2 Copyright (C) 2006 Georgia Public Library Service
3 Bill Erickson <billserickson@gmail.com>
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
17 #include <opensrf/log.h>
18 #include <opensrf/osrf_json.h>
19 #include <opensrf/osrf_json_utils.h>
21 /* cleans up an object if it is morphing another object, also
22 * verifies that the appropriate storage container exists where appropriate */
23 #define JSON_INIT_CLEAR(_obj_, newtype) \
24 if( _obj_->type == JSON_HASH && newtype != JSON_HASH ) { \
25 osrfHashFree(_obj_->value.h); \
26 _obj_->value.h = NULL; \
27 } else if( _obj_->type == JSON_ARRAY && newtype != JSON_ARRAY ) { \
28 osrfListFree(_obj_->value.l); \
29 _obj_->value.l = NULL; \
30 } else if( _obj_->type == JSON_STRING && newtype != JSON_STRING ) { \
31 free(_obj_->value.s); \
32 _obj_->value.s = NULL; \
34 _obj_->type = newtype;\
35 if( newtype == JSON_HASH && _obj_->value.h == NULL ) { \
36 _obj_->value.h = osrfNewHash(); \
37 _obj_->value.h->freeItem = _jsonFreeHashItem; \
38 } else if( newtype == JSON_ARRAY && _obj_->value.l == NULL ) { \
39 _obj_->value.l = osrfNewList(); \
40 _obj_->value.l->freeItem = _jsonFreeListItem;\
43 static int unusedObjCapture = 0;
44 static int unusedObjRelease = 0;
48 union unusedObjUnion* next;
51 typedef union unusedObjUnion unusedObj;
53 // We maintain a free list of jsonObjects that are available
54 // for use, in order to reduce the churning through
55 // malloc() and free().
57 static unusedObj* freeObjList = NULL;
59 static void add_json_to_buffer( const jsonObject* obj, growing_buffer * buf );
62 * Return all unused jsonObjects to the heap
65 void jsonObjectFreeUnused( void ) {
68 while( freeObjList ) {
69 temp = freeObjList->next;
75 jsonObject* jsonNewObject(const char* data) {
80 o = (jsonObject*) freeObjList;
81 freeObjList = freeObjList->next;
85 OSRF_MALLOC( o, sizeof(jsonObject) );
92 o->type = JSON_STRING;
93 o->value.s = strdup(data);
102 jsonObject* jsonNewObjectFmt(const char* data, ...) {
107 o = (jsonObject*) freeObjList;
108 freeObjList = freeObjList->next;
111 OSRF_MALLOC( o, sizeof(jsonObject) );
118 VA_LIST_TO_STRING(data);
119 o->type = JSON_STRING;
120 o->value.s = strdup(VA_BUF);
130 jsonObject* jsonNewNumberObject( double num ) {
131 jsonObject* o = jsonNewObject(NULL);
132 o->type = JSON_NUMBER;
137 jsonObject* jsonNewBoolObject(int val) {
138 jsonObject* o = jsonNewObject(NULL);
144 jsonObject* jsonNewObjectType(int type) {
145 jsonObject* o = jsonNewObject(NULL);
150 void jsonObjectFree( jsonObject* o ) {
152 if(!o || o->parent) return;
156 case JSON_HASH : osrfHashFree(o->value.h); break;
157 case JSON_ARRAY : osrfListFree(o->value.l); break;
158 case JSON_STRING : free(o->value.s); break;
161 // Stick the old jsonObject onto a free list
162 // for potential reuse
164 unusedObj* unused = (unusedObj*) o;
165 unused->next = freeObjList;
166 freeObjList = unused;
169 if (unusedObjCapture > 1 && !(unusedObjCapture % 1000))
170 osrfLogDebug( OSRF_LOG_MARK, "Reusable objects captured: %d, Objects reused: %d", unusedObjCapture, unusedObjRelease );
173 static void _jsonFreeHashItem(char* key, void* item){
175 jsonObject* o = (jsonObject*) item;
176 o->parent = NULL; /* detach the item */
179 static void _jsonFreeListItem(void* item){
181 jsonObject* o = (jsonObject*) item;
182 o->parent = NULL; /* detach the item */
186 void jsonSetBool(jsonObject* bl, int val) {
188 JSON_INIT_CLEAR(bl, JSON_BOOL);
192 unsigned long jsonObjectPush(jsonObject* o, jsonObject* newo) {
194 if(!newo) newo = jsonNewObject(NULL);
195 JSON_INIT_CLEAR(o, JSON_ARRAY);
197 osrfListPush( o->value.l, newo );
