/*
- * Copyright (c) 2009 Petri Lehtinen <petri@digip.org>
+ * Copyright (c) 2009
-2011 Petri Lehtinen <petri@digip.org>
*
* Jansson is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#define _GNU_SOURCE
+
+#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "hashtable.h"
#include "jansson_private.h"
#include "utf.h"
-#include "util.h"
-
-#define container_of(ptr_, type_, member_) \
- ((type_ *)((char *)ptr_ - (size_t)&((type_ *)0)->member_))
-
-typedef struct {
- json_t json;
- hashtable_t hashtable;
-} json_object_t;
-
-typedef struct {
- json_t json;
- unsigned int size;
- unsigned int entries;
- json_t **table;
-} json_array_t;
-
-typedef struct {
- json_t json;
- char *value;
-} json_string_t;
-
-typedef struct {
- json_t json;
- double value;
-} json_real_t;
-
-typedef struct {
- json_t json;
- int value;
-} json_integer_t;
-
-#define json_to_object(json_) container_of(json_, json_object_t, json)
-#define json_to_array(json_) container_of(json_, json_array_t, json)
-#define json_to_string(json_) container_of(json_, json_string_t, json)
-#define json_to_real(json_) container_of(json_, json_real_t, json)
-#define json_to_integer(json_) container_of(json_, json_integer_t, json)
-
-static inline void json_init(json_t *json, json_type type)
+
+
+static JSON_INLINE void json_init(json_t *json, json_type type)
{
json->type = type;
json->refcount = 1;
/*** object ***/
-static unsigned int hash_string(const void *key)
+/* This macro just returns a pointer that's a few bytes backwards from
+ string. This makes it possible to pass a pointer to object_key_t
+ when only the string inside it is used, without actually creating
+ an object_key_t instance. */
+#define string_to_key(string) container_of(string, object_key_t, key)
+
+static size_t hash_key(const void *ptr)
{
- const char *str = (const char *)key;
- unsigned int hash = 5381;
- unsigned int c;
+ const char *str = ((const object_key_t *)ptr)->key;
+
+ size_t hash = 5381;
+ size_t c;
- while((c = (unsigned int)*str))
+ while((c = (size_t)*str))
{
hash = ((hash << 5) + hash) + c;
str++;
return hash;
}
-static int string_equal(const void *key1, const void *key2)
+static int key_equal(const void *ptr1, const void *ptr2)
{
- return strcmp((const char *)key1, (const char *)key2) == 0;
+ return strcmp(((const object_key_t *)ptr1)->key,
+ ((const object_key_t *)ptr2)->key) == 0;
}
static void value_decref(void *value)
return NULL;
json_init(&object->json, JSON_OBJECT);
- if(hashtable_init(&object->hashtable, hash_string, string_equal,
+ if(hashtable_init(&object->hashtable, hash_key, key_equal,
free, value_decref))
{
free(object);
return NULL;
}
+
+ object->serial = 0;
+ object->visited = 0;
+
return &object->json;
}
free(object);
}
+size_t json_object_size(const json_t *json)
+{
+ json_object_t *object;
+
+ if(!json_is_object(json))
+ return -1;
+
+ object = json_to_object(json);
+ return object->hashtable.size;
+}
+
json_t *json_object_get(const json_t *json, const char *key)
{
json_object_t *object;
return NULL;
object = json_to_object(json);
- return hashtable_get(&object->hashtable, key);
+ return hashtable_get(&object->hashtable, string_to_key(key));
}
-int json_object_set_nocheck(json_t *json, const char *key, json_t *value)
+int json_object_set_new_nocheck(json_t *json, const char *key, json_t *value)
{
json_object_t *object;
+ object_key_t *k;
