1 //========================================================================
5 // Mapping from character codes to Unicode.
7 // Copyright 2001-2003 Glyph & Cog, LLC
9 //========================================================================
11 #ifndef CHARCODETOUNICODE_H
12 #define CHARCODETOUNICODE_H
16 #ifdef USE_GCC_PRAGMAS
20 #include "CharTypes.h"
26 struct CharCodeToUnicodeString
;
28 //------------------------------------------------------------------------
30 class CharCodeToUnicode
{
33 // Read the CID-to-Unicode mapping for <collection> from the file
34 // specified by <fileName>. Sets the initial reference count to 1.
35 // Returns NULL on failure.
36 static CharCodeToUnicode
*parseCIDToUnicode(GString
*fileName
,
39 // Create a Unicode-to-Unicode mapping from the file specified by
40 // <fileName>. Sets the initial reference count to 1. Returns NULL
42 static CharCodeToUnicode
*parseUnicodeToUnicode(GString
*fileName
);
44 // Create the CharCode-to-Unicode mapping for an 8-bit font.
45 // <toUnicode> is an array of 256 Unicode indexes. Sets the initial
46 // reference count to 1.
47 static CharCodeToUnicode
*make8BitToUnicode(Unicode
*toUnicode
);
49 // Parse a ToUnicode CMap for an 8- or 16-bit font.
50 static CharCodeToUnicode
*parseCMap(GString
*buf
, int nBits
);
52 // Parse a ToUnicode CMap for an 8- or 16-bit font, merging it into
54 void mergeCMap(GString
*buf
, int nBits
);
61 // Return true if this mapping matches the specified <tagA>.
62 GBool
match(GString
*tagA
);
64 // Set the mapping for <c>.
65 void setMapping(CharCode c
, Unicode
*u
, int len
);
67 // Map a CharCode to Unicode.
68 int mapToUnicode(CharCode c
, Unicode
*u
, int size
);
70 // Return the mapping's length, i.e., one more than the max char
71 // code supported by the mapping.
72 CharCode
getLength() { return mapLen
; }
76 void parseCMap1(int (*getCharFunc
)(void *), void *data
, int nBits
);
77 void addMapping(CharCode code
, char *uStr
, int n
, int offset
);
78 CharCodeToUnicode(GString
*tagA
);
79 CharCodeToUnicode(GString
*tagA
, Unicode
*mapA
,
80 CharCode mapLenA
, GBool copyMap
,
81 CharCodeToUnicodeString
*sMapA
,
82 int sMapLenA
, int sMapSizeA
);
87 CharCodeToUnicodeString
*sMap
;
88 int sMapLen
, sMapSize
;
95 //------------------------------------------------------------------------
97 class CharCodeToUnicodeCache
{
100 CharCodeToUnicodeCache(int sizeA
);
101 ~CharCodeToUnicodeCache();
103 // Get the CharCodeToUnicode xObject for <tag>. Increments its
104 // reference count; there will be one reference for the cache plus
105 // one for the caller of this function. Returns NULL on failure.
106 CharCodeToUnicode
*getCharCodeToUnicode(GString
*tag
);
108 // Insert <ctu> into the cache, in the most-recently-used position.
109 void add(CharCodeToUnicode
*ctu
);
113 CharCodeToUnicode
**cache
;