pdftops/CMap.h

   1 //========================================================================
   2 //
   3 // CMap.h
   4 //
   5 // Copyright 2001-2003 Glyph & Cog, LLC
   6 //
   7 //========================================================================
   8
   9 #ifndef CMAP_H
  10 #define CMAP_H
  11
  12 #include <config.h>
  13
  14 #ifdef USE_GCC_PRAGMAS
  15 #pragma interface
  16 #endif
  17
  18 #include "gtypes.h"
  19 #include "CharTypes.h"
  20
  21 #if MULTITHREADED
  22 #include "GMutex.h"
  23 #endif
  24
  25 class GString;
  26 struct CMapVectorEntry;
  27 class CMapCache;
  28
  29 //------------------------------------------------------------------------
  30
  31 class CMap {
  32 public:
  33
  34   // Create the CMap specified by <collection> and <cMapName>.  Sets
  35   // the initial reference count to 1.  Returns NULL on failure.
  36   static CMap *parse(CMapCache *cache, GString *collectionA,
  37                      GString *cMapNameA);
  38
  39   ~CMap();
  40
  41   void incRefCnt();
  42   void decRefCnt();
  43
  44   // Return collection name (<registry>-<ordering>).
  45   GString *getCollection() { return collection; }
  46
  47   // Return true if this CMap matches the specified <collectionA>, and
  48   // <cMapNameA>.
  49   GBool match(GString *collectionA, GString *cMapNameA);
  50
  51   // Return the CID corresponding to the character code starting at
  52   // <s>, which contains <len> bytes.  Sets *<nUsed> to the number of
  53   // bytes used by the char code.
  54   CID getCID(char *s, int len, int *nUsed);
  55
  56   // Return the writing mode (0=horizontal, 1=vertical).
  57   int getWMode() { return wMode; }
  58
  59 private:
  60
  61   CMap(GString *collectionA, GString *cMapNameA);
  62   CMap(GString *collectionA, GString *cMapNameA, int wModeA);
  63   void useCMap(CMapCache *cache, char *useName);
  64   void copyVector(CMapVectorEntry *dest, CMapVectorEntry *src);
  65   void addCodeSpace(CMapVectorEntry *vec, Guint start, Guint end,
  66                     Guint nBytes);
  67   void addCIDs(Guint start, Guint end, Guint nBytes, CID firstCID);
  68   void freeCMapVector(CMapVectorEntry *vec);
  69
  70   GString *collection;
  71   GString *cMapName;
  72   int wMode;                    // writing mode (0=horizontal, 1=vertical)
  73   CMapVectorEntry *vector;      // vector for first byte (NULL for
  74                                 //   identity CMap)
  75   int refCnt;
  76 #if MULTITHREADED
  77   GMutex mutex;
  78 #endif
  79 };
  80
  81 //------------------------------------------------------------------------
  82
  83 #define cMapCacheSize 4
  84
  85 class CMapCache {
  86 public:
  87
  88   CMapCache();
  89   ~CMapCache();
  90
  91   // Get the <cMapName> CMap for the specified character collection.
  92   // Increments its reference count; there will be one reference for
  93   // the cache plus one for the caller of this function.  Returns NULL
  94   // on failure.
  95   CMap *getCMap(GString *collection, GString *cMapName);
  96
  97 private:
  98
  99   CMap *cache[cMapCacheSize];
 100 };
 101
 102 #endif