- if(!json_is_object(json))
+ if(!key || !value)
return -1;
+ if(!json_is_object(json) || json == value)
+ {
+ json_decref(value);
+ return -1;
+ }
object = json_to_object(json);
- return hashtable_set(&object->hashtable, strdup(key), json_incref(value));
+
+ /* offsetof(...) returns the size of object_key_t without the
+ last, flexible member. This way, the correct amount is
+ allocated. */
+ k = malloc(offsetof(object_key_t, key) +
+ strlen(key) + 1); if(!k) return -1;
+
+ k->serial = object->serial++;
+ strcpy(k->key, key);
+
+ if(hashtable_set(&object->hashtable, k, value))
+ {
+ json_decref(value);
+ return -1;
+ }
+
+ return 0;
}
-int json_object_set(json_t *json, const char *key, json_t *value)
+int json_object_set_new(json_t *json, const char *key, json_t *value)
{
- if(!utf8_check_string(key, -1))
+ if(!key || !utf8_check_string(key, -1))
+ {
+ json_decref(value);
return -1;
+ }
- return json_object_set_nocheck(json, key, value);
+ return json_object_set_new_nocheck(json, key, value);
}
int json_object_del(json_t *json, const char *key)
return -1;
object = json_to_object(json);
- return hashtable_del(&object->hashtable, key);
+ return hashtable_del(&object->hashtable, string_to_key(key));
+}
+
+int json_object_clear(json_t *json)
+{
+ json_object_t *object;
+
+ if(!json_is_object(json))
+ return -1;
+
+ object = json_to_object(json);
+ hashtable_clear(&object->hashtable);
+
+ return 0;
+}
+
+int json_object_update(json_t *object, json_t *other)
+{
+ void *iter;
+
+ if(!json_is_object(object) || !json_is_object(other))
+ return -1;
+
+ iter = json_object_iter(other);
+ while(iter) {
+ const char *key;
+ json_t *value;
+
+ key = json_object_iter_key(iter);
+ value = json_object_iter_value(iter);
+
+ if(json_object_set_nocheck(object, key, value))
+ return -1;
+
+ iter = json_object_iter_next(other, iter);
+ }
+
+ return 0;
}
void *json_object_iter(json_t *json)
return hashtable_iter(&object->hashtable);
}
+void *json_object_iter_at(json_t *json, const char *key)
+{
+ json_object_t *object;
+
+ if(!key || !json_is_object(json))
+ return NULL;
+
+ object = json_to_object(json);
+ return hashtable_iter_at(&object->hashtable, string_to_key(key));
+}
+
void *json_object_iter_next(json_t *json, void *iter)
{
json_object_t *object;
return hashtable_iter_next(&object->hashtable, iter);
}
+const object_key_t *jsonp_object_iter_fullkey(void *iter)
+{
+ if(!iter)
+ return NULL;
+
+ return hashtable_iter_key(iter);
+}
+
const char *json_object_iter_key(void *iter)
{
if(!iter)
return NULL;
- return (const char *)hashtable_iter_key(iter);
+ return jsonp_object_iter_fullkey(iter)->key;
}
json_t *json_object_iter_value(void *iter)
return (json_t *)hashtable_iter_value(iter);
}
+int json_object_iter_set_new(json_t *json, void *iter, json_t *value)
+{
+ json_object_t *object;
+
+ if(!json_is_object(json) || !iter || !value)
+ return -1;
+
+ object = json_to_object(json);
+ hashtable_iter_set(&object->hashtable, iter, value);
+
+ return 0;
+}
+
+static int json_object_equal(json_t *object1, json_t *object2)
+{
+ void *iter;
+
+ if(json_object_size(object1) != json_object_size(object2))
+ return 0;
+
+ iter = json_object_iter(object1);
+ while(iter)
+ {
+ const char *key;
+ json_t *value1, *value2;
+
+ key = json_object_iter_key(iter);
+ value1 = json_object_iter_value(iter);
+ value2 = json_object_get(object2, key);
