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//========================================================================
//
// CharCodeToUnicode.h
//
// Mapping from character codes to Unicode.
//
// Copyright 2001-2003 Glyph & Cog, LLC
//
//========================================================================
#ifndef CHARCODETOUNICODE_H
#define CHARCODETOUNICODE_H
#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
#include "poppler-config.h"
#include "CharTypes.h"
#if MULTITHREADED
#include <goo/GooMutex.h>
#endif
struct CharCodeToUnicodeString;
//------------------------------------------------------------------------
class CharCodeToUnicode {
public:
// Read the CID-to-Unicode mapping for <collection> from the file
// specified by <fileName>. Sets the initial reference count to 1.
// Returns NULL on failure.
static CharCodeToUnicode *parseCIDToUnicode(GooString *fileName,
GooString *collection);
// Create a Unicode-to-Unicode mapping from the file specified by
// <fileName>. Sets the initial reference count to 1. Returns NULL
// on failure.
static CharCodeToUnicode *parseUnicodeToUnicode(GooString *fileName);
// Create the CharCode-to-Unicode mapping for an 8-bit font.
// <toUnicode> is an array of 256 Unicode indexes. Sets the initial
// reference count to 1.
static CharCodeToUnicode *make8BitToUnicode(Unicode *toUnicode);
// Parse a ToUnicode CMap for an 8- or 16-bit font.
static CharCodeToUnicode *parseCMap(GooString *buf, int nBits);
// Parse a ToUnicode CMap for an 8- or 16-bit font, merging it into
// <this>.
void mergeCMap(GooString *buf, int nBits);
~CharCodeToUnicode();
void incRefCnt();
void decRefCnt();
// Return true if this mapping matches the specified <tagA>.
GBool match(GooString *tagA);
// Set the mapping for <c>.
void setMapping(CharCode c, Unicode *u, int len);
// Map a CharCode to Unicode.
int mapToUnicode(CharCode c, Unicode *u, int size);
// Return the mapping's length, i.e., one more than the max char
// code supported by the mapping.
CharCode getLength() { return mapLen; }
private:
void parseCMap1(int (*getCharFunc)(void *), void *data, int nBits);
void addMapping(CharCode code, char *uStr, int n, int offset);
CharCodeToUnicode(GooString *tagA);
CharCodeToUnicode(GooString *tagA, Unicode *mapA,
CharCode mapLenA, GBool copyMap,
CharCodeToUnicodeString *sMapA,
int sMapLenA, int sMapSizeA);
GooString *tag;
Unicode *map;
CharCode mapLen;
CharCodeToUnicodeString *sMap;
int sMapLen, sMapSize;
int refCnt;
#if MULTITHREADED
GooMutex mutex;
#endif
};
//------------------------------------------------------------------------
class CharCodeToUnicodeCache {
public:
CharCodeToUnicodeCache(int sizeA);
~CharCodeToUnicodeCache();
// Get the CharCodeToUnicode object for <tag>. Increments its
// reference count; there will be one reference for the cache plus
// one for the caller of this function. Returns NULL on failure.
CharCodeToUnicode *getCharCodeToUnicode(GooString *tag);
// Insert <ctu> into the cache, in the most-recently-used position.
void add(CharCodeToUnicode *ctu);
private:
CharCodeToUnicode **cache;
int size;
};
#endif
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