pdftops/Dict.cxx

   1 //========================================================================
   2 //
   3 // Dict.cc
   4 //
   5 // Copyright 1996-2003 Glyph & Cog, LLC
   6 //
   7 //========================================================================
   8
   9 #include <config.h>
  10
  11 #ifdef USE_GCC_PRAGMAS
  12 #pragma implementation
  13 #endif
  14
  15 #include <stddef.h>
  16 #include <string.h>
  17 #include "gmem.h"
  18 #include "Object.h"
  19 #include "XRef.h"
  20 #include "Dict.h"
  21
  22 //------------------------------------------------------------------------
  23 // Dict
  24 //------------------------------------------------------------------------
  25
  26 Dict::Dict(XRef *xrefA) {
  27   xref = xrefA;
  28   entries = NULL;
  29   size = length = 0;
  30   ref = 1;
  31 }
  32
  33 Dict::~Dict() {
  34   int i;
  35
  36   for (i = 0; i < length; ++i) {
  37     gfree(entries[i].key);
  38     entries[i].val.free();
  39   }
  40   gfree(entries);
  41 }
  42
  43 void Dict::add(char *key, Object *val) {
  44   if (length == size) {
  45     if (length == 0) {
  46       size = 8;
  47     } else {
  48       size *= 2;
  49     }
  50     entries = (DictEntry *)greallocn(entries, size, sizeof(DictEntry));
  51   }
  52   entries[length].key = key;
  53   entries[length].val = *val;
  54   ++length;
  55 }
  56
  57 inline DictEntry *Dict::find(char *key) {
  58   int i;
  59
  60   for (i = 0; i < length; ++i) {
  61     if (!strcmp(key, entries[i].key))
  62       return &entries[i];
  63   }
  64   return NULL;
  65 }
  66
  67 GBool Dict::is(char *type) {
  68   DictEntry *e;
  69
  70   return (e = find("Type")) && e->val.isName(type);
  71 }
  72
  73 Object *Dict::lookup(char *key, Object *obj) {
  74   DictEntry *e;
  75
  76   return (e = find(key)) ? e->val.fetch(xref, obj) : obj->initNull();
  77 }
  78
  79 Object *Dict::lookupNF(char *key, Object *obj) {
  80   DictEntry *e;
  81
  82   return (e = find(key)) ? e->val.copy(obj) : obj->initNull();
  83 }
  84
  85 char *Dict::getKey(int i) {
  86   return entries[i].key;
  87 }
  88
  89 Object *Dict::getVal(int i, Object *obj) {
  90   return entries[i].val.fetch(xref, obj);
  91 }
  92
  93 Object *Dict::getValNF(int i, Object *obj) {
  94   return entries[i].val.copy(obj);
  95 }