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;
45 static int mallocObjCreate = 0;
49 union unusedObjUnion* next;
52 typedef union unusedObjUnion unusedObj;
54 // We maintain a free list of jsonObjects that are available
55 // for use, in order to reduce the churning through
56 // malloc() and free().
58 static unusedObj* freeObjList = NULL;
60 static void add_json_to_buffer( const jsonObject* obj, growing_buffer * buf );
63 * Return all unused jsonObjects to the heap
66 void jsonObjectFreeUnused( void ) {
69 while( freeObjList ) {
70 temp = freeObjList->next;
76 jsonObject* jsonNewObject(const char* data) {
81 o = (jsonObject*) freeObjList;
82 freeObjList = freeObjList->next;
85 OSRF_MALLOC( o, sizeof(jsonObject) );
94 o->type = JSON_STRING;
95 o->value.s = strdup(data);
104 jsonObject* jsonNewObjectFmt(const char* data, ...) {
109 o = (jsonObject*) freeObjList;
110 freeObjList = freeObjList->next;
113 OSRF_MALLOC( o, sizeof(jsonObject) );
120 VA_LIST_TO_STRING(data);
121 o->type = JSON_STRING;
122 o->value.s = strdup(VA_BUF);
132 jsonObject* jsonNewNumberObject( double num ) {
133 jsonObject* o = jsonNewObject(NULL);
134 o->type = JSON_NUMBER;
139 jsonObject* jsonNewBoolObject(int val) {
140 jsonObject* o = jsonNewObject(NULL);
146 jsonObject* jsonNewObjectType(int type) {
147 jsonObject* o = jsonNewObject(NULL);
152 void jsonObjectFree( jsonObject* o ) {
154 if(!o || o->parent) return;
158 case JSON_HASH : osrfHashFree(o->value.h); break;
159 case JSON_ARRAY : osrfListFree(o->value.l); break;
160 case JSON_STRING : free(o->value.s); break;
163 // Stick the old jsonObject onto a free list
164 // for potential reuse
166 unusedObj* unused = (unusedObj*) o;
167 unused->next = freeObjList;
168 freeObjList = unused;
171 if (unusedObjCapture > 1 && !(unusedObjCapture % 1000))
172 osrfLogDebug( OSRF_LOG_MARK, "Objects malloc()'d: %d, Reusable objects captured: %d, Objects reused: %d", mallocObjCreate, unusedObjCapture, unusedObjRelease );
175 static void _jsonFreeHashItem(char* key, void* item){
177 jsonObject* o = (jsonObject*) item;
178 o->parent = NULL; /* detach the item */
181 static void _jsonFreeListItem(void* item){
183 jsonObject* o = (jsonObject*) item;
184 o->parent = NULL; /* detach the item */
188 void jsonSetBool(jsonObject* bl, int val) {
190 JSON_INIT_CLEAR(bl, JSON_BOOL);
194 unsigned long jsonObjectPush(jsonObject* o, jsonObject* newo) {
196 if(!newo) newo = jsonNewObject(NULL);
197 JSON_INIT_CLEAR(o, JSON_ARRAY);
199 osrfListPush( o->value.l, newo );
200 o->size = o->value.l->size;
204 unsigned long jsonObjectSetIndex(jsonObject* dest, unsigned long index, jsonObject* newObj) {
206 if(!newObj) newObj = jsonNewObject(NULL);
207 JSON_INIT_CLEAR(dest, JSON_ARRAY);
208 newObj->parent = dest;
209 osrfListSet( dest->value.l, newObj, index );
210 dest->size = dest->value.l->size;
211 return dest->value.l->size;
214 unsigned long jsonObjectSetKey( jsonObject* o, const char* key, jsonObject* newo) {
216 if(!newo) newo = jsonNewObject(NULL);
217 JSON_INIT_CLEAR(o, JSON_HASH);
219 osrfHashSet( o->value.h, newo, key );
220 o->size = o->value.h->size;
224 jsonObject* jsonObjectGetKey( jsonObject* obj, const char* key ) {
225 if(!(obj && obj->type == JSON_HASH && obj->value.h && key)) return NULL;
226 return osrfHashGet( obj->value.h, key);
229 const jsonObject* jsonObjectGetKeyConst( const jsonObject* obj, const char* key ) {
230 if(!(obj && obj->type == JSON_HASH && obj->value.h && key)) return NULL;
231 return osrfHashGet( obj->value.h, key);
234 char* jsonObjectToJSON( const jsonObject* obj ) {
235 jsonObject* obj2 = jsonObjectEncodeClass( obj );
236 char* json = jsonObjectToJSONRaw(obj2);
237 jsonObjectFree(obj2);
241 char* jsonObjectToJSONRaw( const jsonObject* obj ) {
242 if(!obj) return NULL;
243 growing_buffer* buf = buffer_init(32);
244 add_json_to_buffer( obj, buf );
245 return buffer_release( buf );
248 static void add_json_to_buffer( const jsonObject* obj, growing_buffer * buf ) {
253 if(obj->value.b) OSRF_BUFFER_ADD(buf, "true");
254 else OSRF_BUFFER_ADD(buf, "false");
258 double x = obj->value.n;
259 if( x <= INT_MAX && x >= INT_MIN && x == (int) x ) {
260 INT_TO_STRING((int)x);
261 OSRF_BUFFER_ADD(buf, INTSTR);
265 OSRF_BUFFER_ADD(buf, DOUBLESTR);
