will consider only once, the last one"
+		request.datas = postDatas
+		request.verbose = false
+		var postResponse = request.execute
+
+		print "Our body from the callback : {myHttpFetcher.our_body}"
+
+		if postResponse isa CurlResponseSuccess then
+			print "*** Answer ***"
+			print "Status code : {postResponse.status_code}"
+			print "Body should be empty, because we decided to manage callbacks : {postResponse.body_str.length}"
+		else if postResponse isa CurlResponseFailed then
+			print "Error code : {postResponse.error_code}"
+			print "Error msg : {postResponse.error_msg}"
+		end
+
+	# HTTP Get to file Request
+	else if args[0] == "GET_FILE" then
+		var headers = new HeaderMap
+		headers["Accept"] = "Moo"
+		request.headers = headers
+		request.verbose = false
+		var downloadResponse = request.download_to_file(null)
+
+		if downloadResponse isa CurlFileResponseSuccess then
+			print "*** Answer ***"
+			print "Status code : {downloadResponse.status_code}"
+			print "Size downloaded : {downloadResponse.size_download}"
+		else if downloadResponse isa CurlResponseFailed then
+			print "Error code : {downloadResponse.error_code}"
+			print "Error msg : {downloadResponse.error_msg}"
+		end
+	# Program logic
+	else
+		print "Usage : Method[POST, GET, GET_FILE]"
+	end
+end

samples/Nit/curl_mail.nit

@@ -0,0 +1,59 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2013 Matthieu Lucas <lucasmatthieu@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Mail sender sample using the Curl module
+module curl_mail
+
+import curl
+
+var curl = new Curl
+var mail_request = new CurlMailRequest(curl)
+
+# Networks
+var response = mail_request.set_outgoing_server("smtps://smtp.example.org:465", "user@example.org", "mypassword")
+if response isa CurlResponseFailed then
+	print "Error code : {response.error_code}"
+	print "Error msg : {response.error_msg}"
+end
+
+# Headers
+mail_request.from = "Billy Bob"
+mail_request.to = ["user@example.org"]
+mail_request.cc = ["bob@example.org"]
+mail_request.bcc = null
+
+var headers_body = new HeaderMap
+headers_body["Content-Type:"] = "text/html; charset=\"UTF-8\""
+headers_body["Content-Transfer-Encoding:"] = "quoted-printable"
+mail_request.headers_body = headers_body
+
+# Content
+mail_request.body = "<h1>Here you can write HTML stuff.</h1>"
+mail_request.subject = "Hello From My Nit Program"
+
+# Others
+mail_request.verbose = false
+
+# Send mail
+response = mail_request.execute
+if response isa CurlResponseFailed then
+	print "Error code : {response.error_code}"
+	print "Error msg : {response.error_msg}"
+else if response isa CurlMailResponseSuccess then
+	print "Mail Sent"
+else
+	print "Unknown Curl Response type"
+end

samples/Nit/draw_operation.nit

@@ -0,0 +1,243 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2012-2013 Alexis Laferrière <alexis.laf@xymus.net>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Draws an arithmetic operation to the terminal
+module draw_operation
+
+redef enum Int
+	fun n_chars: Int `{
+		int c;
+		if ( abs(recv) >= 10 )
+			c = 1+(int)log10f( (float)abs(recv) );
+		else
+			c = 1;
+		if ( recv < 0 ) c ++;
+		return c;
+	`}
+end
+
+redef enum Char
+	fun as_operator(a, b: Int): Int
+	do
+		if self == '+' then return a + b
+		if self == '-' then return a - b
+		if self == '*' then return a * b
+		if self == '/' then return a / b
+		if self == '%' then return a % b
+		abort
+	end
+
+	fun override_dispc: Bool
+	do
+		return self == '+' or self == '-' or self == '*' or self == '/' or self == '%'
+	end
+
+	fun lines(s: Int): Array[Line]
+	do
+		if self == '+' then
+			return [new Line(new P(0,s/2),1,0,s), new Line(new P(s/2,1),0,1,s-2)]
+		else if self == '-' then
+			return [new Line(new P(0,s/2),1,0,s)]
+		else if self == '*' then
+			var lines = new Array[Line]
+			for y in [1..s-1[ do
+				lines.add( new Line(new P(1,y), 1,0,s-2) )
+			end
+			return lines
+		else if self == '/' then
+			return [new Line(new P(s-1,0), -1,1, s )]
+		else if self == '%' then
+			var q4 = s/4
+			var lines = [new Line(new P(s-1,0),-1,1,s)]
+			for l in [0..q4[ do
+				lines.append([ new Line( new P(0,l), 1,0,q4), new Line( new P(s-1,s-1-l), -1,0,q4) ])
+			end
+			return lines
+		else if self == '1' then
+			return [new Line(new P(s/2,0), 0,1,s),new Line(new P(0,s-1),1,0,s),
+				new Line( new P(s/2,0),-1,1,s/2)]
+		else if self == '2' then
+			return [new Line(new P(0,0), 1,0,s),new Line(new P(s-1,0),0,1,s/2),
+				new Line( new P(0,s-1),1,0,s), new Line( new P(0,s/2), 0,1,s/2),
+				new Line( new P(0,s/2), 1,0,s)]
+		else if self == '3' then
+			return [new Line(new P(0,0), 1,0,s),new Line(new P(s-1,0),0,1,s),
+				new Line( new P(0,s-1),1,0,s), new Line( new P(0,s/2), 1,0,s)]
+		else if self == '4' then
+			return [new Line(new P(s-1,0),0,1,s), new Line( new P(0,0), 0,1,s/2),
+				new Line( new P(0,s/2), 1,0,s)]
+		else if self == '5' then
+			return [new Line(new P(0,0), 1,0,s),new Line(new P(s-1,s/2),0,1,s/2),
+				new Line( new P(0,s-1),1,0,s), new Line( new P(0,0), 0,1,s/2),
+				new Line( new P(0,s/2), 1,0,s)]
+		else if self == '6' then
+			return [new Line(new P(0,0), 1,0,s),new Line(new P(s-1,s/2),0,1,s/2),
+				new Line( new P(0,s-1),1,0,s), new Line( new P(0,0), 0,1,s),
+				new Line( new P(0,s/2), 1,0,s)]
+		else if self == '7' then
+			var tl = new P(0,0)
+			var tr = new P(s-1,0)
+			return [new Line(tl, 1,0,s), new Line(tr,-1,1,s)]
+		else if self == '8' then
+			return [new Line(new P(0,0), 1,0,s),new Line(new P(s-1,0),0,1,s),
+				new Line( new P(0,s-1),1,0,s), new Line( new P(0,0), 0,1,s),
+				new Line( new P(0,s/2), 1,0,s)]
+		else if self == '9' then
+			return [new Line(new P(0,0), 1,0,s),new Line(new P(s-1,0),0,1,s),
+				new Line( new P(0,s-1),1,0,s), new Line( new P(0,0), 0,1,s/2),
+				new Line( new P(0,s/2), 1,0,s)]
+		else if self == '0' then
+			return [new Line(new P(0,0), 1,0,s),new Line(new P(s-1,0),0,1,s),
+				new Line( new P(0,s-1),1,0,s), new Line( new P(0,0), 0,1,s)]
+		end
+		return new Array[Line]
+	end
+end
+
+class P
+	var x : Int
+	var y : Int
+end
+
+redef class String
+	# hack is to support a bug in the evaluation software
+	fun draw(dispc: Char, size, gap: Int, hack: Bool)
+	do
+		var w = size * length +(length-1)*gap
+		var h = size
+		var map = new Array[Array[Char]]
+		for x in [0..w[ do
+			map[x] = new Array[Char].filled_with( ' ',  h )
+		end
+
+		var ci = 0
+		for c in self.chars do
+			var local_dispc
+			if c.override_dispc then
+				local_dispc = c
+			else
+				local_dispc = dispc
+			end
+
+			var lines = c.lines( size )
+			for line in lines do
+				var x = line.o.x+ci*size
+					x += ci*gap
+				var y = line.o.y
+				for s in [0..line.len[ do
+					assert map.length > x and map[x].length > y else print "setting {x},{y} as {local_dispc}"
+					map[x][y] = local_dispc
+					x += line.step_x
+					y += line.step_y
+				end
+			end
+
+			ci += 1
+		end
+
+		if hack then
+			for c in [0..size[ do
+				map[c][0] = map[map.length-size+c][0]
+				map[map.length-size+c][0] = ' '
+			end
+		end
+
+		for y in [0..h[ do
+			for x in [0..w[ do
+				printn map[x][y]
+			end
+			print ""
+		end
+	end
+end
+
+class Line
+	var o : P
+	var step_x : Int
+	var step_y : Int
+	var len : Int
+end
+
+var a
+var b
+var op_char
+var disp_char
+var disp_size
+var disp_gap
+
+if "NIT_TESTING".environ == "true" then
+	a = 567
+	b = 13
+	op_char = '*'
+	disp_char = 'O'
+	disp_size = 8
+	disp_gap = 1
+else
+	printn "Left operand: "
+	a = gets.to_i
+
+	printn "Right operand: "
+	b = gets.to_i
+
+	printn "Operator (+, -, *, /, %): "
+	op_char = gets.chars[0]
+
+	printn "Char to display: "
+	disp_char = gets.chars[0]
+
+	printn "Size of text: "
+	disp_size = gets.to_i
+
+	printn "Space between digits: "
+	disp_gap = gets.to_i
+end
+
+var result = op_char.as_operator( a, b )
+
+var len_a = a.n_chars
+var len_b = b.n_chars
+var len_res = result.n_chars
+var max_len = len_a.max( len_b.max( len_res ) ) + 1
+
+# draw first line
+var d = max_len - len_a
+var line_a = ""
+for i in [0..d[ do line_a += " "
+line_a += a.to_s
+line_a.draw( disp_char, disp_size, disp_gap, false )
+
+print ""
+# draw second line
+d = max_len - len_b-1
+var line_b = op_char.to_s
+for i in [0..d[ do line_b += " "
+line_b += b.to_s
+line_b.draw( disp_char, disp_size, disp_gap, false )
+
+# draw -----
+print ""
+for i in [0..disp_size*max_len+(max_len-1)*disp_gap] do
+	printn "_"
+end
+print ""
+print ""
+
+# draw result
+d = max_len - len_res
+var line_res = ""
+for i in [0..d[ do line_res += " "
+line_res += result.to_s
+line_res.draw( disp_char, disp_size, disp_gap, false )

samples/Nit/drop_privileges.nit

@@ -0,0 +1,46 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2013 Alexis Laferrière <alexis.laf@xymus.net>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Example using the privileges module to drop privileges from root
+module drop_privileges
+
+import privileges
+
+# basic command line options
+var opts = new OptionContext
+var opt_ug = new OptionUserAndGroup.for_dropping_privileges
+opt_ug.mandatory = true
+opts.add_option(opt_ug)
+
+# parse and check command line options
+opts.parse(args)
+if not opts.errors.is_empty then
+	print opts.errors
+	print "Usage: drop_privileges [options]"
+	opts.usage
+	exit 1
+end
+
+# original user
+print "before {sys.uid}:{sys.gid}"
+
+# make the switch
+var user_group = opt_ug.value
+assert user_group != null
+user_group.drop_privileges
+
+# final user
+print "after {sys.uid}:{sys.egid}"

samples/Nit/extern_methods.nit

@@ -0,0 +1,69 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2012-2013 Alexis Laferrière <alexis.laf@xymus.net>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This module illustrates some uses of the FFI, specifically
+# how to use extern methods. Which means to implement a Nit method in C.
+module extern_methods
+
+redef enum Int
+	# Returns self'th fibonnaci number
+	# implemented here in C for optimization purposes
+	fun fib : Int import fib `{
+		if ( recv < 2 )
+			return recv;
+		else
+			return Int_fib( recv-1 ) + Int_fib( recv-2 );
+	`}
+
+	# System call to sleep for "self" seconds
+	fun sleep `{
+		sleep( recv );
+	`}
+
+	# Return atan2l( self, x ) from libmath
+	fun atan_with( x : Int ) : Float `{
+		return atan2( recv, x );
+	`}
+
+	# This method callback to Nit methods from C code
+	# It will use from C code:
+	# * the local fib method
+	# * the + operator, a method of Int
+	# * to_s, a method of all objects
+	# * String.to_cstring, a method of String to return an equivalent char*
+	fun foo import fib, +, to_s, String.to_cstring `{
+		long recv_fib = Int_fib( recv );
+		long recv_plus_fib = Int__plus( recv, recv_fib );
+
+		String nit_string = Int_to_s( recv_plus_fib );
+		char *c_string = String_to_cstring( nit_string );
+
+		printf( "from C: self + fib(self) = %s\n", c_string );
+	`}
+
+	# Equivalent to foo but written in pure Nit
+	fun bar do print "from Nit: self + fib(self) = {self+self.fib}"
+end
+
+print 12.fib
+
+print "sleeping 1 second..."
+1.sleep
+
+print 100.atan_with( 200 )
+8.foo
+8.bar
+

samples/Nit/fibonacci.nit

@@ -0,0 +1,43 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2004-2008 Jean Privat <jean@pryen.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A simple exemple of refinement where a method is added to the integer class.
+module fibonacci
+
+redef class Int
+	# Calculate the self-th element of the fibonacci sequence.
+	fun fibonacci: Int
+	do
+		if self < 2 then
+			return 1
+		else
+			return (self-2).fibonacci + (self-1).fibonacci
+		end
+	end 
+end
+
+# Print usage and exit.
+fun usage
+do
+	print "Usage: fibonnaci <integer>" 
+	exit 0 
+end
+
+# Main part
+if args.length != 1 then
+	usage
+end
+print args.first.to_i.fibonacci

samples/Nit/hello_world.nit

@@ -0,0 +1 @@
+print "hello world"

samples/Nit/html_page.nit

@@ -0,0 +1,105 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import html
+
+class NitHomepage
+	super HTMLPage
+
+	redef fun head do
+		add("meta").attr("charset", "utf-8")
+		add("title").text("Nit")
+		add("link").attr("rel", "icon").attr("href", "http://nitlanguage.org/favicon.ico").attr("type", "image/x-icon")
+		add("link").attr("rel", "stylesheet").attr("href", "http://nitlanguage.org/style.css").attr("type", "text/css")
+		add("link").attr("rel", "stylesheet").attr("href", "http://nitlanguage.org/local.css").attr("type", "text/css")
+	end
+
+	redef fun body do
+		open("article").add_class("page")
+			open("section").add_class("pageheader")
+				add_html("<a id='toptitle_first' class='toptitle'>the</a><a id='toptitle_second' class='toptitle' href=''>Nit</a><a id='toptitle_third' class='toptitle' href=''>Programming Language</a>")
+				open("header").add_class("header")
+					open("div").add_class("topsubtitle")
+						add("p").text("A Fun Language for Serious Programming")
+					close("div")
+				close("header")
+			close("section")
+
+			open("div").attr("id", "pagebody")
+				open("section").attr("id", "content")
+					add("h1").text("# What is Nit?")
+					add("p").text("Nit is an object-oriented programming language. The goal of Nit is to propose a robust statically typed programming language where structure is not a pain.")
+					add("p").text("So, what does the famous hello world program look like, in Nit?")
+					add_html("<pre><tt><span class='normal'>print </span><span class='string'>'Hello, World!'</span></tt></pre>")
+
+					add("h1").text("# Feature Highlights")
+					add("h2").text("Usability")
+					add("p").text("Nit's goal is to be usable by real programmers for real projects")
+
+					open("ul")
+						open("li")
+						add("a").attr("href", "http://en.wikipedia.org/wiki/KISS_principle").text("KISS principle")
+						close("li")
+						add("li").text("Script-like language without verbosity nor cryptic statements")
+						add("li").text("Painless static types: static typing should help programmers")
+						add("li").text("Efficient development, efficient execution, efficient evolution.")
+					close("ul")
+
+					add("h2").text("Robustness")
+					add("p").text("Nit will help you to write bug-free programs")
+
+					open("ul")
+						add("li").text("Strong static typing")
+						add("li").text("No more NullPointerException")
+					close("ul")
+
+					add("h2").text("Object-Oriented")
+					add("p").text("Nit's guideline is to follow the most powerful OO principles")
+
+					open("ul")
+						open("li")
+						add("a").attr("href", "./everything_is_an_object/").text("Everything is an object")
+						close("li")
+						open("li")
+						add("a").attr("href", "./multiple_inheritance/").text("Multiple inheritance")
+						close("li")
+						open("li")
+						add("a").attr("href", "./refinement/").text("Open classes")
+						close("li")
+						open("li")
+						add("a").attr("href", "./virtual_types/").text("Virtual types")
+						close("li")
+					close("ul")
+
+
+					add("h1").text("# Getting Started")
+					add("p").text("Get Nit from its Git repository:")
+
+					add_html("<pre><code>$ git clone http://nitlanguage.org/nit.git</code></pre>")
+					add("p").text("Build the compiler (may be long):")
+					add_html("<pre><code>$ cd nit\n")
+					add_html("$ make</code></pre>")
+					add("p").text("Compile a program:")
+					add_html("<pre><code>$ bin/nitc examples/hello_world.nit</code></pre>")
+					add("p").text("Execute the program:")
+					add_html("<pre><code>$ ./hello_world</code></pre>")
+				close("section")
+			close("div")
+		close("article")
+	end
+end
+
+var page = new NitHomepage
+page.write_to stdout
+page.write_to_file("nit.html")

samples/Nit/int_stack.nit

@@ -0,0 +1,100 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# An example that defines and uses stacks of integers.
+# The implementation is done with a simple linked list.
+# It features: free constructors, nullable types and some adaptive typing.
+module int_stack
+
+# A stack of integer implemented by a simple linked list.
+# Note that this is only a toy class since a real linked list will gain to use
+# generics and extends interfaces, like Collection, from the standard library.
+class IntStack
+	# The head node of the list.
+	# Null means that the stack is empty.
+	private var head: nullable ISNode = null
+
+	# Add a new integer in the stack.
+	fun push(val: Int)
+	do
+		self.head = new ISNode(val, self.head)
+	end
+
+	# Remove and return the last pushed integer.
+	# Return null if the stack is empty.
+	fun pop: nullable Int
+	do
+		var head = self.head
+		if head == null then return null
+		# Note: the followings are statically safe because of the
+		# previous 'if'.
+		var val = head.val
+		self.head = head.next
+		return val
+	end
+
+	# Return the sum of all integers of the stack.
+	# Return 0 if the stack is empty.
+	fun sumall: Int
+	do
+		var sum = 0
+		var cur = self.head
+		while cur != null do
+			# Note: the followings are statically safe because of
+			# the condition of the 'while'.
+			sum += cur.val
+			cur = cur.next
+		end
+		return sum
+	end
+
+	# Note: Because all attributes have a default value, a free constructor
+	# "init()" is implicitly defined.
+end
+
+# A node of a IntStack
+private class ISNode
+	# The integer value stored in the node.
+	var val: Int
+
+	# The next node, if any.
+	var next: nullable ISNode
+
+	# Note: A free constructor "init(val: Int, next: nullable ISNode)" is
+	# implicitly defined.
+end
+
+var l = new IntStack
+l.push(1)
+l.push(2)
+l.push(3)
+
+print l.sumall
+
+# Note: the 'for' control structure cannot be used on IntStack in its current state.
+# It requires a more advanced topic.
+# However, why not using the 'loop' control structure?
+loop
+	var i = l.pop
+	if i == null then break
+	# The following is statically safe because of the previous 'if'.
+	print i * 10
+end
+
+# Note: 'or else' is used to give an alternative of a null expression.
+l.push(5)
+print l.pop or else 0 # l.pop gives 5, so print 5
+print l.pop or else 0 # l.pop gives null, so print the alternative: 0
+
+

samples/Nit/opengles2_hello_triangle.nit

@@ -0,0 +1,193 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2014 Alexis Laferrière <alexis.laf@xymus.net>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Basic example of OpenGL ES 2.0 usage from the book OpenGL ES 2.0 Programming Guide.
+#
+# Code reference:
+# https://code.google.com/p/opengles-book-samples/source/browse/trunk/LinuxX11/Chapter_2/Hello_Triangle/Hello_Triangle.c 
+module opengles2_hello_triangle
+
+import glesv2
+import egl
+import mnit_linux # for sdl
+import x11
+
+if "NIT_TESTING".environ == "true" then exit(0)
+
+var window_width = 800
+var window_height = 600
+
+#
+## SDL
+#
+var sdl_display = new SDLDisplay(window_width, window_height)
+var sdl_wm_info = new SDLSystemWindowManagerInfo
+var x11_window_handle = sdl_wm_info.x11_window_handle
+
+#
+## X11
+#
+var x_display = x_open_default_display
+assert x_display != 0 else print "x11 fail"
+
+#
+## EGL
+#
+var egl_display = new EGLDisplay(x_display)
+assert egl_display.is_valid else print "EGL display is not valid"
+egl_display.initialize
+
+print "EGL version: {egl_display.version}"
+print "EGL vendor: {egl_display.vendor}"
+print "EGL extensions: {egl_display.extensions.join(", ")}"
+print "EGL client APIs: {egl_display.client_apis.join(", ")}"
+
+assert egl_display.is_valid else print egl_display.error
+
+var config_chooser = new EGLConfigChooser
+#config_chooser.surface_type_egl
+config_chooser.blue_size = 8
+config_chooser.green_size = 8
+config_chooser.red_size = 8
+#config_chooser.alpha_size = 8
+#config_chooser.depth_size = 8
+#config_chooser.stencil_size = 8
+#config_chooser.sample_buffers = 1
+config_chooser.close
+
+var configs = config_chooser.choose(egl_display)
+assert configs != null else print "choosing config failed: {egl_display.error}"
+assert not configs.is_empty else print "no EGL config"
+
+print "{configs.length} EGL configs available"
+for config in configs do
+	var attribs = config.attribs(egl_display)
+	print "* caveats: {attribs.caveat}"
+	print "  conformant to: {attribs.conformant}"
+	print "  size of RGBA: {attribs.red_size} {attribs.green_size} {attribs.blue_size} {attribs.alpha_size}"
+	print "  buffer, depth, stencil: {attribs.buffer_size} {attribs.depth_size} {attribs.stencil_size}"
+end
+
+var config = configs.first
+
+var format = config.attribs(egl_display).native_visual_id
+
+# TODO android part
+# Opengles1Display_midway_init(recv, format);
+
+var surface = egl_display.create_window_surface(config, x11_window_handle, [0])
+assert surface.is_ok else print egl_display.error
+
+var context = egl_display.create_context(config)
+assert context.is_ok else print egl_display.error
+
+var make_current_res = egl_display.make_current(surface, surface, context)
+assert make_current_res
+
+var width = surface.attribs(egl_display).width
+var height = surface.attribs(egl_display).height
+print "Width: {width}"
+print "Height: {height}"
+
+assert egl_bind_opengl_es_api else print "eglBingAPI failed: {egl_display.error}"
+
+#
+## GLESv2
+#
+
+print "Can compile shaders? {gl_shader_compiler}"
+assert_no_gl_error
+
+assert gl_shader_compiler else print "Cannot compile shaders"
+
+# gl program
+print gl_error.to_s
+var program = new GLProgram
+if not program.is_ok then
+	print "Program is not ok: {gl_error.to_s}\nLog:"
+	print program.info_log
+	abort
+end
+assert_no_gl_error
+
+# vertex shader
+var vertex_shader = new GLVertexShader
+assert vertex_shader.is_ok else print "Vertex shader is not ok: {gl_error}"
+vertex_shader.source = """
+attribute vec4 vPosition;   
+void main()                 
+{                           
+  gl_Position = vPosition;  
+}                           """
+vertex_shader.compile
+assert vertex_shader.is_compiled else print "Vertex shader compilation failed with: {vertex_shader.info_log} {program.info_log}"
+assert_no_gl_error
+
+# fragment shader
+var fragment_shader = new GLFragmentShader
+assert fragment_shader.is_ok else print "Fragment shader is not ok: {gl_error}"
+fragment_shader.source = """
+precision mediump float;
+void main()
+{
+	gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
+}
+"""
+fragment_shader.compile
+assert fragment_shader.is_compiled else print "Fragment shader compilation failed with: {fragment_shader.info_log}"
+assert_no_gl_error
+
+program.attach_shader vertex_shader
+program.attach_shader fragment_shader
+program.bind_attrib_location(0, "vPosition")
+program.link
+assert program.is_linked else print "Linking failed: {program.info_log}"
+assert_no_gl_error
+
+# draw!
+var vertices = [0.0, 0.5, 0.0, -0.5, -0.5, 0.0, 0.5, -0.5, 0.0]
+var vertex_array = new VertexArray(0, 3, vertices)
+vertex_array.attrib_pointer
+gl_clear_color(0.5, 0.0, 0.5, 1.0)
+for i in [0..10000[ do
+	printn "."
+	assert_no_gl_error
+	gl_viewport(0, 0, width, height)
+	gl_clear_color_buffer
+	program.use
+	vertex_array.enable
+	vertex_array.draw_arrays_triangles
+	egl_display.swap_buffers(surface)
+end
+
+# delete
+program.delete
+vertex_shader.delete
+fragment_shader.delete
+
+#
+## EGL
+#
+# close
+egl_display.make_current(new EGLSurface.none, new EGLSurface.none, new EGLContext.none)
+egl_display.destroy_context(context)
+egl_display.destroy_surface(surface)
+
+#
+## SDL
+#
+# close
+sdl_display.destroy

samples/Nit/print_arguments.nit

@@ -0,0 +1,22 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2004-2008 Jean Privat <jean@pryen.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# How to print arguments of the command line.
+module print_arguments
+
+for a in args do
+	print a
+end

samples/Nit/procedural_array.nit

@@ -0,0 +1,48 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2004-2008 Jean Privat <jean@pryen.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A procedural program (without explicit class definition).
+# This program manipulates arrays of integers.
+module procedural_array
+
+# The sum of the elements of `a'.
+# Uses a 'for' control structure.
+fun array_sum(a: Array[Int]): Int
+do
+	var sum = 0
+	for i in a do
+		sum = sum + i
+	end
+	return sum
+end
+
+# The sum of the elements of `a' (alternative version).
+# Uses a 'while' control structure.
+fun array_sum_alt(a: Array[Int]): Int
+do
+	var sum = 0
+	var i = 0
+	while i < a.length do
+		sum = sum + a[i]
+		i = i + 1
+	end
+	return sum
+end
+
+# The main part of the program.
+var a = [10, 5, 8, 9]
+print(array_sum(a))
+print(array_sum_alt(a))

samples/Nit/socket_client.nit

@@ -0,0 +1,38 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2013 Matthieu Lucas <lucasmatthieu@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Client sample using the Socket module which connect to the server sample.
+module socket_client
+
+import socket
+
+if args.length < 2 then
+	print "Usage : socket_client <host> <port>"
+	return
+end
+
+var s = new Socket.client(args[0], args[1].to_i)
+print "[HOST ADDRESS] : {s.address}"
+print "[HOST] : {s.host}"
+print "[PORT] : {s.port}"
+print "Connecting ... {s.connected}"
+if s.connected then
+	print "Writing ... Hello server !"
+	s.write("Hello server !")
+	print "[Response from server] : {s.read(100)}"
+	print "Closing ..."
+	s.close
+end

samples/Nit/socket_server.nit

@@ -0,0 +1,52 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2013 Matthieu Lucas <lucasmatthieu@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Server sample using the Socket module which allow client to connect
+module socket_server
+
+import socket
+
+if args.is_empty then
+	print "Usage : socket_server <port>"
+	return
+end
+
+var socket = new Socket.server(args[0].to_i, 1)
+print "[PORT] : {socket.port.to_s}"
+
+var clients = new Array[Socket]
+var max = socket
+loop
+	var fs = new SocketObserver(true, true, true)
+	fs.readset.set(socket)
+
+	for c in clients do fs.readset.set(c)
+
+	if fs.select(max, 4, 0) == 0 then
+		print "Error occured in select {sys.errno.strerror}"
+		break
+	end
+
+	if fs.readset.is_set(socket) then
+		var ns = socket.accept
+		print "Accepting {ns.address} ... "
+		print "[Message from {ns.address}] : {ns.read(100)}"
+		ns.write("Goodbye client.")
+		print "Closing {ns.address} ..."
+		ns.close
+	end
+end
+

