pdftops/Dict.h

   1 //========================================================================
   2 //
   3 // Dict.h
   4 //
   5 // Copyright 1996-2003 Glyph & Cog, LLC
   6 //
   7 //========================================================================
   8
   9 #ifndef DICT_H
  10 #define DICT_H
  11
  12 #include <config.h>
  13
  14 #ifdef USE_GCC_PRAGMAS
  15 #pragma interface
  16 #endif
  17
  18 #include "Object.h"
  19
  20 //------------------------------------------------------------------------
  21 // Dict
  22 //------------------------------------------------------------------------
  23
  24 struct DictEntry {
  25   char *key;
  26   Object val;
  27 };
  28
  29 class Dict {
  30 public:
  31
  32   // Constructor.
  33   Dict(XRef *xrefA);
  34
  35   // Destructor.
  36   ~Dict();
  37
  38   // Reference counting.
  39   int incRef() { return ++ref; }
  40   int decRef() { return --ref; }
  41
  42   // Get number of entries.
  43   int getLength() { return length; }
  44
  45   // Add an entry.  NB: does not copy key.
  46   void add(char *key, Object *val);
  47
  48   // Check if dictionary is of specified type.
  49   GBool is(char *type);
  50
  51   // Look up an entry and return the value.  Returns a null object
  52   // if <key> is not in the dictionary.
  53   Object *lookup(char *key, Object *obj);
  54   Object *lookupNF(char *key, Object *obj);
  55
  56   // Iterative accessors.
  57   char *getKey(int i);
  58   Object *getVal(int i, Object *obj);
  59   Object *getValNF(int i, Object *obj);
  60
  61   // Set the xref pointer.  This is only used in one special case: the
  62   // trailer dictionary, which is read before the xref table is
  63   // parsed.
  64   void setXRef(XRef *xrefA) { xref = xrefA; }
  65
  66 private:
  67
  68   XRef *xref;                   // the xref table for this PDF file
  69   DictEntry *entries;           // array of entries
  70   int size;                     // size of <entries> array
  71   int length;                   // number of entries in dictionary
  72   int ref;                      // reference count
  73
  74   DictEntry *find(char *key);
  75 };
  76
  77 #endif