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"
25 //------------------------------------------------------------------------
28 unicodeMapUser, // read from a file
29 unicodeMapResident, // static list of ranges
30 unicodeMapFunc // function pointer
33 typedef int (*UnicodeMapFunc)(Unicode u, char *buf, int bufSize);
35 struct UnicodeMapRange {
36 Unicode start, end; // range of Unicode chars
37 Guint code, nBytes; // first output code
42 //------------------------------------------------------------------------
47 // Create the UnicodeMap specified by <encodingName>. Sets the
48 // initial reference count to 1. Returns NULL on failure.
49 static UnicodeMap *parse(GString *encodingNameA);
51 // Create a resident UnicodeMap.
52 UnicodeMap(char *encodingNameA, GBool unicodeOutA,
53 UnicodeMapRange *rangesA, int lenA);
55 // Create a resident UnicodeMap that uses a function instead of a
57 UnicodeMap(char *encodingNameA, GBool unicodeOutA,
58 UnicodeMapFunc funcA);
65 GString *getEncodingName() { return encodingName; }
67 GBool isUnicode() { return unicodeOut; }
69 // Return true if this UnicodeMap matches the specified
71 GBool match(GString *encodingNameA);
73 // Map Unicode to the target encoding. Fills in <buf> with the
74 // output and returns the number of bytes used. Output will be
75 // truncated at <bufSize> bytes. No string terminator is written.
76 // Returns 0 if no mapping is found.
77 int mapUnicode(Unicode u, char *buf, int bufSize);
81 UnicodeMap(GString *encodingNameA);
83 GString *encodingName;
87 UnicodeMapRange *ranges; // (user, resident)
88 UnicodeMapFunc func; // (func)
90 int len; // (user, resident)
91 UnicodeMapExt *eMaps; // (user)
92 int eMapsLen; // (user)
96 //------------------------------------------------------------------------
98 #define unicodeMapCacheSize 4
100 class UnicodeMapCache {
106 // Get the UnicodeMap for <encodingName>. Increments its reference
107 // count; there will be one reference for the cache plus one for the
108 // caller of this function. Returns NULL on failure.
109 UnicodeMap *getUnicodeMap(GString *encodingName);
113 UnicodeMap *cache[unicodeMapCacheSize];