samples/Nit/tmpl_composer.nit

@@ -0,0 +1,94 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import template
+
+### Here, definition of the specific templates
+
+# The root template for composers
+class TmplComposers
+	super Template
+
+	# Short list of composers
+	var composers = new Array[TmplComposer]
+
+	# Detailled list of composers
+	var composer_details = new Array[TmplComposerDetail]
+
+	# Add a composer in both lists
+	fun add_composer(firstname, lastname: String, birth, death: Int)
+	do
+		composers.add(new TmplComposer(lastname))
+		composer_details.add(new TmplComposerDetail(firstname, lastname, birth, death))
+	end
+
+	redef fun rendering do
+		add """
+COMPOSERS
+=========
+"""
+		add_all composers
+		add """
+
+DETAILS
+=======
+"""
+		add_all composer_details
+	end
+end
+
+# A composer in the short list of composers
+class TmplComposer
+	super Template
+
+	# Short name
+	var name: String
+
+	init(name: String) do self.name = name
+
+	redef fun rendering do add "- {name}\n"
+end
+
+# A composer in the detailled list of composers
+class TmplComposerDetail
+	super Template
+
+	var firstname: String
+	var lastname: String
+	var birth: Int
+	var death: Int
+
+	init(firstname, lastname: String, birth, death: Int) do
+		self.firstname = firstname
+		self.lastname = lastname
+		self.birth = birth
+		self.death = death
+	end
+
+	redef fun rendering do add """
+
+COMPOSER: {{{firstname}}} {{{lastname}}}
+BIRTH...: {{{birth}}}
+DEATH...: {{{death}}}
+"""
+
+end
+
+### Here a simple usage of the templates
+
+var f = new TmplComposers
+f.add_composer("Johann Sebastian", "Bach", 1685, 1750)
+f.add_composer("George Frideric", "Handel", 1685, 1759)
+f.add_composer("Wolfgang Amadeus", "Mozart", 1756, 1791)
+f.write_to(stdout)

samples/Nit/websocket_server.nit

@@ -0,0 +1,46 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2014 Lucas Bajolet <r4pass@hotmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Sample module for a minimal chat server using Websockets on port 8088
+module websocket_server
+
+import websocket
+
+var sock = new WebSocket(8088, 1)
+
+var msg: String
+
+if sock.listener.eof then
+	print sys.errno.strerror
+end
+
+sock.accept
+
+while not sock.listener.eof do
+	if not sock.connected then sock.accept
+	if sys.stdin.poll_in then
+		msg = gets
+		printn "Received message : {msg}"
+		if msg == "exit" then sock.close
+		if msg == "disconnect" then sock.disconnect_client
+		sock.write(msg)
+	end
+	if sock.can_read(10) then
+		msg = sock.read_line
+		if msg != "" then print msg
+	end
+end
+

samples/Nix/nginx.nix

@@ -0,0 +1,80 @@
+{ stdenv, fetchurl, fetchgit, openssl, zlib, pcre, libxml2, libxslt, expat
+, rtmp ? false
+, fullWebDAV ? false
+, syslog ? false
+, moreheaders ? false, ...}:
+
+let
+  version = "1.4.4";
+  mainSrc = fetchurl {
+    url = "http://nginx.org/download/nginx-${version}.tar.gz";
+    sha256 = "1f82845mpgmhvm151fhn2cnqjggw9w7cvsqbva9rb320wmc9m63w";
+  };
+
+  rtmp-ext = fetchgit {
+    url = git://github.com/arut/nginx-rtmp-module.git;
+    rev = "1cfb7aeb582789f3b15a03da5b662d1811e2a3f1";
+    sha256 = "03ikfd2l8mzsjwx896l07rdrw5jn7jjfdiyl572yb9jfrnk48fwi";
+  };
+
+  dav-ext = fetchgit {
+    url = git://github.com/arut/nginx-dav-ext-module.git;
+    rev = "54cebc1f21fc13391aae692c6cce672fa7986f9d";
+    sha256 = "1dvpq1fg5rslnl05z8jc39sgnvh3akam9qxfl033akpczq1bh8nq";
+  };
+
+  syslog-ext = fetchgit {
+    url = https://github.com/yaoweibin/nginx_syslog_patch.git;
+    rev = "165affd9741f0e30c4c8225da5e487d33832aca3";
+    sha256 = "14dkkafjnbapp6jnvrjg9ip46j00cr8pqc2g7374z9aj7hrvdvhs";
+  };
+
+  moreheaders-ext = fetchgit {
+    url = https://github.com/agentzh/headers-more-nginx-module.git;
+    rev = "refs/tags/v0.23";
+    sha256 = "12pbjgsxnvcf2ff2i2qdn39q4cm5czlgrng96j8ml4cgxvnbdh39";
+  };
+in
+
+stdenv.mkDerivation rec {
+  name = "nginx-${version}";
+  src = mainSrc;
+
+  buildInputs = [ openssl zlib pcre libxml2 libxslt
+    ] ++ stdenv.lib.optional fullWebDAV expat;
+
+  patches = if syslog then [ "${syslog-ext}/syslog_1.4.0.patch" ] else [];
+
+  configureFlags = [
+    "--with-http_ssl_module"
+    "--with-http_spdy_module"
+    "--with-http_xslt_module"
+    "--with-http_sub_module"
+    "--with-http_dav_module"
+    "--with-http_gzip_static_module"
+    "--with-http_secure_link_module"
+    "--with-ipv6"
+    # Install destination problems
+    # "--with-http_perl_module"
+  ] ++ stdenv.lib.optional rtmp "--add-module=${rtmp-ext}"
+    ++ stdenv.lib.optional fullWebDAV "--add-module=${dav-ext}"
+    ++ stdenv.lib.optional syslog "--add-module=${syslog-ext}"
+    ++ stdenv.lib.optional moreheaders "--add-module=${moreheaders-ext}";
+
+  preConfigure = ''
+    export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${libxml2 }/include/libxml2"
+  '';
+
+  # escape example
+  postInstall = ''
+    mv $out/sbin $out/bin ''' ''${
+   ${ if true then ${ "" } else false }
+  '';
+
+  meta = {
+    description = "A reverse proxy and lightweight webserver";
+    maintainers = [ stdenv.lib.maintainers.raskin];
+    platforms = stdenv.lib.platforms.all;
+    inherit version;
+  };
+}

samples/Ox/IJCEmet2009.oxh

@@ -0,0 +1,72 @@
+/** Replicate Imai, Jain and Ching Econometrica 2009 (incomplete).
+
+**/
+#include "IJCEmet2009.h"
+
+Kapital::Kapital(L,const N,const entrant,const exit,const KP){
+	StateVariable(L,N);
+	this.entrant = entrant;
+	this.exit = exit;
+	this.KP = KP;
+	actual = Kbar*vals/(N-1);
+	upper = log(actual~.Inf);
+	}
+
+Kapital::Transit(FeasA) {
+	decl ent =CV(entrant), stayout = FeasA[][exit.pos], tprob, sigu = CV(KP[SigU]);
+	if (!v && !ent) return { <0>, ones(stayout) };
+	tprob = ent ? probn( (upper-CV(KP[Kbe]))/sigu )
+	           : probn( (upper-(CV(KP[Kb0])+CV(KP[Kb2])*upper[v])) / sigu );
+	tprob = tprob[1:] - tprob[:N-1];
+	return { vals, tprob.*(1-stayout)+(1.0~zeros(1,N-1)).*stayout };
+	}
+
+FirmEntry::Run() {
+	Initialize();
+	GenerateSample();
+	BDP->BayesianDP();
+	}
+
+FirmEntry::Initialize() {
+	Rust::Initialize(Reachable,0);
+	sige = new StDeviations("sige",<0.3,0.3>,0);
+	entrant = new LaggedAction("entrant",d);
+	KP = new array[Kparams];
+		KP[Kbe] = new Positive("be",0.5);
+		KP[Kb0] = new Free("b0",0.0);
+		KP[Kb1] = new Determined("b1",0.0);
+		KP[Kb2] = new Positive("b2",0.4);
+		KP[SigU] = new Positive("sigu",0.4);
+	EndogenousStates(K = new Kapital("K",KN,entrant,d,KP),entrant);
+	SetDelta(new Probability("delta",0.85));
+	kcoef = new Positive("kcoef",0.1);
+	ecost = new Negative("ec",-0.4);
+	CreateSpaces();
+	}
+
+FirmEntry::GenerateSample() {
+	Volume = LOUD;
+	EM = new ValueIteration(0);
+//	EM -> Solve(0,0);
+	data = new DataSet(0,EM);
+	data->Simulate(DataN,DataT,0,FALSE);
+	data->Print("firmentry.xls");
+	BDP = new ImaiJainChing("FMH",data,EM,ecost,sige,kcoef,KP,delta);
+	}
+
+/** Capital stock can be positive only for incumbents.
+**/
+FirmEntry::Reachable()	{ return CV(entrant)*CV(K) ? 0 : new FirmEntry() ;	}
+
+/** The one period return.
+<DD>
+<pre>U = </pre>
+</DD>
+**/
+FirmEntry::Utility()  {
+	decl ent = CV(entrant),
+		 u =
+		     ent*CV(ecost)+(1-ent)*CV(kcoef)*AV(K)
+		   | 0.0;
+	return u;
+	}

samples/Ox/ParallelObjective.ox

@@ -0,0 +1,63 @@
+/** Client and Server classes for parallel optimization using CFMPI.**/
+#include "ParallelObjective.h"
+
+/** Set up MPI Client-Server support for objective optimization.
+@param obj `Objective' to parallelize
+@param DONOTUSECLIENT TRUE (default): client node does no object evaluation<br>FALSE after putting servers to work Client node does one evaluation.
+**/
+ParallelObjective(obj,DONOTUSECLIENT) {
+	if (isclass(obj.p2p)) {oxwarning("P2P object already exists for "+obj.L+". Nothing changed"); return;}
+	obj.p2p = new P2P(DONOTUSECLIENT,new ObjClient(obj),new ObjServer(obj));
+	}
+
+ObjClient::ObjClient(obj) { this.obj = obj;    }
+
+ObjClient::Execute() {    }
+
+ObjServer::ObjServer(obj) {
+    this.obj = obj;
+    basetag = P2P::STOP_TAG+1;
+    iml = obj.NvfuncTerms;
+    Nparams = obj.nstruct;
+    }
+
+/** Wait on the objective client.
+**/
+ObjServer::Loop(nxtmsgsz) {
+    Nparams = nxtmsgsz;   //free param length is no greater than Nparams
+    if (Volume>QUIET) println("ObjServer server ",ID," Nparams ",Nparams);
+    Server::Loop(Nparams);
+    Recv(ANY_TAG);                      //receive the ending parameter vector
+    obj->Encode(Buffer[:Nparams-1]);   //encode it.
+    }
+
+/** Do the objective evaluation.
+Receive structural parameter vector and `Objective::Encode`() it.
+Call `Objective::vfunc`().
+@return Nparams (max. length of next expected message);
+**/
+ObjServer::Execute() {
+	obj->Decode(Buffer[:obj.nfree-1]);
+	Buffer = obj.cur.V[] = obj->vfunc();
+    if (Volume>QUIET) println("Server Executive: ",ID," vfunc[0]= ",Buffer[0]);
+	return obj.nstruct;
+	}
+
+CstrServer::CstrServer(obj) { ObjServer(obj);	}
+
+SepServer::SepServer(obj) { ObjServer(obj);	}
+
+CstrServer::Execute() {
+	obj->Encode(Buffer);
+	obj->Lagrangian(0);
+	return rows(Buffer = obj.cur->Vec());
+	}
+
+/** Separable objective evaluations.
+**/
+SepServer::Execute() {
+	obj.Kvar.v = imod(Tag-basetag,obj.K);
+	obj->Encode(Buffer,TRUE);
+	Buffer = obj.Kvar->PDF() * obj->vfunc();
+	return obj.NvfuncTerms;
+	}

samples/Ox/particle.oxo

@@ -0,0 +1,38 @@
+nldge::ParticleLogLikeli()
+{	decl it, ip,
+		 mss, mbas, ms, my, mx, vw, vwi, dws,
+		 mhi, mhdet, loglikeli, mData,
+		 vxm, vxs, mxm=<>, mxsu=<>, mxsl=<>,
+		 time, timeall, timeran=0, timelik=0, timefun=0, timeint=0, timeres=0;
+
+	mData = GetData(m_asY);
+	mhdet = sqrt((2*M_PI)^m_cY * determinant(m_mMSbE.^2));		// covariance determinant
+	mhi   = invert(m_mMSbE.^2);					// invert covariance of measurement shocks
+
+	ms 	  = m_vSss + zeros(m_cPar, m_cS);			// start particles
+	mx 	  = m_vXss + zeros(m_cPar, m_cX);			// steady state of state and policy
+
+	loglikeli = 0;							// init likelihood
+																								//timeall=timer();
+	for(it = 0; it < sizer(mData); it++)
+	{
+		mss = rann(m_cPar, m_cSS) * m_mSSbE;			// state noise
+		fg(&ms, ms, mx, mss);					// transition prior as proposal
+		mx = m_oApprox.FastInterpolate(ms); 			// interpolate
+		fy(&my, ms, mx, zeros(m_cPar, m_cMS));			// evaluate importance weights
+		my -= mData[it][];					// observation error
+
+		vw = exp(-0.5 * outer(my,mhi,'d')' )/mhdet;		// vw = exp(-0.5 * sumr(my*mhi .*my ) )/mhdet;
+
+		vw = vw .== .NaN .? 0 .: vw;				// no policy can happen for extrem particles
+		dws = sumc(vw);
+		if(dws==0) return -.Inf;				// or extremely wrong parameters
+		loglikeli += log(dws/m_cPar)	;			// loglikelihood contribution
+																										//timelik += (timer()-time)/100;
+																										//time=timer();
+		vwi = resample(vw/dws)-1;				// selection step in c++
+		ms = ms[vwi][];						// on normalized weights
+		mx = mx[vwi][];
+																	}
+	return loglikeli;
+}

samples/PHP/filenames/.php

@@ -0,0 +1,34 @@
+#!/usr/bin/env php
+<?
+$aMenuLinks = Array(
+	Array(
+		"Blog", 
+		SITE_DIR, 
+		Array(), 
+		Array(), 
+		"" 
+	),
+	Array(
+		"Photos", 
+		SITE_DIR."photo/", 
+		Array(), 
+		Array(), 
+		"" 
+	),
+	Array(
+		"About me", 
+		SITE_DIR."about.php", 
+		Array(), 
+		Array(), 
+		"" 
+	),
+	Array(
+		"Contact", 
+		SITE_DIR."contacts.php", 
+		Array(), 
+		Array(), 
+		"" 
+	),
+
+);
+?>

samples/Pan/test.pan

@@ -0,0 +1,54 @@
+object template pantest;
+
+# Very simple pan test file
+"/long/decimal" = 123;
+"/long/octal" = 0755;
+"/long/hexadecimal" = 0xFF;
+
+"/double/simple" = 0.01;
+"/double/pi" = 3.14159;
+"/double/exponent" = 1e-8;
+"/double/scientific" = 1.3E10;
+
+"/string/single" = 'Faster, but escapes like \t, \n and \x3d don''t work, but '' should work.';
+"/string/double" = "Slower, but escapes like \t, \n and \x3d do work";
+
+variable TEST = 2;
+
+"/x2" = to_string(TEST);
+"/x2" ?= 'Default value';
+
+"/x3" = 1 + 2 + value("/long/decimal");
+
+"/x4" = undef;
+
+"/x5" = null;
+
+variable e ?= error("Test error message");
+
+# include gmond config for services-monitoring
+include { 'site/ganglia/gmond/services-monitoring' };
+
+"/software/packages"=pkg_repl("httpd","2.2.3-43.sl5.3",PKG_ARCH_DEFAULT);
+"/software/packages"=pkg_repl("php");
+
+# Example function
+function show_things_view_for_stuff = {
+    thing = ARGV[0];
+    foreach( i; mything; STUFF ) {
+        if ( thing == mything ) {
+            return( true );
+        } else {
+            return SELF;
+        };
+    };
+    false;
+};
+
+variable HERE = <<EOF;
+; This example demonstrates an in-line heredoc style config file
+[main]
+awesome = true
+EOF
+
+variable small = false;#This should be highlighted normally again.

samples/Pike/Error.pmod

@@ -0,0 +1,38 @@
+#pike __REAL_VERSION__
+
+constant Generic = __builtin.GenericError;
+
+constant Index = __builtin.IndexError;
+
+constant BadArgument = __builtin.BadArgumentError;
+
+constant Math = __builtin.MathError;
+
+constant Resource = __builtin.ResourceError;
+
+constant Permission = __builtin.PermissionError;
+
+constant Decode = __builtin.DecodeError;
+
+constant Cpp = __builtin.CppError;
+
+constant Compilation = __builtin.CompilationError;
+
+constant MasterLoad = __builtin.MasterLoadError;
+
+constant ModuleLoad = __builtin.ModuleLoadError;
+
+//! Returns an Error object for any argument it receives. If the
+//! argument already is an Error object or is empty, it does nothing.
+object mkerror(mixed error)
+{
+  if (error == UNDEFINED)
+    return error;
+  if (objectp(error) && error->is_generic_error)
+    return error;
+  if (arrayp(error))
+    return Error.Generic(@error);
+  if (stringp(error))
+    return Error.Generic(error);
+  return Error.Generic(sprintf("%O", error));
+}

samples/Pike/FakeFile.pike

@@ -0,0 +1,360 @@
+#pike __REAL_VERSION__
+
+//! A string wrapper that pretends to be a @[Stdio.File] object
+//! in addition to some features of a @[Stdio.FILE] object.
+
+
+//! This constant can be used to distinguish a FakeFile object
+//! from a real @[Stdio.File] object.
+constant is_fake_file = 1;
+
+protected string data;
+protected int ptr;
+protected int(0..1) r;
+protected int(0..1) w;
+protected int mtime;
+
+protected function read_cb;
+protected function read_oob_cb;
+protected function write_cb;
+protected function write_oob_cb;
+protected function close_cb;
+
+//! @seealso
+//!   @[Stdio.File()->close()]
+int close(void|string direction) {
+  direction = lower_case(direction||"rw");
+  int cr = has_value(direction, "r");
+  int cw = has_value(direction, "w");
+
+  if(cr) {
+    r = 0;
+  }
+
+  if(cw) {
+    w = 0;
+  }
+
+  // FIXME: Close callback
+  return 1;
+}
+
+//! @decl void create(string data, void|string type, void|int pointer)
+//! @seealso
+//!   @[Stdio.File()->create()]
+void create(string _data, void|string type, int|void _ptr) {
+  if(!_data) error("No data string given to FakeFile.\n");
+  data = _data;
+  ptr = _ptr;
+  mtime = time();
+  if(type) {
+    type = lower_case(type);
+    if(has_value(type, "r"))
+      r = 1;
+    if(has_value(type, "w"))
+      w = 1;
+  }
+  else
+    r = w = 1;
+}
+
+protected string make_type_str() {
+  string type = "";
+  if(r) type += "r";
+  if(w) type += "w";
+  return type;
+}
+
+//! @seealso
+//!   @[Stdio.File()->dup()]
+this_program dup() {
+  return this_program(data, make_type_str(), ptr);
+}
+
+//! Always returns 0.
+//! @seealso
+//!   @[Stdio.File()->errno()]
+int errno() { return 0; }
+
+//! Returns size and the creation time of the string.
+Stdio.Stat stat() {
+  Stdio.Stat st = Stdio.Stat();
+  st->size = sizeof(data);
+  st->mtime=st->ctime=mtime;
+  st->atime=time();
+  return st;
+}
+
+//! @seealso
+//!   @[Stdio.File()->line_iterator()]
+String.SplitIterator line_iterator(int|void trim) {
+  if(trim)
+    return String.SplitIterator( data-"\r", '\n' );
+  return String.SplitIterator( data, '\n' );
+}
+
+protected mixed id;
+
+//! @seealso
+//!   @[Stdio.File()->query_id()]
+mixed query_id() { return id; }
+
+//! @seealso
+//!   @[Stdio.File()->set_id()]
+void set_id(mixed _id) { id = _id; }
+
+//! @seealso
+//!   @[Stdio.File()->read_function()]
+function(:string) read_function(int nbytes) {
+  return lambda() { return read(nbytes); };
+}
+
+//! @seealso
+//!   @[Stdio.File()->peek()]
+int(-1..1) peek(int|float|void timeout) {
+  if(!r) return -1;
+  if(ptr >= sizeof(data)) return 0;
+  return 1;
+}
+
+//! Always returns 0.
+//! @seealso
+//!   @[Stdio.File()->query_address()]
+string query_address(void|int(0..1) is_local) { return 0; }
+
+//! @seealso
+//!   @[Stdio.File()->read()]
+string read(void|int(0..) len, void|int(0..1) not_all) {
+  if(!r) return 0;
+  if (len < 0) error("Cannot read negative number of characters.\n");
+  int start=ptr;
+  ptr += len;
+  if(zero_type(len) || ptr>sizeof(data))
+    ptr = sizeof(data);
+
+  // FIXME: read callback
+  return data[start..ptr-1];
+}
+
+//! @seealso
+//!   @[Stdio.FILE()->gets()]
+string gets() {
+  if(!r) return 0;
+  string ret;
+  sscanf(data,"%*"+(string)ptr+"s%[^\n]",ret);
+  if(ret)
+  {
+    ptr+=sizeof(ret)+1;
+    if(ptr>sizeof(data))
+    {
+      ptr=sizeof(data);
+      if(!sizeof(ret))
+	ret = 0;
+    }
+  }
+
+  // FIXME: read callback
+  return ret;
+}
+
+//! @seealso
+//!   @[Stdio.FILE()->getchar()]
+int getchar() {
+  if(!r) return 0;
+  int c;
+  if(catch(c=data[ptr]))
+    c=-1;
+  else
+    ptr++;
+
+  // FIXME: read callback
+  return c;
+}
+
+//! @seealso
+//!   @[Stdio.FILE()->unread()]
+void unread(string s) {
+  if(!r) return;
+  if(data[ptr-sizeof(s)..ptr-1]==s)
+    ptr-=sizeof(s);
+  else
+  {
+    data=s+data[ptr..];
+    ptr=0;
+  }
+}
+
+//! @seealso
+//!   @[Stdio.File()->seek()]
+int seek(int pos, void|int mult, void|int add) {
+  if(mult)
+    pos = pos*mult+add;
+  if(pos<0)
+  {
+    pos = sizeof(data)+pos;
+    if( pos < 0 )
+	pos = 0;
+  }
+  ptr = pos;
+  if( ptr > strlen( data ) )
+      ptr = strlen(data);
+  return ptr;
+}
+
+//! Always returns 1.
+//! @seealso
+//!   @[Stdio.File()->sync()]
+int(1..1) sync() { return 1; }
+
+//! @seealso
+//!   @[Stdio.File()->tell()]
+int tell() { return ptr; }
+
+//! @seealso
+//!   @[Stdio.File()->truncate()]
+int(0..1) truncate(int length) {
+  data = data[..length-1];
+  return sizeof(data)==length;
+}
+
+//! @seealso
+//!   @[Stdio.File()->write()]
+int(-1..) write(string|array(string) str, mixed ... extra) {
+  if(!w) return -1;
+  if(arrayp(str)) str=str*"";
+  if(sizeof(extra)) str=sprintf(str, @extra);
+
+  if(ptr==sizeof(data)) {
+    data += str;
+    ptr = sizeof(data);
+  }
+  else if(sizeof(str)==1)
+    data[ptr++] = str[0];
+  else {
+    data = data[..ptr-1] + str + data[ptr+sizeof(str)..];
+    ptr += sizeof(str);
+  }
+
+  // FIXME: write callback
+  return sizeof(str);
+}
+
+//! @seealso
+//!   @[Stdio.File()->set_blocking]
+void set_blocking() {
+  close_cb = 0;
+  read_cb = 0;
+  read_oob_cb = 0;
+  write_cb = 0;
+  write_oob_cb = 0;
+}
+
+//! @seealso
+//!   @[Stdio.File()->set_blocking_keep_callbacks]
+void set_blocking_keep_callbacks() { }
+
+//! @seealso
+//!   @[Stdio.File()->set_blocking]
+void set_nonblocking(function rcb, function wcb, function ccb,
+		     function rocb, function wocb) {
+  read_cb = rcb;
+  write_cb = wcb;
+  close_cb = ccb;
+  read_oob_cb = rocb;
+  write_oob_cb = wocb;
+}
+
+//! @seealso
+//!   @[Stdio.File()->set_blocking_keep_callbacks]
+void set_nonblocking_keep_callbacks() { }
+
+
+//! @seealso
+//!   @[Stdio.File()->set_close_callback]
+void set_close_callback(function cb) { close_cb = cb; }
+
+//! @seealso
+//!   @[Stdio.File()->set_read_callback]
+void set_read_callback(function cb) { read_cb = cb; }
+
+//! @seealso
+//!   @[Stdio.File()->set_read_oob_callback]
+void set_read_oob_callback(function cb) { read_oob_cb = cb; }
+
+//! @seealso
+//!   @[Stdio.File()->set_write_callback]
+void set_write_callback(function cb) { write_cb = cb; }
+
+//! @seealso
+//!   @[Stdio.File()->set_write_oob_callback]
+void set_write_oob_callback(function cb) { write_oob_cb = cb; }
+
+
+//! @seealso
+//!   @[Stdio.File()->query_close_callback]
+function query_close_callback() { return close_cb; }
+
+//! @seealso
+//!   @[Stdio.File()->query_read_callback]
+function query_read_callback() { return read_cb; }
+
+//! @seealso
+//!   @[Stdio.File()->query_read_oob_callback]
+function query_read_oob_callback() { return read_oob_cb; }
+
+//! @seealso
+//!   @[Stdio.File()->query_write_callback]
+function query_write_callback() { return write_cb; }
+
+//! @seealso
+//!   @[Stdio.File()->query_write_oob_callback]
+function query_write_oob_callback() { return write_oob_cb; }
+
+string _sprintf(int t) {
+  return t=='O' && sprintf("%O(%d,%O)", this_program, sizeof(data),
+			   make_type_str());
+}
+
+
+// FakeFile specials.
+
+//! A FakeFile can be casted to a string.
+mixed cast(string to) {
+  switch(to) {
+  case "string": return data;
+  case "object": return this;
+  }
+  error("Can not cast object to %O.\n", to);
+}
+
+//! Sizeof on a FakeFile returns the size of its contents.
+int(0..) _sizeof() {
+  return sizeof(data);
+}
+
+//! @ignore
+
+#define NOPE(X) mixed X (mixed ... args) { error("This is a FakeFile. %s is not available.\n", #X); }
+NOPE(assign);
+NOPE(async_connect);
+NOPE(connect);
+NOPE(connect_unix);
+NOPE(open);
+NOPE(open_socket);
+NOPE(pipe);
+NOPE(tcgetattr);
+NOPE(tcsetattr);
+
+// Stdio.Fd
+NOPE(dup2);
+NOPE(lock); // We could implement this
+NOPE(mode); // We could implement this
+NOPE(proxy); // We could implement this
+NOPE(query_fd);
+NOPE(read_oob);
+NOPE(set_close_on_exec);
+NOPE(set_keepalive);
+NOPE(trylock); // We could implement this
+NOPE(write_oob);
+
+//! @endignore