+
+ if(!json_equal(value1, value2))
+ return 0;
+
+ iter = json_object_iter_next(object1, iter);
+ }
+
+ return 1;
+}
+
+static json_t *json_object_copy(json_t *object)
+{
+ json_t *result;
+ void *iter;
+
+ result = json_object();
+ if(!result)
+ return NULL;
+
+ iter = json_object_iter(object);
+ while(iter)
+ {
+ const char *key;
+ json_t *value;
+
+ key = json_object_iter_key(iter);
+ value = json_object_iter_value(iter);
+ json_object_set_nocheck(result, key, value);
+
+ iter = json_object_iter_next(object, iter);
+ }
+
+ return result;
+}
+
+static json_t *json_object_deep_copy(json_t *object)
+{
+ json_t *result;
+ void *iter;
+
+ result = json_object();
+ if(!result)
+ return NULL;
+
+ iter = json_object_iter(object);
+ while(iter)
+ {
+ const char *key;
+ json_t *value;
+
+ key = json_object_iter_key(iter);
+ value = json_object_iter_value(iter);
+ json_object_set_new_nocheck(result, key, json_deep_copy(value));
+
+ iter = json_object_iter_next(object, iter);
+ }
+
+ return result;
+}
+
/*** array ***/
{
json_array_t *array = malloc(sizeof(json_array_t));
if(!array)
- return NULL;
+ return NULL;
json_init(&array->json, JSON_ARRAY);
array->entries = 0;
- array->size = 0;
- array->table = NULL;
+ array->size = 8;
+
+ array->table = malloc(array->size * sizeof(json_t *));
+ if(!array->table) {
+ free(array);
+ return NULL;
+ }
+
+ array->visited = 0;
return &array->json;
}
static void json_delete_array(json_array_t *array)
{
- unsigned int i;
+ size_t i;
for(i = 0; i < array->entries; i++)
json_decref(array->table[i]);
free(array);
}
-unsigned int json_array_size(const json_t *json)
+size_t json_array_size(const json_t *json)
{
if(!json_is_array(json))
return 0;
return json_to_array(json)->entries;
}
-json_t *json_array_get(const json_t *json, unsigned int index)
+json_t *json_array_get(const json_t *json, size_t index)
{
json_array_t *array;
if(!json_is_array(json))
return array->table[index];
}
-int json_array_set(json_t *json, unsigned int index, json_t *value)
+int json_array_set_new(json_t *json, size_t index, json_t *value)
{
json_array_t *array;
- if(!json_is_array(json))
+
+ if(!value)
return -1;
+
+ if(!json_is_array(json) || json == value)
+ {
+ json_decref(value);
+ return -1;
+ }
array = json_to_array(json);
if(index >= array->entries)
+ {
+ json_decref(value);
return -1;
+ }
json_decref(array->table[index]);
- array->table[index] = json_incref(value);
+ array->table[index] = value;
return 0;
}
-int json_array_append(json_t *json, json_t *value)
+static void array_move(json_array_t *array, size_t dest,
+ size_t src, size_t count)
+{
+ memmove(&array->table[dest], &array->table[src], count * sizeof(json_t *));
+}
+
+static void array_copy(json_t **dest, size_t dpos,
+ json_t **src, size_t spos,
+ size_t count)
+{
+ memcpy(&dest[dpos], &src[spos], count * sizeof(json_t *));
+}
+
+static json_t **json_array_grow(json_array_t *array,
+ size_t amount,
+ int copy)
+{
+ size_t new_size;
+ json_t **old_table, **new_table;
+
+ if(array->entries + amount <= array->size)
+ return array->table;
+
+ old_table = array->table;
+
+ new_size = max(array->size + amount, array->size * 2);
+ new_table = malloc(new_size * sizeof(json_t *));
+ if(!new_table)
+ return NULL;
+
+ array->size = new_size;
+ array->table = new_table;
+
+ if(copy) {
+ array_copy(array->table, 0, old_table, 0, array->entries);
