1 //========================================================================
5 // Copyright 1996-2003 Glyph & Cog, LLC
7 //========================================================================
14 #ifdef USE_GCC_PRAGMAS
29 //------------------------------------------------------------------------
31 //------------------------------------------------------------------------
34 int num; // object number
35 int gen; // generation number
38 //------------------------------------------------------------------------
40 //------------------------------------------------------------------------
53 objDict, // dictionary
55 objRef, // indirect reference
58 objCmd, // command name
59 objError, // error return from Lexer
60 objEOF, // end of file return from Lexer
61 objNone // uninitialized object
64 #define numObjTypes 14 // total number of object types
66 //------------------------------------------------------------------------
68 //------------------------------------------------------------------------
71 #define initObj(t) ++numAlloc[type = t]
73 #define initObj(t) type = t
79 // Default constructor.
83 // Initialize an object.
84 Object *initBool(GBool boolnA)
85 { initObj(objBool); booln = boolnA; return this; }
86 Object *initInt(int intgA)
87 { initObj(objInt); intg = intgA; return this; }
88 Object *initReal(double realA)
89 { initObj(objReal); real = realA; return this; }
90 Object *initString(GString *stringA)
91 { initObj(objString); string = stringA; return this; }
92 Object *initName(char *nameA)
93 { initObj(objName); name = copyString(nameA); return this; }
95 { initObj(objNull); return this; }
96 Object *initArray(XRef *xref);
97 Object *initDict(XRef *xref);
98 Object *initDict(Dict *dictA);
99 Object *initStream(Stream *streamA);
100 Object *initRef(int numA, int genA)
101 { initObj(objRef); ref.num = numA; ref.gen = genA; return this; }
102 Object *initCmd(char *cmdA)
103 { initObj(objCmd); cmd = copyString(cmdA); return this; }
105 { initObj(objError); return this; }
107 { initObj(objEOF); return this; }
110 Object *copy(Object *obj);
112 // If object is a Ref, fetch and return the referenced object.
113 // Otherwise, return a copy of the object.
114 Object *fetch(XRef *xref, Object *obj);
116 // Free object contents.
120 ObjType getType() { return type; }
121 GBool isBool() { return type == objBool; }
122 GBool isInt() { return type == objInt; }
123 GBool isReal() { return type == objReal; }
124 GBool isNum() { return type == objInt || type == objReal; }
125 GBool isString() { return type == objString; }
126 GBool isName() { return type == objName; }
127 GBool isNull() { return type == objNull; }
128 GBool isArray() { return type == objArray; }
129 GBool isDict() { return type == objDict; }
130 GBool isStream() { return type == objStream; }
131 GBool isRef() { return type == objRef; }
132 GBool isCmd() { return type == objCmd; }
133 GBool isError() { return type == objError; }
134 GBool isEOF() { return type == objEOF; }
135 GBool isNone() { return type == objNone; }
137 // Special type checking.
138 GBool isName(char *nameA)
139 { return type == objName && !strcmp(name, nameA); }
140 GBool isDict(char *dictType);
141 GBool isStream(char *dictType);
142 GBool isCmd(char *cmdA)
143 { return type == objCmd && !strcmp(cmd, cmdA); }
145 // Accessors. NB: these assume object is of correct type.
146 GBool getBool() { return booln; }
147 int getInt() { return intg; }
148 double getReal() { return real; }
149 double getNum() { return type == objInt ? (double)intg : real; }
150 GString *getString() { return string; }
151 char *getName() { return name; }
152 Array *getArray() { return array; }
153 Dict *getDict() { return dict; }
154 Stream *getStream() { return stream; }
155 Ref getRef() { return ref; }
156 int getRefNum() { return ref.num; }
157 int getRefGen() { return ref.gen; }
158 char *getCmd() { return cmd; }
161 int arrayGetLength();
162 void arrayAdd(Object *elem);
163 Object *arrayGet(int i, Object *obj);
164 Object *arrayGetNF(int i, Object *obj);
168 void dictAdd(char *key, Object *val);
169 GBool dictIs(char *dictType);
170 Object *dictLookup(char *key, Object *obj);
171 Object *dictLookupNF(char *key, Object *obj);
172 char *dictGetKey(int i);
173 Object *dictGetVal(int i, Object *obj);
174 Object *dictGetValNF(int i, Object *obj);
177 GBool streamIs(char *dictType);
181 int streamLookChar();
182 char *streamGetLine(char *buf, int size);
183 Guint streamGetPos();
184 void streamSetPos(Guint pos, int dir = 0);
185 Dict *streamGetDict();
189 void print(FILE *f = stdout);
192 static void memCheck(FILE *f);
196 ObjType type; // object type
197 union { // value for each type:
198 GBool booln; // boolean
201 GString *string; // string
203 Array *array; // array
204 Dict *dict; // dictionary
205 Stream *stream; // stream
206 Ref ref; // indirect reference
207 char *cmd; // command
211 static int // number of each type of object
212 numAlloc[numObjTypes]; // currently allocated
216 //------------------------------------------------------------------------
218 //------------------------------------------------------------------------
222 inline int Object::arrayGetLength()
223 { return array->getLength(); }
225 inline void Object::arrayAdd(Object *elem)
226 { array->add(elem); }
228 inline Object *Object::arrayGet(int i, Object *obj)
229 { return array->get(i, obj); }
231 inline Object *Object::arrayGetNF(int i, Object *obj)
232 { return array->getNF(i, obj); }
234 //------------------------------------------------------------------------
236 //------------------------------------------------------------------------
240 inline int Object::dictGetLength()
241 { return dict->getLength(); }
243 inline void Object::dictAdd(char *key, Object *val)
244 { dict->add(key, val); }
246 inline GBool Object::dictIs(char *dictType)
247 { return dict->is(dictType); }
249 inline GBool Object::isDict(char *dictType)
250 { return type == objDict && dictIs(dictType); }
252 inline Object *Object::dictLookup(char *key, Object *obj)
253 { return dict->lookup(key, obj); }
255 inline Object *Object::dictLookupNF(char *key, Object *obj)
256 { return dict->lookupNF(key, obj); }
258 inline char *Object::dictGetKey(int i)
259 { return dict->getKey(i); }
261 inline Object *Object::dictGetVal(int i, Object *obj)
262 { return dict->getVal(i, obj); }
264 inline Object *Object::dictGetValNF(int i, Object *obj)
265 { return dict->getValNF(i, obj); }
267 //------------------------------------------------------------------------
269 //------------------------------------------------------------------------
273 inline GBool Object::streamIs(char *dictType)
274 { return stream->getDict()->is(dictType); }
276 inline GBool Object::isStream(char *dictType)
277 { return type == objStream && streamIs(dictType); }
279 inline void Object::streamReset()
282 inline void Object::streamClose()
285 inline int Object::streamGetChar()
286 { return stream->getChar(); }
288 inline int Object::streamLookChar()
289 { return stream->lookChar(); }
291 inline char *Object::streamGetLine(char *buf, int size)
292 { return stream->getLine(buf, size); }
294 inline Guint Object::streamGetPos()
295 { return stream->getPos(); }
297 inline void Object::streamSetPos(Guint pos, int dir)
298 { stream->setPos(pos, dir); }
300 inline Dict *Object::streamGetDict()
301 { return stream->getDict(); }