samples/Prolog/format_spec.pl

@@ -0,0 +1,260 @@
+:- module(format_spec, [ format_error/2
+                       , format_spec/2
+                       , format_spec//1
+                       , spec_arity/2
+                       , spec_types/2
+                       ]).
+
+:- use_module(library(dcg/basics), [eos//0, integer//1, string_without//2]).
+:- use_module(library(error)).
+:- use_module(library(when), [when/2]).
+
+% TODO loading this module is optional
+% TODO it's for my own convenience during development
+%:- use_module(library(mavis)).
+
+%% format_error(+Goal, -Error:string) is nondet.
+%
+%  True if Goal exhibits an Error in its format string. The
+%  Error string describes what is wrong with Goal. Iterates each
+%  error on backtracking.
+%
+%  Goal may be one of the following predicates:
+%
+%    * format/2
+%    * format/3
+%    * debug/3
+format_error(format(Format,Args), Error) :-
+    format_error_(Format, Args,Error).
+format_error(format(_,Format,Args), Error) :-
+    format_error_(Format,Args,Error).
+format_error(debug(_,Format,Args), Error) :-
+    format_error_(Format,Args,Error).
+
+format_error_(Format,Args,Error) :-
+    format_spec(Format, Spec),
+    !,
+    is_list(Args),
+    spec_types(Spec, Types),
+    types_error(Args, Types, Error).
+format_error_(Format,_,Error) :-
+    % \+ format_spec(Format, _),
+    format(string(Error), "Invalid format string: ~q", [Format]).
+
+types_error(Args, Types, Error) :-
+    length(Types, TypesLen),
+    length(Args, ArgsLen),
+    TypesLen =\= ArgsLen,
+    !,
+    format( string(Error)
+          , "Wrong argument count. Expected ~d, got ~d"
+          , [TypesLen, ArgsLen]
+          ).
+types_error(Args, Types, Error) :-
+    types_error_(Args, Types, Error).
+
+types_error_([Arg|_],[Type|_],Error) :-
+    ground(Arg),
+    \+ is_of_type(Type,Arg),
+    message_to_string(error(type_error(Type,Arg),_Location),Error).
+types_error_([_|Args],[_|Types],Error) :-
+    types_error_(Args, Types, Error).
+
+
+% check/0 augmentation
+:- multifile check:checker/2.
+:- dynamic check:checker/2.
+check:checker(format_spec:checker, "format/2 strings and arguments").
+
+:- dynamic format_fail/3.
+
+checker :-
+    prolog_walk_code([ module_class([user])
+                     , infer_meta_predicates(false)
+                     , autoload(false)  % format/{2,3} are always loaded
+                     , undefined(ignore)
+                     , trace_reference(_)
+                     , on_trace(check_format)
+                     ]),
+    retract(format_fail(Goal,Location,Error)),
+    print_message(warning, format_error(Goal,Location,Error)),
+    fail.  % iterate all errors
+checker.  % succeed even if no errors are found
+
+check_format(Module:Goal, _Caller, Location) :-
+    predicate_property(Module:Goal, imported_from(Source)),
+    memberchk(Source, [system,prolog_debug]),
+    can_check(Goal),
+    format_error(Goal, Error),
+    assert(format_fail(Goal, Location, Error)),
+    fail.
+check_format(_,_,_).  % succeed to avoid printing goals
+
+% true if format_error/2 can check this goal
+can_check(Goal) :-
+    once(clause(format_error(Goal,_),_)).
+
+prolog:message(format_error(Goal,Location,Error)) -->
+    prolog:message_location(Location),
+    ['~n    In goal: ~q~n    ~s'-[Goal,Error]].
+
+
+%% format_spec(-Spec)//
+%
+%  DCG for parsing format strings. It doesn't yet generate format
+%  strings from a spec.  See format_spec/2 for details.
+format_spec([]) -->
+    eos.
+format_spec([escape(Numeric,Modifier,Action)|Rest]) -->
+    "~",
+    numeric_argument(Numeric),
+    modifier_argument(Modifier),
+    action(Action),
+    format_spec(Rest).
+format_spec([text(String)|Rest]) -->
+    { when((ground(String);ground(Codes)),string_codes(String, Codes)) },
+    string_without("~", Codes),
+    { Codes \= [] },
+    format_spec(Rest).
+
+
+%% format_spec(+Format, -Spec:list) is semidet.
+%
+%  Parse a format string.  Each element of Spec is one of the following:
+%
+%    * `text(Text)` - text sent to the output as is
+%    * `escape(Num,Colon,Action)` - a format escape
+%
+%  `Num` represents the optional numeric portion of an esape. `Colon`
+%  represents the optional colon in an escape. `Action` is an atom
+%  representing the action to be take by this escape.
+format_spec(Format, Spec) :-
+    when((ground(Format);ground(Codes)),text_codes(Format, Codes)),
+    once(phrase(format_spec(Spec), Codes, [])).
+
+%% spec_arity(+FormatSpec, -Arity:positive_integer) is det.
+%
+%  True if FormatSpec requires format/2 to have Arity arguments.
+spec_arity(Spec, Arity) :-
+    spec_types(Spec, Types),
+    length(Types, Arity).
+
+
+%% spec_types(+FormatSpec, -Types:list(type)) is det.
+%
+%  True if FormatSpec requires format/2 to have arguments of Types. Each
+%  value of Types is a type as described by error:has_type/2. This
+%  notion of types is compatible with library(mavis).
+spec_types(Spec, Types) :-
+    phrase(spec_types(Spec), Types).
+
+spec_types([]) -->
+    [].
+spec_types([Item|Items]) -->
+    item_types(Item),
+    spec_types(Items).
+
+item_types(text(_)) -->
+    [].
+item_types(escape(Numeric,_,Action)) -->
+    numeric_types(Numeric),
+    action_types(Action).
+
+numeric_types(number(_)) -->
+    [].
+numeric_types(character(_)) -->
+    [].
+numeric_types(star) -->
+    [number].
+numeric_types(nothing) -->
+    [].
+
+action_types(Action) -->
+    { atom_codes(Action, [Code]) },
+    { action_types(Code, Types) },
+    phrase(Types).
+
+
+%% text_codes(Text:text, Codes:codes).
+text_codes(Var, Codes) :-
+    var(Var),
+    !,
+    string_codes(Var, Codes).
+text_codes(Atom, Codes) :-
+    atom(Atom),
+    !,
+    atom_codes(Atom, Codes).
+text_codes(String, Codes) :-
+    string(String),
+    !,
+    string_codes(String, Codes).
+text_codes(Codes, Codes) :-
+    is_of_type(codes, Codes).
+
+
+numeric_argument(number(N)) -->
+    integer(N).
+numeric_argument(character(C)) -->
+    "`",
+    [C].
+numeric_argument(star) -->
+    "*".
+numeric_argument(nothing) -->
+    "".
+
+
+modifier_argument(colon) -->
+    ":".
+modifier_argument(no_colon) -->
+    \+ ":".
+
+
+action(Action) -->
+    [C],
+    { is_action(C) },
+    { atom_codes(Action, [C]) }.
+
+
+%% is_action(+Action:integer) is semidet.
+%% is_action(-Action:integer) is multi.
+%
+%  True if Action is a valid format/2 action character. Iterates all
+%  acceptable action characters, if Action is unbound.
+is_action(Action) :-
+    action_types(Action, _).
+
+%% action_types(?Action:integer, ?Types:list(type))
+%
+%  True if Action consumes arguments matching Types. An action (like
+%  `~`), which consumes no arguments, has `Types=[]`.  For example,
+%
+%      ?- action_types(0'~, Types).
+%      Types = [].
+%      ?- action_types(0'a, Types).
+%      Types = [atom].
+action_types(0'~, []).
+action_types(0'a, [atom]).
+action_types(0'c, [integer]).  % specifically, a code
+action_types(0'd, [integer]).
+action_types(0'D, [integer]).
+action_types(0'e, [float]).
+action_types(0'E, [float]).
+action_types(0'f, [float]).
+action_types(0'g, [float]).
+action_types(0'G, [float]).
+action_types(0'i, [any]).
+action_types(0'I, [integer]).
+action_types(0'k, [any]).
+action_types(0'n, []).
+action_types(0'N, []).
+action_types(0'p, [any]).
+action_types(0'q, [any]).
+action_types(0'r, [integer]).
+action_types(0'R, [integer]).
+action_types(0's, [text]).
+action_types(0'@, [callable]).
+action_types(0't, []).
+action_types(0'|, []).
+action_types(0'+, []).
+action_types(0'w, [any]).
+action_types(0'W, [any, list]).

samples/Prolog/func.pl

@@ -0,0 +1,194 @@
+:- module(func, [ op(675, xfy, ($))
+                , op(650, xfy, (of))
+                , ($)/2
+                , (of)/2
+                ]).
+:- use_module(library(list_util), [xfy_list/3]).
+:- use_module(library(function_expansion)).
+:- use_module(library(arithmetic)).
+:- use_module(library(error)).
+
+
+% true if the module whose terms are being read has specifically
+% imported library(func).
+wants_func :-
+    prolog_load_context(module, Module),
+    Module \== func,  % we don't want func sugar ourselves
+    predicate_property(Module:of(_,_),imported_from(func)).
+
+
+%%  compile_function(+Term, -In, -Out, -Goal) is semidet.
+%
+%   True if Term represents a function from In to Out
+%   implemented by calling Goal.  This multifile hook is
+%   called by $/2 and of/2 to convert a term into a goal.
+%   It's used at compile time for macro expansion.
+%   It's used at run time to handle functions which aren't
+%   known at compile time.
+%   When called as a hook, Term is guaranteed to be =nonvar=.
+%
+%   For example, to treat library(assoc) terms as functions which
+%   map a key to a value, one might define:
+%
+%       :- multifile compile_function/4.
+%       compile_function(Assoc, Key, Value, Goal) :-
+%           is_assoc(Assoc),
+%           Goal = get_assoc(Key, Assoc, Value).
+%
+%   Then one could write:
+%
+%       list_to_assoc([a-1, b-2, c-3], Assoc),
+%       Two = Assoc $ b,
+:- multifile compile_function/4.
+compile_function(Var, _, _, _) :-
+    % variables storing functions must be evaluated at run time
+    % and can't be compiled, a priori, into a goal
+    var(Var),
+    !,
+    fail.
+compile_function(Expr, In, Out, Out is Expr) :-
+    % arithmetic expression of one variable are simply evaluated
+    \+ string(Expr),  % evaluable/1 throws exception with strings
+    arithmetic:evaluable(Expr),
+    term_variables(Expr, [In]).
+compile_function(F, In, Out, func:Goal) :-
+    % composed functions
+    function_composition_term(F),
+    user:function_expansion(F, func:Functor, true),
+    Goal =.. [Functor,In,Out].
+compile_function(F, In, Out, Goal) :-
+    % string interpolation via format templates
+    format_template(F),
+    ( atom(F) ->
+        Goal = format(atom(Out), F, In)
+    ; string(F) ->
+        Goal = format(string(Out), F, In)
+    ; error:has_type(codes, F) ->
+        Goal = format(codes(Out), F, In)
+    ; fail  % to be explicit
+    ).
+compile_function(Dict, In, Out, Goal) :-
+    is_dict(Dict),
+    Goal = get_dict(In, Dict, Out).
+
+%%	$(+Function, +Argument) is det.
+%
+%	Apply Function to an Argument.  A Function is any predicate
+%	whose final argument generates output and whose penultimate argument
+%	accepts input.
+%
+%	This is realized by expanding function application to chained
+%	predicate calls at compile time.  Function application itself can
+%	be chained.
+%
+%	==
+%	Reversed = reverse $ sort $ [c,d,b].
+%	==
+:- meta_predicate $(2,+).
+$(_,_) :-
+    throw(error(permission_error(call, predicate, ($)/2),
+          context(_, '$/2 must be subject to goal expansion'))).
+
+user:function_expansion($(F,X), Y, Goal) :-
+    wants_func,
+    ( func:compile_function(F, X, Y, Goal) ->
+        true
+    ; var(F) -> Goal =      % defer until run time
+        ( func:compile_function(F, X, Y, P) ->
+            call(P)
+        ; call(F, X, Y)
+        )
+    ; Goal = call(F, X, Y)
+    ).
+
+
+%%	of(+F, +G) is det.
+%
+%	Creates a new function by composing F and G.  The functions are
+%	composed at compile time to create a new, compiled predicate which
+%	behaves like a function.  Function composition can be chained.
+%	Composed functions can also be applied with $/2.
+%
+%	==
+%	Reversed = reverse of sort $ [c,d,b].
+%	==
+:- meta_predicate of(2,2).
+of(_,_).
+
+
+%%  format_template(Format) is semidet.
+%
+%   True if Format is a template string suitable for format/3.
+%   The current check is very naive and should be improved.
+format_template(Format) :-
+    atom(Format), !,
+    atom_codes(Format, Codes),
+    format_template(Codes).
+format_template(Format) :-
+    string(Format),
+    !,
+    string_codes(Format, Codes),
+    format_template(Codes).
+format_template(Format) :-
+    error:has_type(codes, Format),
+    memberchk(0'~, Format).  % ' fix syntax highlighting
+
+
+% True if the argument is a function composition term
+function_composition_term(of(_,_)).
+
+% Converts a function composition term into a list of functions to compose
+functions_to_compose(Term, Funcs) :-
+    functor(Term, Op, 2),
+    Op = (of),
+    xfy_list(Op, Term, Funcs).
+
+% Thread a state variable through a list of functions.  This is similar
+% to a DCG expansion, but much simpler.
+thread_state([], [], Out, Out).
+thread_state([F|Funcs], [Goal|Goals], In, Out) :-
+    ( compile_function(F, In, Tmp, Goal) ->
+        true
+    ; var(F) ->
+        instantiation_error(F)
+    ; F =.. [Functor|Args],
+      append(Args, [In, Tmp], NewArgs),
+      Goal =.. [Functor|NewArgs]
+    ),
+    thread_state(Funcs, Goals, Tmp, Out).
+
+user:function_expansion(Term, func:Functor, true) :-
+    wants_func,
+    functions_to_compose(Term, Funcs),
+    debug(func, 'building composed function for: ~w', [Term]),
+    variant_sha1(Funcs, Sha),
+    format(atom(Functor), 'composed_function_~w', [Sha]),
+    debug(func, '  name: ~s', [Functor]),
+    ( func:current_predicate(Functor/2) ->
+        debug(func, '  composed predicate already exists', [])
+    ; true ->
+        reverse(Funcs, RevFuncs),
+        thread_state(RevFuncs, Threaded, In, Out),
+        xfy_list(',', Body, Threaded),
+        Head =.. [Functor, In, Out],
+        func:assert(Head :- Body),
+        func:compile_predicates([Functor/2])
+    ).
+
+
+% support foo(x,~,y) evaluation
+user:function_expansion(Term, Output, Goal) :-
+    wants_func,
+    compound(Term),
+
+    % has a single ~ argument
+    setof( X
+         , ( arg(X,Term,Arg), Arg == '~' )
+         , [N]
+         ),
+
+    % replace ~ with a variable
+    Term =.. [Name|Args0],
+    nth1(N, Args0, ~, Rest),
+    nth1(N, Args, Output, Rest),
+    Goal =.. [Name|Args].

samples/Propeller Spin/4x4 Keypad Reader.spin

@@ -0,0 +1,97 @@
+{{
+*****************************************
+* 4x4 Keypad Reader           v1.0      *
+* Author: Beau Schwabe                  *
+* Copyright (c) 2007 Parallax           *               
+* See end of file for terms of use.     *               
+*****************************************
+}}
+{
+
+Operation:
+
+This object uses a capacitive PIN approach to reading the keypad.
+To do so, ALL pins are made LOW and an OUTPUT to "discharge" the
+I/O pins.  Then, ALL pins are set to an INPUT state.  At this point,
+only one pin is made HIGH and an OUTPUT at a time.  If the "switch"
+is closed, then a HIGH will be read on the input, otherwise a LOW
+will be returned.
+
+The keypad decoding routine only requires two subroutines and returns
+the entire 4x4 keypad matrix into a single WORD variable indicating
+which buttons are pressed.  Multiple button presses are allowed with
+the understanding that“BOX entries can be confused. An example of a
+BOX entry... 1,2,4,5 or 1,4,3,6 or 4,6,*,#  etc. where any 3 of the 4
+buttons pressed will evaluate the non pressed button as being pressed,
+even when they are not.  There is no danger of any physical or
+electrical damage, that s just the way this sensing method happens to
+work.
+
+Schematic:
+No resistors, No capacitors.  The connections are directly from the
+keypad to the I/O's.  I literally plugged mine right into the demo
+board RevC.
+
+Looking at the Back of the 4x4 keypad...
+
+       P7         P0
+         ││││││││
+┌─────── ││││││││ ───────┐
+│     oo ││││││││ o      │
+│                        │
+│  O    O    O    O    O │ 
+│                        │
+│  O    O    O    O    O │
+│         {LABEL}        │
+│  O    O    O    O    O │ 
+│                        │
+│  O    O    O    O    O │
+│                        │
+│  O    O    O    O    O │
+│             o    o     │
+└────────────────────────┘
+
+}
+VAR
+  word  keypad
+  
+PUB ReadKeyPad
+    keypad := 0                 'Clear 4x4 'keypad' value
+    ReadRow(3)                  'Call routine to read entire ROW 0
+    keypad <<= 4                'Shift 'keypad' value left by 4
+    ReadRow(2)                  'Call routine to read entire ROW 1
+    keypad <<= 4                'Shift 'keypad' value left by 4
+    ReadRow(1)                  'Call routine to read entire ROW 2
+    keypad <<= 4                'Shift 'keypad' value left by 4
+    ReadRow(0)                  'Call routine to read entire ROW 3
+    Result := keypad
+
+PRI ReadRow(n)
+    outa[0..7]~                 'preset P0 to P7 as LOWs
+    dira[0..7]~~                'make P0 to P7 OUTPUTs ... discharge pins or "capacitors" to VSS
+    dira[0..7]~                 'make P0 to P7 INPUTSs ... now the pins act like tiny capacitors
+    outa[n]~~                   'preset Pin 'n' HIGH         
+    dira[n]~~                   'make Pin 'n' an OUTPUT... Make only one pin HIGH ; will charge
+                                '                          "capacitor" if switch is closed.
+                                ' 
+    keypad += ina[4..7]         'read ROW value        ... If a switch is open, the pin or "capacitor"
+    dira[n]~                    'make Pn an INPUT          will remain discharged
+    
+DAT
+{{
+┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│                                                   TERMS OF USE: MIT License                                                  │                                                            
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation    │ 
+│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,    │
+│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
+│is furnished to do so, subject to the following conditions:                                                                   │
+│                                                                                                                              │
+│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
+│                                                                                                                              │
+│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE          │
+│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR         │
+│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,   │
+│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                         │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
+}}    

samples/Propeller Spin/Debug_Lcd.spin

@@ -0,0 +1,181 @@
+''****************************************
+''*  Debug_Lcd v1.2                      *
+''*  Authors: Jon Williams, Jeff Martin  *
+''*  Copyright (c) 2006 Parallax, Inc.   *
+''*  See end of file for terms of use.   *
+''****************************************
+''
+'' Debugging wrapper for Serial_Lcd object
+''
+'' v1.2 - March 26, 2008 - Updated by Jeff Martin to conform to Propeller object initialization standards.
+'' v1.1 - April 29, 2006 - Updated by Jon Williams for consistency.
+''
+
+
+OBJ
+
+  lcd : "serial_lcd"                                    ' driver for Parallax Serial LCD
+  num : "simple_numbers"                                ' number to string conversion
+
+
+PUB init(pin, baud, lines) : okay
+
+'' Initializes serial LCD object
+'' -- returns true if all parameters okay
+
+  okay := lcd.init(pin, baud, lines) 
+
+
+PUB finalize
+
+'' Finalizes lcd object -- frees the pin (floats)
+
+  lcd.finalize
+
+  
+PUB putc(txbyte)
+
+'' Send a byte to the terminal
+
+  lcd.putc(txbyte)
+  
+  
+PUB str(strAddr)
+
+'' Print a zero-terminated string
+
+  lcd.str(strAddr)
+
+
+PUB dec(value)
+
+'' Print a signed decimal number
+
+  lcd.str(num.dec(value))  
+
+
+PUB decf(value, width) 
+
+'' Prints signed decimal value in space-padded, fixed-width field
+
+  lcd.str(num.decf(value, width))   
+  
+
+PUB decx(value, digits) 
+
+'' Prints zero-padded, signed-decimal string
+'' -- if value is negative, field width is digits+1
+
+  lcd.str(num.decx(value, digits)) 
+
+
+PUB hex(value, digits)
+
+'' Print a hexadecimal number
+
+  lcd.str(num.hex(value, digits))
+
+
+PUB ihex(value, digits)
+
+'' Print an indicated hexadecimal number
+
+  lcd.str(num.ihex(value, digits))   
+
+
+PUB bin(value, digits)
+
+'' Print a binary number
+
+  lcd.str(num.bin(value, digits))
+
+
+PUB ibin(value, digits)
+
+'' Print an indicated (%) binary number
+
+  lcd.str(num.ibin(value, digits))     
+    
+
+PUB cls
+
+'' Clears LCD and moves cursor to home (0, 0) position
+
+  lcd.cls 
+
+
+PUB home
+
+'' Moves cursor to 0, 0
+
+  lcd.home
+  
+
+PUB gotoxy(col, line)
+
+'' Moves cursor to col/line
+
+  lcd.gotoxy(col, line)
+
+  
+PUB clrln(line)
+
+'' Clears line
+
+  lcd.clrln(line)
+
+
+PUB cursor(type)
+
+'' Selects cursor type
+''   0 : cursor off, blink off  
+''   1 : cursor off, blink on   
+''   2 : cursor on, blink off  
+''   3 : cursor on, blink on
+
+  lcd.cursor(type)
+       
+
+PUB display(status)
+
+'' Controls display visibility; use display(false) to hide contents without clearing
+
+  if status
+    lcd.displayOn
+  else
+    lcd.displayOff
+
+
+PUB custom(char, chrDataAddr)
+
+'' Installs custom character map
+'' -- chrDataAddr is address of 8-byte character definition array
+
+  lcd.custom(char, chrDataAddr)
+
+      
+PUB backLight(status)
+
+'' Enable (true) or disable (false) LCD backlight
+'' -- affects only backlit models
+
+  lcd.backLight(status)
+
+{{
+
+┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│                                                   TERMS OF USE: MIT License                                                  │                                                            
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation    │ 
+│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,    │
+│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
+│is furnished to do so, subject to the following conditions:                                                                   │
+│                                                                                                                              │
+│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
+│                                                                                                                              │
+│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE          │
+│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR         │
+│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,   │
+│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                         │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
+}}  

samples/Propeller Spin/Inductor.spin

@@ -0,0 +1,221 @@
+{{
+*****************************************
+* Inductive Sensor Demo v1.0            *
+* Author: Beau Schwabe                  *
+* Copyright (c) 2007 Parallax           *
+* See end of file for terms of use.     *
+*****************************************
+
+
+Test Circuit:
+
+      10pF   100K  1M
+FPin ───┳──┳── SDF(sigma-delta feedback)
+          │      ┣──── SDI(sigma-delta input)
+        L   100K
+                     
+         GND    GND  
+                                 
+
+Test Coils:
+
+Wire used was the "Radio Shack Special" GREEN (about 27 gauge)
+
+25T (Coke Can form)    = 2.1MHz
+15T (Coke Can form)    = 3.9MHz
+ 5T (Coke Can form)    = 5.3MHz
+50T (BIC pen form)     = 3.2MHz
+
+
+
+How does it work?
+
+Note: The reported resonate frequency is NOT the actual resonate LC frequency.  Instead it is where the voltage produced from
+      the LC circuit was clipped.  
+
+      In the example circuit below:
+      
+             C     L
+        A ────┳──── GND
+                │ 
+                B         
+
+      When you apply a small voltage at a specific frequency to an LC circuit (at point "A") that is at or near the resonate
+      frequency of LC, it is not uncommon to measure 10's or 100's of times the amount of voltage (at point "B") that you are
+      applying to the LC circuit. (at point "A")
+
+
+      In the "Test Circuit" above, point "B" passes through a diode which then basically feeds a divide by 2 voltage divider:
+
+              100K 100K
+        B ───┳── GND
+                  │
+                  C
+
+      ...So in order see the sigma-delta ADC "clip" the frequency sweep result, the output from the LC circuit only needs
+      to generate about 6.6 Volts above ground. (0.6V drop across the diode, and since the ADC is only sensitive to about
+      3V, it works out to be about 6.6V after the voltage divider.)
+
+
+      A typical magnitude plot of a frequency sweep applied to an LC circuit might look something like this:
+      
+                    *
+                    *
+                    *
+                    *
+                   * *
+                  *   *
+                 *     *
+               *         *
+             *             *
+       *****                 *****
+
+
+       ...With 'clipping' the pattern looks more like this:
+
+                  X****
+                 *     *
+               *         *
+             *             *
+       *****                 *****
+
+       ...The 'X' denotes the location of the reported resonate frequency. The reason this is slightly off is for
+       two reasons really. 1) lazy - I didn't want to fiddle with the voltage divider combo... adjusting so that the
+       "peak" was also where the ADC happened to "clip".  2) some benefit - When you apply a frequency to a tuned LC
+       circuit that's resonate frequency is the same as the applied frequency, the LC acts like a dead short.  A
+       situation not exactly great for Propeller I/O's
+
+       Now that we have that out of the way, what happens next?  How can we use this so called "coil" as a sensor?
+
+       If a frequency sweep is initially preformed to determine the resonate frequency clip point, then it just so
+       happens that adding additional "metal" (<- Does not need to be ferrous) causes the resonate frequency to shift
+       to a HIGHER frequency.
+
+       Once you determine the "clip" frequency and you use one of the available counters to constantly feed that
+       particular frequency back to the LC circuit, the resulting ADC output is proportional and somewhat linear when
+       metal objects are introduced to the coil.
+
+       Assume frequency increases from Left to Right.  With a slight resonate shift to the right, the ADC reports a
+       lower "de-tuned" value because the voltage magnitude no longer "clips" at the reported resonate frequency.
+       Typical ranges are full scale between 65535 (no metal) and 0 (metal saturation)
+
+ 
+                          X    *****
+                              *     *
+ ADC reports value here --> *         *
+                          *             *
+                    *****                 *****
+
+                     Slight shift to the right
+
+       I also made mention that the response is somewhat linear. As the LC resonance shifts and the ADC value begins
+       to lower, the slope is steepest near the "clip" point.  Therefore, the slightest shift results in larger value
+       changes.  Since the coil is actually the least sensitive to metal the further away it is (Law of squares) and
+       most sensitive to metal the closer it is, the resulting combination acts to linearize the output. I need to
+       point out that some LC combinations will exhibit plateaus and other anomalies caused by varying parasitic circuit
+       conditions that will affect the overall output, so a little bit of trial and error is necessary to get things
+       the way you want them.
+
+}}
+OBJ
+   Freq   : "Synth"
+   ADC    : "ADC"
+   gr     : "graphics"
+   Num    : "Numbers"
+CON
+  FPin =                        0
+
+  UpperFrequency =              6_000_000
+  LowerFrequency =              2_000_000
+
+  bitmap_base = $2000
+  display_base = $5000
+
+VAR
+    long              FMax, FTemp, FValue, Frequency
+    
+PUB demo
+    'start and setup graphics
+    gr.start
+    gr.setup(16, 12, 128, 96, bitmap_base)
+
+    FindResonateFrequency
+
+    DisplayInductorValue
+
+PUB DisplayInductorValue | X
+    Freq.Synth("A", FPin, FValue)
+    repeat
+      ADC.SigmaDelta(@FTemp)
+
+'**************************************** Graphics Option Start *********************************************
+      'clear bitmap
+      gr.clear
+      'draw text
+      gr.textmode(1,1,7,5)
+      gr.colorwidth(1,0)
+      gr.text(0,90,string("Inductive Propeller Sensor"))
+
+      gr.colorwidth(1,5)
+      X := (65535 - FTemp )*200/65535
+      gr.plot(-100+X,15)
+
+      gr.textmode(1,1,7,%0000)
+      gr.colorwidth(1,0)
+      gr.text(-100,-20,string("Resonate Frequency ="))
+      gr.text(35,-20,Num.ToStr(FValue,10))
+
+      gr.text(-100,-36,string("ADC Frequency Response ="))
+      gr.text(65,-36,Num.ToStr(FTemp,10))
+
+      'copy bitmap to display
+      gr.copy(display_base)
+'**************************************** Graphics Option Finish *********************************************      
+
+PUB FindResonateFrequency | P
+    dira[FPin]                  := 1
+    
+    FMax := 0
+    repeat Frequency from LowerFrequency to UpperFrequency step 1000
+      Freq.Synth("A", FPin, Frequency)
+      ADC.SigmaDelta(@FTemp)
+
+      if FTemp > FMax
+         FMax := FTemp
+         FValue := Frequency
+'**************************************** Graphics Option Start *********************************************
+      P := (Frequency - LowerFrequency)*100/(UpperFrequency - LowerFrequency)
+
+      gr.colorwidth(1,5)
+      gr.plot(0,0)
+      gr.line(P,0)
+      gr.colorwidth(3,5)
+      gr.line(100,0)
+
+      gr.colorwidth(2,0)
+      gr.plot(P,(FTemp/1024)+10)
+      gr.colorwidth(0,1)
+      gr.plot(P+1,5)
+      gr.line(P+1,50)
+
+      gr.copy(display_base)
+'**************************************** Graphics Option Finish *********************************************
+
+DAT
+{{
+┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│                                                   TERMS OF USE: MIT License                                                  │
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation    │
+│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,    │
+│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
+│is furnished to do so, subject to the following conditions:                                                                   │
+│                                                                                                                              │
+│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
+│                                                                                                                              │
+│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE          │
+│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR         │
+│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,   │
+│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                         │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
+}}

