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zend_ini_scanner.l by Zend Technologies; New BSD license. common.l by Toshihiro MATSUI, Electrotechnical Laboratory; New BSD license. create_view.l by PostgreSQL Global Development Group; MIT license.
602 lines
16 KiB
Plaintext
602 lines
16 KiB
Plaintext
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2012 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Zeev Suraski <zeev@zend.com> |
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| Jani Taskinen <jani@php.net> |
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| Marcus Boerger <helly@php.net> |
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| Nuno Lopes <nlopess@php.net> |
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| Scott MacVicar <scottmac@php.net> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include <errno.h>
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#include "zend.h"
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#include "zend_globals.h"
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#include <zend_ini_parser.h>
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#include "zend_ini_scanner.h"
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#if 0
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# define YYDEBUG(s, c) printf("state: %d char: %c\n", s, c)
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#else
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# define YYDEBUG(s, c)
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#endif
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#include "zend_ini_scanner_defs.h"
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#define YYCTYPE unsigned char
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/* allow the scanner to read one null byte after the end of the string (from ZEND_MMAP_AHEAD)
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* so that if will be able to terminate to match the current token (e.g. non-enclosed string) */
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#define YYFILL(n) { if (YYCURSOR > YYLIMIT) return 0; }
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#define YYCURSOR SCNG(yy_cursor)
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#define YYLIMIT SCNG(yy_limit)
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#define YYMARKER SCNG(yy_marker)
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#define YYGETCONDITION() SCNG(yy_state)
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#define YYSETCONDITION(s) SCNG(yy_state) = s
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#define STATE(name) yyc##name
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/* emulate flex constructs */
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#define BEGIN(state) YYSETCONDITION(STATE(state))
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#define YYSTATE YYGETCONDITION()
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#define yytext ((char*)SCNG(yy_text))
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#define yyleng SCNG(yy_leng)
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#define yyless(x) do { YYCURSOR = (unsigned char*)yytext + x; \
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yyleng = (unsigned int)x; } while(0)
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/* #define yymore() goto yymore_restart */
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/* perform sanity check. If this message is triggered you should
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increase the ZEND_MMAP_AHEAD value in the zend_streams.h file */
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/*!max:re2c */
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#if ZEND_MMAP_AHEAD < (YYMAXFILL + 1)
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# error ZEND_MMAP_AHEAD should be greater than YYMAXFILL
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#endif
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/* How it works (for the core ini directives):
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* ===========================================
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*
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* 1. Scanner scans file for tokens and passes them to parser.
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* 2. Parser parses the tokens and passes the name/value pairs to the callback
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* function which stores them in the configuration hash table.
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* 3. Later REGISTER_INI_ENTRIES() is called which triggers the actual
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* registering of ini entries and uses zend_get_configuration_directive()
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* to fetch the previously stored name/value pair from configuration hash table
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* and registers the static ini entries which match the name to the value
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* into EG(ini_directives) hash table.
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* 4. PATH section entries are used per-request from down to top, each overriding
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* previous if one exists. zend_alter_ini_entry() is called for each entry.
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* Settings in PATH section are ZEND_INI_SYSTEM accessible and thus mimics the
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* php_admin_* directives used within Apache httpd.conf when PHP is compiled as
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* module for Apache.
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* 5. User defined ini files (like .htaccess for apache) are parsed for each request and
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* stored in separate hash defined by SAPI.