+ free(old_table);
+ return array->table;
+ }
+
+ return old_table;
+}
+
+int json_array_append_new(json_t *json, json_t *value)
{
json_array_t *array;
- if(!json_is_array(json))
+
+ if(!value)
+ return -1;
+
+ if(!json_is_array(json) || json == value)
+ {
+ json_decref(value);
return -1;
+ }
array = json_to_array(json);
- if(array->entries == array->size) {
- array->size = max(8, array->size * 2);
- array->table = realloc(array->table, array->size * sizeof(json_t *));
- if(!array->table)
- return -1;
+ if(!json_array_grow(array, 1, 1)) {
+ json_decref(value);
+ return -1;
}
- array->table[array->entries] = json_incref(value);
+ array->table[array->entries] = value;
array->entries++;
return 0;
}
+int json_array_insert_new(json_t *json, size_t index, json_t *value)
+{
+ json_array_t *array;
+ json_t **old_table;
+
+ if(!value)
+ return -1;
+
+ if(!json_is_array(json) || json == value) {
+ json_decref(value);
+ return -1;
+ }
+ array = json_to_array(json);
+
+ if(index > array->entries) {
+ json_decref(value);
+ return -1;
+ }
+
+ old_table = json_array_grow(array, 1, 0);
+ if(!old_table) {
+ json_decref(value);
+ return -1;
+ }
+
+ if(old_table != array->table) {
+ array_copy(array->table, 0, old_table, 0, index);
+ array_copy(array->table, index + 1, old_table, index,
+ array->entries - index);
+ free(old_table);
+ }
+ else
+ array_move(array, index + 1, index, array->entries - index);
+
+ array->table[index] = value;
+ array->entries++;
+
+ return 0;
+}
+
+int json_array_remove(json_t *json, size_t index)
+{
+ json_array_t *array;
+
+ if(!json_is_array(json))
+ return -1;
+ array = json_to_array(json);
+
+ if(index >= array->entries)
+ return -1;
+
+ json_decref(array->table[index]);
+
+ array_move(array, index, index + 1, array->entries - index);
+ array->entries--;
+
+ return 0;
+}
+
+int json_array_clear(json_t *json)
+{
+ json_array_t *array;
+ size_t i;
+
+ if(!json_is_array(json))
+ return -1;
+ array = json_to_array(json);
+
+ for(i = 0; i < array->entries; i++)
+ json_decref(array->table[i]);
+
+ array->entries = 0;
+ return 0;
+}
+
+int json_array_extend(json_t *json, json_t *other_json)
+{
+ json_array_t *array, *other;
+ size_t i;
+
+ if(!json_is_array(json) || !json_is_array(other_json))
+ return -1;
+ array = json_to_array(json);
+ other = json_to_array(other_json);
+
+ if(!json_array_grow(array, other->entries, 1))
+ return -1;
+
+ for(i = 0; i < other->entries; i++)
+ json_incref(other->table[i]);
+
+ array_copy(array->table, array->entries, other->table, 0, other->entries);
+
+ array->entries += other->entries;
+ return 0;
+}
+
+static int json_array_equal(json_t *array1, json_t *array2)
+{
+ size_t i, size;
+
+ size = json_array_size(array1);
+ if(size != json_array_size(array2))
+ return 0;
+
+ for(i = 0; i < size; i++)
+ {
+ json_t *value1, *value2;
+
+ value1 = json_array_get(array1, i);
+ value2 = json_array_get(array2, i);
+
+ if(!json_equal(value1, value2))
+ return 0;
+ }
+
+ return 1;
+}
+
+static json_t *json_array_copy(json_t *array)
+{
+ json_t *result;
+ size_t i;
+
+ result = json_array();
+ if(!result)
+ return NULL;
+
+ for(i = 0; i < json_array_size(array); i++)
+ json_array_append(result, json_array_get(array, i));
+
+ return result;
+}
+
+static json_t *json_array_deep_copy(json_t *array)
+{
+ json_t *result;
+ size_t i;
+
+ result = json_array();
+ if(!result)
