CMap.h

//========================================================================
//
// CMap.h
//
// Copyright 2001-2002 Glyph & Cog, LLC
//
//========================================================================
 
#ifndef CMAP_H
#define CMAP_H
 
#include <aconf.h>
 
#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
 
#include "gtypes.h"
#include "CharTypes.h"
 
class GString;
struct CMapVectorEntry;
class CMapCache;
 
//------------------------------------------------------------------------
 
class CMap {
public:
 
  // Create the CMap specified by <collection> and <cMapName>.  Sets
  // the initial reference count to 1.  Returns NULL on failure.
  static CMap *parse(CMapCache *cache, GString *collectionA,
             GString *cMapNameA);
 
  ~CMap();
 
  void incRefCnt();
  void decRefCnt();
 
  // Return collection name (<registry>-<ordering>).
  GString *getCollection() { return collection; }
 
  // Return true if this CMap matches the specified <collectionA>, and
  // <cMapNameA>.
  GBool match(GString *collectionA, GString *cMapNameA);
 
  // Return the CID corresponding to the character code starting at
  // <s>, which contains <len> bytes.  Sets *<nUsed> to the number of
  // bytes used by the char code.
  CID getCID(char *s, int len, int *nUsed);
 
  // Return the writing mode (0=horizontal, 1=vertical).
  int getWMode() { return wMode; }
 
private:
 
  CMap(GString *collectionA, GString *cMapNameA);
  CMap(GString *collectionA, GString *cMapNameA, int wModeA);
  void useCMap(CMapCache *cache, char *useName);
  void copyVector(CMapVectorEntry *dest, CMapVectorEntry *src);
  void addCodeSpace(CMapVectorEntry *vec, Guint start, Guint end,
            Guint nBytes);
  void addCIDs(Guint start, Guint end, Guint nBytes, CID firstCID);
  void freeCMapVector(CMapVectorEntry *vec);
 
  GString *collection;
  GString *cMapName;
  int wMode;            // writing mode (0=horizontal, 1=vertical)
  CMapVectorEntry *vector;  // vector for first byte (NULL for
                //   identity CMap)
  int refCnt;
};
 
//------------------------------------------------------------------------
 
#define cMapCacheSize 4
 
class CMapCache {
public:
 
  CMapCache();
  ~CMapCache();
 
  // Get the <cMapName> CMap for the specified character collection.
  // Increments its reference count; there will be one reference for
  // the cache plus one for the caller of this function.  Returns NULL
  // on failure.
  CMap *getCMap(GString *collection, GString *cMapName);
 
private:
 
  CMap *cache[cMapCacheSize];
};
 
#endif