samples/Propeller Spin/Keyboard.spin

@@ -0,0 +1,736 @@
+''***************************************
+''*  PS/2 Keyboard Driver v1.0.1        *
+''*  Author: Chip Gracey                *
+''*  Copyright (c) 2004 Parallax, Inc.  *
+''*  See end of file for terms of use.  *
+''***************************************
+
+{-----------------REVISION HISTORY-----------------
+ v1.0.1 - Updated 6/15/2006 to work with Propeller Tool 0.96}
+ 
+VAR
+
+  long  cog
+
+  long  par_tail        'key buffer tail        read/write      (19 contiguous longs)
+  long  par_head        'key buffer head        read-only
+  long  par_present     'keyboard present       read-only
+  long  par_states[8]   'key states (256 bits)  read-only
+  long  par_keys[8]     'key buffer (16 words)  read-only       (also used to pass initial parameters)
+
+
+PUB start(dpin, cpin) : okay
+
+'' Start keyboard driver - starts a cog
+'' returns false if no cog available
+''
+''   dpin  = data signal on PS/2 jack
+''   cpin  = clock signal on PS/2 jack
+''
+''     use 100-ohm resistors between pins and jack
+''     use 10K-ohm resistors to pull jack-side signals to VDD
+''     connect jack-power to 5V, jack-gnd to VSS
+''
+'' all lock-keys will be enabled, NumLock will be initially 'on',
+'' and auto-repeat will be set to 15cps with a delay of .5s
+
+  okay := startx(dpin, cpin, %0_000_100, %01_01000)
+
+
+PUB startx(dpin, cpin, locks, auto) : okay
+
+'' Like start, but allows you to specify lock settings and auto-repeat
+''
+''   locks = lock setup
+''           bit 6 disallows shift-alphas (case set soley by CapsLock)
+''           bits 5..3 disallow toggle of NumLock/CapsLock/ScrollLock state
+''           bits 2..0 specify initial state of NumLock/CapsLock/ScrollLock
+''           (eg. %0_001_100 = disallow ScrollLock, NumLock initially 'on')
+''
+''   auto  = auto-repeat setup
+''           bits 6..5 specify delay (0=.25s, 1=.5s, 2=.75s, 3=1s)
+''           bits 4..0 specify repeat rate (0=30cps..31=2cps)
+''           (eg %01_00000 = .5s delay, 30cps repeat)
+
+  stop
+  longmove(@par_keys, @dpin, 4)
+  okay := cog := cognew(@entry, @par_tail) + 1
+
+
+PUB stop
+
+'' Stop keyboard driver - frees a cog
+
+  if cog
+    cogstop(cog~ -  1)
+  longfill(@par_tail, 0, 19)
+
+
+PUB present : truefalse
+
+'' Check if keyboard present - valid ~2s after start
+'' returns t|f
+
+  truefalse := -par_present
+
+
+PUB key : keycode
+
+'' Get key (never waits)
+'' returns key (0 if buffer empty)
+
+  if par_tail <> par_head
+    keycode := par_keys.word[par_tail]
+    par_tail := ++par_tail & $F
+
+
+PUB getkey : keycode
+
+'' Get next key (may wait for keypress)
+'' returns key
+
+  repeat until (keycode := key)
+
+
+PUB newkey : keycode
+
+'' Clear buffer and get new key (always waits for keypress)
+'' returns key
+
+  par_tail := par_head
+  keycode := getkey
+
+
+PUB gotkey : truefalse
+
+'' Check if any key in buffer
+'' returns t|f
+
+  truefalse := par_tail <> par_head
+
+
+PUB clearkeys
+
+'' Clear key buffer
+
+  par_tail := par_head
+
+
+PUB keystate(k) : state
+
+'' Get the state of a particular key
+'' returns t|f
+
+  state := -(par_states[k >> 5] >> k & 1)
+
+
+DAT
+
+'******************************************
+'* Assembly language PS/2 keyboard driver *
+'******************************************
+
+                        org
+'
+'
+' Entry
+'
+entry                   movd    :par,#_dpin             'load input parameters _dpin/_cpin/_locks/_auto
+                        mov     x,par
+                        add     x,#11*4
+                        mov     y,#4
+:par                    rdlong  0,x
+                        add     :par,dlsb
+                        add     x,#4
+                        djnz    y,#:par
+
+                        mov     dmask,#1                'set pin masks
+                        shl     dmask,_dpin
+                        mov     cmask,#1
+                        shl     cmask,_cpin
+
+                        test    _dpin,#$20      wc      'modify port registers within code
+                        muxc    _d1,dlsb
+                        muxc    _d2,dlsb
+                        muxc    _d3,#1
+                        muxc    _d4,#1
+                        test    _cpin,#$20      wc
+                        muxc    _c1,dlsb
+                        muxc    _c2,dlsb
+                        muxc    _c3,#1
+
+                        mov     _head,#0                'reset output parameter _head
+'
+'
+' Reset keyboard
+'
+reset                   mov     dira,#0                 'reset directions
+                        mov     dirb,#0
+
+                        movd    :par,#_present          'reset output parameters _present/_states[8]
+                        mov     x,#1+8
+:par                    mov     0,#0
+                        add     :par,dlsb
+                        djnz    x,#:par
+
+                        mov     stat,#8                 'set reset flag
+'
+'
+' Update parameters
+'
+update                  movd    :par,#_head             'update output parameters _head/_present/_states[8]
+                        mov     x,par
+                        add     x,#1*4
+                        mov     y,#1+1+8
+:par                    wrlong  0,x
+                        add     :par,dlsb
+                        add     x,#4
+                        djnz    y,#:par
+
+                        test    stat,#8         wc      'if reset flag, transmit reset command
+        if_c            mov     data,#$FF
+        if_c            call    #transmit
+'
+'
+' Get scancode
+'
+newcode                 mov     stat,#0                 'reset state
+
+:same                   call    #receive                'receive byte from keyboard
+
+                        cmp     data,#$83+1     wc      'scancode?
+
+        if_nc           cmp     data,#$AA       wz      'powerup/reset?
+        if_nc_and_z     jmp     #configure
+
+        if_nc           cmp     data,#$E0       wz      'extended?
+        if_nc_and_z     or      stat,#1
+        if_nc_and_z     jmp     #:same
+
+        if_nc           cmp     data,#$F0       wz      'released?
+        if_nc_and_z     or      stat,#2
+        if_nc_and_z     jmp     #:same
+
+        if_nc           jmp     #newcode                'unknown, ignore
+'
+'
+' Translate scancode and enter into buffer
+'
+                        test    stat,#1         wc      'lookup code with extended flag
+                        rcl     data,#1
+                        call    #look
+
+                        cmp     data,#0         wz      'if unknown, ignore
+        if_z            jmp     #newcode
+
+                        mov     t,_states+6             'remember lock keys in _states
+
+                        mov     x,data                  'set/clear key bit in _states
+                        shr     x,#5
+                        add     x,#_states
+                        movd    :reg,x
+                        mov     y,#1
+                        shl     y,data
+                        test    stat,#2         wc
+:reg                    muxnc   0,y
+
+        if_nc           cmpsub  data,#$F0       wc      'if released or shift/ctrl/alt/win, done
+        if_c            jmp     #update
+
+                        mov     y,_states+7             'get shift/ctrl/alt/win bit pairs
+                        shr     y,#16
+
+                        cmpsub  data,#$E0       wc      'translate keypad, considering numlock
+        if_c            test    _locks,#%100    wz
+        if_c_and_z      add     data,#@keypad1-@table
+        if_c_and_nz     add     data,#@keypad2-@table
+        if_c            call    #look
+        if_c            jmp     #:flags
+
+                        cmpsub  data,#$DD       wc      'handle scrlock/capslock/numlock
+        if_c            mov     x,#%001_000
+        if_c            shl     x,data
+        if_c            andn    x,_locks
+        if_c            shr     x,#3
+        if_c            shr     t,#29                   'ignore auto-repeat
+        if_c            andn    x,t             wz
+        if_c            xor     _locks,x
+        if_c            add     data,#$DD
+        if_c_and_nz     or      stat,#4                 'if change, set configure flag to update leds
+
+                        test    y,#%11          wz      'get shift into nz
+
+        if_nz           cmp     data,#$60+1     wc      'check shift1
+        if_nz_and_c     cmpsub  data,#$5B       wc
+        if_nz_and_c     add     data,#@shift1-@table
+        if_nz_and_c     call    #look
+        if_nz_and_c     andn    y,#%11
+
+        if_nz           cmp     data,#$3D+1     wc      'check shift2
+        if_nz_and_c     cmpsub  data,#$27       wc
+        if_nz_and_c     add     data,#@shift2-@table
+        if_nz_and_c     call    #look
+        if_nz_and_c     andn    y,#%11
+
+                        test    _locks,#%010    wc      'check shift-alpha, considering capslock
+                        muxnc   :shift,#$20
+                        test    _locks,#$40     wc
+        if_nz_and_nc    xor     :shift,#$20
+                        cmp     data,#"z"+1     wc
+        if_c            cmpsub  data,#"a"       wc
+:shift  if_c            add     data,#"A"
+        if_c            andn    y,#%11
+
+:flags                  ror     data,#8                 'add shift/ctrl/alt/win flags
+                        mov     x,#4                    '+$100 if shift
+:loop                   test    y,#%11          wz      '+$200 if ctrl
+                        shr     y,#2                    '+$400 if alt
+        if_nz           or      data,#1                 '+$800 if win
+                        ror     data,#1
+                        djnz    x,#:loop
+                        rol     data,#12
+
+                        rdlong  x,par                   'if room in buffer and key valid, enter
+                        sub     x,#1
+                        and     x,#$F
+                        cmp     x,_head         wz
+        if_nz           test    data,#$FF       wz
+        if_nz           mov     x,par
+        if_nz           add     x,#11*4
+        if_nz           add     x,_head
+        if_nz           add     x,_head
+        if_nz           wrword  data,x
+        if_nz           add     _head,#1
+        if_nz           and     _head,#$F
+
+                        test    stat,#4         wc      'if not configure flag, done
+        if_nc           jmp     #update                 'else configure to update leds
+'
+'
+' Configure keyboard
+'
+configure               mov     data,#$F3               'set keyboard auto-repeat
+                        call    #transmit
+                        mov     data,_auto
+                        and     data,#%11_11111
+                        call    #transmit
+
+                        mov     data,#$ED               'set keyboard lock-leds
+                        call    #transmit
+                        mov     data,_locks
+                        rev     data,#-3 & $1F
+                        test    data,#%100      wc
+                        rcl     data,#1
+                        and     data,#%111
+                        call    #transmit
+
+                        mov     x,_locks                'insert locks into _states
+                        and     x,#%111
+                        shl     _states+7,#3
+                        or      _states+7,x
+                        ror     _states+7,#3
+
+                        mov     _present,#1             'set _present
+
+                        jmp     #update                 'done
+'
+'
+' Lookup byte in table
+'
+look                    ror     data,#2                 'perform lookup
+                        movs    :reg,data
+                        add     :reg,#table
+                        shr     data,#27
+                        mov     x,data
+:reg                    mov     data,0
+                        shr     data,x
+
+                        jmp     #rand                   'isolate byte
+'
+'
+' Transmit byte to keyboard
+'
+transmit
+_c1                     or      dira,cmask              'pull clock low
+                        movs    napshr,#13              'hold clock for ~128us (must be >100us)
+                        call    #nap
+_d1                     or      dira,dmask              'pull data low
+                        movs    napshr,#18              'hold data for ~4us
+                        call    #nap
+_c2                     xor     dira,cmask              'release clock
+
+                        test    data,#$0FF      wc      'append parity and stop bits to byte
+                        muxnc   data,#$100
+                        or      data,dlsb
+
+                        mov     x,#10                   'ready 10 bits
+transmit_bit            call    #wait_c0                'wait until clock low
+                        shr     data,#1         wc      'output data bit
+_d2                     muxnc   dira,dmask
+                        mov     wcond,c1                'wait until clock high
+                        call    #wait
+                        djnz    x,#transmit_bit         'another bit?
+
+                        mov     wcond,c0d0              'wait until clock and data low
+                        call    #wait
+                        mov     wcond,c1d1              'wait until clock and data high
+                        call    #wait
+
+                        call    #receive_ack            'receive ack byte with timed wait
+                        cmp     data,#$FA       wz      'if ack error, reset keyboard
+        if_nz           jmp     #reset
+
+transmit_ret            ret
+'
+'
+' Receive byte from keyboard
+'
+receive                 test    _cpin,#$20      wc      'wait indefinitely for initial clock low
+                        waitpne cmask,cmask
+receive_ack
+                        mov     x,#11                   'ready 11 bits
+receive_bit             call    #wait_c0                'wait until clock low
+                        movs    napshr,#16              'pause ~16us
+                        call    #nap
+_d3                     test    dmask,ina       wc      'input data bit
+                        rcr     data,#1
+                        mov     wcond,c1                'wait until clock high
+                        call    #wait
+                        djnz    x,#receive_bit          'another bit?
+
+                        shr     data,#22                'align byte
+                        test    data,#$1FF      wc      'if parity error, reset keyboard
+        if_nc           jmp     #reset
+rand                    and     data,#$FF               'isolate byte
+
+look_ret
+receive_ack_ret
+receive_ret             ret
+'
+'
+' Wait for clock/data to be in required state(s)
+'
+wait_c0                 mov     wcond,c0                '(wait until clock low)
+
+wait                    mov     y,tenms                 'set timeout to 10ms
+
+wloop                   movs    napshr,#18              'nap ~4us
+                        call    #nap
+_c3                     test    cmask,ina       wc      'check required state(s)
+_d4                     test    dmask,ina       wz      'loop until got state(s) or timeout
+wcond   if_never        djnz    y,#wloop                '(replaced with c0/c1/c0d0/c1d1)
+
+                        tjz     y,#reset                'if timeout, reset keyboard
+wait_ret
+wait_c0_ret             ret
+
+
+c0      if_c            djnz    y,#wloop                '(if_never replacements)
+c1      if_nc           djnz    y,#wloop
+c0d0    if_c_or_nz      djnz    y,#wloop
+c1d1    if_nc_or_z      djnz    y,#wloop
+'
+'
+' Nap
+'
+nap                     rdlong  t,#0                    'get clkfreq
+napshr                  shr     t,#18/16/13             'shr scales time
+                        min     t,#3                    'ensure waitcnt won't snag
+                        add     t,cnt                   'add cnt to time
+                        waitcnt t,#0                    'wait until time elapses (nap)
+
+nap_ret                 ret
+'
+'
+' Initialized data
+'
+'
+dlsb                    long    1 << 9
+tenms                   long    10_000 / 4
+'
+'
+' Lookup table
+'                               ascii   scan    extkey  regkey  ()=keypad
+'
+table                   word    $0000   '00
+                        word    $00D8   '01             F9
+                        word    $0000   '02
+                        word    $00D4   '03             F5
+                        word    $00D2   '04             F3
+                        word    $00D0   '05             F1
+                        word    $00D1   '06             F2
+                        word    $00DB   '07             F12
+                        word    $0000   '08
+                        word    $00D9   '09             F10
+                        word    $00D7   '0A             F8
+                        word    $00D5   '0B             F6
+                        word    $00D3   '0C             F4
+                        word    $0009   '0D             Tab
+                        word    $0060   '0E             `
+                        word    $0000   '0F
+                        word    $0000   '10
+                        word    $F5F4   '11     Alt-R   Alt-L
+                        word    $00F0   '12             Shift-L
+                        word    $0000   '13
+                        word    $F3F2   '14     Ctrl-R  Ctrl-L
+                        word    $0071   '15             q
+                        word    $0031   '16             1
+                        word    $0000   '17
+                        word    $0000   '18
+                        word    $0000   '19
+                        word    $007A   '1A             z
+                        word    $0073   '1B             s
+                        word    $0061   '1C             a
+                        word    $0077   '1D             w
+                        word    $0032   '1E             2
+                        word    $F600   '1F     Win-L
+                        word    $0000   '20
+                        word    $0063   '21             c
+                        word    $0078   '22             x
+                        word    $0064   '23             d
+                        word    $0065   '24             e
+                        word    $0034   '25             4
+                        word    $0033   '26             3
+                        word    $F700   '27     Win-R
+                        word    $0000   '28
+                        word    $0020   '29             Space
+                        word    $0076   '2A             v
+                        word    $0066   '2B             f
+                        word    $0074   '2C             t
+                        word    $0072   '2D             r
+                        word    $0035   '2E             5
+                        word    $CC00   '2F     Apps
+                        word    $0000   '30
+                        word    $006E   '31             n
+                        word    $0062   '32             b
+                        word    $0068   '33             h
+                        word    $0067   '34             g
+                        word    $0079   '35             y
+                        word    $0036   '36             6
+                        word    $CD00   '37     Power
+                        word    $0000   '38
+                        word    $0000   '39
+                        word    $006D   '3A             m
+                        word    $006A   '3B             j
+                        word    $0075   '3C             u
+                        word    $0037   '3D             7
+                        word    $0038   '3E             8
+                        word    $CE00   '3F     Sleep
+                        word    $0000   '40
+                        word    $002C   '41             ,
+                        word    $006B   '42             k
+                        word    $0069   '43             i
+                        word    $006F   '44             o
+                        word    $0030   '45             0
+                        word    $0039   '46             9
+                        word    $0000   '47
+                        word    $0000   '48
+                        word    $002E   '49             .
+                        word    $EF2F   '4A     (/)     /
+                        word    $006C   '4B             l
+                        word    $003B   '4C             ;
+                        word    $0070   '4D             p
+                        word    $002D   '4E             -
+                        word    $0000   '4F
+                        word    $0000   '50
+                        word    $0000   '51
+                        word    $0027   '52             '
+                        word    $0000   '53
+                        word    $005B   '54             [
+                        word    $003D   '55             =
+                        word    $0000   '56
+                        word    $0000   '57
+                        word    $00DE   '58             CapsLock
+                        word    $00F1   '59             Shift-R
+                        word    $EB0D   '5A     (Enter) Enter
+                        word    $005D   '5B             ]
+                        word    $0000   '5C
+                        word    $005C   '5D             \
+                        word    $CF00   '5E     WakeUp
+                        word    $0000   '5F
+                        word    $0000   '60
+                        word    $0000   '61
+                        word    $0000   '62
+                        word    $0000   '63
+                        word    $0000   '64
+                        word    $0000   '65
+                        word    $00C8   '66             BackSpace
+                        word    $0000   '67
+                        word    $0000   '68
+                        word    $C5E1   '69     End     (1)
+                        word    $0000   '6A
+                        word    $C0E4   '6B     Left    (4)
+                        word    $C4E7   '6C     Home    (7)
+                        word    $0000   '6D
+                        word    $0000   '6E
+                        word    $0000   '6F
+                        word    $CAE0   '70     Insert  (0)
+                        word    $C9EA   '71     Delete  (.)
+                        word    $C3E2   '72     Down    (2)
+                        word    $00E5   '73             (5)
+                        word    $C1E6   '74     Right   (6)
+                        word    $C2E8   '75     Up      (8)
+                        word    $00CB   '76             Esc
+                        word    $00DF   '77             NumLock
+                        word    $00DA   '78             F11
+                        word    $00EC   '79             (+)
+                        word    $C7E3   '7A     PageDn  (3)
+                        word    $00ED   '7B             (-)
+                        word    $DCEE   '7C     PrScr   (*)
+                        word    $C6E9   '7D     PageUp  (9)
+                        word    $00DD   '7E             ScrLock
+                        word    $0000   '7F
+                        word    $0000   '80
+                        word    $0000   '81
+                        word    $0000   '82
+                        word    $00D6   '83             F7
+
+keypad1                 byte    $CA, $C5, $C3, $C7, $C0, 0, $C1, $C4, $C2, $C6, $C9, $0D, "+-*/"
+
+keypad2                 byte    "0123456789.", $0D, "+-*/"
+
+shift1                  byte    "{|}", 0, 0, "~"
+
+shift2                  byte    $22, 0, 0, 0, 0, "<_>?)!@#$%^&*(", 0, ":", 0, "+"
+'
+'
+' Uninitialized data
+'
+dmask                   res     1
+cmask                   res     1
+stat                    res     1
+data                    res     1
+x                       res     1
+y                       res     1
+t                       res     1
+
+_head                   res     1       'write-only
+_present                res     1       'write-only
+_states                 res     8       'write-only
+_dpin                   res     1       'read-only at start
+_cpin                   res     1       'read-only at start
+_locks                  res     1       'read-only at start
+_auto                   res     1       'read-only at start
+
+''
+''
+''      _________
+''      Key Codes
+''
+''      00..DF  = keypress and keystate
+''      E0..FF  = keystate only
+''
+''
+''      09      Tab
+''      0D      Enter
+''      20      Space
+''      21      !
+''      22      "
+''      23      #
+''      24      $
+''      25      %
+''      26      &
+''      27      '
+''      28      (
+''      29      )
+''      2A      *
+''      2B      +
+''      2C      ,
+''      2D      -
+''      2E      .
+''      2F      /
+''      30      0..9
+''      3A      :
+''      3B      ;
+''      3C      <
+''      3D      =
+''      3E      >
+''      3F      ?
+''      40      @       
+''      41..5A  A..Z
+''      5B      [
+''      5C      \
+''      5D      ]
+''      5E      ^
+''      5F      _
+''      60      `
+''      61..7A  a..z
+''      7B      {
+''      7C      |
+''      7D      }
+''      7E      ~
+''
+''      80-BF   (future international character support)
+''
+''      C0      Left Arrow
+''      C1      Right Arrow
+''      C2      Up Arrow
+''      C3      Down Arrow
+''      C4      Home
+''      C5      End
+''      C6      Page Up
+''      C7      Page Down
+''      C8      Backspace
+''      C9      Delete
+''      CA      Insert
+''      CB      Esc
+''      CC      Apps
+''      CD      Power
+''      CE      Sleep
+''      CF      Wakeup
+''
+''      D0..DB  F1..F12
+''      DC      Print Screen
+''      DD      Scroll Lock
+''      DE      Caps Lock
+''      DF      Num Lock
+''
+''      E0..E9  Keypad 0..9
+''      EA      Keypad .
+''      EB      Keypad Enter
+''      EC      Keypad +
+''      ED      Keypad -
+''      EE      Keypad *
+''      EF      Keypad /
+''
+''      F0      Left Shift
+''      F1      Right Shift
+''      F2      Left Ctrl
+''      F3      Right Ctrl
+''      F4      Left Alt
+''      F5      Right Alt
+''      F6      Left Win
+''      F7      Right Win
+''
+''      FD      Scroll Lock State
+''      FE      Caps Lock State
+''      FF      Num Lock State
+''
+''      +100    if Shift
+''      +200    if Ctrl
+''      +400    if Alt
+''      +800    if Win
+''
+''      eg. Ctrl-Alt-Delete = $6C9
+''
+''
+'' Note: Driver will buffer up to 15 keystrokes, then ignore overflow.
+
+{{
+
+┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│                                                   TERMS OF USE: MIT License                                                  │                                                            
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation    │ 
+│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,    │
+│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
+│is furnished to do so, subject to the following conditions:                                                                   │
+│                                                                                                                              │
+│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
+│                                                                                                                              │
+│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE          │
+│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR         │
+│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,   │
+│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                         │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
+}}