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*/
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/* TODO: (ordered by importance :-)
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* ===============================================================================
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*
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* - Separate constant lookup totally from plain strings (using CONSTANT pattern)
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* - Add #if .. #else .. #endif and ==, !=, <, > , <=, >= operators
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* - Add #include "some.ini"
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* - Allow variables to refer to options also when using parse_ini_file()
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*
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*/
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/* Globals Macros */
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#define SCNG INI_SCNG
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#ifdef ZTS
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ZEND_API ts_rsrc_id ini_scanner_globals_id;
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#else
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ZEND_API zend_ini_scanner_globals ini_scanner_globals;
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#endif
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/* Eat leading whitespace */
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#define EAT_LEADING_WHITESPACE() \
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while (yytext[0]) { \
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if (yytext[0] == ' ' || yytext[0] == '\t') { \
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SCNG(yy_text)++; \
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yyleng--; \
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} else { \
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break; \
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} \
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}
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/* Eat trailing whitespace + extra char */
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#define EAT_TRAILING_WHITESPACE_EX(ch) \
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while (yyleng > 0 && ( \
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(ch != 'X' && yytext[yyleng - 1] == ch) || \
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yytext[yyleng - 1] == '\n' || \
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yytext[yyleng - 1] == '\r' || \
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yytext[yyleng - 1] == '\t' || \
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yytext[yyleng - 1] == ' ') \
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) { \
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yyleng--; \
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}
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/* Eat trailing whitespace */
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#define EAT_TRAILING_WHITESPACE() EAT_TRAILING_WHITESPACE_EX('X')
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#define zend_ini_copy_value(retval, str, len) { \
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Z_STRVAL_P(retval) = zend_strndup(str, len); \
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Z_STRLEN_P(retval) = len; \
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Z_TYPE_P(retval) = IS_STRING; \
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}
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#define RETURN_TOKEN(type, str, len) { \
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zend_ini_copy_value(ini_lval, str, len); \
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return type; \
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}
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static void _yy_push_state(int new_state TSRMLS_DC)
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{
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zend_stack_push(&SCNG(state_stack), (void *) &YYGETCONDITION(), sizeof(int));
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YYSETCONDITION(new_state);
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}
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#define yy_push_state(state_and_tsrm) _yy_push_state(yyc##state_and_tsrm)
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static void yy_pop_state(TSRMLS_D)
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{
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int *stack_state;
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zend_stack_top(&SCNG(state_stack), (void **) &stack_state);
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YYSETCONDITION(*stack_state);
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zend_stack_del_top(&SCNG(state_stack));
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}
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static void yy_scan_buffer(char *str, unsigned int len TSRMLS_DC)
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{
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YYCURSOR = (YYCTYPE*)str;
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SCNG(yy_start) = YYCURSOR;
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YYLIMIT = YYCURSOR + len;
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}
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#define ini_filename SCNG(filename)
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/* {{{ init_ini_scanner()
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*/
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static int init_ini_scanner(int scanner_mode, zend_file_handle *fh TSRMLS_DC)
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{
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/* Sanity check */
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if (scanner_mode != ZEND_INI_SCANNER_NORMAL && scanner_mode != ZEND_INI_SCANNER_RAW) {
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zend_error(E_WARNING, "Invalid scanner mode");
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return FAILURE;
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}
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SCNG(lineno) = 1;
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SCNG(scanner_mode) = scanner_mode;
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SCNG(yy_in) = fh;
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if (fh != NULL) {
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ini_filename = zend_strndup(fh->filename, strlen(fh->filename));
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} else {
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ini_filename = NULL;
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}
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zend_stack_init(&SCNG(state_stack));
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BEGIN(INITIAL);
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return SUCCESS;
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}