271 OSRF_BUFFER_ADD(buf, "null");
275 OSRF_BUFFER_ADD_CHAR(buf, '"');
276 char* data = obj->value.s;
277 int len = strlen(data);
279 char* output = uescape(data, len, 1);
280 OSRF_BUFFER_ADD(buf, output);
282 OSRF_BUFFER_ADD_CHAR(buf, '"');
286 OSRF_BUFFER_ADD_CHAR(buf, '[');
289 for( i = 0; i != obj->value.l->size; i++ ) {
290 if(i > 0) OSRF_BUFFER_ADD(buf, ",");
291 add_json_to_buffer( OSRF_LIST_GET_INDEX(obj->value.l, i), buf );
294 OSRF_BUFFER_ADD_CHAR(buf, ']');
300 OSRF_BUFFER_ADD_CHAR(buf, '{');
301 osrfHashIterator* itr = osrfNewHashIterator(obj->value.h);
305 while( (item = osrfHashIteratorNext(itr)) ) {
306 if(i++ > 0) OSRF_BUFFER_ADD(buf, ",");
307 buffer_fadd(buf, "\"%s\":", itr->current);
308 add_json_to_buffer( item, buf );
311 osrfHashIteratorFree(itr);
312 OSRF_BUFFER_ADD_CHAR(buf, '}');
319 jsonIterator* jsonNewIterator(const jsonObject* obj) {
320 if(!obj) return NULL;
322 OSRF_MALLOC(itr, sizeof(jsonIterator));
324 itr->obj = (jsonObject*) obj;
328 if( obj->type == JSON_HASH )
329 itr->hashItr = osrfNewHashIterator(obj->value.h);
334 void jsonIteratorFree(jsonIterator* itr) {
337 osrfHashIteratorFree(itr->hashItr);
341 jsonObject* jsonIteratorNext(jsonIterator* itr) {
342 if(!(itr && itr->obj)) return NULL;
343 if( itr->obj->type == JSON_HASH ) {
344 if(!itr->hashItr) return NULL;
345 jsonObject* item = osrfHashIteratorNext(itr->hashItr);
347 itr->key = strdup(itr->hashItr->current);
350 return jsonObjectGetIndex( itr->obj, itr->index++ );
354 int jsonIteratorHasNext(const jsonIterator* itr) {
355 if(!(itr && itr->obj)) return 0;
356 if( itr->obj->type == JSON_HASH )
357 return osrfHashIteratorHasNext( itr->hashItr );
358 return (itr->index < itr->obj->size) ? 1 : 0;
361 jsonObject* jsonObjectGetIndex( const jsonObject* obj, unsigned long index ) {
362 if(!obj) return NULL;
363 return (obj->type == JSON_ARRAY) ?
364 (OSRF_LIST_GET_INDEX(obj->value.l, index)) : NULL;
369 unsigned long jsonObjectRemoveIndex(jsonObject* dest, unsigned long index) {
370 if( dest && dest->type == JSON_ARRAY ) {
371 osrfListRemove(dest->value.l, index);
372 return dest->value.l->size;
378 unsigned long jsonObjectRemoveKey( jsonObject* dest, const char* key) {
379 if( dest && key && dest->type == JSON_HASH ) {
380 osrfHashRemove(dest->value.h, key);
386 char* jsonObjectGetString(const jsonObject* obj) {
387 return (obj && obj->type == JSON_STRING) ? obj->value.s : NULL;
390 double jsonObjectGetNumber( const jsonObject* obj ) {
391 return (obj && obj->type == JSON_NUMBER) ? obj->value.n : 0;
394 void jsonObjectSetString(jsonObject* dest, const char* string) {
395 if(!(dest && string)) return;
396 JSON_INIT_CLEAR(dest, JSON_STRING);
398 dest->value.s = strdup(string);
401 void jsonObjectSetNumber(jsonObject* dest, double num) {
403 JSON_INIT_CLEAR(dest, JSON_NUMBER);
407 void jsonObjectSetClass(jsonObject* dest, const char* classname ) {
408 if(!(dest && classname)) return;
409 free(dest->classname);
410 dest->classname = strdup(classname);
412 const char* jsonObjectGetClass(const jsonObject* dest) {
413 if(!dest) return NULL;
414 return dest->classname;
417 jsonObject* jsonObjectClone( const jsonObject* o ) {
418 if(!o) return jsonNewObject(NULL);
425 jsonObject* result = NULL;
429 result = jsonNewObject(NULL);
432 result = jsonNewObject(jsonObjectGetString(o));
435 result = jsonNewNumberObject(jsonObjectGetNumber(o));
438 result = jsonNewBoolObject(jsonBoolIsTrue((jsonObject*) o));
441 arr = jsonNewObject(NULL);
442 arr->type = JSON_ARRAY;
443 for(i=0; i < o->size; i++)
444 jsonObjectPush(arr, jsonObjectClone(jsonObjectGetIndex(o, i)));
448 hash = jsonNewObject(NULL);
449 hash->type = JSON_HASH;
450 itr = jsonNewIterator(o);
451 while( (tmp = jsonIteratorNext(itr)) )
452 jsonObjectSetKey(hash, itr->key, jsonObjectClone(tmp));
453 jsonIteratorFree(itr);
458 jsonObjectSetClass(result, jsonObjectGetClass(o));
462 int jsonBoolIsTrue( const jsonObject* boolObj ) {
463 if( boolObj && boolObj->type == JSON_BOOL && boolObj->value.b )
469 char* jsonObjectToSimpleString( const jsonObject* o ) {
478 if( o->value.n == (int) o->value.n ) {
479 INT_TO_STRING((int) o->value.n);
480 value = strdup(INTSTR);
483 DOUBLE_TO_STRING(o->value.n);
484 value = strdup(DOUBLESTR);
491 value = strdup(o->value.s);