samples/Propeller Spin/TV.spin

@@ -0,0 +1,711 @@
+''***************************************
+''*  TV Driver v1.1                     *
+''*  Author: Chip Gracey                *
+''*  Copyright (c) 2004 Parallax, Inc.  *               
+''*  See end of file for terms of use.  *               
+''***************************************
+
+' v1.0 - 01 May 2006 - original version
+' v1.1 - 17 May 2006 - pixel tile size can now be 16 x 32 to enable more efficient
+'                       character displays utilizing the internal font - see 'tv_mode'
+
+
+CON
+
+  fntsc         = 3_579_545     'NTSC color frequency
+  lntsc         = 3640          'NTSC color cycles per line * 16
+  sntsc         = 624           'NTSC color cycles per sync * 16
+
+  fpal          = 4_433_618     'PAL color frequency
+  lpal          = 4540          'PAL color cycles per line * 16
+  spal          = 848           'PAL color cycles per sync * 16
+
+  paramcount    = 14
+  colortable    = $180          'start of colortable inside cog
+  
+
+VAR
+
+  long  cog
+
+
+PUB start(tvptr) : okay
+
+'' Start TV driver - starts a cog
+'' returns false if no cog available
+''
+''   tvptr = pointer to TV parameters
+
+  stop
+  okay := cog := cognew(@entry, tvptr) + 1
+
+
+PUB stop
+
+'' Stop TV driver - frees a cog
+
+  if cog
+    cogstop(cog~ - 1)
+
+
+DAT
+
+'*******************************
+'* Assembly language TV driver *
+'*******************************
+
+                        org
+'
+'
+' Entry
+'
+entry                   mov     taskptr,#tasks          'reset tasks
+
+                        mov     x,#10                   'perform task sections initially
+:init                   jmpret  taskret,taskptr
+                        djnz    x,#:init
+'
+'
+' Superfield
+'
+superfield              mov     taskptr,#tasks          'reset tasks
+
+                        test    _mode,#%0001    wc      'if ntsc, set phaseflip
+        if_nc           mov     phaseflip,phasemask
+
+                        test    _mode,#%0010    wz      'get interlace into nz
+'
+'
+' Field
+'
+field                   mov     x,vinv                  'do invisible back porch lines
+:black                  call    #hsync                  'do hsync
+                        waitvid burst,sync_high2        'do black
+                        jmpret  taskret,taskptr         'call task section (z undisturbed)
+                        djnz    x,#:black               'another black line?
+
+                        wrlong  visible,par             'set status to visible
+
+                        mov     x,vb                    'do visible back porch lines
+                        call    #blank_lines
+
+                        mov     screen,_screen          'point to first tile (upper-leftmost)
+                        mov     y,_vt                   'set vertical tiles
+:line                   mov     vx,_vx                  'set vertical expand
+:vert   if_z            xor     interlace,#1            'interlace skip?
+        if_z            tjz     interlace,#:skip
+
+                        call    #hsync                  'do hsync
+
+                        mov     vscl,hb                 'do visible back porch pixels
+                        xor     tile,colortable
+                        waitvid tile,#0
+
+                        mov     x,_ht                   'set horizontal tiles
+                        mov     vscl,hx                 'set horizontal expand
+
+:tile                   rdword  tile,screen             'read tile
+                        or      tile,line               'set pointer bits into tile
+                        rol     tile,#6                 'read tile pixels
+                        rdlong  pixels,tile             '(2 instructions between reads)
+                        shr     tile,#10+6              'set tile colors
+                        movs    :color,tile
+                        add     screen,#2               'point to next tile
+                        mov     tile,phaseflip
+:color                  xor     tile,colortable
+                        waitvid tile,pixels             'pass colors and pixels to video
+                        djnz    x,#:tile                'another tile?
+
+                        sub     screen,hc2x             'repoint to first tile in same line
+
+                        mov     vscl,hf                 'do visible front porch pixels
+                        mov     tile,phaseflip
+                        xor     tile,colortable
+                        waitvid tile,#0
+
+:skip                   djnz    vx,#:vert               'vertical expand?
+                        ror     line,linerot            'set next line
+                        add     line,lineadd    wc
+                        rol     line,linerot      
+        if_nc           jmp     #:line
+                        add     screen,hc2x             'point to first tile in next line
+                        djnz    y,#:line                'another tile line?
+
+        if_z            xor     interlace,#1    wz      'get interlace and field1 into z
+
+                        test    _mode,#%0001    wc      'do visible front porch lines
+                        mov     x,vf
+        if_nz_and_c     add     x,#1
+                        call    #blank_lines
+
+        if_nz           wrlong  invisible,par           'unless interlace and field1, set status to invisible
+
+        if_z_eq_c       call    #hsync                  'if required, do short line
+        if_z_eq_c       mov     vscl,hrest
+        if_z_eq_c       waitvid burst,sync_high2
+        if_z_eq_c       xor     phaseflip,phasemask
+
+                        call    #vsync_high             'do high vsync pulses
+
+                        movs    vsync1,#sync_low1       'do low vsync pulses
+                        movs    vsync2,#sync_low2
+                        call    #vsync_low
+
+                        call    #vsync_high             'do high vsync pulses
+
+        if_nz           mov     vscl,hhalf              'if odd frame, do half line
+        if_nz           waitvid burst,sync_high2
+
+        if_z            jmp     #field                  'if interlace and field1, display field2
+                        jmp     #superfield             'else, new superfield
+'
+'
+' Blank lines
+'
+blank_lines             call    #hsync                  'do hsync
+
+                        xor     tile,colortable         'do background
+                        waitvid tile,#0
+
+                        djnz    x,#blank_lines
+
+blank_lines_ret         ret
+'
+'
+' Horizontal sync
+'
+hsync                   test    _mode,#%0001    wc      'if pal, toggle phaseflip
+        if_c            xor     phaseflip,phasemask
+
+                        mov     vscl,sync_scale1        'do hsync       
+                        mov     tile,phaseflip
+                        xor     tile,burst
+                        waitvid tile,sync_normal
+
+                        mov     vscl,hvis               'setup in case blank line
+                        mov     tile,phaseflip
+
+hsync_ret               ret
+'
+'
+' Vertical sync
+'
+vsync_high              movs    vsync1,#sync_high1      'vertical sync
+                        movs    vsync2,#sync_high2
+
+vsync_low               mov     x,vrep
+
+vsyncx                  mov     vscl,sync_scale1
+vsync1                  waitvid burst,sync_high1
+
+                        mov     vscl,sync_scale2
+vsync2                  waitvid burst,sync_high2
+
+                        djnz    x,#vsyncx
+vsync_low_ret
+vsync_high_ret          ret
+'
+'
+' Tasks - performed in sections during invisible back porch lines
+'
+tasks                   mov     t1,par                  'load parameters
+                        movd    :par,#_enable           '(skip _status)
+                        mov     t2,#paramcount - 1
+:load                   add     t1,#4
+:par                    rdlong  0,t1
+                        add     :par,d0
+                        djnz    t2,#:load               '+119
+
+                        mov     t1,_pins                'set video pins and directions
+                        test    t1,#$08         wc
+        if_nc           mov     t2,pins0
+        if_c            mov     t2,pins1
+                        test    t1,#$40         wc
+                        shr     t1,#1
+                        shl     t1,#3
+                        shr     t2,t1
+                        movs    vcfg,t2
+                        shr     t1,#6
+                        movd    vcfg,t1
+                        shl     t1,#3
+                        and     t2,#$FF
+                        shl     t2,t1
+        if_nc           mov     dira,t2
+        if_nc           mov     dirb,#0
+        if_c            mov     dira,#0
+        if_c            mov     dirb,t2                 '+18
+
+                        tjz     _enable,#disabled       '+2, disabled?
+
+                        jmpret  taskptr,taskret         '+1=140, break and return later
+
+                        movs    :rd,#wtab               'load ntsc/pal metrics from word table
+                        movd    :wr,#hvis
+                        mov     t1,#wtabx - wtab
+                        test    _mode,#%0001    wc
+:rd                     mov     t2,0
+                        add     :rd,#1
+        if_nc           shl     t2,#16
+                        shr     t2,#16
+:wr                     mov     0,t2
+                        add     :wr,d0
+                        djnz    t1,#:rd                 '+54
+
+        if_nc           movs    :ltab,#ltab             'load ntsc/pal metrics from long table
+        if_c            movs    :ltab,#ltab+1
+                        movd    :ltab,#fcolor
+                        mov     t1,#(ltabx - ltab) >> 1
+:ltab                   mov     0,0
+                        add     :ltab,d0s1
+                        djnz    t1,#:ltab               '+17
+
+                        rdlong  t1,#0                   'get CLKFREQ
+                        shr     t1,#1                   'if CLKFREQ < 16MHz, cancel _broadcast
+                        cmp     t1,m8           wc
+        if_c            mov     _broadcast,#0
+                        shr     t1,#1                   'if CLKFREQ < color frequency * 4, disable
+                        cmp     t1,fcolor       wc
+        if_c            jmp     #disabled               '+11
+
+                        jmpret  taskptr,taskret         '+1=83, break and return later
+
+                        mov     t1,fcolor               'set ctra pll to fcolor * 16
+                        call    #divide                 'if ntsc, set vco to fcolor * 32 (114.5454 MHz)
+                        test    _mode,#%0001    wc      'if pal, set vco to fcolor * 16 (70.9379 MHz)
+        if_c            movi    ctra,#%00001_111        'select fcolor * 16 output (ntsc=/2, pal=/1)
+        if_nc           movi    ctra,#%00001_110
+        if_nc           shl     t2,#1
+                        mov     frqa,t2                 '+147
+
+                        jmpret  taskptr,taskret         '+1=148, break and return later
+
+                        mov     t1,_broadcast           'set ctrb pll to _broadcast
+                        mov     t2,#0                   'if 0, turn off ctrb
+                        tjz     t1,#:off
+                        min     t1,m8                   'limit from 8MHz to 128MHz
+                        max     t1,m128
+                        mov     t2,#%00001_100          'adjust _broadcast to be within 4MHz-8MHz
+:scale                  shr     t1,#1                   '(vco will be within 64MHz-128MHz)
+                        cmp     m8,t1           wc
+        if_c            add     t2,#%00000_001
+        if_c            jmp     #:scale
+:off                    movi    ctrb,t2
+                        call    #divide
+                        mov     frqb,t2                 '+165
+
+                        jmpret  taskptr,taskret         '+1=166, break and return later
+
+                        mov     t1,#%10100_000          'set video configuration
+                        test    _pins,#$01      wc      '(swap broadcast/baseband output bits?)
+        if_c            or      t1,#%01000_000
+                        test    _mode,#%1000    wc      '(strip chroma from broadcast?)
+        if_nc           or      t1,#%00010_000
+                        test    _mode,#%0100    wc      '(strip chroma from baseband?)
+        if_nc           or      t1,#%00001_000
+                        and     _auralcog,#%111         '(set aural cog)
+                        or      t1,_auralcog
+                        movi    vcfg,t1                 '+10
+
+                        mov     hx,_hx                  'compute horizontal metrics
+                        shl     hx,#8
+                        or      hx,_hx
+                        shl     hx,#4
+
+                        mov     hc2x,_ht
+                        shl     hc2x,#1
+
+                        mov     t1,_ht
+                        mov     t2,_hx
+                        call    #multiply
+                        mov     hf,hvis
+                        sub     hf,t1
+                        shr     hf,#1           wc
+                        mov     hb,_ho
+                        addx    hb,hf
+                        sub     hf,_ho                  '+52
+
+                        mov     t1,_vt                  'compute vertical metrics
+                        mov     t2,_vx
+                        call    #multiply
+                        test    _mode,#%10000   wc      'consider tile size
+                        muxc    linerot,#1
+                        mov     lineadd,lineinc
+        if_c            shr     lineadd,#1
+        if_c            shl     t1,#1
+                        test    _mode,#%0010    wc      'consider interlace
+        if_c            shr     t1,#1
+                        mov     vf,vvis
+                        sub     vf,t1
+                        shr     vf,#1           wc
+                        neg     vb,_vo
+                        addx    vb,vf
+                        add     vf,_vo                  '+53
+
+                        xor     _mode,#%0010            '+1, flip interlace bit for display
+
+:colors                 jmpret  taskptr,taskret         '+1=117/160, break and return later
+
+                        mov     t1,#13                  'load next 13 colors into colortable
+:colorloop              mov     t2,:colorreg            '5 times = 65 (all 64 colors loaded)
+                        shr     t2,#9-2
+                        and     t2,#$FC
+                        add     t2,_colors
+:colorreg               rdlong  colortable,t2
+                        add     :colorreg,d0
+                        andn    :colorreg,d6
+                        djnz    t1,#:colorloop          '+158
+
+                        jmp     #:colors                '+1, keep loading colors
+'
+'
+' Divide t1/CLKFREQ to get frqa or frqb value into t2
+'
+divide                  rdlong  m1,#0                   'get CLKFREQ
+
+                        mov     m2,#32+1
+:loop                   cmpsub  t1,m1           wc
+                        rcl     t2,#1
+                        shl     t1,#1
+                        djnz    m2,#:loop
+
+divide_ret              ret                             '+140
+'
+'
+' Multiply t1 * t2 * 16 (t1, t2 = bytes)
+'
+multiply                shl     t2,#8+4-1
+
+                        mov     m1,#8
+:loop                   shr     t1,#1           wc
+        if_c            add     t1,t2
+                        djnz    m1,#:loop
+
+multiply_ret            ret                             '+37
+'
+'
+' Disabled - reset status, nap ~4ms, try again
+'
+disabled                mov     ctra,#0                 'reset ctra
+                        mov     ctrb,#0                 'reset ctrb
+                        mov     vcfg,#0                 'reset video
+
+                        wrlong  outa,par                'set status to disabled
+
+                        rdlong  t1,#0                   'get CLKFREQ
+                        shr     t1,#8                   'nap for ~4ms
+                        min     t1,#3
+                        add     t1,cnt
+                        waitcnt t1,#0
+
+                        jmp     #entry                  'reload parameters
+'
+'
+' Initialized data
+'
+m8                      long    8_000_000
+m128                    long    128_000_000
+d0                      long    1 << 9 << 0
+d6                      long    1 << 9 << 6
+d0s1                    long    1 << 9 << 0 + 1 << 1
+interlace               long    0
+invisible               long    1
+visible                 long    2
+phaseflip               long    $00000000
+phasemask               long    $F0F0F0F0
+line                    long    $00060000
+lineinc                 long    $10000000
+linerot                 long    0
+pins0                   long    %11110000_01110000_00001111_00000111
+pins1                   long    %11111111_11110111_01111111_01110111
+sync_high1              long    %0101010101010101010101_101010_0101
+sync_high2              long    %01010101010101010101010101010101       'used for black
+sync_low1               long    %1010101010101010101010101010_0101
+sync_low2               long    %01_101010101010101010101010101010
+'
+'
+' NTSC/PAL metrics tables
+'                               ntsc                    pal
+'                               ----------------------------------------------
+wtab                    word    lntsc - sntsc,          lpal - spal     'hvis
+                        word    lntsc / 2 - sntsc,      lpal / 2 - spal 'hrest
+                        word    lntsc / 2,              lpal / 2        'hhalf
+                        word    243,                    286             'vvis
+                        word    10,                     18              'vinv
+                        word    6,                      5               'vrep
+                        word    $02_8A,                 $02_AA          'burst
+wtabx
+ltab                    long    fntsc                                   'fcolor
+                        long    fpal
+                        long    sntsc >> 4 << 12 + sntsc                'sync_scale1
+                        long    spal >> 4 << 12 + spal
+                        long    67 << 12 + lntsc / 2 - sntsc            'sync_scale2
+                        long    79 << 12 + lpal / 2 - spal
+                        long    %0101_00000000_01_10101010101010_0101   'sync_normal
+                        long    %010101_00000000_01_101010101010_0101
+ltabx
+'
+'
+' Uninitialized data
+'
+taskptr                 res     1                       'tasks
+taskret                 res     1
+t1                      res     1
+t2                      res     1
+m1                      res     1
+m2                      res     1
+
+x                       res     1                       'display
+y                       res     1
+hf                      res     1
+hb                      res     1
+vf                      res     1
+vb                      res     1
+hx                      res     1
+vx                      res     1
+hc2x                    res     1
+screen                  res     1
+tile                    res     1
+pixels                  res     1
+lineadd                 res     1
+
+hvis                    res     1                       'loaded from word table
+hrest                   res     1
+hhalf                   res     1
+vvis                    res     1
+vinv                    res     1
+vrep                    res     1
+burst                   res     1
+
+fcolor                  res     1                       'loaded from long table
+sync_scale1             res     1
+sync_scale2             res     1
+sync_normal             res     1
+'
+'
+' Parameter buffer
+'
+_enable                 res     1       '0/non-0        read-only
+_pins                   res     1       '%pppmmmm       read-only
+_mode                   res     1       '%tccip         read-only
+_screen                 res     1       '@word          read-only
+_colors                 res     1       '@long          read-only
+_ht                     res     1       '1+             read-only
+_vt                     res     1       '1+             read-only
+_hx                     res     1       '4+             read-only
+_vx                     res     1       '1+             read-only
+_ho                     res     1       '0+-            read-only
+_vo                     res     1       '0+-            read-only
+_broadcast              res     1       '0+             read-only
+_auralcog               res     1       '0-7            read-only
+
+                        fit     colortable              'fit underneath colortable ($180-$1BF)
+''
+''___
+''VAR                   'TV parameters - 14 contiguous longs
+''
+''  long  tv_status     '0/1/2 = off/invisible/visible              read-only
+''  long  tv_enable     '0/non-0 = off/on                           write-only
+''  long  tv_pins       '%pppmmmm = pin group, pin group mode       write-only
+''  long  tv_mode       '%tccip = tile,chroma,interlace,ntsc/pal    write-only
+''  long  tv_screen     'pointer to screen (words)                  write-only      
+''  long  tv_colors     'pointer to colors (longs)                  write-only                            
+''  long  tv_ht         'horizontal tiles                           write-only                            
+''  long  tv_vt         'vertical tiles                             write-only                            
+''  long  tv_hx         'horizontal tile expansion                  write-only                            
+''  long  tv_vx         'vertical tile expansion                    write-only                            
+''  long  tv_ho         'horizontal offset                          write-only                            
+''  long  tv_vo         'vertical offset                            write-only                            
+''  long  tv_broadcast  'broadcast frequency (Hz)                   write-only                            
+''  long  tv_auralcog   'aural fm cog                               write-only                            
+''                                                                                              
+''The preceding VAR section may be copied into your code.        
+''After setting variables, do start(@tv_status) to start driver. 
+''                                                               
+''All parameters are reloaded each superframe, allowing you to make live
+''changes. To minimize flicker, correlate changes with tv_status.
+''
+''Experimentation may be required to optimize some parameters.
+''
+''Parameter descriptions:
+''  _________
+''  tv_status
+''
+''    driver sets this to indicate status:
+''      0: driver disabled (tv_enable = 0 or CLKFREQ < requirement)
+''      1: currently outputting invisible sync data
+''      2: currently outputting visible screen data
+''  _________
+''  tv_enable
+''
+''        0: disable (pins will be driven low, reduces power)
+''    non-0: enable
+''  _______
+''  tv_pins
+''
+''    bits 6..4 select pin group:
+''      %000: pins 7..0
+''      %001: pins 15..8
+''      %010: pins 23..16
+''      %011: pins 31..24
+''      %100: pins 39..32
+''      %101: pins 47..40
+''      %110: pins 55..48
+''      %111: pins 63..56
+''
+''    bits 3..0 select pin group mode:
+''      %0000: %0000_0111    -                    baseband
+''      %0001: %0000_0111    -                    broadcast
+''      %0010: %0000_1111    -                    baseband + chroma
+''      %0011: %0000_1111    -                    broadcast + aural
+''      %0100: %0111_0000    broadcast            -
+''      %0101: %0111_0000    baseband             -
+''      %0110: %1111_0000    broadcast + aural    -
+''      %0111: %1111_0000    baseband + chroma    -
+''      %1000: %0111_0111    broadcast            baseband
+''      %1001: %0111_0111    baseband             broadcast
+''      %1010: %0111_1111    broadcast            baseband + chroma
+''      %1011: %0111_1111    baseband             broadcast + aural
+''      %1100: %1111_0111    broadcast + aural    baseband
+''      %1101: %1111_0111    baseband + chroma    broadcast
+''      %1110: %1111_1111    broadcast + aural    baseband + chroma
+''      %1111: %1111_1111    baseband + chroma    broadcast + aural
+''      -----------------------------------------------------------
+''            active pins    top nibble           bottom nibble
+''
+''      the baseband signal nibble is arranged as:
+''        bit 3: chroma signal for s-video (attach via 560-ohm resistor)
+''        bits 2..0: baseband video (sum 270/560/1100-ohm resistors to form 75-ohm 1V signal)
+''
+''      the broadcast signal nibble is arranged as:
+''        bit 3: aural subcarrier (sum 560-ohm resistor into network below)
+''        bits 2..0: visual carrier (sum 270/560/1100-ohm resistors to form 75-ohm 1V signal)
+''  _______
+''  tv_mode
+''
+''    bit 4 selects between 16x16 and 16x32 pixel tiles:
+''      0: 16x16 pixel tiles (tileheight = 16)
+''      1: 16x32 pixel tiles (tileheight = 32)
+''
+''    bit 3 controls chroma mixing into broadcast:
+''      0: mix chroma into broadcast (color)
+''      1: strip chroma from broadcast (black/white)
+''
+''    bit 2 controls chroma mixing into baseband:
+''      0: mix chroma into baseband (composite color)
+''      1: strip chroma from baseband (black/white or s-video)
+''
+''    bit 1 controls interlace:
+''      0: progressive scan (243 display lines for NTSC, 286 for PAL)
+''           less flicker, good for motion
+''      1: interlaced scan (486 display lines for NTSC, 572 for PAL)
+''           doubles the vertical display lines, good for text
+''
+''    bit 0 selects NTSC or PAL format
+''      0: NTSC
+''           3016 horizontal display ticks
+''           243 or 486 (interlaced) vertical display lines
+''           CLKFREQ must be at least 14_318_180 (4 * 3_579_545 Hz)*
+''      1: PAL
+''           3692 horizontal display ticks
+''           286 or 572 (interlaced) vertical display lines
+''           CLKFREQ must be at least 17_734_472 (4 * 4_433_618 Hz)*
+''
+''      * driver will disable itself while CLKFREQ is below requirement
+''  _________
+''  tv_screen
+''
+''    pointer to words which define screen contents (left-to-right, top-to-bottom)
+''      number of words must be tv_ht * tv_vt
+''      each word has two bitfields: a 6-bit colorset ptr and a 10-bit pixelgroup ptr
+''        bits 15..10: select the colorset* for the associated pixel tile
+''        bits 9..0: select the pixelgroup** address %ppppppppppcccc00 (p=address, c=0..15)
+''
+''       * colorsets are longs which each define four 8-bit colors
+''
+''      ** pixelgroups are <tileheight> longs which define (left-to-right, top-to-bottom) the 2-bit
+''         (four color) pixels that make up a 16x16 or a 32x32 pixel tile
+''  _________
+''  tv_colors
+''
+''    pointer to longs which define colorsets
+''      number of longs must be 1..64
+''      each long has four 8-bit fields which define colors for 2-bit (four color) pixels
+''      first long's bottom color is also used as the screen background color
+''      8-bit color fields are as follows:
+''        bits 7..4: chroma data (0..15 = blue..green..red..)*
+''        bit 3: controls chroma modulation (0=off, 1=on)
+''        bits 2..0: 3-bit luminance level:
+''          values 0..1: reserved for sync - don't use
+''          values 2..7: valid luminance range, modulation adds/subtracts 1 (beware of 7)
+''          value 0 may be modulated to produce a saturated color toggling between levels 1 and 7
+''
+''      * because of TV's limitations, it doesn't look good when chroma changes abruptly -
+''        rather, use luminance - change chroma only against a black or white background for
+''        best appearance
+''  _____
+''  tv_ht
+''
+''    horizontal number pixel tiles - must be at least 1
+''    practical limit is 40 for NTSC, 50 for PAL
+''  _____
+''  tv_vt
+''
+''    vertical number of pixel tiles - must be at least 1
+''    practical limit is 13 for NTSC, 15 for PAL (26/30 max for interlaced NTSC/PAL)
+''  _____
+''  tv_hx
+''
+''    horizontal tile expansion factor - must be at least 3 for NTSC, 4 for PAL
+''
+''    make sure 16 * tv_ht * tv_hx + ||tv_ho + 32 is less than the horizontal display ticks
+''  _____
+''  tv_vx
+''
+''    vertical tile expansion factor - must be at least 1
+''
+''    make sure <tileheight> * tv_vt * tv_vx + ||tv_vo + 1 is less than the display lines
+''  _____
+''  tv_ho
+''
+''    horizontal offset in ticks - pos/neg value (0 for centered image)
+''    shifts the display right/left
+''  _____
+''  tv_vo
+''
+''    vertical offset in lines - pos/neg value (0 for centered image)
+''    shifts the display up/down
+''  ____________
+''  tv_broadcast
+''
+''    broadcast frequency expressed in Hz (ie channel 2 is 55_250_000)
+''    if 0, modulator is turned off - saves power
+''
+''    broadcasting requires CLKFREQ to be at least 16_000_000
+''    while CLKFREQ is below 16_000_000, modulator will be turned off
+''  ___________
+''  tv_auralcog
+''
+''    selects cog to supply aural fm signal - 0..7
+''    uses ctra pll output from selected cog
+''
+''    in NTSC, the offset frequency must be 4.5MHz and the max bandwidth +-25KHz
+''    in PAL, the offset frequency and max bandwidth vary by PAL type
+
+{{
+
+┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│                                                   TERMS OF USE: MIT License                                                  │                                                            
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation    │ 
+│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,    │
+│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
+│is furnished to do so, subject to the following conditions:                                                                   │
+│                                                                                                                              │
+│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
+│                                                                                                                              │
+│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE          │
+│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR         │
+│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,   │
+│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                         │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
+}}

samples/Propeller Spin/TV_Terminal.spin

@@ -0,0 +1,244 @@
+''***************************************
+''*  TV Terminal v1.1                   *
+''*  Author: Chip Gracey                *
+''*  Copyright (c) 2005 Parallax, Inc.  *
+''*  See end of file for terms of use.  *
+''***************************************
+
+{-----------------REVISION HISTORY-----------------
+ v1.1 - Updated 5/15/2006 to use actual pin number, instead of pin group, for Start method's basepin parameter.}
+ 
+CON
+
+  x_tiles = 16
+  y_tiles = 13
+
+  x_screen = x_tiles << 4
+  y_screen = y_tiles << 4
+
+  width = 0             '0 = minimum
+  x_scale = 1           '1 = minimum
+  y_scale = 1           '1 = minimum
+  x_spacing = 6         '6 = normal
+  y_spacing = 13        '13 = normal
+
+  x_chr = x_scale * x_spacing
+  y_chr = y_scale * y_spacing
+
+  y_offset = y_spacing / 6 + y_chr - 1
+
+  x_limit = x_screen / (x_scale * x_spacing)
+  y_limit = y_screen / (y_scale * y_spacing)
+  y_max = y_limit - 1
+
+  y_screen_bytes = y_screen << 2
+  y_scroll = y_chr << 2
+  y_scroll_longs = y_chr * y_max
+  y_clear = y_scroll_longs << 2
+  y_clear_longs = y_screen - y_scroll_longs
+
+  paramcount = 14       
+
+  
+VAR
+
+  long  x, y, bitmap_base
+
+  long  tv_status     '0/1/2 = off/visible/invisible           read-only
+  long  tv_enable     '0/? = off/on                            write-only
+  long  tv_pins       '%ppmmm = pins                           write-only
+  long  tv_mode       '%ccinp = chroma,interlace,ntsc/pal,swap write-only
+  long  tv_screen     'pointer to screen (words)               write-only
+  long  tv_colors     'pointer to colors (longs)               write-only               
+  long  tv_hc         'horizontal cells                        write-only
+  long  tv_vc         'vertical cells                          write-only
+  long  tv_hx         'horizontal cell expansion               write-only
+  long  tv_vx         'vertical cell expansion                 write-only
+  long  tv_ho         'horizontal offset                       write-only
+  long  tv_vo         'vertical offset                         write-only
+  long  tv_broadcast  'broadcast frequency (Hz)                write-only
+  long  tv_auralcog   'aural fm cog                            write-only
+
+  long  bitmap[x_tiles * y_tiles << 4 + 16]     'add 16 longs to allow for 64-byte alignment
+  word  screen[x_tiles * y_tiles]
+  
+
+OBJ
+
+  tv    : "tv"
+  gr    : "graphics"
+
+
+PUB start(basepin)
+
+'' Start terminal
+''
+''  basepin = first of three pins on a 4-pin boundary (0, 4, 8...) to have
+''  1.1k, 560, and 270 ohm resistors connected and summed to form the 1V,
+''  75 ohm DAC for baseband video   
+
+  'init bitmap and tile screen
+  bitmap_base := (@bitmap + $3F) & $7FC0
+  repeat x from 0 to x_tiles - 1
+    repeat y from 0 to y_tiles - 1
+      screen[y * x_tiles + x] := bitmap_base >> 6 + y + x * y_tiles
+
+  'start tv
+  tvparams_pins := (basepin & $38) << 1 | (basepin & 4 == 4) & %0101
+  longmove(@tv_status, @tvparams, paramcount)
+  tv_screen := @screen
+  tv_colors := @color_schemes
+  tv.start(@tv_status)
+
+  'start graphics
+  gr.start
+  gr.setup(x_tiles, y_tiles, 0, y_screen, bitmap_base)
+  gr.textmode(x_scale, y_scale, x_spacing, 0)
+  gr.width(width)
+  out(0)
+
+
+PUB stop
+
+'' Stop terminal
+
+  tv.stop
+  gr.stop
+
+
+PUB out(c)
+
+'' Print a character
+''
+''       $00 = home
+''  $01..$03 = color
+''  $04..$07 = color schemes
+''       $09 = tab
+''       $0D = return
+''  $20..$7E = character
+
+  case c
+
+    $00:                'home?
+      gr.clear
+      x := y := 0
+
+    $01..$03:           'color?
+      gr.color(c)
+
+    $04..$07:           'color scheme?
+      tv_colors := @color_schemes[c & 3]
+
+    $09:                'tab?
+      repeat
+        out($20)
+      while x & 7
+
+    $0D:                'return?
+      newline
+
+    $20..$7E:           'character?
+      gr.text(x * x_chr, -y * y_chr - y_offset, @c)
+      gr.finish
+      if ++x == x_limit
+        newline
+
+
+PUB str(string_ptr)
+
+'' Print a zero-terminated string
+
+  repeat strsize(string_ptr)
+    out(byte[string_ptr++])
+
+
+PUB dec(value) | i
+
+'' Print a decimal number
+
+  if value < 0
+    -value
+    out("-")
+
+  i := 1_000_000_000
+
+  repeat 10
+    if value => i
+      out(value / i + "0")
+      value //= i
+      result~~
+    elseif result or i == 1
+      out("0")
+    i /= 10
+
+
+PUB hex(value, digits)
+
+'' Print a hexadecimal number
+
+  value <<= (8 - digits) << 2
+  repeat digits
+    out(lookupz((value <-= 4) & $F : "0".."9", "A".."F"))
+
+
+PUB bin(value, digits)
+
+'' Print a binary number
+
+  value <<= 32 - digits
+  repeat digits
+    out((value <-= 1) & 1 + "0")
+
+
+PRI newline
+
+  if ++y == y_limit
+    gr.finish
+    repeat x from 0 to x_tiles - 1
+      y := bitmap_base + x * y_screen_bytes
+      longmove(y, y + y_scroll, y_scroll_longs)
+      longfill(y + y_clear, 0, y_clear_longs)
+    y := y_max
+  x := 0
+
+
+DAT
+
+tvparams                long    0               'status
+                        long    1               'enable
+tvparams_pins           long    %001_0101       'pins
+                        long    %0000           'mode
+                        long    0               'screen
+                        long    0               'colors
+                        long    x_tiles         'hc
+                        long    y_tiles         'vc
+                        long    10              'hx
+                        long    1               'vx
+                        long    0               'ho
+                        long    0               'vo
+                        long    55_250_000      'broadcast
+                        long    0               'auralcog
+
+color_schemes           long    $BC_6C_05_02
+                        long    $0E_0D_0C_0A
+                        long    $6E_6D_6C_6A
+                        long    $BE_BD_BC_BA
+
+{{
+
+┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│                                                   TERMS OF USE: MIT License                                                  │                                                            
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation    │ 
+│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,    │
+│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
+│is furnished to do so, subject to the following conditions:                                                                   │
+│                                                                                                                              │
+│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
+│                                                                                                                              │
+│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE          │
+│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR         │
+│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,   │
+│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                         │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
+}}                   