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/* }}} */
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/* {{{ shutdown_ini_scanner()
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*/
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void shutdown_ini_scanner(TSRMLS_D)
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{
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zend_stack_destroy(&SCNG(state_stack));
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if (ini_filename) {
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free(ini_filename);
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}
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}
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/* }}} */
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/* {{{ zend_ini_scanner_get_lineno()
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*/
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int zend_ini_scanner_get_lineno(TSRMLS_D)
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{
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return SCNG(lineno);
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}
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/* }}} */
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/* {{{ zend_ini_scanner_get_filename()
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*/
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char *zend_ini_scanner_get_filename(TSRMLS_D)
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{
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return ini_filename ? ini_filename : "Unknown";
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}
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/* }}} */
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/* {{{ zend_ini_open_file_for_scanning()
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*/
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int zend_ini_open_file_for_scanning(zend_file_handle *fh, int scanner_mode TSRMLS_DC)
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{
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char *buf;
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size_t size;
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if (zend_stream_fixup(fh, &buf, &size TSRMLS_CC) == FAILURE) {
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return FAILURE;
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}
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if (init_ini_scanner(scanner_mode, fh TSRMLS_CC) == FAILURE) {
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zend_file_handle_dtor(fh TSRMLS_CC);
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return FAILURE;
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}
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yy_scan_buffer(buf, size TSRMLS_CC);
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return SUCCESS;
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}
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/* }}} */
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/* {{{ zend_ini_prepare_string_for_scanning()
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*/
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int zend_ini_prepare_string_for_scanning(char *str, int scanner_mode TSRMLS_DC)
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{
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int len = strlen(str);
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if (init_ini_scanner(scanner_mode, NULL TSRMLS_CC) == FAILURE) {
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return FAILURE;
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}
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yy_scan_buffer(str, len TSRMLS_CC);
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return SUCCESS;
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}
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/* }}} */
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/* {{{ zend_ini_escape_string()
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*/
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static void zend_ini_escape_string(zval *lval, char *str, int len, char quote_type TSRMLS_DC)
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{
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register char *s, *t;
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char *end;
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zend_ini_copy_value(lval, str, len);
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/* convert escape sequences */
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s = t = Z_STRVAL_P(lval);
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end = s + Z_STRLEN_P(lval);
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while (s < end) {
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if (*s == '\\') {
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s++;
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if (s >= end) {
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*t++ = '\\';
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continue;
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}
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switch (*s) {
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case '"':
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if (*s != quote_type) {
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*t++ = '\\';
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*t++ = *s;
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break;
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}
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case '\\':
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case '$':
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*t++ = *s;
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Z_STRLEN_P(lval)--;
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break;
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default:
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*t++ = '\\';
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*t++ = *s;
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break;
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}
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} else {
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*t++ = *s;
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}
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if (*s == '\n' || (*s == '\r' && (*(s+1) != '\n'))) {
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SCNG(lineno)++;
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}
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s++;
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}
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*t = 0;
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}
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/* }}} */
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int ini_lex(zval *ini_lval TSRMLS_DC)
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{
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restart:
