2 * $Id: json_object.c,v 1.17 2006/07/25 03:24:50 mclark Exp $
4 * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
5 * Michael Clark <michael@metaparadigm.com>
6 * Copyright (c) 2009 Hewlett-Packard Development Company, L.P.
8 * This library is free software; you can redistribute it and/or modify
9 * it under the terms of the MIT license. See COPYING for details.
23 #include "arraylist.h"
24 #include "json_inttypes.h"
25 #include "json_object.h"
26 #include "json_object_private.h"
27 #include "json_util.h"
30 char* strndup(const char* str, size_t n);
31 #endif /* !HAVE_STRNDUP */
33 // Don't define this. It's not thread-safe.
34 /* #define REFCOUNT_DEBUG 1 */
36 const char *json_number_chars = "0123456789.+-eE";
37 const char *json_hex_chars = "0123456789abcdefABCDEF";
39 static void json_object_generic_delete(struct json_object* jso);
40 static struct json_object* json_object_new(enum json_type o_type);
43 /* ref count debugging */
47 static struct lh_table *json_object_table;
49 static void json_object_init(void) __attribute__ ((constructor));
50 static void json_object_init(void) {
51 MC_DEBUG("json_object_init: creating object table\n");
52 json_object_table = lh_kptr_table_new(128, "json_object_table", NULL);
55 static void json_object_fini(void) __attribute__ ((destructor));
56 static void json_object_fini(void) {
59 if (json_object_table->count) {
60 MC_DEBUG("json_object_fini: %d referenced objects at exit\n",
61 json_object_table->count);
62 lh_foreach(json_object_table, ent) {
63 struct json_object* obj = (struct json_object*)ent->v;
64 MC_DEBUG("\t%s:%p\n", json_type_to_name(obj->o_type), obj);
68 MC_DEBUG("json_object_fini: freeing object table\n");
69 lh_table_free(json_object_table);
71 #endif /* REFCOUNT_DEBUG */
76 static int json_escape_str(struct printbuf *pb, char *str, int len)
78 int pos = 0, start_offset = 0;
90 if(pos - start_offset > 0)
91 printbuf_memappend(pb, str + start_offset, pos - start_offset);
92 if(c == '\b') printbuf_memappend(pb, "\\b", 2);
93 else if(c == '\n') printbuf_memappend(pb, "\\n", 2);
94 else if(c == '\r') printbuf_memappend(pb, "\\r", 2);
95 else if(c == '\t') printbuf_memappend(pb, "\\t", 2);
96 else if(c == '"') printbuf_memappend(pb, "\\\"", 2);
97 else if(c == '\\') printbuf_memappend(pb, "\\\\", 2);
98 else if(c == '/') printbuf_memappend(pb, "\\/", 2);
103 if(pos - start_offset > 0)
104 printbuf_memappend(pb, str + start_offset, pos - start_offset);
105 sprintbuf(pb, "\\u00%c%c",
106 json_hex_chars[c >> 4],
107 json_hex_chars[c & 0xf]);
108 start_offset = ++pos;
112 if(pos - start_offset > 0)
113 printbuf_memappend(pb, str + start_offset, pos - start_offset);
118 /* reference counting */
120 extern struct json_object* json_object_get(struct json_object *jso)
128 extern void json_object_put(struct json_object *jso)
132 if(!jso->_ref_count) jso->_delete(jso);
137 /* generic object construction and destruction parts */
139 static void json_object_generic_delete(struct json_object* jso)
141 #ifdef REFCOUNT_DEBUG
142 MC_DEBUG("json_object_delete_%s: %p\n",
143 json_type_to_name(jso->o_type), jso);
144 lh_table_delete(json_object_table, jso);
145 #endif /* REFCOUNT_DEBUG */
146 printbuf_free(jso->_pb);
150 static struct json_object* json_object_new(enum json_type o_type)
152 struct json_object *jso;
154 jso = (struct json_object*)calloc(sizeof(struct json_object), 1);
