xBase: add .ch extension + sample

lib/linguist/languages.yml

@@ -3783,5 +3783,6 @@ xBase:
   color: "#403a40"
   extensions:
   - .prg
+  - .ch
   tm_scope: none
   ace_mode: text

samples/xBase/sample.ch

@@ -0,0 +1,30 @@
+#ifndef __HARBOUR__
+   #ifndef __XPP__
+      #ifndef __CLIP__
+         #ifndef FlagShip
+            #define __CLIPPER__
+         #endif
+      #endif
+   #endif
+#endif
+
+/* File create flags */
+#define FC_NORMAL          0  /* No file attributes are set */
+#define FC_READONLY        1
+#define FC_HIDDEN          2
+#define FC_SYSTEM          4
+
+// New-style comment
+#command SET DELETED <x:ON,OFF,&>      => Set( _SET_DELETED, <(x)> )
+#command SET DELETED (<x>)             => Set( _SET_DELETED, <x> )
+#command @ <row>, <col> SAY <exp> [PICTURE <pic>] [COLOR <clr>] => ;
+         DevPos( <row>, <col> ) ; DevOutPict( <exp>, <pic> [, <clr>] )
+         
+#command ENDIF <*x*> => endif
+
+#ifdef __CLIPPER__   
+   #xtranslate hb_MemoWrit( [<x,...>] )  => MemoWrit( <x> )
+   #xtranslate hb_dbExists( <t> )        => File( <t> )
+   #xtranslate hb_dbPack()               => __dbPack()
+   #xtranslate hb_default( @<v>, <x> )   => iif( StrTran( ValType( <v> ), "M", "C" ) == StrTran( ValType( <x> ), "M", "C" ),, <v> := <x>, )
+#endif