1 //========================================================================
5 // Copyright 1996-2002 Glyph & Cog, LLC
7 //========================================================================
27 //------------------------------------------------------------------------
29 //------------------------------------------------------------------------
32 int num; // object number
33 int gen; // generation number
36 //------------------------------------------------------------------------
38 //------------------------------------------------------------------------
51 objDict, // dictionary
53 objRef, // indirect reference
56 objCmd, // command name
57 objError, // error return from Lexer
58 objEOF, // end of file return from Lexer
59 objNone // uninitialized object
62 #define numObjTypes 14 // total number of object types
64 //------------------------------------------------------------------------
66 //------------------------------------------------------------------------
69 #define initObj(t) ++numAlloc[type = t]
71 #define initObj(t) type = t
77 // Default constructor.
81 // Initialize an object.
82 Object *initBool(GBool boolnA)
83 { initObj(objBool); booln = boolnA; return this; }
84 Object *initInt(int intgA)
85 { initObj(objInt); intg = intgA; return this; }
86 Object *initReal(double realA)
87 { initObj(objReal); real = realA; return this; }
88 Object *initString(GString *stringA)
89 { initObj(objString); string = stringA; return this; }
90 Object *initName(char *nameA)
91 { initObj(objName); name = copyString(nameA); return this; }
93 { initObj(objNull); return this; }
94 Object *initArray(XRef *xref);
95 Object *initDict(XRef *xref);
96 Object *initStream(Stream *streamA);
97 Object *initRef(int numA, int genA)
98 { initObj(objRef); ref.num = numA; ref.gen = genA; return this; }
99 Object *initCmd(char *cmdA)
100 { initObj(objCmd); cmd = copyString(cmdA); return this; }
102 { initObj(objError); return this; }
104 { initObj(objEOF); return this; }
107 Object *copy(Object *obj);
109 // If object is a Ref, fetch and return the referenced object.
110 // Otherwise, return a copy of the object.
111 Object *fetch(XRef *xref, Object *obj);
113 // Free object contents.
117 ObjType getType() { return type; }
118 GBool isBool() { return type == objBool; }
119 GBool isInt() { return type == objInt; }
120 GBool isReal() { return type == objReal; }
121 GBool isNum() { return type == objInt || type == objReal; }
122 GBool isString() { return type == objString; }
123 GBool isName() { return type == objName; }
124 GBool isNull() { return type == objNull; }
125 GBool isArray() { return type == objArray; }
126 GBool isDict() { return type == objDict; }
127 GBool isStream() { return type == objStream; }
128 GBool isRef() { return type == objRef; }
129 GBool isCmd() { return type == objCmd; }
130 GBool isError() { return type == objError; }
131 GBool isEOF() { return type == objEOF; }
132 GBool isNone() { return type == objNone; }
134 // Special type checking.
135 GBool isName(char *nameA)
136 { return type == objName && !strcmp(name, nameA); }
137 GBool isDict(char *dictType);
138 GBool isStream(char *dictType);
139 GBool isCmd(char *cmdA)
140 { return type == objCmd && !strcmp(cmd, cmdA); }
142 // Accessors. NB: these assume object is of correct type.
143 GBool getBool() { return booln; }
144 int getInt() { return intg; }
145 double getReal() { return real; }
146 double getNum() { return type == objInt ? (double)intg : real; }
147 GString *getString() { return string; }
148 char *getName() { return name; }
149 Array *getArray() { return array; }
150 Dict *getDict() { return dict; }
151 Stream *getStream() { return stream; }
152 Ref getRef() { return ref; }
153 int getRefNum() { return ref.num; }
154 int getRefGen() { return ref.gen; }
157 int arrayGetLength();
158 void arrayAdd(Object *elem);
159 Object *arrayGet(int i, Object *obj);
160 Object *arrayGetNF(int i, Object *obj);
164 void dictAdd(char *key, Object *val);
165 GBool dictIs(char *dictType);
166 Object *dictLookup(char *key, Object *obj);
167 Object *dictLookupNF(char *key, Object *obj);
168 char *dictGetKey(int i);
169 Object *dictGetVal(int i, Object *obj);
170 Object *dictGetValNF(int i, Object *obj);
173 GBool streamIs(char *dictType);
177 int streamLookChar();
178 char *streamGetLine(char *buf, int size);
179 Guint streamGetPos();
180 void streamSetPos(Guint pos, int dir = 0);
181 Dict *streamGetDict();
185 void print(FILE *f = stdout);
188 static void memCheck(FILE *f);
192 ObjType type; // object type
193 union { // value for each type:
194 GBool booln; // boolean
197 GString *string; // string
199 Array *array; // array
200 Dict *dict; // dictionary
201 Stream *stream; // stream
202 Ref ref; // indirect reference
203 char *cmd; // command
207 static int // number of each type of object
208 numAlloc[numObjTypes]; // currently allocated
212 //------------------------------------------------------------------------
214 //------------------------------------------------------------------------
218 inline int Object::arrayGetLength()
219 { return array->getLength(); }
221 inline void Object::arrayAdd(Object *elem)
222 { array->add(elem); }
224 inline Object *Object::arrayGet(int i, Object *obj)
225 { return array->get(i, obj); }
227 inline Object *Object::arrayGetNF(int i, Object *obj)
228 { return array->getNF(i, obj); }
230 //------------------------------------------------------------------------
232 //------------------------------------------------------------------------
236 inline int Object::dictGetLength()
237 { return dict->getLength(); }
239 inline void Object::dictAdd(char *key, Object *val)
240 { dict->add(key, val); }
242 inline GBool Object::dictIs(char *dictType)
243 { return dict->is(dictType); }
245 inline GBool Object::isDict(char *dictType)
246 { return type == objDict && dictIs(dictType); }
248 inline Object *Object::dictLookup(char *key, Object *obj)
249 { return dict->lookup(key, obj); }
251 inline Object *Object::dictLookupNF(char *key, Object *obj)
252 { return dict->lookupNF(key, obj); }
254 inline char *Object::dictGetKey(int i)
255 { return dict->getKey(i); }
257 inline Object *Object::dictGetVal(int i, Object *obj)
258 { return dict->getVal(i, obj); }
260 inline Object *Object::dictGetValNF(int i, Object *obj)
261 { return dict->getValNF(i, obj); }
263 //------------------------------------------------------------------------
265 //------------------------------------------------------------------------
269 inline GBool Object::streamIs(char *dictType)
270 { return stream->getDict()->is(dictType); }
272 inline GBool Object::isStream(char *dictType)
273 { return type == objStream && streamIs(dictType); }
275 inline void Object::streamReset()
278 inline void Object::streamClose()
281 inline int Object::streamGetChar()
282 { return stream->getChar(); }
284 inline int Object::streamLookChar()
285 { return stream->lookChar(); }
287 inline char *Object::streamGetLine(char *buf, int size)
288 { return stream->getLine(buf, size); }
290 inline Guint Object::streamGetPos()
291 { return stream->getPos(); }
293 inline void Object::streamSetPos(Guint pos, int dir)
294 { stream->setPos(pos, dir); }
296 inline Dict *Object::streamGetDict()
297 { return stream->getDict(); }