155 if(!jso) return NULL;
156 jso->o_type = o_type;
158 jso->_delete = &json_object_generic_delete;
159 #ifdef REFCOUNT_DEBUG
160 lh_table_insert(json_object_table, jso, jso);
161 MC_DEBUG("json_object_new_%s: %p\n", json_type_to_name(jso->o_type), jso);
162 #endif /* REFCOUNT_DEBUG */
167 /* type checking functions */
169 int json_object_is_type(struct json_object *jso, enum json_type type)
172 return (type == json_type_null);
173 return (jso->o_type == type);
176 enum json_type json_object_get_type(struct json_object *jso)
179 return json_type_null;
183 /* extended conversion to string */
185 const char* json_object_to_json_string_ext(struct json_object *jso, int flags)
190 if ((!jso->_pb) && !(jso->_pb = printbuf_new()))
193 printbuf_reset(jso->_pb);
195 if(jso->_to_json_string(jso, jso->_pb, 0, flags) < 0)
198 return jso->_pb->buf;
201 /* backwards-compatible conversion to string */
203 const char* json_object_to_json_string(struct json_object *jso)
205 return json_object_to_json_string_ext(jso, JSON_C_TO_STRING_SPACED);
208 static void indent(struct printbuf *pb, int level, int flags)
210 if (flags & JSON_C_TO_STRING_PRETTY)
212 printbuf_memset(pb, -1, ' ', level * 2);
216 /* json_object_object */
218 static int json_object_object_to_json_string(struct json_object* jso,
223 int had_children = 0;
224 struct json_object_iter iter;
226 sprintbuf(pb, "{" /*}*/);
227 if (flags & JSON_C_TO_STRING_PRETTY)
229 json_object_object_foreachC(jso, iter)
234 if (flags & JSON_C_TO_STRING_PRETTY)
238 if (flags & JSON_C_TO_STRING_SPACED)
240 indent(pb, level+1, flags);
242 json_escape_str(pb, iter.key, strlen(iter.key));
243 if (flags & JSON_C_TO_STRING_SPACED)
244 sprintbuf(pb, "\": ");
246 sprintbuf(pb, "\":");
248 sprintbuf(pb, "null");
250 iter.val->_to_json_string(iter.val, pb, level+1,flags);
252 if (flags & JSON_C_TO_STRING_PRETTY)
256 indent(pb,level,flags);
258 if (flags & JSON_C_TO_STRING_SPACED)
259 return sprintbuf(pb, /*{*/ " }");
261 return sprintbuf(pb, /*{*/ "}");
265 static void json_object_lh_entry_free(struct lh_entry *ent)
268 json_object_put((struct json_object*)ent->v);
271 static void json_object_object_delete(struct json_object* jso)
273 lh_table_free(jso->o.c_object);
274 json_object_generic_delete(jso);
277 struct json_object* json_object_new_object(void)
279 struct json_object *jso = json_object_new(json_type_object);
280 if(!jso) return NULL;
281 jso->_delete = &json_object_object_delete;
282 jso->_to_json_string = &json_object_object_to_json_string;
283 jso->o.c_object = lh_kchar_table_new(JSON_OBJECT_DEF_HASH_ENTRIES,
284 NULL, &json_object_lh_entry_free);
288 struct lh_table* json_object_get_object(struct json_object *jso)
290 if(!jso) return NULL;
291 switch(jso->o_type) {
292 case json_type_object:
293 return jso->o.c_object;
299 void json_object_object_add(struct json_object* jso, const char *key,
300 struct json_object *val)
302 lh_table_delete(jso->o.c_object, key);
303 lh_table_insert(jso->o.c_object, strdup(key), val);
306 struct json_object* json_object_object_get(struct json_object* jso, const char *key)
308 struct json_object *result;
309 json_object_object_get_ex(jso, key, &result);
313 json_bool json_object_object_get_ex(struct json_object* jso, const char *key, struct json_object **value)
315 if (NULL == jso) return FALSE;
317 switch(jso->o_type) {
318 case json_type_object:
