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Diffstat (limited to 'Build/source/libs/xpdf/xpdf-3.02/xpdf/UnicodeMap.h')
-rw-r--r-- | Build/source/libs/xpdf/xpdf-3.02/xpdf/UnicodeMap.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/Build/source/libs/xpdf/xpdf-3.02/xpdf/UnicodeMap.h b/Build/source/libs/xpdf/xpdf-3.02/xpdf/UnicodeMap.h new file mode 100644 index 00000000000..0f86101e06c --- /dev/null +++ b/Build/source/libs/xpdf/xpdf-3.02/xpdf/UnicodeMap.h @@ -0,0 +1,123 @@ +//======================================================================== +// +// UnicodeMap.h +// +// Mapping from Unicode to an encoding. +// +// Copyright 2001-2003 Glyph & Cog, LLC +// +//======================================================================== + +#ifndef UNICODEMAP_H +#define UNICODEMAP_H + +#include <aconf.h> + +#ifdef USE_GCC_PRAGMAS +#pragma interface +#endif + +#include "gtypes.h" +#include "CharTypes.h" + +#if MULTITHREADED +#include "GMutex.h" +#endif + +class GString; + +//------------------------------------------------------------------------ + +enum UnicodeMapKind { + unicodeMapUser, // read from a file + unicodeMapResident, // static list of ranges + unicodeMapFunc // function pointer +}; + +typedef int (*UnicodeMapFunc)(Unicode u, char *buf, int bufSize); + +struct UnicodeMapRange { + Unicode start, end; // range of Unicode chars + Guint code, nBytes; // first output code +}; + +struct UnicodeMapExt; + +//------------------------------------------------------------------------ + +class UnicodeMap { +public: + + // Create the UnicodeMap specified by <encodingName>. Sets the + // initial reference count to 1. Returns NULL on failure. + static UnicodeMap *parse(GString *encodingNameA); + + // Create a resident UnicodeMap. + UnicodeMap(char *encodingNameA, GBool unicodeOutA, + UnicodeMapRange *rangesA, int lenA); + + // Create a resident UnicodeMap that uses a function instead of a + // list of ranges. + UnicodeMap(char *encodingNameA, GBool unicodeOutA, + UnicodeMapFunc funcA); + + ~UnicodeMap(); + + void incRefCnt(); + void decRefCnt(); + + GString *getEncodingName() { return encodingName; } + + GBool isUnicode() { return unicodeOut; } + + // Return true if this UnicodeMap matches the specified + // <encodingNameA>. + GBool match(GString *encodingNameA); + + // Map Unicode to the target encoding. Fills in <buf> with the + // output and returns the number of bytes used. Output will be + // truncated at <bufSize> bytes. No string terminator is written. + // Returns 0 if no mapping is found. + int mapUnicode(Unicode u, char *buf, int bufSize); + +private: + + UnicodeMap(GString *encodingNameA); + + GString *encodingName; + UnicodeMapKind kind; + GBool unicodeOut; + union { + UnicodeMapRange *ranges; // (user, resident) + UnicodeMapFunc func; // (func) + }; + int len; // (user, resident) + UnicodeMapExt *eMaps; // (user) + int eMapsLen; // (user) + int refCnt; +#if MULTITHREADED + GMutex mutex; +#endif +}; + +//------------------------------------------------------------------------ + +#define unicodeMapCacheSize 4 + +class UnicodeMapCache { +public: + + UnicodeMapCache(); + ~UnicodeMapCache(); + + // Get the UnicodeMap for <encodingName>. Increments its reference + // count; there will be one reference for the cache plus one for the + // caller of this function. Returns NULL on failure. + UnicodeMap *getUnicodeMap(GString *encodingName); + +private: + + UnicodeMap *cache[unicodeMapCacheSize]; +}; + +#endif |