1 //========================================================================
5 // Mapping from Unicode to an encoding.
7 // Copyright 2001-2003 Glyph & Cog, LLC
9 //========================================================================
16 #ifdef USE_GCC_PRAGMAS
21 #include "CharTypes.h"
29 //------------------------------------------------------------------------
32 unicodeMapUser, // read from a file
33 unicodeMapResident, // static list of ranges
34 unicodeMapFunc // function pointer
37 typedef int (*UnicodeMapFunc)(Unicode u, char *buf, int bufSize);
39 struct UnicodeMapRange {
40 Unicode start, end; // range of Unicode chars
41 Guint code, nBytes; // first output code
46 //------------------------------------------------------------------------
51 // Create the UnicodeMap specified by <encodingName>. Sets the
52 // initial reference count to 1. Returns NULL on failure.
53 static UnicodeMap *parse(GString *encodingNameA);
55 // Create a resident UnicodeMap.
56 UnicodeMap(char *encodingNameA, GBool unicodeOutA,
57 UnicodeMapRange *rangesA, int lenA);
59 // Create a resident UnicodeMap that uses a function instead of a
61 UnicodeMap(char *encodingNameA, GBool unicodeOutA,
62 UnicodeMapFunc funcA);
69 GString *getEncodingName() { return encodingName; }
71 GBool isUnicode() { return unicodeOut; }
73 // Return true if this UnicodeMap matches the specified
75 GBool match(GString *encodingNameA);
77 // Map Unicode to the target encoding. Fills in <buf> with the
78 // output and returns the number of bytes used. Output will be
79 // truncated at <bufSize> bytes. No string terminator is written.
80 // Returns 0 if no mapping is found.
81 int mapUnicode(Unicode u, char *buf, int bufSize);
85 UnicodeMap(GString *encodingNameA);
87 GString *encodingName;
91 UnicodeMapRange *ranges; // (user, resident)
92 UnicodeMapFunc func; // (func)
94 int len; // (user, resident)
95 UnicodeMapExt *eMaps; // (user)
96 int eMapsLen; // (user)
103 //------------------------------------------------------------------------
105 #define unicodeMapCacheSize 4
107 class UnicodeMapCache {
113 // Get the UnicodeMap for <encodingName>. Increments its reference
114 // count; there will be one reference for the cache plus one for the
115 // caller of this function. Returns NULL on failure.
116 UnicodeMap *getUnicodeMap(GString *encodingName);
120 UnicodeMap *cache[unicodeMapCacheSize];