319 return lh_table_lookup_ex(jso->o.c_object, (void*)key, (void**)value);
328 void json_object_object_del(struct json_object* jso, const char *key)
330 lh_table_delete(jso->o.c_object, key);
334 /* json_object_boolean */
336 static int json_object_boolean_to_json_string(struct json_object* jso,
341 if(jso->o.c_boolean) return sprintbuf(pb, "true");
342 else return sprintbuf(pb, "false");
345 struct json_object* json_object_new_boolean(json_bool b)
347 struct json_object *jso = json_object_new(json_type_boolean);
348 if(!jso) return NULL;
349 jso->_to_json_string = &json_object_boolean_to_json_string;
350 jso->o.c_boolean = b;
354 json_bool json_object_get_boolean(struct json_object *jso)
356 if(!jso) return FALSE;
357 switch(jso->o_type) {
358 case json_type_boolean:
359 return jso->o.c_boolean;
361 return (jso->o.c_int64 != 0);
362 case json_type_double:
363 return (jso->o.c_double != 0);
364 case json_type_string:
365 return (jso->o.c_string.len != 0);
372 /* json_object_int */
374 static int json_object_int_to_json_string(struct json_object* jso,
379 return sprintbuf(pb, "%"PRId64, jso->o.c_int64);
382 struct json_object* json_object_new_int(int32_t i)
384 struct json_object *jso = json_object_new(json_type_int);
385 if(!jso) return NULL;
386 jso->_to_json_string = &json_object_int_to_json_string;
391 int32_t json_object_get_int(struct json_object *jso)
394 enum json_type o_type;
398 o_type = jso->o_type;
399 cint64 = jso->o.c_int64;
401 if (o_type == json_type_string)
404 * Parse strings into 64-bit numbers, then use the
405 * 64-to-32-bit number handling below.
407 if (json_parse_int64(jso->o.c_string.str, &cint64) != 0)
408 return 0; /* whoops, it didn't work. */
409 o_type = json_type_int;
414 /* Make sure we return the correct values for out of range numbers. */
415 if (cint64 <= INT32_MIN)
417 else if (cint64 >= INT32_MAX)
420 return (int32_t)cint64;
421 case json_type_double:
422 return (int32_t)jso->o.c_double;
423 case json_type_boolean:
424 return jso->o.c_boolean;
430 struct json_object* json_object_new_int64(int64_t i)
432 struct json_object *jso = json_object_new(json_type_int);
433 if(!jso) return NULL;
434 jso->_to_json_string = &json_object_int_to_json_string;
439 int64_t json_object_get_int64(struct json_object *jso)
444 switch(jso->o_type) {
446 return jso->o.c_int64;
447 case json_type_double:
448 return (int64_t)jso->o.c_double;
449 case json_type_boolean:
450 return jso->o.c_boolean;
451 case json_type_string:
452 if (json_parse_int64(jso->o.c_string.str, &cint) == 0) return cint;
459 /* json_object_double */
461 static int json_object_double_to_json_string(struct json_object* jso,
466 return sprintbuf(pb, "%f", jso->o.c_double);
469 struct json_object* json_object_new_double(double d)
471 struct json_object *jso = json_object_new(json_type_double);
472 if(!jso) return NULL;
473 jso->_to_json_string = &json_object_double_to_json_string;
478 double json_object_get_double(struct json_object *jso)
483 switch(jso->o_type) {
484 case json_type_double:
485 return jso->o.c_double;
487 return jso->o.c_int64;
488 case json_type_boolean:
489 return jso->o.c_boolean;
490 case json_type_string:
491 if(sscanf(jso->o.c_string.str, "%lf", &cdouble) == 1) return cdouble;
498 /* json_object_string */
500 static int json_object_string_to_json_string(struct json_object* jso,