samples/Propeller Spin/TV_Text.spin

@@ -0,0 +1,232 @@
+''***************************************
+''*  TV Text 40x13 v1.0                 *
+''*  Author: Chip Gracey                *
+''*  Copyright (c) 2006 Parallax, Inc.  *               
+''*  See end of file for terms of use.  *               
+''***************************************
+
+CON
+
+  cols = 40
+  rows = 13
+
+  screensize = cols * rows
+  lastrow = screensize - cols
+
+  tv_count = 14
+
+  
+VAR
+
+  long  col, row, color, flag
+  
+  word  screen[screensize]
+  long  colors[8 * 2]
+
+  long  tv_status     '0/1/2 = off/invisible/visible              read-only   (14 longs)
+  long  tv_enable     '0/non-0 = off/on                           write-only
+  long  tv_pins       '%pppmmmm = pin group, pin group mode       write-only
+  long  tv_mode       '%tccip = tile,chroma,interlace,ntsc/pal    write-only
+  long  tv_screen     'pointer to screen (words)                  write-only      
+  long  tv_colors     'pointer to colors (longs)                  write-only                            
+  long  tv_ht         'horizontal tiles                           write-only                            
+  long  tv_vt         'vertical tiles                             write-only                            
+  long  tv_hx         'horizontal tile expansion                  write-only                            
+  long  tv_vx         'vertical tile expansion                    write-only                            
+  long  tv_ho         'horizontal offset                          write-only                            
+  long  tv_vo         'vertical offset                            write-only                            
+  long  tv_broadcast  'broadcast frequency (Hz)                   write-only                            
+  long  tv_auralcog   'aural fm cog                               write-only                            
+
+
+OBJ
+
+  tv : "tv"
+
+
+PUB start(basepin) : okay
+
+'' Start terminal - starts a cog
+'' returns false if no cog available
+
+  setcolors(@palette)
+  out(0)
+  
+  longmove(@tv_status, @tv_params, tv_count)
+  tv_pins := (basepin & $38) << 1 | (basepin & 4 == 4) & %0101
+  tv_screen := @screen
+  tv_colors := @colors
+  
+  okay := tv.start(@tv_status)
+
+
+PUB stop
+
+'' Stop terminal - frees a cog
+
+  tv.stop
+
+
+PUB str(stringptr)
+
+'' Print a zero-terminated string
+
+  repeat strsize(stringptr)
+    out(byte[stringptr++])
+
+
+PUB dec(value) | i
+
+'' Print a decimal number
+
+  if value < 0
+    -value
+    out("-")
+
+  i := 1_000_000_000
+
+  repeat 10
+    if value => i
+      out(value / i + "0")
+      value //= i
+      result~~
+    elseif result or i == 1
+      out("0")
+    i /= 10
+
+
+PUB hex(value, digits)
+
+'' Print a hexadecimal number
+
+  value <<= (8 - digits) << 2
+  repeat digits
+    out(lookupz((value <-= 4) & $F : "0".."9", "A".."F"))
+
+
+PUB bin(value, digits)
+
+'' Print a binary number
+
+  value <<= 32 - digits
+  repeat digits
+    out((value <-= 1) & 1 + "0")
+
+
+PUB out(c) | i, k
+
+'' Output a character
+''
+''     $00 = clear screen
+''     $01 = home
+''     $08 = backspace
+''     $09 = tab (8 spaces per)
+''     $0A = set X position (X follows)
+''     $0B = set Y position (Y follows)
+''     $0C = set color (color follows)
+''     $0D = return
+''  others = printable characters
+
+  case flag
+    $00: case c
+           $00: wordfill(@screen, $220, screensize)
+                col := row := 0
+           $01: col := row := 0
+           $08: if col
+                  col--
+           $09: repeat
+                  print(" ")
+                while col & 7
+           $0A..$0C: flag := c
+                     return
+           $0D: newline
+           other: print(c)
+    $0A: col := c // cols
+    $0B: row := c // rows
+    $0C: color := c & 7
+  flag := 0
+
+
+PUB setcolors(colorptr) | i, fore, back
+
+'' Override default color palette
+'' colorptr must point to a list of up to 8 colors
+'' arranged as follows:
+''
+''               fore   back
+''               ------------
+'' palette  byte color, color     'color 0
+''          byte color, color     'color 1
+''          byte color, color     'color 2
+''          ...
+
+  repeat i from 0 to 7
+    fore := byte[colorptr][i << 1]
+    back := byte[colorptr][i << 1 + 1]
+    colors[i << 1]     := fore << 24 + back << 16 + fore << 8 + back
+    colors[i << 1 + 1] := fore << 24 + fore << 16 + back << 8 + back
+
+
+PRI print(c)
+
+  screen[row * cols + col] := (color << 1 + c & 1) << 10 + $200 + c & $FE
+  if ++col == cols
+    newline
+
+
+PRI newline | i
+
+  col := 0
+  if ++row == rows
+    row--
+    wordmove(@screen, @screen[cols], lastrow)   'scroll lines
+    wordfill(@screen[lastrow], $220, cols)      'clear new line
+
+
+DAT
+
+tv_params               long    0               'status
+                        long    1               'enable
+                        long    0               'pins
+                        long    %10010          'mode
+                        long    0               'screen
+                        long    0               'colors
+                        long    cols            'hc
+                        long    rows            'vc
+                        long    4               'hx
+                        long    1               'vx
+                        long    0               'ho
+                        long    0               'vo
+                        long    0               'broadcast
+                        long    0               'auralcog
+
+
+                        '       fore   back
+                        '       color  color
+palette                 byte    $07,   $0A    '0    white / dark blue
+                        byte    $07,   $BB    '1    white / red
+                        byte    $9E,   $9B    '2   yellow / brown
+                        byte    $04,   $07    '3     grey / white
+                        byte    $3D,   $3B    '4     cyan / dark cyan
+                        byte    $6B,   $6E    '5    green / gray-green
+                        byte    $BB,   $CE    '6      red / pink
+                        byte    $3C,   $0A    '7     cyan / blue
+
+{{
+
+┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│                                                   TERMS OF USE: MIT License                                                  │                                                            
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation    │ 
+│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,    │
+│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
+│is furnished to do so, subject to the following conditions:                                                                   │
+│                                                                                                                              │
+│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
+│                                                                                                                              │
+│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE          │
+│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR         │
+│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,   │
+│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                         │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
+}}                        

samples/Propeller Spin/VGA.spin

@@ -0,0 +1,596 @@
+''***************************************
+''*  VGA Driver v1.1                    *
+''*  Author: Chip Gracey                *
+''*  Copyright (c) 2006 Parallax, Inc.  *
+''*  See end of file for terms of use.  *
+''***************************************
+
+' v1.0 - 01 May 2006 - original version
+' v1.1 - 15 May 2006 - pixel tile size can now be 16 x 32 to enable more efficient
+'                       character displays utilizing the internal font - see 'vga_mode'
+
+CON
+
+  paramcount    = 21
+  colortable    = $180  'start of colortable inside cog
+  
+
+VAR
+
+  long  cog
+
+
+PUB start(vgaptr) : okay
+
+'' Start VGA driver - starts a cog
+'' returns false if no cog available
+''
+''   vgaptr = pointer to VGA parameters
+
+  stop
+  okay := cog := cognew(@entry, vgaptr) + 1
+
+
+PUB stop
+
+'' Stop VGA driver - frees a cog
+
+  if cog
+    cogstop(cog~ - 1)
+
+
+DAT
+
+'********************************
+'* Assembly language VGA driver *
+'********************************
+
+                        org
+'
+'
+' Entry
+'
+entry                   mov     taskptr,#tasks          'reset tasks
+
+                        mov     x,#8                    'perform task sections initially
+:init                   jmpret  taskret,taskptr
+                        djnz    x,#:init
+'
+'
+' Superfield
+'
+superfield              mov     hv,hvbase               'set hv
+
+                        mov     interlace,#0            'reset interlace
+
+                        test    _mode,#%0100    wz      'get interlace into nz
+'
+'
+' Field
+'
+field                   wrlong  visible,par             'set status to visible
+
+                        tjz     vb,#:nobl               'do any visible back porch lines
+                        mov     x,vb
+                        movd    bcolor,#colortable
+                        call    #blank_line
+:nobl
+                        mov     screen,_screen          'point to first tile (upper-leftmost)
+                        mov     y,_vt                   'set vertical tiles
+:line                   mov     vx,_vx                  'set vertical expand
+:vert   if_nz           xor     interlace,#1            'interlace skip?
+        if_nz           tjz     interlace,#:skip
+
+                        tjz     hb,#:nobp               'do any visible back porch pixels
+                        mov     vscl,hb
+                        waitvid colortable,#0
+:nobp
+                        mov     x,_ht                   'set horizontal tiles
+                        mov     vscl,hx                 'set horizontal expand
+
+:tile                   rdword  tile,screen             'read tile
+                        add     tile,line               'set pointer bits into tile
+                        rol     tile,#6                 'read tile pixels
+                        rdlong  pixels,tile             '(8 clocks between reads)
+                        shr     tile,#10+6              'set tile colors
+                        movd    :color,tile
+                        add     screen,#2               'point to next tile
+:color                  waitvid colortable,pixels       'pass colors and pixels to video
+                        djnz    x,#:tile                'another tile?
+
+                        sub     screen,hc2x             'repoint to first tile in same line
+
+                        tjz     hf,#:nofp               'do any visible front porch pixels
+                        mov     vscl,hf
+                        waitvid colortable,#0
+:nofp
+                        mov     x,#1                    'do hsync
+                        call    #blank_hsync            '(x=0)
+
+:skip                   djnz    vx,#:vert               'vertical expand?
+                        ror     line,linerot            'set next line
+                        add     line,lineadd    wc
+                        rol     line,linerot                        
+        if_nc           jmp     #:line
+                        add     screen,hc2x             'point to first tile in next line
+                        djnz    y,#:line        wc      'another tile line? (c=0)
+
+                        tjz     vf,#:nofl               'do any visible front porch lines
+                        mov     x,vf
+                        movd    bcolor,#colortable
+                        call    #blank_line
+:nofl
+        if_nz           xor     interlace,#1    wc,wz   'get interlace and field1 into nz (c=0/?)
+
+        if_z            wrlong  invisible,par           'unless interlace and field1, set status to invisible
+
+                        mov     taskptr,#tasks          'reset tasks
+
+                        addx    x,_vf           wc      'do invisible front porch lines (x=0 before, c=0 after)
+                        call    #blank_line
+
+                        mov     x,_vs                   'do vsync lines
+                        call    #blank_vsync
+
+                        mov     x,_vb                   'do invisible back porch lines, except last
+                        call    #blank_vsync
+
+        if_nz           jmp     #field                  'if interlace and field1, display field2
+                        jmp     #superfield             'else, new superfield
+'
+'
+' Blank line(s)
+'
+blank_vsync             cmp     interlace,#2    wc      'vsync (c=1)
+
+blank_line              mov     vscl,h1                 'blank line or vsync-interlace?
+        if_nc           add     vscl,h2
+        if_c_and_nz     xor     hv,#%01
+        if_c            waitvid hv,#0
+        if_c            mov     vscl,h2                 'blank line or vsync-normal?
+        if_c_and_z      xor     hv,#%01
+bcolor                  waitvid hv,#0
+
+        if_nc           jmpret  taskret,taskptr         'call task section (z undisturbed)
+
+blank_hsync             mov     vscl,_hf                'hsync, do invisible front porch pixels
+                        waitvid hv,#0
+
+                        mov     vscl,_hs                'do invisble sync pixels
+                        xor     hv,#%10
+                        waitvid hv,#0
+
+                        mov     vscl,_hb                'do invisible back porch pixels
+                        xor     hv,#%10
+                        waitvid hv,#0
+
+                        djnz    x,#blank_line   wc      '(c=0)
+
+                        movd    bcolor,#hv
+blank_hsync_ret
+blank_line_ret
+blank_vsync_ret         ret
+'
+'
+' Tasks - performed in sections during invisible back porch lines
+'
+tasks                   mov     t1,par                  'load parameters
+                        movd    :par,#_enable           '(skip _status)
+                        mov     t2,#paramcount - 1
+:load                   add     t1,#4
+:par                    rdlong  0,t1
+                        add     :par,d0
+                        djnz    t2,#:load               '+164
+
+                        mov     t1,#2                   'set video pins and directions
+                        shl     t1,_pins                '(if video disabled, pins will drive low)
+                        sub     t1,#1
+                        test    _pins,#$20      wc
+                        and     _pins,#$38
+                        shr     t1,_pins
+                        movs    vcfg,t1
+                        shl     t1,_pins
+                        shr     _pins,#3
+                        movd    vcfg,_pins
+        if_nc           mov     dira,t1
+        if_nc           mov     dirb,#0
+        if_c            mov     dira,#0
+        if_c            mov     dirb,t1                 '+14
+
+                        tjz     _enable,#disabled       '+2, disabled?
+
+                        jmpret  taskptr,taskret         '+1=181, break and return later
+
+                        rdlong  t1,#0                   'make sure CLKFREQ => 16MHz
+                        shr     t1,#1
+                        cmp     t1,m8           wc
+        if_c            jmp     #disabled               '+8
+
+                        min     _rate,pllmin            'limit _rate to pll range
+                        max     _rate,pllmax            '+2
+
+                        mov     t1,#%00001_011          'set ctra configuration
+:max                    cmp     m8,_rate        wc      'adjust rate to be within 4MHz-8MHz
+        if_c            shr     _rate,#1                '(vco will be within 64MHz-128MHz)
+        if_c            add     t1,#%00000_001
+        if_c            jmp     #:max
+:min                    cmp     _rate,m4        wc
+        if_c            shl     _rate,#1
+        if_c            sub     x,#%00000_001
+        if_c            jmp     #:min
+                        movi    ctra,t1                 '+22
+
+                        rdlong  t1,#0                   'divide _rate/CLKFREQ and set frqa
+                        mov     hvbase,#32+1
+:div                    cmpsub  _rate,t1        wc
+                        rcl     t2,#1
+                        shl     _rate,#1
+                        djnz    hvbase,#:div            '(hvbase=0)
+                        mov     frqa,t2                 '+136
+
+                        test    _mode,#%0001    wc      'make hvbase
+                        muxnc   hvbase,vmask
+                        test    _mode,#%0010    wc
+                        muxnc   hvbase,hmask            '+4
+
+                        jmpret  taskptr,taskret         '+1=173, break and return later
+
+                        mov     hx,_hx                  'compute horizontal metrics
+                        shl     hx,#8
+                        or      hx,_hx
+                        shl     hx,#4
+
+                        mov     hc2x,_ht
+                        shl     hc2x,#1
+
+                        mov     h1,_hd
+                        neg     h2,_hf
+                        sub     h2,_hs
+                        sub     h2,_hb
+                        sub     h1,h2
+                        shr     h1,#1           wc
+                        addx    h2,h1
+
+                        mov     t1,_ht
+                        mov     t2,_hx
+                        call    #multiply
+                        mov     hf,_hd
+                        sub     hf,t1
+                        shr     hf,#1           wc
+                        mov     hb,_ho
+                        addx    hb,hf
+                        sub     hf,_ho                  '+59
+
+                        mov     t1,_vt                  'compute vertical metrics
+                        mov     t2,_vx
+                        call    #multiply
+                        test    _mode,#%1000    wc      'consider tile size
+                        muxc    linerot,#1
+                        mov     lineadd,lineinc
+        if_c            shr     lineadd,#1
+        if_c            shl     t1,#1
+                        test    _mode,#%0100    wc      'consider interlace
+        if_c            shr     t1,#1
+                        mov     vf,_vd
+                        sub     vf,t1
+                        shr     vf,#1           wc
+                        neg     vb,_vo
+                        addx    vb,vf
+                        add     vf,_vo                  '+53
+
+                        movi    vcfg,#%01100_000        '+1, set video configuration
+
+:colors                 jmpret  taskptr,taskret         '+1=114/160, break and return later
+
+                        mov     t1,#13                  'load next 13 colors into colortable
+:loop                   mov     t2,:color               '5 times = 65 (all 64 colors loaded)
+                        shr     t2,#9-2
+                        and     t2,#$FC
+                        add     t2,_colors
+                        rdlong  t2,t2
+                        and     t2,colormask
+                        or      t2,hvbase
+:color                  mov     colortable,t2
+                        add     :color,d0
+                        andn    :color,d6
+                        djnz    t1,#:loop               '+158
+
+                        jmp     #:colors                '+1, keep loading colors
+'
+'
+' Multiply t1 * t2 * 16 (t1, t2 = bytes)
+'
+multiply                shl     t2,#8+4-1
+
+                        mov     tile,#8
+:loop                   shr     t1,#1           wc
+        if_c            add     t1,t2
+                        djnz    tile,#:loop
+
+multiply_ret            ret                             '+37
+'
+'
+' Disabled - reset status, nap ~4ms, try again
+'
+disabled                mov     ctra,#0                 'reset ctra
+                        mov     vcfg,#0                 'reset video
+
+                        wrlong  outa,par                'set status to disabled
+
+                        rdlong  t1,#0                   'get CLKFREQ
+                        shr     t1,#8                   'nap for ~4ms
+                        min     t1,#3
+                        add     t1,cnt
+                        waitcnt t1,#0
+
+                        jmp     #entry                  'reload parameters
+'
+'
+' Initialized data
+'
+pllmin                  long    500_000                 'pll lowest output frequency
+pllmax                  long    128_000_000             'pll highest output frequency
+m8                      long    8_000_000               '*16 = 128MHz (pll vco max)
+m4                      long    4_000_000               '*16 = 64MHz (pll vco min)
+d0                      long    1 << 9 << 0
+d6                      long    1 << 9 << 6
+invisible               long    1
+visible                 long    2
+line                    long    $00060000
+lineinc                 long    $10000000
+linerot                 long    0
+vmask                   long    $01010101
+hmask                   long    $02020202
+colormask               long    $FCFCFCFC
+'
+'
+' Uninitialized data
+'
+taskptr                 res     1                       'tasks
+taskret                 res     1
+t1                      res     1
+t2                      res     1
+
+x                       res     1                       'display
+y                       res     1
+hf                      res     1
+hb                      res     1
+vf                      res     1
+vb                      res     1
+hx                      res     1
+vx                      res     1
+hc2x                    res     1
+screen                  res     1
+tile                    res     1
+pixels                  res     1
+lineadd                 res     1
+interlace               res     1
+hv                      res     1
+hvbase                  res     1
+h1                      res     1
+h2                      res     1
+'
+'
+' Parameter buffer
+'
+_enable                 res     1       '0/non-0        read-only
+_pins                   res     1       '%pppttt        read-only
+_mode                   res     1       '%tihv          read-only
+_screen                 res     1       '@word          read-only
+_colors                 res     1       '@long          read-only
+_ht                     res     1       '1+             read-only
+_vt                     res     1       '1+             read-only
+_hx                     res     1       '1+             read-only
+_vx                     res     1       '1+             read-only
+_ho                     res     1       '0+-            read-only
+_vo                     res     1       '0+-            read-only
+_hd                     res     1       '1+             read-only
+_hf                     res     1       '1+             read-only
+_hs                     res     1       '1+             read-only
+_hb                     res     1       '1+             read-only
+_vd                     res     1       '1+             read-only
+_vf                     res     1       '1+             read-only
+_vs                     res     1       '1+             read-only
+_vb                     res     1       '2+             read-only
+_rate                   res     1       '500_000+       read-only
+
+                        fit     colortable              'fit underneath colortable ($180-$1BF)
+
+
+''
+''___
+''VAR                   'VGA parameters - 21 contiguous longs
+''
+''  long  vga_status    '0/1/2 = off/visible/invisible      read-only
+''  long  vga_enable    '0/non-0 = off/on                   write-only
+''  long  vga_pins      '%pppttt = pins                     write-only
+''  long  vga_mode      '%tihv = tile,interlace,hpol,vpol   write-only
+''  long  vga_screen    'pointer to screen (words)          write-only
+''  long  vga_colors    'pointer to colors (longs)          write-only            
+''  long  vga_ht        'horizontal tiles                   write-only
+''  long  vga_vt        'vertical tiles                     write-only
+''  long  vga_hx        'horizontal tile expansion          write-only
+''  long  vga_vx        'vertical tile expansion            write-only
+''  long  vga_ho        'horizontal offset                  write-only
+''  long  vga_vo        'vertical offset                    write-only
+''  long  vga_hd        'horizontal display ticks           write-only
+''  long  vga_hf        'horizontal front porch ticks       write-only
+''  long  vga_hs        'horizontal sync ticks              write-only
+''  long  vga_hb        'horizontal back porch ticks        write-only
+''  long  vga_vd        'vertical display lines             write-only
+''  long  vga_vf        'vertical front porch lines         write-only
+''  long  vga_vs        'vertical sync lines                write-only
+''  long  vga_vb        'vertical back porch lines          write-only
+''  long  vga_rate      'tick rate (Hz)                     write-only
+''
+''The preceding VAR section may be copied into your code.
+''After setting variables, do start(@vga_status) to start driver.
+''
+''All parameters are reloaded each superframe, allowing you to make live
+''changes. To minimize flicker, correlate changes with vga_status.
+''
+''Experimentation may be required to optimize some parameters.
+''
+''Parameter descriptions:
+''  __________
+''  vga_status
+''
+''    driver sets this to indicate status:
+''      0: driver disabled (vga_enable = 0 or CLKFREQ < 16MHz)
+''      1: currently outputting invisible sync data
+''      2: currently outputting visible screen data
+''  __________
+''  vga_enable
+''
+''        0: disable (pins will be driven low, reduces power)
+''    non-0: enable
+''  ________
+''  vga_pins
+''
+''    bits 5..3 select pin group:
+''      %000: pins 7..0
+''      %001: pins 15..8
+''      %010: pins 23..16
+''      %011: pins 31..24
+''      %100: pins 39..32
+''      %101: pins 47..40
+''      %110: pins 55..48
+''      %111: pins 63..56
+''
+''    bits 2..0 select top pin within group
+''    for example: %01111 (15) will use pins %01000-%01111 (8-15)
+''  ________
+''  vga_mode
+''
+''    bit 3 selects between 16x16 and 16x32 pixel tiles:
+''      0: 16x16 pixel tiles (tileheight = 16)
+''      1: 16x32 pixel tiles (tileheight = 32)
+''
+''    bit 2 controls interlace:
+''      0: progressive scan (less flicker, good for motion, required for LCD monitors)
+''      1: interlaced scan (allows you to double vga_vt, good for text)
+''
+''    bits 1 and 0 select horizontal and vertical sync polarity, respectively
+''      0: active low
+''      1: active high
+''  __________
+''  vga_screen
+''
+''    pointer to words which define screen contents (left-to-right, top-to-bottom)
+''      number of words must be vga_ht * vga_vt
+''      each word has two bitfields: a 6-bit colorset ptr and a 10-bit pixelgroup ptr
+''        bits 15..10: select the colorset* for the associated pixel tile
+''        bits 9..0: select the pixelgroup** address %ppppppppppcccc00 (p=address, c=0..15)
+''
+''       * colorsets are longs which each define four 8-bit colors
+''
+''      ** pixelgroups are <tileheight> longs which define (left-to-right, top-to-bottom) the 2-bit
+''         (four color) pixels that make up a 16x16 or a 16x32 pixel tile
+''  __________
+''  vga_colors
+''
+''    pointer to longs which define colorsets
+''      number of longs must be 1..64
+''      each long has four 8-bit fields which define colors for 2-bit (four color) pixels
+''      first long's bottom color is also used as the screen background color
+''      8-bit color fields are as follows:
+''        bits 7..2: actual state of pins 7..2 within pin group*
+''        bits 1..0: don't care (used within driver for hsync and vsync)
+''
+''    * it is suggested that:
+''        bits/pins 7..6 are used for red
+''        bits/pins 5..4 are used for green
+''        bits/pins 3..2 are used for blue
+''      for each bit/pin set, sum 240 and 470-ohm resistors to form 75-ohm 1V signals
+''      connect signal sets to RED, GREEN, and BLUE on VGA connector
+''      always connect group pin 1 to HSYNC on VGA connector via 240-ohm resistor
+''      always connect group pin 0 to VSYNC on VGA connector via 240-ohm resistor
+''  ______
+''  vga_ht
+''
+''    horizontal number of pixel tiles - must be at least 1
+''  ______
+''  vga_vt
+''
+''    vertical number of pixel tiles - must be at least 1
+''  ______
+''  vga_hx
+''
+''    horizontal tile expansion factor - must be at least 1
+''
+''    make sure 16 * vga_ht * vga_hx + ||vga_ho is equal to or at least 16 less than vga_hd
+''  ______
+''  vga_vx
+''
+''    vertical tile expansion factor - must be at least 1
+''
+''    make sure <tileheight> * vga_vt * vga_vx + ||vga_vo does not exceed vga_vd
+''      (for interlace, use <tileheight> / 2 * vga_vt * vga_vx + ||vga_vo)
+''  ______
+''  vga_ho
+''
+''    horizontal offset in ticks - pos/neg value (0 recommended)
+''    shifts the display right/left
+''  ______
+''  vga_vo
+''
+''    vertical offset in lines - pos/neg value (0 recommended)
+''    shifts the display up/down
+''  ______
+''  vga_hd
+''
+''    horizontal display ticks
+''  ______
+''  vga_hf
+''
+''    horizontal front porch ticks
+''  ______
+''  vga_hs
+''
+''    horizontal sync ticks
+''  ______
+''  vga_hb
+''
+''    horizontal back porch ticks
+''  ______
+''  vga_vd
+''
+''    vertical display lines
+''  ______
+''  vga_vf
+''
+''    vertical front porch lines
+''  ______
+''  vga_vs
+''
+''    vertical sync lines
+''  ______
+''  vga_vb
+''
+''    vertical back porch lines
+''  ________
+''  vga_rate
+''
+''    tick rate in Hz
+''
+''    driver will limit value to be within 500KHz and 128MHz
+''    pixel rate (vga_rate / vga_hx) should be no more than CLKFREQ / 4
+
+{{
+
+┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│                                                   TERMS OF USE: MIT License                                                  │                                                            
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation    │ 
+│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,    │
+│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
+│is furnished to do so, subject to the following conditions:                                                                   │
+│                                                                                                                              │
+│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
+│                                                                                                                              │
+│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE          │
+│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR         │
+│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,   │
+│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                         │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
+}}