198 o->size = o->value.l->size;
202 unsigned long jsonObjectSetIndex(jsonObject* dest, unsigned long index, jsonObject* newObj) {
204 if(!newObj) newObj = jsonNewObject(NULL);
205 JSON_INIT_CLEAR(dest, JSON_ARRAY);
206 newObj->parent = dest;
207 osrfListSet( dest->value.l, newObj, index );
208 dest->size = dest->value.l->size;
209 return dest->value.l->size;
212 unsigned long jsonObjectSetKey( jsonObject* o, const char* key, jsonObject* newo) {
214 if(!newo) newo = jsonNewObject(NULL);
215 JSON_INIT_CLEAR(o, JSON_HASH);
217 osrfHashSet( o->value.h, newo, key );
218 o->size = o->value.h->size;
222 jsonObject* jsonObjectGetKey( jsonObject* obj, const char* key ) {
223 if(!(obj && obj->type == JSON_HASH && obj->value.h && key)) return NULL;
224 return osrfHashGet( obj->value.h, key);
227 const jsonObject* jsonObjectGetKeyConst( const jsonObject* obj, const char* key ) {
228 if(!(obj && obj->type == JSON_HASH && obj->value.h && key)) return NULL;
229 return osrfHashGet( obj->value.h, key);
232 char* jsonObjectToJSON( const jsonObject* obj ) {
233 jsonObject* obj2 = jsonObjectEncodeClass( obj );
234 char* json = jsonObjectToJSONRaw(obj2);
235 jsonObjectFree(obj2);
239 char* jsonObjectToJSONRaw( const jsonObject* obj ) {
240 if(!obj) return NULL;
241 growing_buffer* buf = buffer_init(32);
242 add_json_to_buffer( obj, buf );
243 return buffer_release( buf );
246 static void add_json_to_buffer( const jsonObject* obj, growing_buffer * buf ) {
251 if(obj->value.b) OSRF_BUFFER_ADD(buf, "true");
252 else OSRF_BUFFER_ADD(buf, "false");
256 double x = obj->value.n;
257 if( x <= INT_MAX && x >= INT_MIN && x == (int) x ) {
258 INT_TO_STRING((int)x);
259 OSRF_BUFFER_ADD(buf, INTSTR);
263 OSRF_BUFFER_ADD(buf, DOUBLESTR);
269 OSRF_BUFFER_ADD(buf, "null");
273 OSRF_BUFFER_ADD_CHAR(buf, '"');
274 char* data = obj->value.s;
275 int len = strlen(data);
277 char* output = uescape(data, len, 1);
278 OSRF_BUFFER_ADD(buf, output);
280 OSRF_BUFFER_ADD_CHAR(buf, '"');
284 OSRF_BUFFER_ADD_CHAR(buf, '[');
287 for( i = 0; i != obj->value.l->size; i++ ) {
288 if(i > 0) OSRF_BUFFER_ADD(buf, ",");
289 add_json_to_buffer( OSRF_LIST_GET_INDEX(obj->value.l, i), buf );
292 OSRF_BUFFER_ADD_CHAR(buf, ']');
298 OSRF_BUFFER_ADD_CHAR(buf, '{');
299 osrfHashIterator* itr = osrfNewHashIterator(obj->value.h);
303 while( (item = osrfHashIteratorNext(itr)) ) {
304 if(i++ > 0) OSRF_BUFFER_ADD(buf, ",");
305 buffer_fadd(buf, "\"%s\":", itr->current);
306 add_json_to_buffer( item, buf );
309 osrfHashIteratorFree(itr);
310 OSRF_BUFFER_ADD_CHAR(buf, '}');
317 jsonIterator* jsonNewIterator(const jsonObject* obj) {
318 if(!obj) return NULL;
320 OSRF_MALLOC(itr, sizeof(jsonIterator));
322 itr->obj = (jsonObject*) obj;
326 if( obj->type == JSON_HASH )
327 itr->hashItr = osrfNewHashIterator(obj->value.h);
332 void jsonIteratorFree(jsonIterator* itr) {
335 osrfHashIteratorFree(itr->hashItr);
339 jsonObject* jsonIteratorNext(jsonIterator* itr) {
340 if(!(itr && itr->obj)) return NULL;
341 if( itr->obj->type == JSON_HASH ) {
342 if(!itr->hashItr) return NULL;
343 jsonObject* item = osrfHashIteratorNext(itr->hashItr);
345 itr->key = strdup(itr->hashItr->current);
348 return jsonObjectGetIndex( itr->obj, itr->index++ );
352 int jsonIteratorHasNext(const jsonIterator* itr) {
353 if(!(itr && itr->obj)) return 0;
354 if( itr->obj->type == JSON_HASH )
355 return osrfHashIteratorHasNext( itr->hashItr );
356 return (itr->index < itr->obj->size) ? 1 : 0;
359 jsonObject* jsonObjectGetIndex( const jsonObject* obj, unsigned long index ) {
360 if(!obj) return NULL;
361 return (obj->type == JSON_ARRAY) ?