506 json_escape_str(pb, jso->o.c_string.str, jso->o.c_string.len);
511 static void json_object_string_delete(struct json_object* jso)
513 free(jso->o.c_string.str);
514 json_object_generic_delete(jso);
517 struct json_object* json_object_new_string(const char *s)
519 struct json_object *jso = json_object_new(json_type_string);
520 if(!jso) return NULL;
521 jso->_delete = &json_object_string_delete;
522 jso->_to_json_string = &json_object_string_to_json_string;
523 jso->o.c_string.str = strdup(s);
524 jso->o.c_string.len = strlen(s);
528 struct json_object* json_object_new_string_len(const char *s, int len)
530 struct json_object *jso = json_object_new(json_type_string);
531 if(!jso) return NULL;
532 jso->_delete = &json_object_string_delete;
533 jso->_to_json_string = &json_object_string_to_json_string;
534 jso->o.c_string.str = malloc(len);
535 memcpy(jso->o.c_string.str, (void *)s, len);
536 jso->o.c_string.len = len;
540 const char* json_object_get_string(struct json_object *jso)
542 if(!jso) return NULL;
543 switch(jso->o_type) {
544 case json_type_string:
545 return jso->o.c_string.str;
547 return json_object_to_json_string(jso);
551 int json_object_get_string_len(struct json_object *jso) {
553 switch(jso->o_type) {
554 case json_type_string:
555 return jso->o.c_string.len;
562 /* json_object_array */
564 static int json_object_array_to_json_string(struct json_object* jso,
569 int had_children = 0;
572 if (flags & JSON_C_TO_STRING_PRETTY)
574 for(ii=0; ii < json_object_array_length(jso); ii++)
576 struct json_object *val;
580 if (flags & JSON_C_TO_STRING_PRETTY)
584 if (flags & JSON_C_TO_STRING_SPACED)
586 indent(pb, level + 1, flags);
587 val = json_object_array_get_idx(jso, ii);
589 sprintbuf(pb, "null");
591 val->_to_json_string(val, pb, level+1, flags);
593 if (flags & JSON_C_TO_STRING_PRETTY)
597 indent(pb,level,flags);
600 if (flags & JSON_C_TO_STRING_SPACED)
601 return sprintbuf(pb, " ]");
603 return sprintbuf(pb, "]");
606 static void json_object_array_entry_free(void *data)
608 json_object_put((struct json_object*)data);
611 static void json_object_array_delete(struct json_object* jso)
613 array_list_free(jso->o.c_array);
614 json_object_generic_delete(jso);
617 struct json_object* json_object_new_array(void)
619 struct json_object *jso = json_object_new(json_type_array);
620 if(!jso) return NULL;
621 jso->_delete = &json_object_array_delete;
622 jso->_to_json_string = &json_object_array_to_json_string;
623 jso->o.c_array = array_list_new(&json_object_array_entry_free);
627 struct array_list* json_object_get_array(struct json_object *jso)
629 if(!jso) return NULL;
630 switch(jso->o_type) {
631 case json_type_array:
632 return jso->o.c_array;
638 void json_object_array_sort(struct json_object *jso, int(*sort_fn)(const void *, const void *))
640 array_list_sort(jso->o.c_array, sort_fn);
643 int json_object_array_length(struct json_object *jso)
645 return array_list_length(jso->o.c_array);
648 int json_object_array_add(struct json_object *jso,struct json_object *val)
650 return array_list_add(jso->o.c_array, val);
653 int json_object_array_put_idx(struct json_object *jso, int idx,
654 struct json_object *val)
656 return array_list_put_idx(jso->o.c_array, idx, val);
659 struct json_object* json_object_array_get_idx(struct json_object *jso,
662 return (struct json_object*)array_list_get_idx(jso->o.c_array, idx);