samples/Propeller Spin/VocalTract.spin

@@ -0,0 +1,737 @@
+{{
+┌───────────────────────────────────────────┬────────────────┬───────────────────────────────────┬─────────────────┐
+│ Vocal Tract v1.1                          │ by Chip Gracey │ Copyright (c) 2006 Parallax, Inc. │ 28 October 2006 │
+├───────────────────────────────────────────┴────────────────┴───────────────────────────────────┴─────────────────┤
+│                                                                                                                  │
+│ This object synthesizes a human vocal tract in real-time. It requires one cog and at least 80 MHz.               │
+│                                                                                                                  │
+│ The vocal tract is controlled via 13 single-byte parameters which must reside in the parent object:              │
+│                                                                                                                  │
+│ VAR byte aa,ga,gp,vp,vr,f1,f2,f3,f4,na,nf,fa,ff    'vocal tract parameters                                       │
+│                                                                                                                  │
+│                                                                                                                  │
+│                        aa                                                                                        │
+│                  ┌────────────┐                                                                                  │
+│                  │ ASPIRATION ├──┐                                                                              │
+│                  └────────────┘   │     f1       f2       f3       f4      na   nf                               │
+│                                      ┌────┐   ┌────┐   ┌────┐   ┌────┐   ┌───────┐                              │
+│                                  +┣──┤ F1 ├──┤ F2 ├──┤ F3 ├──┤ F4 ├──┤ NASAL ├──┐                          │
+│                       ga   gp        └────┘   └────┘   └────┘   └────┘   └───────┘   │                          │
+│                     ┌─────────┐   │                                                                             │
+│                     │ GLOTTAL ├──┘                                                  +┣── OUTPUT                │
+│                     └────┬────┘                                          fa   ff                                │
+│                                                                      ┌───────────┐   │                          │
+│                       vp │ vr                                         │ FRICATION ├──┘                          │
+│                     ┌────┴────┐                                       └───────────┘                              │
+│                     │ VIBRATO │                                                                                  │
+│                     └─────────┘                                                                                  │
+│                                                                                                                  │
+│                                                                                                                  │
+│       ┌───────────┬──────────────────────┬─────────────┬────────────────────────────────────────────────┐        │
+│       │ parameter │ description          │ unit        │ notes                                          │        │
+│       ├───────────┼──────────────────────┼─────────────┼────────────────────────────────────────────────┤        │
+│       │    aa     │ aspiration amplitude │ 0..255      │ breath volume: silent..loud, linear            │        │
+│       │    ga     │ glottal amplitude    │ 0..255      │ voice volume: silent..loud, linear             │        │
+│       │    gp     │ glottal pitch        │ 1/48 octave │ voice pitch: 100 ─ 110.00Hz (musical note A2) │        │
+│       │    vp     │ vibrato pitch        │ 1/48 octave │ voice vibrato pitch: 48 ─ ± 1/2 octave swing  │        │
+│       │    vr     │ vibrato rate         │ 0.0763 Hz   │ voice vibrato rate: 52 ─ 4 Hz                 │        │
+│       │    f1     │ formant1 frequency   │ 19.53 Hz    │ 1st resonator frequency: 40 ─ 781 Hz          │        │
+│       │    f2     │ formant2 frequency   │ 19.53 Hz    │ 2nd resonator frequency: 56 ─ 1094 Hz         │        │
+│       │    f3     │ formant3 frequency   │ 19.53 Hz    │ 3rd resonator frequency: 128 ─ 2500 Hz        │        │
+│       │    f4     │ formant4 frequency   │ 19.53 Hz    │ 4th resonator frequency: 179 ─ 3496 Hz        │        │
+│       │    na     │ nasal amplitude      │ 0..255      │ anti-resonator level: off..on, linear          │        │
+│       │    nf     │ nasal frequency      │ 19.53 Hz    │ anti-resonator frequency: 102 ─ 1992 Hz       │        │
+│       │    fa     │ frication amplitude  │ 0..255      │ white noise volume: silent..loud, linear       │        │
+│       │    ff     │ frication frequency  │ 39.06 Hz    │ white noise frequency: 60 ─ 2344 Hz ("Sh")    │        │
+│       └───────────┴──────────────────────┴─────────────┴────────────────────────────────────────────────┘        │
+│                                                                                                                  │
+│ The parent object alternately modifies one or more of these parameters and then calls the go(time) method to     │
+│ queue the entire 13-parameter frame for feeding to the vocal tract. The vocal tract will load one queued frame   │
+│ after another and smoothly interpolate between them over specified amounts of time without interruption. Up to   │
+│ eight frames will be queued in order to relax the frame-generation timing requirement of the parent object. If   │
+│ eight frames are queued, the parent must then wait to queue another frame. If the vocal tract runs out of        │
+│ frames, it will continue generating samples based on the last frame. When a new frame is queued, it will         │
+│ immediately load it and begin inter-polating towards it.                                                         │                                    
+│                                                                                                                  │
+│ The vocal tract generates audio samples at a continuous rate of 20KHz. These samples can be output to pins via   │
+│ delta-modulation for RC filtering or direct transducer driving. An FM aural subcarrier can also be generated for │
+│ inclusion into a TV broadcast controlled by another cog. Regardless of any output mode, samples are always       │
+│ streamed into a special variable so that other objects can access them in real-time.                             │                                                           
+│                                                                                                                  │
+│ In order to achieve optimal sound quality, it is worthwhile to maximize amplitudes such as 'ga' to the point     │
+│ just shy of numerical overflow. Numerical overflow results in high-amplitude noise bursts which are quite        │
+│ disruptive. The closeness of 'f1'-'f4' and their relationship to 'gp' can greatly influence the amount of 'ga'   │
+│ that can be applied before overflow occurs. You must determine through experimentation what the limits are. By   │
+│ pushing 'ga' close to the overflow point, you will maximize the signal-to-noise ratio of the vocal tract,        │
+│ resulting in the highest quality sound. Once your vocal tract programming is complete, the attenuation level     │
+│ can then be used to reduce the overall output in 3dB steps while preserving the signal-to-noise ratio.           │                                       
+│                                                                                                                  │
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│ Revision History                                                                   v1.0 released 26 October 2006 │
+│                                                                                                                  │
+│ v1.1  If the vocal tract runs out of frames, its internal parameters will now be brought all the way to the      │
+│       last frame's values. Before, they were left one interpolation point shy, and then set to the last frame's  │
+│       values at the start of the next frame. For continuous frames this was trivial, but it posed a problem      │
+│       during frame gaps because the internal parameters would get stalled at transition points just shy of the   │
+│       last frame's values. This change makes the vocal tract behave more sensibly during frame gaps.             │                                                                        
+│                                                                                                                  │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘                                     
+                                                                                                                                            
+}}                                                                                                                                          
+CON                                                                                                                                         
+                                                                                                                                            
+  frame_buffers = 8                                     'frame buffers (2n)                                                                
+                                                                                                                                            
+  frame_bytes = 3 {for stepsize} + 13 {for aa..ff}      '16 bytes per frame                                                                 
+  frame_longs = frame_bytes / 4                         '4 longs per frame                                                                  
+                                                                                                                                            
+  frame_buffer_bytes = frame_bytes * frame_buffers                                                                                          
+  frame_buffer_longs = frame_longs * frame_buffers                                                                                          
+                                                                                                                                            
+                                                                                                                                            
+VAR                                                                                                                                         
+                                                                                                                                            
+  long  cog, tract, pace                                                                                                                    
+                                                                                                                                            
+  long  index, attenuation, sample                      '3 longs       ...must                                                              
+  long  dira_, dirb_, ctra_, ctrb_, frqa_, cnt_         '6 longs       ...be                                                                
+  long  frames[frame_buffer_longs]                      'many longs    ...contiguous                                                        
+                                                                                                                                            
+                                                                                                                                            
+PUB start(tract_ptr, pos_pin, neg_pin, fm_offset) : okay                                                                                    
+                                                                                                                                            
+'' Start vocal tract driver - starts a cog                                                                                                  
+'' returns false if no cog available                                                                                                        
+''                                                                                                                                          
+''   tract_ptr = pointer to vocal tract parameters (13 bytes)                                                                               
+''     pos_pin = positive delta-modulation pin (-1 to disable)                                                                              
+''     neg_pin = negative delta-modulation pin (pos_pin must also be enabled, -1 to disable)                                                
+''   fm_offset = offset frequency for fm aural subcarrier generation (-1 to disable, 4_500_000 for NTSC)                                    
+                                                                                                                                            
+  'Reset driver                                                                                                                             
+  stop                                                                                                                                      
+                                                                                                                                            
+  'Remember vocal tract parameters pointer                                                                                                  
+  tract := tract_ptr                                                                                                                        
+                                                                                                                                            
+  'Initialize pace to 100%                                                                                                                  
+  pace := 100                                                                                                                               
+                                                                                                                                            
+  'If delta-modulation pin(s) enabled, ready output(s) and ready ctrb for duty mode                                                         
+  if pos_pin > -1                                                                                                                           
+    dira_[pos_pin >> 5 & 1] |= |< pos_pin                                                                                                   
+    ctrb_ := $18000000 + pos_pin & $3F                                                                                                      
+    if neg_pin > -1                                                                                                                         
+      dira_[neg_pin >> 5 & 1] |= |< neg_pin                                                                                                 
+      ctrb_ += $04000000 + (neg_pin & $3F) << 9                                                                                             
+                                                                                                                                            
+  'If fm offset is valid, ready ctra for pll mode with divide-by-16 (else disabled)                                                         
+  if fm_offset > -1                                                                                                                         
+    ctra_ := $05800000                                                                                                                      
+                                                                                                                                            
+  'Ready frqa value for fm offset                                                                                                           
+  repeat 33                                                                                                                                 
+    frqa_ <<= 1                                                                                                                             
+    if fm_offset => clkfreq                                                                                                                 
+      fm_offset -= clkfreq                                                                                                                  
+      frqa_++                                                                                                                               
+    fm_offset <<= 1                                                                                                                         
+                                                                                                                                            
+  'Ready 20KHz sample period                                                                                                                
+  cnt_ := clkfreq / 20_000                                                                                                                  
+                                                                                                                                            
+  'Launch vocal tract cog                                                                                                                   
+  return cog := cognew(@entry, @attenuation) + 1                                                                                            
+                                                                                                                                            
+                                                                                                                                            
+PUB stop                                                                                                                                    
+                                                                                                                                            
+'' Stop vocal tract driver - frees a cog                                                                                                    
+                                                                                                                                            
+  'If already running, stop vocal tract cog                                                                                                 
+  if cog                                                                                                                                    
+    cogstop(cog~ -  1)                                                                                                                      
+                                                                                                                                            
+  'Reset variables and buffers
+  longfill(@index, 0, constant(3 + 6 + frame_buffer_longs))
+
+
+PUB set_attenuation(level)
+
+'' Set master attenuation level (0..7, initially 0)
+
+  attenuation := level
+
+
+PUB set_pace(percentage)
+
+'' Set pace to some percentage (initially 100)
+
+  pace := percentage
+
+
+PUB go(time)
+
+'' Queue current parameters to transition over time
+''
+''   actual time = integer(time * 100 / pace) #> 2 * 700µs (at least 1400µs, see set_pace)
+
+  'Wait until frame available (first long will be zeroed)
+  repeat while frames[index]
+
+  'Load parameters into frame
+  bytemove(@frames[index] + 3, tract, 13)
+
+  'Write stepsize into frame (non-0 alerts vocal tract that frame is ready)
+  frames[index] |= $01000000 / (time * 100 / pace #> 2)
+
+  'Increment frame index
+  index := (index + frame_longs) & constant(frame_buffer_longs - 1)
+
+
+PUB full : status
+
+'' Returns true if the parameter queue is full
+'' (useful for checking if "go" would have to wait) 
+
+  return frames[index]
+
+
+PUB empty : status | i
+
+'' Returns true if the parameter queue is empty
+'' (useful for detecting when the vocal tract is finished)
+
+  repeat i from 0 to constant(frame_buffers - 1)
+    if frames[i * frame_longs]
+      return {false}
+  return true
+  
+ 
+PUB sample_ptr : ptr
+
+'' Returns the address of the long which receives the audio samples in real-time
+'' (signed 32-bit values updated at 20KHz)
+
+  return @sample
+  
+
+PUB aural_id : id
+
+'' Returns the id of the cog executing the vocal tract algorithm
+'' (for connecting a broadcast tv driver with the aural subcarrier)
+
+  return cog - 1
+
+
+DAT
+
+' ┌──────────────────┐
+' │  Initialization  │
+' └──────────────────┘
+
+entry                   org
+
+:zero                   mov     reserves,#0             'zero all reserved data
+                        add     :zero,d0
+                        djnz    clear_cnt,#:zero
+
+                        mov     t1,#2*15                'assemble 15 multiply steps into reserves
+:minst                  mov     mult_steps,mult_step    '(saves hub memory)
+                        add     :minst,d0s0             
+                        test    t1,#1           wc
+        if_c            sub     :minst,#2
+                        djnz    t1,#:minst
+                        mov     mult_ret,antilog_ret    'write 'ret' after last instruction
+
+                        mov     t1,#13                  'assemble 13 cordic steps into reserves
+:cstep                  mov     t2,#8                   '(saves hub memory)
+:cinst                  mov     cordic_steps,cordic_step
+                        add     :cinst,d0s0
+                        djnz    t2,#:cinst
+                        sub     :cinst,#8
+                        add     cordic_dx,#1
+                        add     cordic_dy,#1
+                        add     cordic_a,#1
+                        djnz    t1,#:cstep                       
+                        mov     cordic_ret,antilog_ret  'write 'ret' over last instruction
+
+                        mov     t1,par                  'get dira/dirb/ctra/ctrb
+                        add     t1,#2*4
+                        mov     t2,#4
+:regs                   rdlong  dira,t1
+                        add     t1,#4
+                        add     :regs,d0
+                        djnz    t2,#:regs
+
+                        rdlong  frqa_center,t1          'get frqa center
+                        
+                        add     t1,#4                   'get cnt ticks
+                        rdlong  cnt_ticks,t1
+                        
+                        mov     cnt_value,cnt           'prepare for initial waitcnt
+                        add     cnt_value,cnt_ticks
+
+
+' ┌────────────────────┐
+' │  Vocal Tract Loop  │
+' └────────────────────┘
+
+' Wait for next sample period, then output sample
+
+loop                    waitcnt cnt_value,cnt_ticks     'wait for sample period
+
+                        rdlong  t1,par                  'perform master attenuation
+                        sar     x,t1                    
+
+                        mov     t1,x                    'update fm aural subcarrier for tv broadcast
+                        sar     t1,#10
+                        add     t1,frqa_center
+                        mov     frqa,t1
+
+                        mov     t1,x                    'update duty cycle output for pin driving
+                        add     t1,h80000000
+                        mov     frqb,t1
+
+                        mov     t1,par                  'update sample receiver in main memory
+                        add     t1,#1*4
+                        wrlong  x,t1
+
+' White noise source
+
+                        test    lfsr,lfsr_taps  wc      'iterate lfsr three times
+                        rcl     lfsr,#1
+                        test    lfsr,lfsr_taps  wc
+                        rcl     lfsr,#1
+                        test    lfsr,lfsr_taps  wc
+                        rcl     lfsr,#1
+
+' Aspiration
+
+                        mov     t1,aa                   'aspiration amplitude
+                        mov     t2,lfsr
+                        call    #mult
+                        
+                        sar     t1,#8                   'set x
+                        mov     x,t1
+
+' Vibrato
+
+                        mov     t1,vr                   'vibrato rate
+                        shr     t1,#10
+                        add     vphase,t1
+
+                        mov     t1,vp                   'vibrato pitch
+                        mov     t2,vphase
+                        call    #sine
+                        
+                        add     t1,gp                   'sum glottal pitch (+) into vibrato pitch (+/-)
+
+' Glottal pulse
+
+                        shr     t1,#2                   'divide final pitch by 3 to mesh with                                                                   
+                        mov     t2,t1                   '...12 notes/octave musical scale
+                        shr     t2,#2                   '(multiply by %0.0101010101010101)
+                        add     t1,t2                                                             
+                        mov     t2,t1
+                        shr     t2,#4
+                        add     t1,t2
+                        mov     t2,t1
+                        shr     t2,#8
+                        add     t1,t2
+
+                        add     t1,tune                 'tune scale so that gp=100 produces 110.00Hz (A2)
+
+                        call    #antilog                'convert pitch (log frequency) to phase delta
+                        add     gphase,t2              
+
+                        mov     t1,gphase               'convert phase to glottal pulse sample
+                        call    #antilog    
+                        sub     t2,h40000000
+                        mov     t1,ga
+                        call    #sine
+
+                        sar     t1,#6                   'add to x
+                        add     x,t1
+
+' Vocal tract formants
+
+                        mov     y,#0                    'reset y
+
+                        mov     a,f1                    'formant1, sum and rotate (x,y) 
+                        add     x,f1x                   
+                        add     y,f1y
+                        call    #cordic
+                        mov     f1x,x
+                        mov     f1y,y
+
+                        mov     a,f2                    'formant2, sum and rotate (x,y) 
+                        add     x,f2x                   
+                        add     y,f2y
+                        call    #cordic
+                        mov     f2x,x
+                        mov     f2y,y
+
+                        mov     a,f3                    'formant3, sum and rotate (x,y) 
+                        add     x,f3x                  
+                        add     y,f3y
+                        call    #cordic
+                        mov     f3x,x
+                        mov     f3y,y
+               
+                        mov     a,f4                    'formant4, sum and rotate (x,y)    
+                        add     x,f4x                  
+                        add     y,f4y
+                        call    #cordic
+                        mov     f4x,x
+                        mov     f4y,y
+
+' Nasal anti-formant
+
+                        add     nx,x                    'subtract from x (nx negated)
+
+                        mov     a,nf                    'nasal frequency
+                        call    #cordic
+
+                        mov     t1,na                   'nasal amplitude
+                        mov     t2,x
+                        call    #mult
+                        
+                        mov     x,nx                    'restore x
+                        neg     nx,t1                   'negate nx
+                        
+' Frication
+
+                        mov     t1,lfsr                 'phase noise
+                        sar     t1,#3
+                        add     fphase,t1
+                        sar     t1,#1
+                        add     fphase,t1
+
+                        mov     t1,ff                   'frication frequency
+                        shr     t1,#1
+                        add     fphase,t1
+
+                        mov     t1,fa                   'frication amplitude
+                        mov     t2,fphase
+                        call    #sine
+                        
+                        add     x,t1                    'add to x
+
+' Handle frame
+
+                        jmp     :ret                    'run segment of frame handler, return to loop
+
+
+' ┌─────────────────┐
+' │  Frame Handler  │
+' └─────────────────┘
+
+:ret                    long    :wait                   'pointer to next frame handler routine
+
+
+:wait                   jmpret  :ret,#loop              '(6 or 17.5 cycles)
+                        mov     frame_ptr,par           'check for next frame
+                        add     frame_ptr,#8*4          'point past miscellaneous data
+                        add     frame_ptr,frame_index   'point to start of frame
+                        rdlong  step_size,frame_ptr     'get stepsize
+                        and     step_size,h00FFFFFF  wz 'isolate stepsize and check if not 0
+        if_nz           jmp     #:next                  'if not 0, next frame ready
+        
+
+                        mov     :final1,:finali         'no frame ready, ready to finalize parameters
+                        mov     frame_cnt,#13           'iterate aa..ff
+
+:final                  jmpret  :ret,#loop              '(13.5 or 4 cycles)
+:final1                 mov     par_curr,par_next       'current parameter = next parameter
+                        add     :final1,d0s0            'update pointers
+                        djnz    frame_cnt,#:final       'another parameter?
+                        
+                        jmp     #:wait                  'check for next frame
+
+
+:next                   add     step_size,#1            'next frame ready, insure accurate accumulation
+                        mov     step_acc,step_size      'initialize step accumulator                    
+
+
+                        movs    :set1,#par_next         'ready to get parameters and steps for aa..ff
+                        movd    :set2,#par_curr   
+                        movd    :set3,#par_next
+                        movd    :set4,#par_step
+                        add     frame_ptr,#3            'point to first parameter
+                        mov     frame_cnt,#13           'iterate aa..ff
+
+:set                    jmpret  :ret,#loop              '(19.5 or 46.5 cycles)
+                        rdbyte  t1,frame_ptr            'get new parameter
+                        shl     t1,#24                  'msb justify
+:set1                   mov     t2,par_next             'get next parameter
+:set2                   mov     par_curr,t2             'current parameter = next parameter
+:set3                   mov     par_next,t1             'next parameter = new parameter
+                        sub     t1,t2           wc      'get next-current delta with sign in c            
+                        negc    t1,t1                   'make delta absolute (by c, not msb)
+                        rcl     vscl,#1         wz, nr  'save sign into nz (vscl unaffected)
+
+                        mov     t2,#8                   'multiply delta by step size
+:mult                   shl     t1,#1           wc
+        if_c            add     t1,step_size
+                        djnz    t2,#:mult
+
+:set4                   negnz    par_step,t1            'set signed step
+
+                        add     :set1,#1                'update pointers for next parameter+step
+                        add     :set2,d0
+                        add     :set3,d0
+                        add     :set4,d0
+                        add     frame_ptr,#1
+                        djnz    frame_cnt,#:set         'another parameter?
+
+
+:stepframe              jmpret  :ret,#loop              '(47.5 or 8 cycles)
+                        mov     :step1,:stepi           'ready to step parameters
+                        mov     frame_cnt,#13           'iterate aa..ff
+                        
+:step                   jmpret  :ret,#loop              '(3 or 4 cycles)
+:step1                  add     par_curr,par_step       'step parameter
+                        add     :step1,d0s0             'update pointers for next parameter+step
+                        djnz    frame_cnt,#:step        'another parameter?
+                        
+                        add     step_acc,step_size      'accumulate frame steps
+                        test    step_acc,h01000000  wc  'check for frame steps done
+        if_nc           jmp     #:stepframe             'another frame step?
+
+        
+                        sub     frame_ptr,#frame_bytes  'zero stepsize in frame to signal frame done
+                        wrlong  vscl,frame_ptr
+
+                        add     frame_index,#frame_bytes'point to next frame
+                        and     frame_index,#frame_buffer_bytes - 1
+                        
+                        jmp     #:wait                  'check for next frame
+
+
+:finali                 mov     par_curr,par_next       'instruction used to finalize parameters                 
+:stepi                  add     par_curr,par_step       'instruction used to step parameters               
+
+
+' ┌────────────────────┐
+' │  Math Subroutines  │
+' └────────────────────┘
+
+' Antilog
+'
+'   in:         t1 = log (top 4 bits = whole number, next 11 bits = fraction)
+'
+'   out:        t2 = antilog ($00010000..$FFEA0000)
+
+antilog                 mov     t2,t1                   
+                        shr     t2,#16                  'position 11-bit fraction
+                        shr     t1,#16+12               'position 4-bit whole number
+                        and     t2,h00000FFE            'get table offset
+                        or      t2,h0000D000            'get table base
+                        rdword  t2,t2                   'lookup fractional antilog
+                        or      t2,h00010000            'insert leading bit
+                        shl     t2,t1                   'shift up by whole number
+
+antilog_ret             ret
+
+
+' Scaled sine
+'
+'   in:         t1 = unsigned scale (15 top bits used)
+'               t2 = angle (13 top bits used)
+'
+'   out:        t1 = 17-bit * 15-bit scaled sine ($80014000..$7FFEC000)
+
+sine                    shr     t2,#32-13               'get 13-bit angle
+                        test    t2,h00001000    wz      'get sine quadrant 3|4 into nz
+                        test    t2,h00000800    wc      'get sine quadrant 2|4 into c
+                        negc    t2,t2                   'if sine quadrant 2|4, negate table offset
+                        or      t2,h00007000            'insert sine table base address >> 1
+                        shl     t2,#1                   'shift left to get final word address
+                        rdword  t2,t2                   'read sine word from table
+                        negnz   t2,t2                   'if quadrant 3|4, negate word
+                        shl     t2,#15                  'msb-justify result
+                                                        'multiply follows...
+
+' Multiply
+'                                                                                             
+'   in:         t1 = unsigned multiplier (15 top bits used)
+'               t2 = signed multiplicand (17 top bits used)
+'
+'   out:        t1 = 32-bit signed product
+
+mult                    shr     t1,#32-15               'position unsigned multiplier
+
+                        sar     t2,#15                  'position signed multiplicand
+                        shl     t2,#15-1
+
+                        jmp     #mult_steps             'do multiply steps
+
+
+mult_step               sar     t1,#1           wc      'multiply step that gets assembled into reserves (x15)
+        if_c            add     t1,t2                   
+
+
+' Cordic rotation
+'
+'   in:          a = 0 to <90 degree angle (~13 top bits used)
+'              x,y = signed coordinates     
+'
+'   out:       x,y = scaled and rotated signed coordinates
+
+cordic                  sar     x,#1                    'multiply (x,y) by %0.10011001 (0.60725 * 0.984)                   
+                        mov     t1,x                    '...for cordic pre-scaling and slight damping         
+                        sar     t1,#3
+                        add     x,t1
+                        mov     t1,x
+                        sar     t1,#4
+                        add     x,t1
+                        
+                        sar     y,#1
+                        mov     t1,y
+                        sar     t1,#3
+                        add     y,t1
+                        mov     t1,y
+                        sar     t1,#4
+                        add     y,t1
+
+                        mov     t1,x                    'do first cordic step
+                        sub     x,y
+                        add     y,t1
+                        sub     a,h80000000     wc
+
+                        jmp     #cordic_steps+1         'do subsequent cordic steps (skip first instruction)
+
+
+cordic_step             mov     a,a             wc      'cordic step that gets assembled into reserves (x13)
+                        mov     t1,y                    
+cordic_dx               sar     t1,#1                   '(source incremented for each step)
+                        mov     t2,x
+cordic_dy               sar     t2,#1                   '(source incremented for each step)
+                        sumnc   x,t1
+                        sumc    y,t2
+cordic_a                sumnc   a,cordic_delta          '(source incremented for each step)
+
+
+' ┌────────────────┐
+' │  Defined Data  │
+' └────────────────┘
+
+tune                    long    $66920000               'scale tuned to 110.00Hz at gp=100 (manually calibrated)
+
+lfsr                    long    1                       'linear feedback shift register for noise generation
+lfsr_taps               long    $80061000
+
+cordic_delta            long    $4B901476               'cordic angle deltas (first is h80000000)
+                        long    $27ECE16D
+                        long    $14444750
+                        long    $0A2C350C
+                        long    $05175F85
+                        long    $028BD879                                       
+                        long    $0145F154
+                        long    $00A2F94D
+                        long    $00517CBB
+                        long    $0028BE60
+                        long    $00145F30
+                        long    $000A2F98
+
+h80000000               long    $80000000               'miscellaneous constants greater than 9 bits
+h40000000               long    $40000000
+h01000000               long    $01000000
+h00FFFFFF               long    $00FFFFFF
+h00010000               long    $00010000        
+h0000D000               long    $0000D000
+h00007000               long    $00007000
+h00001000               long    $00001000
+h00000FFE               long    $00000FFE
+h00000800               long    $00000800
+
+d0                      long    $00000200               'destination/source field increments
+d0s0                    long    $00000201
+
+clear_cnt               long    $1F0 - reserves         'number of reserved registers to clear on startup
+
+
+' ┌──────────────────────────────────────────────────┐
+' │  Undefined Data (zeroed by initialization code)  │
+' └──────────────────────────────────────────────────┘
+
+reserves
+
+frqa_center             res     1                       'reserved registers that get cleared on startup
+
+cnt_ticks               res     1
+cnt_value               res     1
+
+frame_index             res     1
+frame_ptr               res     1
+frame_cnt               res     1
+
+step_size               res     1
+step_acc                res     1
+                                                
+vphase                  res     1
+gphase                  res     1
+fphase                  res     1
+
+f1x                     res     1
+f1y                     res     1
+f2x                     res     1
+f2y                     res     1
+f3x                     res     1
+f3y                     res     1
+f4x                     res     1
+f4y                     res     1
+nx                      res     1
+
+a                       res     1
+x                       res     1
+y                       res     1
+
+t1                      res     1
+t2                      res     1
+
+par_curr                                                '*** current parameters
+aa                      res     1                       'aspiration amplitude
+ga                      res     1                       'glottal amplitude       
+gp                      res     1                       'glottal pitch
+vp                      res     1                       'vibrato pitch           
+vr                      res     1                       'vibrato rate            
+f1                      res     1                       'formant1 frequency      
+f2                      res     1                       'formant2 frequency
+f3                      res     1                       'formant3 frequency
+f4                      res     1                       'formant4 frequency
+na                      res     1                       'nasal amplitude
+nf                      res     1                       'nasal frequency
+fa                      res     1                       'frication amplitude
+ff                      res     1                       'frication frequency
+
+par_next                res     13                      '*** next parameters
+par_step                res     13                      '*** parameter steps
+
+
+mult_steps              res     2 * 15                  'assembly area for multiply steps w/ret
+mult_ret
+sine_ret                res     1
+
+cordic_steps            res     8 * 13 - 1              'assembly area for cordic steps w/ret
+cordic_ret              res     1
+
+{{
+
+┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│                                                   TERMS OF USE: MIT License                                                  │                                                            
+├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation    │ 
+│files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,    │
+│modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│
+│is furnished to do so, subject to the following conditions:                                                                   │
+│                                                                                                                              │
+│The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│
+│                                                                                                                              │
+│THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE          │
+│WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR         │
+│COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,   │
+│ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                         │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
+}}

samples/Python/AdditiveWave.pyde

@@ -0,0 +1,63 @@
+"""
+Additive Wave
+by Daniel Shiffman. 
+
+Create a more complex wave by adding two waves together. 
+"""
+
+xspacing = 8    # How far apart should each horizontal location be spaced
+maxwaves = 4    # total # of waves to add together
+theta = 0.0
+
+amplitude = []  # Height of wave
+# Value for incrementing X, to be calculated as a function of period and
+# xspacing
+dx = []
+yvalues = []
+
+
+def setup():
+    size(640, 360)
+    frameRate(30)
+    colorMode(RGB, 255, 255, 255, 100)
+    w = width + 16
+    for i in range(maxwaves):
+        amplitude.append(random(10, 30))
+        period = random(100, 300)  # How many pixels before the wave repeats
+        dx.append((TWO_PI / period) * xspacing)
+    for _ in range(w / xspacing + 1):
+        yvalues.append(0.0)
+
+
+def draw():
+    background(0)
+    calcWave()
+    renderWave()
+
+
+def calcWave():
+    # Increment theta (try different values for 'angular velocity' here
+    theta += 0.02
+    # Set all height values to zero
+    for i in range(len(yvalues)):
+        yvalues[i] = 0
+    # Accumulate wave height values
+    for j in range(maxwaves):
+        x = theta
+        for i in range(len(yvalues)):
+            # Every other wave is cosine instead of sine
+            if j % 2 == 0:
+                yvalues[i] += sin(x) * amplitude[j]
+            else:
+                yvalues[i] += cos(x) * amplitude[j]
+            x += dx[j]
+
+
+def renderWave():
+    # A simple way to draw the wave with an ellipse at each location
+    noStroke()
+    fill(255, 50)
+    ellipseMode(CENTER)
+    for x, v in enumerate(yvalues):
+        ellipse(x * xspacing, height / 2 + v, 16, 16)
+