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SCNG(yy_text) = YYCURSOR;
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/* yymore_restart: */
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/* detect EOF */
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if (YYCURSOR >= YYLIMIT) {
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if (YYSTATE == STATE(ST_VALUE) || YYSTATE == STATE(ST_RAW)) {
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BEGIN(INITIAL);
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return END_OF_LINE;
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}
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return 0;
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}
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/* Eat any UTF-8 BOM we find in the first 3 bytes */
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if (YYCURSOR == SCNG(yy_start) && YYCURSOR + 3 < YYLIMIT) {
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if (memcmp(YYCURSOR, "\xef\xbb\xbf", 3) == 0) {
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YYCURSOR += 3;
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goto restart;
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}
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}
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/*!re2c
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re2c:yyfill:check = 0;
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LNUM [0-9]+
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DNUM ([0-9]*[\.][0-9]+)|([0-9]+[\.][0-9]*)
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NUMBER [-]?{LNUM}|{DNUM}
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ANY_CHAR (.|[\n\t])
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NEWLINE ("\r"|"\n"|"\r\n")
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TABS_AND_SPACES [ \t]
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WHITESPACE [ \t]+
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CONSTANT [a-zA-Z_][a-zA-Z0-9_]*
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LABEL [^=\n\r\t;|&$~(){}!"\[]+
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TOKENS [:,.\[\]"'()|^&+-/*=%$!~<>?@{}]
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OPERATORS [&|~()!]
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DOLLAR_CURLY "${"
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SECTION_RAW_CHARS [^\]\n\r]
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SINGLE_QUOTED_CHARS [^']
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RAW_VALUE_CHARS [^"\n\r;\000]
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LITERAL_DOLLAR ("$"([^{\000]|("\\"{ANY_CHAR})))
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VALUE_CHARS ([^$= \t\n\r;&|~()!"'\000]|{LITERAL_DOLLAR})
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SECTION_VALUE_CHARS ([^$\n\r;"'\]\\]|("\\"{ANY_CHAR})|{LITERAL_DOLLAR})
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<!*> := yyleng = YYCURSOR - SCNG(yy_text);
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<INITIAL>"[" { /* Section start */
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/* Enter section data lookup state */
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if (SCNG(scanner_mode) == ZEND_INI_SCANNER_RAW) {
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yy_push_state(ST_SECTION_RAW TSRMLS_CC);
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} else {
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yy_push_state(ST_SECTION_VALUE TSRMLS_CC);
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}
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return TC_SECTION;
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}
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<ST_VALUE,ST_SECTION_VALUE,ST_OFFSET>"'"{SINGLE_QUOTED_CHARS}+"'" { /* Raw string */
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/* Eat leading and trailing single quotes */
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if (yytext[0] == '\'' && yytext[yyleng - 1] == '\'') {
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SCNG(yy_text)++;
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yyleng = yyleng - 2;
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}
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RETURN_TOKEN(TC_RAW, yytext, yyleng);
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}
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<ST_SECTION_RAW,ST_SECTION_VALUE>"]"{TABS_AND_SPACES}*{NEWLINE}? { /* End of section */
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BEGIN(INITIAL);
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SCNG(lineno)++;
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return ']';
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}
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<INITIAL>{LABEL}"["{TABS_AND_SPACES}* { /* Start of option with offset */
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/* Eat leading whitespace */
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EAT_LEADING_WHITESPACE();
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/* Eat trailing whitespace and [ */
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EAT_TRAILING_WHITESPACE_EX('[');
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/* Enter offset lookup state */
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yy_push_state(ST_OFFSET TSRMLS_CC);
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RETURN_TOKEN(TC_OFFSET, yytext, yyleng);
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}
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<ST_OFFSET>{TABS_AND_SPACES}*"]" { /* End of section or an option offset */
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BEGIN(INITIAL);
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return ']';
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}
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<ST_DOUBLE_QUOTES,ST_SECTION_VALUE,ST_VALUE,ST_OFFSET>{DOLLAR_CURLY} { /* Variable start */
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yy_push_state(ST_VARNAME TSRMLS_CC);
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return TC_DOLLAR_CURLY;
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}
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<ST_VARNAME>{LABEL} { /* Variable name */
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/* Eat leading whitespace */
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EAT_LEADING_WHITESPACE();
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/* Eat trailing whitespace */
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EAT_TRAILING_WHITESPACE();
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RETURN_TOKEN(TC_VARNAME, yytext, yyleng);
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}
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<ST_VARNAME>"}" { /* Variable end */
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yy_pop_state(TSRMLS_C);
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return '}';
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}