362 (OSRF_LIST_GET_INDEX(obj->value.l, index)) : NULL;
367 unsigned long jsonObjectRemoveIndex(jsonObject* dest, unsigned long index) {
368 if( dest && dest->type == JSON_ARRAY ) {
369 osrfListRemove(dest->value.l, index);
370 return dest->value.l->size;
376 unsigned long jsonObjectRemoveKey( jsonObject* dest, const char* key) {
377 if( dest && key && dest->type == JSON_HASH ) {
378 osrfHashRemove(dest->value.h, key);
384 char* jsonObjectGetString(const jsonObject* obj) {
385 return (obj && obj->type == JSON_STRING) ? obj->value.s : NULL;
388 double jsonObjectGetNumber( const jsonObject* obj ) {
389 return (obj && obj->type == JSON_NUMBER) ? obj->value.n : 0;
392 void jsonObjectSetString(jsonObject* dest, const char* string) {
393 if(!(dest && string)) return;
394 JSON_INIT_CLEAR(dest, JSON_STRING);
396 dest->value.s = strdup(string);
399 void jsonObjectSetNumber(jsonObject* dest, double num) {
401 JSON_INIT_CLEAR(dest, JSON_NUMBER);
405 void jsonObjectSetClass(jsonObject* dest, const char* classname ) {
406 if(!(dest && classname)) return;
407 free(dest->classname);
408 dest->classname = strdup(classname);
410 const char* jsonObjectGetClass(const jsonObject* dest) {
411 if(!dest) return NULL;
412 return dest->classname;
415 jsonObject* jsonObjectClone( const jsonObject* o ) {
416 if(!o) return jsonNewObject(NULL);
423 jsonObject* result = NULL;
427 result = jsonNewObject(NULL);
430 result = jsonNewObject(jsonObjectGetString(o));
433 result = jsonNewNumberObject(jsonObjectGetNumber(o));
436 result = jsonNewBoolObject(jsonBoolIsTrue((jsonObject*) o));
439 arr = jsonNewObject(NULL);
440 arr->type = JSON_ARRAY;
441 for(i=0; i < o->size; i++)
442 jsonObjectPush(arr, jsonObjectClone(jsonObjectGetIndex(o, i)));
446 hash = jsonNewObject(NULL);
447 hash->type = JSON_HASH;
448 itr = jsonNewIterator(o);
449 while( (tmp = jsonIteratorNext(itr)) )
450 jsonObjectSetKey(hash, itr->key, jsonObjectClone(tmp));
451 jsonIteratorFree(itr);
456 jsonObjectSetClass(result, jsonObjectGetClass(o));
460 int jsonBoolIsTrue( const jsonObject* boolObj ) {
461 if( boolObj && boolObj->type == JSON_BOOL && boolObj->value.b )
467 char* jsonObjectToSimpleString( const jsonObject* o ) {
476 if( o->value.n == (int) o->value.n ) {
477 INT_TO_STRING((int) o->value.n);
478 value = strdup(INTSTR);
481 DOUBLE_TO_STRING(o->value.n);
482 value = strdup(DOUBLESTR);
489 value = strdup(o->value.s);