Dict.h

//========================================================================
//
// Dict.h
//
// Copyright 1996-2002 Glyph & Cog, LLC
//
//========================================================================
 
#ifndef DICT_H
#define DICT_H
 
#include <aconf.h>
 
#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
 
#include "Object.h"
 
//------------------------------------------------------------------------
// Dict
//------------------------------------------------------------------------
 
struct DictEntry {
  char *key;
  Object val;
};
 
class Dict {
public:
 
  // Constructor.
  Dict(XRef *xrefA);
 
  // Destructor.
  ~Dict();
 
  // Reference counting.
  int incRef() { return ++ref; }
  int decRef() { return --ref; }
 
  // Get number of entries.
  int getLength() { return length; }
 
  // Add an entry.  NB: does not copy key.
  void add(char *key, Object *val);
 
  // Check if dictionary is of specified type.
  GBool is(const char *type);
 
  // Look up an entry and return the value.  Returns a null object
  // if <key> is not in the dictionary.
  Object *lookup(const char *key, Object *obj);
  Object *lookupNF(const char *key, Object *obj);
 
  // Iterative accessors.
  char *getKey(int i);
  Object *getVal(int i, Object *obj);
  Object *getValNF(int i, Object *obj);
 
  // Set the xref pointer.  This is only used in one special case: the
  // trailer dictionary, which is read before the xref table is
  // parsed.
  void setXRef(XRef *xrefA) { xref = xrefA; }
 
private:
 
  XRef *xref;           // the xref table for this PDF file
  DictEntry *entries;       // array of entries
  int size;         // size of <entries> array
  int length;           // number of entries in dictionary
  int ref;          // reference count
 
  DictEntry *find(const char *key);
};
 
#endif