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<INITIAL,ST_VALUE>("true"|"on"|"yes"){TABS_AND_SPACES}* { /* TRUE value (when used outside option value/offset this causes parse error!) */
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RETURN_TOKEN(BOOL_TRUE, "1", 1);
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}
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<INITIAL,ST_VALUE>("false"|"off"|"no"|"none"|"null"){TABS_AND_SPACES}* { /* FALSE value (when used outside option value/offset this causes parse error!)*/
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RETURN_TOKEN(BOOL_FALSE, "", 0);
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}
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<INITIAL>{LABEL} { /* Get option name */
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/* Eat leading whitespace */
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EAT_LEADING_WHITESPACE();
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/* Eat trailing whitespace */
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EAT_TRAILING_WHITESPACE();
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RETURN_TOKEN(TC_LABEL, yytext, yyleng);
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}
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<INITIAL>{TABS_AND_SPACES}*[=]{TABS_AND_SPACES}* { /* Start option value */
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if (SCNG(scanner_mode) == ZEND_INI_SCANNER_RAW) {
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yy_push_state(ST_RAW TSRMLS_CC);
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} else {
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yy_push_state(ST_VALUE TSRMLS_CC);
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}
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return '=';
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}
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<ST_RAW>["] {
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while (YYCURSOR < YYLIMIT) {
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switch (*YYCURSOR++) {
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case '\n':
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SCNG(lineno)++;
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break;
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case '\r':
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if (*YYCURSOR != '\n') {
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SCNG(lineno)++;
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}
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break;
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case '"':
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yyleng = YYCURSOR - SCNG(yy_text) - 2;
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SCNG(yy_text)++;
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RETURN_TOKEN(TC_RAW, yytext, yyleng);
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case '\\':
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if (YYCURSOR < YYLIMIT) {
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YYCURSOR++;
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}
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break;
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}
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}
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yyleng = YYCURSOR - SCNG(yy_text);
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RETURN_TOKEN(TC_RAW, yytext, yyleng);
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}
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<ST_RAW>{RAW_VALUE_CHARS}+ { /* Raw value, only used when SCNG(scanner_mode) == ZEND_INI_SCANNER_RAW. */
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RETURN_TOKEN(TC_RAW, yytext, yyleng);
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}
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<ST_SECTION_RAW>{SECTION_RAW_CHARS}+ { /* Raw value, only used when SCNG(scanner_mode) == ZEND_INI_SCANNER_RAW. */
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RETURN_TOKEN(TC_RAW, yytext, yyleng);
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}
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<ST_VALUE,ST_RAW>{TABS_AND_SPACES}*{NEWLINE} { /* End of option value */
|
|
BEGIN(INITIAL);
|
|
SCNG(lineno)++;
|
|
return END_OF_LINE;
|
|
}
|
|
|
|
<ST_SECTION_VALUE,ST_VALUE,ST_OFFSET>{CONSTANT} { /* Get constant option value */
|
|
RETURN_TOKEN(TC_CONSTANT, yytext, yyleng);
|
|
}
|
|
|
|
<ST_SECTION_VALUE,ST_VALUE,ST_OFFSET>{NUMBER} { /* Get number option value as string */
|
|
RETURN_TOKEN(TC_NUMBER, yytext, yyleng);
|
|
}
|
|
|
|
<INITIAL>{TOKENS} { /* Disallow these chars outside option values */
|
|
return yytext[0];
|
|
}
|
|
|
|
<ST_VALUE>{OPERATORS}{TABS_AND_SPACES}* { /* Boolean operators */
|
|
return yytext[0];
|
|
}
|
|
|
|
<ST_VALUE>[=] { /* Make = used in option value to trigger error */
|
|
yyless(0);
|
|
BEGIN(INITIAL);
|
|
return END_OF_LINE;
|
|
}
|
|
|
|
<ST_VALUE>{VALUE_CHARS}+ { /* Get everything else as option/offset value */
|
|
RETURN_TOKEN(TC_STRING, yytext, yyleng);
|
|
}
|
|
|
|
<ST_SECTION_VALUE,ST_OFFSET>{SECTION_VALUE_CHARS}+ { /* Get rest as section/offset value */
|
|
RETURN_TOKEN(TC_STRING, yytext, yyleng);
|
|
}
|
|
|
|
<ST_SECTION_VALUE,ST_VALUE,ST_OFFSET>{TABS_AND_SPACES}*["] { /* Double quoted '"' string start */
|
|
yy_push_state(ST_DOUBLE_QUOTES TSRMLS_CC);
|
|
return '"';
|
|
}
|
|
|
|
<ST_DOUBLE_QUOTES>["]{TABS_AND_SPACES}* { /* Double quoted '"' string ends */
|
|
yy_pop_state(TSRMLS_C);
|
|
return '"';
|
|
}
|
|
|
|
<ST_DOUBLE_QUOTES>[^] { /* Escape double quoted string contents */
|
|
if (YYCURSOR > YYLIMIT) {
|
|
return 0;
|
|
}
|
|
|
|
while (YYCURSOR < YYLIMIT) {
|
|
switch (*YYCURSOR++) {
|
|
case '"':
|
|
if (YYCURSOR < YYLIMIT && YYCURSOR[-2] == '\\' && *YYCURSOR != '\r' && *YYCURSOR != '\n') {
|
|
continue;
|
|
}
|
|
break;
|
|
case '$':
|
|
if (*YYCURSOR == '{') {
|
|
break;
|
|
}
|
|
continue;
|
|
case '\\':
|
|
if (YYCURSOR < YYLIMIT && *YYCURSOR != '"') {
|
|
YYCURSOR++;
|
|
}
|
|
/* fall through */
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
YYCURSOR--;
|
|
break;
|
|
}
|
|
|
|
yyleng = YYCURSOR - SCNG(yy_text);
|
|
|
|
zend_ini_escape_string(ini_lval, yytext, yyleng, '"' TSRMLS_CC);
|
|
return TC_QUOTED_STRING;
|
|
}
|
|
|
|
<ST_SECTION_VALUE,ST_VALUE,ST_OFFSET>{WHITESPACE} {
|
|
RETURN_TOKEN(TC_WHITESPACE, yytext, yyleng);
|
|
}
|
|
|
|
<INITIAL,ST_RAW>{TABS_AND_SPACES}+ {
|
|
/* eat whitespace */
|
|
goto restart;
|
|
}
|
|
|
|
<INITIAL>{TABS_AND_SPACES}*{NEWLINE} {
|
|
SCNG(lineno)++;
|
|
return END_OF_LINE;
|
|
}
|
|
|
|
<INITIAL,ST_VALUE,ST_RAW>{TABS_AND_SPACES}*[;][^\r\n]*{NEWLINE} { /* Comment */
|
|
BEGIN(INITIAL);
|
|
SCNG(lineno)++;
|
|
return END_OF_LINE;
|
|
}
|
|
|
|
<INITIAL>{TABS_AND_SPACES}*[#][^\r\n]*{NEWLINE} { /* #Comment */
|
|
zend_error(E_DEPRECATED, "Comments starting with '#' are deprecated in %s on line %d", zend_ini_scanner_get_filename(TSRMLS_C), SCNG(lineno));
|
|
BEGIN(INITIAL);
|
|
SCNG(lineno)++;
|
|
return END_OF_LINE;
|
|
}
|
|
|
|
<ST_VALUE,ST_RAW>[^] { /* End of option value (if EOF is reached before EOL */
|
|
BEGIN(INITIAL);
|
|
return END_OF_LINE;
|
|
}
|
|
|
|
<*>[^] {
|
|
return 0;
|
|
}
|
|
|
|
*/
|
|
}
|