2 * Copyright (c) 2009 Petri Lehtinen <petri@digip.org>
4 * Jansson is free software; you can redistribute it and/or modify
5 * it under the terms of the MIT license. See LICENSE for details.
13 #include "hashtable.h"
14 #include "jansson_private.h"
18 #define container_of(ptr_, type_, member_) \
19 ((type_ *)((char *)ptr_ - (size_t)&((type_ *)0)->member_))
23 hashtable_t hashtable;
48 #define json_to_object(json_) container_of(json_, json_object_t, json)
49 #define json_to_array(json_) container_of(json_, json_array_t, json)
50 #define json_to_string(json_) container_of(json_, json_string_t, json)
51 #define json_to_real(json_) container_of(json_, json_real_t, json)
52 #define json_to_integer(json_) container_of(json_, json_integer_t, json)
54 static inline void json_init(json_t *json, json_type type)
63 static unsigned int hash_string(const void *key)
65 const char *str = (const char *)key;
66 unsigned int hash = 5381;
69 while((c = (unsigned int)*str))
71 hash = ((hash << 5) + hash) + c;
78 static int string_equal(const void *key1, const void *key2)
80 return strcmp((const char *)key1, (const char *)key2) == 0;
83 static void value_decref(void *value)
85 json_decref((json_t *)value);
88 json_t *json_object(void)
90 json_object_t *object = malloc(sizeof(json_object_t));
93 json_init(&object->json, JSON_OBJECT);
95 if(hashtable_init(&object->hashtable, hash_string, string_equal,
101 return &object->json;
104 static void json_delete_object(json_object_t *object)
106 hashtable_close(&object->hashtable);
110 json_t *json_object_get(const json_t *json, const char *key)
112 json_object_t *object;
114 if(!json_is_object(json))
117 object = json_to_object(json);
118 return hashtable_get(&object->hashtable, key);
121 int json_object_set_new_nocheck(json_t *json, const char *key, json_t *value)
123 json_object_t *object;
128 if(!json_is_object(json))
133 object = json_to_object(json);
135 if(hashtable_set(&object->hashtable, strdup(key), value))
144 int json_object_set_nocheck(json_t *json, const char *key, json_t *value)
146 return json_object_set_new_nocheck(json, key, json_incref(value));
149 int json_object_set_new(json_t *json, const char *key, json_t *value)
151 if(!utf8_check_string(key, -1))
157 return json_object_set_new_nocheck(json, key, value);
160 int json_object_del(json_t *json, const char *key)
162 json_object_t *object;
164 if(!json_is_object(json))
167 object = json_to_object(json);
168 return hashtable_del(&object->hashtable, key);
171 void *json_object_iter(json_t *json)
173 json_object_t *object;
175 if(!json_is_object(json))
178 object = json_to_object(json);
179 return hashtable_iter(&object->hashtable);
182 void *json_object_iter_next(json_t *json, void *iter)
184 json_object_t *object;
186 if(!json_is_object(json) || iter == NULL)
189 object = json_to_object(json);
190 return hashtable_iter_next(&object->hashtable, iter);
193 const char *json_object_iter_key(void *iter)
198 return (const char *)hashtable_iter_key(iter);
201 json_t *json_object_iter_value(void *iter)
206 return (json_t *)hashtable_iter_value(iter);
212 json_t *json_array(void)
214 json_array_t *array = malloc(sizeof(json_array_t));
217 json_init(&array->json, JSON_ARRAY);
226 static void json_delete_array(json_array_t *array)
230 for(i = 0; i < array->entries; i++)
231 json_decref(array->table[i]);
237 unsigned int json_array_size(const json_t *json)
239 if(!json_is_array(json))
242 return json_to_array(json)->entries;
245 json_t *json_array_get(const json_t *json, unsigned int index)
248 if(!json_is_array(json))
250 array = json_to_array(json);
252 if(index >= array->entries)
255 return array->table[index];
258 int json_array_set_new(json_t *json, unsigned int index, json_t *value)
265 if(!json_is_array(json))
270 array = json_to_array(json);
272 if(index >= array->entries)
278 json_decref(array->table[index]);
279 array->table[index] = value;
284 int json_array_append_new(json_t *json, json_t *value)
291 if(!json_is_array(json))
296 array = json_to_array(json);
298 if(array->entries == array->size) {
299 array->size = max(8, array->size * 2);
300 array->table = realloc(array->table, array->size * sizeof(json_t *));
308 array->table[array->entries] = value;
317 json_t *json_string_nocheck(const char *value)
319 json_string_t *string;
324 string = malloc(sizeof(json_string_t));
327 json_init(&string->json, JSON_STRING);
329 string->value = strdup(value);
335 return &string->json;
338 json_t *json_string(const char *value)
340 if(!value || !utf8_check_string(value, -1))
343 return json_string_nocheck(value);
346 const char *json_string_value(const json_t *json)
348 if(!json_is_string(json))
351 return json_to_string(json)->value;
354 static void json_delete_string(json_string_t *string)
363 json_t *json_integer(int value)
365 json_integer_t *integer = malloc(sizeof(json_integer_t));
368 json_init(&integer->json, JSON_INTEGER);
370 integer->value = value;
371 return &integer->json;
374 int json_integer_value(const json_t *json)
376 if(!json_is_integer(json))
379 return json_to_integer(json)->value;
382 static void json_delete_integer(json_integer_t *integer)
390 json_t *json_real(double value)
392 json_real_t *real = malloc(sizeof(json_real_t));
395 json_init(&real->json, JSON_REAL);
401 double json_real_value(const json_t *json)
403 if(!json_is_real(json))
406 return json_to_real(json)->value;
409 static void json_delete_real (json_real_t *real)
417 double json_number_value(const json_t *json)
419 if(json_is_integer(json))
420 return json_integer_value(json);
421 else if(json_is_real(json))
422 return json_real_value(json);
428 /*** simple values ***/
430 json_t *json_true(void)
432 static json_t the_true = {
436 return json_incref(&the_true);
440 json_t *json_false(void)
442 static json_t the_false = {
446 return json_incref(&the_false);
450 json_t *json_null(void)
452 static json_t the_null = {
456 return json_incref(&the_null);
462 void json_delete(json_t *json)
464 if(json_is_object(json))
465 json_delete_object(json_to_object(json));
467 else if(json_is_array(json))
468 json_delete_array(json_to_array(json));
470 else if(json_is_string(json))
471 json_delete_string(json_to_string(json));
473 else if(json_is_integer(json))
474 json_delete_integer(json_to_integer(json));
476 else if(json_is_real(json))
477 json_delete_real(json_to_real(json));
479 /* json_delete is not called for true, false or null */