samples/Python/Cinema4DPythonPlugin.pyp

@@ -0,0 +1,241 @@
+#
+# Cinema 4D Python Plugin Source file
+# https://github.com/nr-plugins/nr-xpresso-alignment-tools
+#
+
+# coding: utf-8
+#
+# Copyright (C) 2012, Niklas Rosenstein
+# Licensed under the GNU General Public License
+#
+# XPAT - XPresso Alignment Tools
+# ==============================
+#
+# The XPAT plugin provides tools for aligning nodes in the Cinema 4D
+# XPresso Editor, improving readability of complex XPresso set-ups
+# immensively.
+#
+# Requirements:
+# - MAXON Cinema 4D R13+
+# - Python `c4dtools` library. Get it from
+#   http://github.com/NiklasRosenstein/c4dtools
+#
+# Author:  Niklas Rosenstein <rosensteinniklas@gmail.com>
+# Version: 1.1 (01/06/2012)
+
+import os
+import sys
+import json
+import c4d
+import c4dtools
+import itertools
+
+from c4d.modules import graphview as gv
+from c4dtools.misc import graphnode
+
+res, importer = c4dtools.prepare(__file__, __res__)
+settings = c4dtools.helpers.Attributor({
+    'options_filename': res.file('config.json'),
+})
+
+def align_nodes(nodes, mode, spacing):
+    r"""
+    Aligns the passed nodes horizontally and apply the minimum spacing
+    between them.
+    """
+
+    modes = ['horizontal', 'vertical']
+    if not nodes:
+        return
+    if mode not in modes:
+        raise ValueError('invalid mode, choices are: ' + ', '.join(modes))
+
+    get_0 = lambda x: x.x
+    get_1 = lambda x: x.y
+    set_0 = lambda x, v: setattr(x, 'x', v)
+    set_1 = lambda x, v: setattr(x, 'y', v)
+
+    if mode == 'vertical':
+        get_0, get_1 = get_1, get_0
+        set_0, set_1 = set_1, set_0
+
+    nodes = [graphnode.GraphNode(n) for n in nodes]
+    nodes.sort(key=lambda n: get_0(n.position))
+    midpoint = graphnode.find_nodes_mid(nodes)
+
+    # Apply the spacing between the nodes relative to the coordinate-systems
+    # origin. We can offset them later because we now the nodes' midpoint
+    # already.
+    first_position = nodes[0].position
+    new_positions = []
+    prev_offset = 0
+    for node in nodes:
+        # Compute the relative position of the node.
+        position = node.position
+        set_0(position, get_0(position) - get_0(first_position))
+
+        # Obtain it's size and check if the node needs to be re-placed.
+        size = node.size
+        if get_0(position) < prev_offset:
+            set_0(position, prev_offset)
+            prev_offset += spacing + get_0(size)
+        else:
+            prev_offset = get_0(position) + get_0(size) + spacing
+
+        set_1(position, get_1(midpoint))
+        new_positions.append(position)
+
+    # Center the nodes again.
+    bbox_size = prev_offset - spacing
+    bbox_size_2 = bbox_size * 0.5
+    for node, position in itertools.izip(nodes, new_positions):
+        # TODO: Here is some issue with offsetting the nodes. Some value
+        # dependent on the spacing must be added here to not make the nodes
+        # move horizontally/vertically although they have already been
+        # aligned.
+        set_0(position, get_0(midpoint) + get_0(position) - bbox_size_2 + spacing)
+        node.position = position
+
+def align_nodes_shortcut(mode, spacing):
+    master = gv.GetMaster(0)
+    if not master:
+        return
+
+    root = master.GetRoot()
+    if not root:
+        return
+
+    nodes = graphnode.find_selected_nodes(root)
+    if nodes:
+        master.AddUndo()
+        align_nodes(nodes, mode, spacing)
+        c4d.EventAdd()
+
+    return True
+
+class XPAT_Options(c4dtools.helpers.Attributor):
+    r"""
+    This class organizes the options for the XPAT plugin, i.e.
+    validating, loading and saving.
+    """
+
+    defaults = {
+        'hspace': 50,
+        'vspace': 20,
+    }
+
+    def __init__(self, filename=None):
+        super(XPAT_Options, self).__init__()
+        self.load(filename)
+
+    def load(self, filename=None):
+        r"""
+        Load the options from file pointed to by filename. If filename
+        is None, it defaults to the filename defined in options in the
+        global scope.
+        """
+
+        if filename is None:
+            filename = settings.options_filename
+
+        if os.path.isfile(filename):
+            self.dict_ = self.defaults.copy()
+            with open(filename, 'rb') as fp:
+                self.dict_.update(json.load(fp))
+        else:
+            self.dict_ = self.defaults.copy()
+            self.save()
+
+    def save(self, filename=None):
+        r"""
+        Save the options defined in XPAT_Options instance to HD.
+        """
+
+        if filename is None:
+            filename = settings.options_filename
+
+        values = dict((k, v) for k, v in self.dict_.iteritems()
+                      if k in self.defaults)
+        with open(filename, 'wb') as fp:
+            json.dump(values, fp)
+
+class XPAT_OptionsDialog(c4d.gui.GeDialog):
+    r"""
+    This class implements the behavior of the XPAT options dialog,
+    taking care of storing the options on the HD and loading them
+    again on startup.
+    """
+
+    # c4d.gui.GeDialog
+
+    def CreateLayout(self):
+        return self.LoadDialogResource(res.DLG_OPTIONS)
+
+    def InitValues(self):
+        self.SetLong(res.EDT_HSPACE, options.hspace)
+        self.SetLong(res.EDT_VSPACE, options.vspace)
+        return True
+
+    def Command(self, id, msg):
+        if id == res.BTN_SAVE:
+            options.hspace = self.GetLong(res.EDT_HSPACE)
+            options.vspace = self.GetLong(res.EDT_VSPACE)
+            options.save()
+            self.Close()
+        return True
+
+class XPAT_Command_OpenOptionsDialog(c4dtools.plugins.Command):
+    r"""
+    This Cinema 4D CommandData plugin opens the XPAT options dialog
+    when being executed.
+    """
+
+    def __init__(self):
+        super(XPAT_Command_OpenOptionsDialog, self).__init__()
+        self._dialog = None
+
+    @property
+    def dialog(self):
+        if not self._dialog:
+            self._dialog = XPAT_OptionsDialog()
+        return self._dialog
+
+    # c4dtools.plugins.Command
+
+    PLUGIN_ID = 1029621
+    PLUGIN_NAME = res.string.XPAT_COMMAND_OPENOPTIONSDIALOG()
+    PLUGIN_HELP = res.string.XPAT_COMMAND_OPENOPTIONSDIALOG_HELP()
+
+    # c4d.gui.CommandData
+
+    def Execute(self, doc):
+        return self.dialog.Open(c4d.DLG_TYPE_MODAL)
+
+class XPAT_Command_AlignHorizontal(c4dtools.plugins.Command):
+
+    PLUGIN_ID = 1029538
+    PLUGIN_NAME = res.string.XPAT_COMMAND_ALIGNHORIZONTAL()
+    PLUGIN_ICON = res.file('xpresso-align-h.png')
+    PLUGIN_HELP = res.string.XPAT_COMMAND_ALIGNHORIZONTAL_HELP()
+
+    def Execute(self, doc):
+        align_nodes_shortcut('horizontal', options.hspace)
+        return True
+
+class XPAT_Command_AlignVertical(c4dtools.plugins.Command):
+
+    PLUGIN_ID = 1029539
+    PLUGIN_NAME = res.string.XPAT_COMMAND_ALIGNVERTICAL()
+    PLUGIN_ICON = res.file('xpresso-align-v.png')
+    PLUGIN_HELP = res.string.XPAT_COMMAND_ALIGNVERTICAL_HELP()
+
+    def Execute(self, doc):
+        align_nodes_shortcut('vertical', options.vspace)
+        return True
+
+options = XPAT_Options()
+
+if __name__ == '__main__':
+    c4dtools.plugins.main()
+
+

samples/Python/MoveEye.pyde

@@ -0,0 +1,29 @@
+"""
+ * Move Eye. 
+ * by Simon Greenwold.
+ * 
+ * The camera lifts up (controlled by mouseY) while looking at the same point.
+ """
+
+
+def setup():
+    size(640, 360, P3D)
+    fill(204)
+
+
+def draw():
+    lights()
+    background(0)
+
+    # Change height of the camera with mouseY
+    camera(30.0, mouseY, 220.0,  # eyeX, eyeY, eyeZ
+           0.0, 0.0, 0.0,        # centerX, centerY, centerZ
+           0.0, 1.0, 0.0)        # upX, upY, upZ
+
+    noStroke()
+    box(90)
+    stroke(255)
+    line(-100, 0, 0, 100, 0, 0)
+    line(0, -100, 0, 0, 100, 0)
+    line(0, 0, -100, 0, 0, 100)
+

samples/QMake/complex.pro

@@ -0,0 +1,30 @@
+# This QMake file is complex, as it usese
+# boolean operators and function calls
+
+QT += core gui
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+# We could use some OpenGL right now
+contains(QT_CONFIG, opengl) | contains(QT_CONFIG, opengles2) {
+   QT += opengl
+} else {
+   DEFINES += QT_NO_OPENGL
+}
+
+TEMPLATE = app
+win32 {
+    TARGET = BlahApp
+    RC_FILE = Resources/winres.rc
+}
+!win32 { TARGET = blahapp }
+
+# Let's add a PRI file!
+include(functions.pri)
+
+SOURCES += file.cpp
+
+HEADERS  += file.h
+
+FORMS    += file.ui
+
+RESOURCES += res.qrc

samples/QMake/functions.pri

@@ -0,0 +1,8 @@
+# QMake include file that calls some functions
+# and does nothing else...
+
+exists(.git/HEAD) {
+    system(git rev-parse HEAD >rev.txt)
+} else {
+    system(echo ThisIsNotAGitRepo >rev.txt)
+}

samples/QMake/qmake.script!

@@ -0,0 +1,2 @@
+#!/usr/bin/qmake
+message(This is QMake.)

samples/QMake/simple.pro

@@ -0,0 +1,17 @@
+# Simple QMake file
+
+CONFIG += qt
+QT += core gui
+TEMPLATE = app
+TARGET = simpleapp
+
+SOURCES += file.cpp \
+    file2.c \
+    This/Is/Folder/file3.cpp
+
+HEADERS += file.h \
+    file2.h \
+    This/Is/Folder/file3.h
+
+FORMS += This/Is/Folder/file3.ui \
+    Test.ui

samples/R/filenames/expr-dist

@@ -0,0 +1,101 @@
+#!/usr/bin/env Rscript
+
+# Copyright (c) 2013 Daniel S. Standage, released under MIT license
+#
+# expr-dist: plot distributions of expression values before and after
+#            normalization; visually confirm that normalization worked
+#            as expected
+#
+# Program input is a matrix of expression values, each row corresponding to a
+# molecule (gene, transcript, etc) and each row corresponding to that molecule's
+# expression level or abundance. The program expects the rows and columns to be
+# named, and was tested primarily on output produced by the
+# 'rsem-generate-data-matrix' script distributed with the RSEM package.
+#
+# The program plots the distributions of the logged expression values by sample
+# as provided, then normalizes the values, and finally plots the distribution of
+# the logged normalized expression values by sample. The expectation is that all
+# samples' distributions will have a similar shape but different medians prior
+# to normalization, and that post normalization they will all have an identical
+# median to facilitate cross-sample comparison.
+
+
+# MedianNorm function borrowed from the EBSeq library version 1.1.6
+# See http://www.bioconductor.org/packages/devel/bioc/html/EBSeq.html
+MedianNorm <- function(data)
+{
+  geomeans <- exp( rowMeans(log(data)) )
+  apply(data, 2, function(cnts) median((cnts/geomeans)[geomeans > 0]))
+}
+
+library("getopt")
+print_usage <- function(file=stderr())
+{
+  cat("
+expr-dist: see source code for full description
+Usage: expr-dist [options] < expr-matrix.txt
+  Options:
+    -h|--help:          print this help message and exit
+    -o|--out: STRING    prefix for output files; default is 'expr-dist'
+    -r|--res: INT       resolution (dpi) of generated graphics; default is 150
+    -t|--height: INT    height (pixels) of generated graphics; default is 1200
+    -w|--width: INT     width (pixels) of generated graphics; default is 1200
+    -y|--ylim: REAL     the visible range of the Y axis depends on the first
+                        distribution plotted; if other distributions are getting
+                        cut off, use this setting to override the default\n\n")
+}
+
+spec <- matrix( c("help",   'h', 0, "logical",
+                  "out",    'o', 1, "character",
+                  "res",    'r', 1, "integer",
+                  "height", 't', 1, "integer",
+                  "width",  'w', 1, "integer",
+                  "ylim",   'y', 1, "double"),
+                byrow=TRUE, ncol=4)
+opt  <- getopt(spec)
+if(!is.null(opt$help))
+{
+  print_usage(file=stdout())
+  q(status=1)
+}
+if(is.null(opt$height)) { opt$height <- 1200           }
+if(is.null(opt$out))    { opt$out    <- "expr-dist"    }
+if(is.null(opt$res))    { opt$res    <- 150            }
+if(is.null(opt$width))  { opt$width  <- 1200           }
+if(!is.null(opt$ylim))  { opt$ylim   <- c(0, opt$ylim) }
+
+# Load data, determine number of samples
+data  <- read.table(file("stdin"), header=TRUE, sep="\t", quote="")
+nsamp <- dim(data)[2] - 1
+data  <- data[,1:nsamp+1]
+
+# Plot distribution of expression values before normalization
+outfile <- sprintf("%s-median.png", opt$out)
+png(outfile, height=opt$height, width=opt$width, res=opt$res)
+h <- hist(log(data[,1]), plot=FALSE)
+plot(h$mids, h$density, type="l", col=rainbow(nsamp)[1], main="",
+     xlab="Log expression value", ylab="Proportion of molecules", ylim=opt$ylim)
+for(i in 2:nsamp)
+{
+  h <- hist(log(data[,i]), plot=FALSE)
+  lines(h$mids, h$density, col=rainbow(nsamp)[i])
+}
+devnum <- dev.off()
+
+# Normalize by median
+size.factors <- MedianNorm(data.matrix(data))
+data.norm <- t(apply(data, 1, function(x){ x / size.factors }))
+
+# Plot distribution of normalized expression values
+outfile <- sprintf("%s-median-norm.png", opt$out)
+png(outfile, height=opt$height, width=opt$width, res=opt$res)
+h <- hist(log(data.norm[,1]), plot=FALSE)
+plot(h$mids, h$density, type="l", col=rainbow(nsamp)[1], main="",
+     xlab="Log normalized expression value", ylab="Proportion of molecules",
+     ylim=opt$ylim)
+for(i in 2:nsamp)
+{
+  h <- hist(log(data.norm[,i]), plot=FALSE)
+  lines(h$mids, h$density, col=rainbow(nsamp)[i])
+}
+devnum <- dev.off()

samples/R/import.r

@@ -0,0 +1,201 @@
+#' Import a module into the current scope
+#'
+#' \code{module = import('module')} imports a specified module and makes its
+#' code available via the environment-like object it returns.
+#'
+#' @param module an identifier specifying the full module path
+#' @param attach if \code{TRUE}, attach the newly loaded module to the object
+#'      search path (see \code{Details})
+#' @param attach_operators if \code{TRUE}, attach operators of module to the
+#'      object search path, even if \code{attach} is \code{FALSE}
+#' @return the loaded module environment (invisible)
+#'
+#' @details Modules are loaded in an isolated environment which is returned, and
+#' optionally attached to the object search path of the current scope (if
+#' argument \code{attach} is \code{TRUE}).
+#' \code{attach} defaults to \code{FALSE}. However, in interactive code it is
+#' often helpful to attach packages by default. Therefore, in interactive code
+#' invoked directly from the terminal only (i.e. not within modules),
+#' \code{attach} defaults to the value of \code{options('import.attach')}, which
+#' can be set to \code{TRUE} or \code{FALSE} depending on the user’s preference.
+#'
+#' \code{attach_operators} causes \emph{operators} to be attached by default,
+#' because operators can only be invoked in R if they re found in the search
+#' path. Not attaching them therefore drastically limits a module’s usefulness.
+#'
+#' Modules are searched in the module search path \code{options('import.path')}.
+#' This is a vector of paths to consider, from the highest to the lowest
+#' priority. The current directory is \emph{always} considered first. That is,
+#' if a file \code{a.r} exists both in the current directory and in a module
+#' search path, the local file \code{./a.r} will be loaded.
+#'
+#' Module names can be fully qualified to refer to nested paths. See
+#' \code{Examples}.
+#'
+#' @note Unlike for packages, attaching happens \emph{locally}: if
+#' \code{import} is executed in the global environment, the effect is the same.
+#' Otherwise, the imported module is inserted as the parent of the current
+#' \code{environment()}. When used (globally) \emph{inside} a module, the newly
+#' imported module is only available inside the module’s search path, not
+#' outside it (nor in other modules which might be loaded).
+#'
+#' @examples
+#' # `a.r` is a file in the local directory containing a function `f`.
+#' a = import('a')
+#' a$f()
+#'
+#' # b/c.r is a file in path `b`, containing a function `g`.
+#' import('b/c', attach = TRUE)
+#' g() # No module name qualification necessary
+#'
+#' @seealso \code{unload}
+#' @seealso \code{reload}
+#' @seealso \code{module_name}
+#' @export
+import = function (module, attach, attach_operators = TRUE) {
+    module = substitute(module)
+    stopifnot(inherits(module, 'name'))
+
+    if (missing(attach)) {
+        attach = if (interactive() && is.null(module_name()))
+            getOption('import.attach', FALSE)
+        else
+            FALSE
+    }
+
+    stopifnot(class(attach) == 'logical' && length(attach) == 1)
+
+    module_path = try(find_module(module), silent = TRUE)
+
+    if (inherits(module_path, 'try-error'))
+        stop(attr(module_path, 'condition')$message)
+
+    containing_modules = module_init_files(module, module_path)
+    mapply(do_import, names(containing_modules), containing_modules)
+
+    mod_ns = do_import(as.character(module), module_path)
+    module_parent = parent.frame()
+    mod_env = exhibit_namespace(mod_ns, as.character(module), module_parent)
+
+    if (attach) {
+        if (identical(module_parent, .GlobalEnv))
+            attach(mod_env, name = environmentName(mod_env))
+        else
+            parent.env(module_parent) = mod_env
+    }
+    else if (attach_operators)
+        export_operators(mod_ns, module_parent)
+
+    invisible(mod_env)
+}
+
+do_import = function (module_name, module_path) {
+    if (is_module_loaded(module_path))
+        return(get_loaded_module(module_path))
+
+    # The namespace contains a module’s content. This schema is very much like
+    # R package organisation.
+    # A good resource for this is:
+    # <http://obeautifulcode.com/R/How-R-Searches-And-Finds-Stuff/>
+    namespace = structure(new.env(parent = .BaseNamespaceEnv),
+                          name = paste('namespace', module_name, sep = ':'),
+                          path = module_path,
+                          class = c('namespace', 'environment'))
+    local(source(attr(environment(), 'path'), chdir = TRUE, local = TRUE),
+          envir = namespace)
+    cache_module(namespace)
+    namespace
+}
+
+exhibit_namespace = function (namespace, name, parent) {
+    exported_functions = lsf.str(namespace)
+    # Skip one parent environment because this module is hooked into the chain
+    # between the calling environment and its ancestor, thus sitting in its
+    # local object search path.
+    structure(list2env(sapply(exported_functions, get, envir = namespace),
+                       parent = parent.env(parent)),
+              name = paste('module', name, sep = ':'),
+              path = module_path(namespace),
+              class = c('module', 'environment'))
+}
+
+export_operators = function (namespace, parent) {
+    # `$` cannot be overwritten, but it is generic so S3 variants of it can be
+    # defined. We therefore test it as well.
+    ops = c('+', '-', '*', '/', '^', '**', '&', '|', ':', '::', ':::', '$', '=',
+            '<-', '<<-', '==', '<', '<=', '>', '>=', '!=', '~', '&&', '||')
+
+    is_predefined = function (f) f %in% ops
+
+    is_op = function (f) {
+        prefix = strsplit(f, '\\.')[[1]][1]
+        is_predefined(prefix) || grepl('^%.*%$', prefix)
+    }
+
+    operators = Filter(is_op, lsf.str(namespace))
+    name = module_name(namespace)
+    # Skip one parent environment because this module is hooked into the chain
+    # between the calling environment and its ancestor, thus sitting in its
+    # local object search path.
+    op_env = structure(list2env(sapply(operators, get, envir = namespace),
+                                parent = parent.env(parent)),
+                       name = paste('operators', name, sep = ':'),
+                       path = module_path(namespace),
+                       class = c('module', 'environment'))
+
+    if (identical(parent, .GlobalEnv))
+        attach(op_env, name = environmentName(op_env))
+    else
+        parent.env(parent) = op_env
+}
+
+#' Unload a given module
+#'
+#' Unset the module variable that is being passed as a parameter, and remove the
+#' loaded module from cache.
+#' @param module reference to the module which should be unloaded
+#' @note Any other references to the loaded modules remain unchanged, and will
+#' still work. However, subsequently importing the module again will reload its
+#' source files, which would not have happened without \code{unload}.
+#' Unloading modules is primarily useful for testing during development, and
+#' should not be used in production code.
+#'
+#' \code{unload} does not currently detach environments.
+#' @seealso \code{import}
+#' @seealso \code{reload}
+#' @export
+unload = function (module) {
+    stopifnot(inherits(module, 'module'))
+    module_ref = as.character(substitute(module))
+    rm(list = module_path(module), envir = .loaded_modules)
+    # unset the module reference in its scope, i.e. the caller’s environment or
+    # some parent thereof.
+    rm(list = module_ref, envir = parent.frame(), inherits = TRUE)
+}
+
+#' Reload a given module
+#'
+#' Remove the loaded module from the cache, forcing a reload. The newly reloaded
+#' module is assigned to the module reference in the calling scope.
+#' @param module reference to the module which should be unloaded
+#' @note Any other references to the loaded modules remain unchanged, and will
+#' still work. Reloading modules is primarily useful for testing during
+#' development, and should not be used in production code.
+#'
+#' \code{reload} does not work correctly with attached environments.
+#' @seealso \code{import}
+#' @seealso \code{unload}
+#' @export
+reload = function (module) {
+    stopifnot(inherits(module, 'module'))
+    module_ref = as.character(substitute(module))
+    module_path = module_path(module)
+    module_name = module_name(module)
+    rm(list = module_path, envir = .loaded_modules)
+    #' @TODO Once we have `attach`, need also to take care of the search path
+    #' and whatnot.
+    mod_ns = do_import(module_name, module_path)
+    module_parent = parent.frame()
+    mod_env = exhibit_namespace(mod_ns, module_ref, module_parent)
+    assign(module_ref, mod_env, envir = module_parent, inherits = TRUE)
+}

samples/R/scholar.Rd

@@ -0,0 +1,25 @@
+\docType{package}
+\name{scholar}
+\alias{scholar}
+\alias{scholar-package}
+\title{scholar}
+\source{
+  The package reads data from
+  \url{http://scholar.google.com}.  Dates and citation
+  counts are estimated and are determined automatically by
+  a computer program. Use at your own risk.
+}
+\description{
+  The \code{scholar} package provides functions to extract
+  citation data from Google Scholar.  There are also
+  convenience functions for comparing multiple scholars and
+  predicting h-index scores based on past publication
+  records.
+}
+\note{
+  A complementary set of Google Scholar functions can be
+  found at
+  \url{http://biostat.jhsph.edu/~jleek/code/googleCite.r}.
+  The \code{scholar} package was developed independently.
+}
+

samples/Red/example.red

@@ -0,0 +1,257 @@
+Red [
+    Title:  "Red console"
+    Author: ["Nenad Rakocevic" "Kaj de Vos"]
+    File:   %console.red
+    Tabs:   4
+    Rights: "Copyright (C) 2012-2013 Nenad Rakocevic. All rights reserved."
+    License: {
+        Distributed under the Boost Software License, Version 1.0.
+        See https://github.com/dockimbel/Red/blob/master/BSL-License.txt
+    }
+    Purpose:    "Just some code for testing Pygments colorizer"
+    Language:   http://www.red-lang.org/
+]
+
+#system-global [
+    #either OS = 'Windows [
+        #import [
+            "kernel32.dll" stdcall [
+                AttachConsole:   "AttachConsole" [
+                    processID       [integer!]
+                    return:         [integer!]
+                ]
+                SetConsoleTitle: "SetConsoleTitleA" [
+                    title           [c-string!]
+                    return:         [integer!]
+                ]
+                ReadConsole:     "ReadConsoleA" [
+                    consoleInput    [integer!]
+                    buffer          [byte-ptr!]
+                    charsToRead     [integer!]
+                    numberOfChars   [int-ptr!]
+                    inputControl    [int-ptr!]
+                    return:         [integer!]
+                ]
+            ]
+        ]
+        line-buffer-size: 16 * 1024
+        line-buffer: allocate line-buffer-size
+    ][
+        #switch OS [
+            MacOSX [
+                #define ReadLine-library "libreadline.dylib"
+            ]
+            #default [
+                #define ReadLine-library "libreadline.so.6"
+                #define History-library  "libhistory.so.6"
+            ]
+        ]
+        #import [
+            ReadLine-library cdecl [
+                read-line: "readline" [  ; Read a line from the console.
+                    prompt          [c-string!]
+                    return:         [c-string!]
+                ]
+                rl-bind-key: "rl_bind_key" [
+                    key             [integer!]
+                    command         [integer!]
+                    return:         [integer!]
+                ]
+                rl-insert:   "rl_insert" [
+                    count           [integer!]
+                    key             [integer!]
+                    return:         [integer!]
+                ]
+            ]
+            #if OS <> 'MacOSX [
+                History-library cdecl [
+                    add-history: "add_history" [  ; Add line to the history.
+                        line        [c-string!]
+                    ]
+                ]
+            ]
+        ]
+
+        rl-insert-wrapper: func [
+            [cdecl]
+            count   [integer!]
+            key     [integer!]
+            return: [integer!]
+        ][
+            rl-insert count key
+        ]
+        
+    ]
+]
+
+Windows?: system/platform = 'Windows
+
+read-argument: routine [
+    /local
+        args [str-array!]
+        str  [red-string!]
+][
+    if system/args-count <> 2 [
+        SET_RETURN(none-value)
+        exit
+    ]
+    args: system/args-list + 1                          ;-- skip binary filename
+    str: simple-io/read-txt args/item
+    SET_RETURN(str)
+]
+
+init-console: routine [
+    str [string!]
+    /local
+        ret
+][
+    #either OS = 'Windows [
+        ;ret: AttachConsole -1
+        ;if zero? ret [print-line "ReadConsole failed!" halt]
+        
+        ret: SetConsoleTitle as c-string! string/rs-head str
+        if zero? ret [print-line "SetConsoleTitle failed!" halt]
+    ][
+        rl-bind-key as-integer tab as-integer :rl-insert-wrapper
+    ]
+]
+
+input: routine [
+    prompt [string!]
+    /local
+        len ret str buffer line
+][
+    #either OS = 'Windows [
+        len: 0
+        print as c-string! string/rs-head prompt
+        ret: ReadConsole stdin line-buffer line-buffer-size :len null
+        if zero? ret [print-line "ReadConsole failed!" halt]
+        len: len + 1
+        line-buffer/len: null-byte
+        str: string/load as c-string! line-buffer len
+    ][
+        line: read-line as c-string! string/rs-head prompt
+        if line = null [halt]  ; EOF
+
+         #if OS <> 'MacOSX [add-history line]
+
+        str: string/load line  1 + length? line
+;       free as byte-ptr! line
+    ]
+    SET_RETURN(str)
+]
+
+count-delimiters: function [
+    buffer  [string!]
+    return: [block!]
+][
+    list: copy [0 0]
+    c: none
+    
+    foreach c buffer [
+        case [
+            escaped? [
+                escaped?: no
+            ]
+            in-comment? [
+                switch c [
+                    #"^/" [in-comment?: no]
+                ]
+            ]
+            'else [
+                switch c [
+                    #"^^" [escaped?: yes]
+                    #";"  [if zero? list/2 [in-comment?: yes]]
+                    #"["  [list/1: list/1 + 1]
+                    #"]"  [list/1: list/1 - 1]
+                    #"{"  [list/2: list/2 + 1]
+                    #"}"  [list/2: list/2 - 1]
+                ]
+            ]
+        ]
+    ]
+    list
+]
+
+do-console: function [][
+    buffer: make string! 10000
+    prompt: red-prompt: "red>> "
+    mode:  'mono
+    
+    switch-mode: [
+        mode: case [
+            cnt/1 > 0 ['block]
+            cnt/2 > 0 ['string]
+            'else     [
+                prompt: red-prompt
+                do eval
+                'mono
+            ]
+        ]
+        prompt: switch mode [
+            block  ["[^-"]
+            string ["{^-"]
+            mono   [red-prompt]
+        ]
+    ]
+    
+    eval: [
+        code: load/all buffer
+        
+        unless tail? code [
+            set/any 'result do code
+            
+            unless unset? :result [
+                if 67 = length? result: mold/part :result 67 [  ;-- optimized for width = 72
+                    clear back tail result
+                    append result "..."
+                ]
+                print ["==" result]
+            ]
+        ]
+        clear buffer
+    ]
+
+    while [true][
+        unless tail? line: input prompt [
+            append buffer line
+            cnt: count-delimiters buffer
+
+            either Windows? [
+                remove skip tail buffer -2          ;-- clear extra CR (Windows)
+            ][
+                append buffer lf                    ;-- Unix
+            ]
+            
+            switch mode [
+                block  [if cnt/1 <= 0 [do switch-mode]]
+                string [if cnt/2 <= 0 [do switch-mode]]
+                mono   [do either any [cnt/1 > 0 cnt/2 > 0][switch-mode][eval]]
+            ]
+        ]
+    ]
+]
+
+q: :quit
+
+if script: read-argument [
+    script: load script
+    either any [
+        script/1 <> 'Red
+        not block? script/2 
+    ][
+        print "*** Error: not a Red program!"
+    ][
+        do skip script 2
+    ]
+    quit
+]
+
+init-console "Red Console"
+
+print {
+-=== Red Console alpha version ===-
+(only ASCII input supported)
+}
+
+do-console