+ return NULL;
+
+ for(i = 0; i < json_array_size(array); i++)
+ json_array_append_new(result, json_deep_copy(json_array_get(array, i)));
+
+ return result;
+}
/*** string ***/
json_t *json_string_nocheck(const char *value)
{
- json_string_t *string = malloc(sizeof(json_string_t));
+ json_string_t *string;
+
+ if(!value)
+ return NULL;
+
+ string = malloc(sizeof(json_string_t));
if(!string)
- return NULL;
+ return NULL;
json_init(&string->json, JSON_STRING);
string->value = strdup(value);
+ if(!string->value) {
+ free(string);
+ return NULL;
+ }
+
return &string->json;
}
json_t *json_string(const char *value)
{
- if(!utf8_check_string(value, -1))
+ if(!value || !utf8_check_string(value, -1))
return NULL;
return json_string_nocheck(value);
return json_to_string(json)->value;
}
+int json_string_set_nocheck(json_t *json, const char *value)
+{
+ char *dup;
+ json_string_t *string;
+
+ dup = strdup(value);
+ if(!dup)
+ return -1;
+
+ string = json_to_string(json);
+ free(string->value);
+ string->value = dup;
+
+ return 0;
+}
+
+int json_string_set(json_t *json, const char *value)
+{
+ if(!value || !utf8_check_string(value, -1))
+ return -1;
+
+ return json_string_set_nocheck(json, value);
+}
+
static void json_delete_string(json_string_t *string)
{
free(string->value);
free(string);
}
+static int json_string_equal(json_t *string1, json_t *string2)
+{
+ return strcmp(json_string_value(string1), json_string_value(string2)) == 0;
+}
+
+static json_t *json_string_copy(json_t *string)
+{
+ return json_string_nocheck(json_string_value(string));
+}
+
/*** integer ***/
-json_t *json_integer(int value)
+json_t *json_integer(json_int_t value)
{
json_integer_t *integer = malloc(sizeof(json_integer_t));
if(!integer)
- return NULL;
+ return NULL;
json_init(&integer->json, JSON_INTEGER);
integer->value = value;
return &integer->json;
}
-int json_integer_value(const json_t *json)
+json_int_t json_integer_value(const json_t *json)
{
if(!json_is_integer(json))
return 0;
return json_to_integer(json)->value;
}
+int json_integer_set(json_t *json, json_int_t value)
+{
+ if(!json_is_integer(json))
+ return -1;
+
+ json_to_integer(json)->value = value;
+
+ return 0;
+}
+
static void json_delete_integer(json_integer_t *integer)
{
free(integer);
}
+static int json_integer_equal(json_t *integer1, json_t *integer2)
+{
+ return json_integer_value(integer1) == json_integer_value(integer2);
+}
+
+static json_t *json_integer_copy(json_t *integer)
+{
+ return json_integer(json_integer_value(integer));
+}
+
/*** real ***/
{
json_real_t *real = malloc(sizeof(json_real_t));
if(!real)
- return NULL;
+ return NULL;
json_init(&real->json, JSON_REAL);
real->value = value;
return json_to_real(json)->value;
}
-static void json_delete_real (json_real_t *real)
+int json_real_set(json_t *json, double value)
+{
+ if(!json_is_real(json))
+ return 0;
+
+ json_to_real(json)->value = value;
+
+ return 0;
+}
+
+static void json_delete_real(json_real_t *real)
{
free(real);
}
+static int json_real_equal(json_t *real1, json_t *real2)
+{
+ return json_real_value(real1) == json_real_value(real2);
+}
+
+static json_t *json_real_copy(json_t *real)
+{
+ return json_real(json_real_value(real));
+}
+
/*** number ***/
json_t *json_true(void)
{
- static json_t the_true = {
- .type = JSON_TRUE,
- .refcount = 1
- };
- return json_incref(&the_true);
+ static json_t the_true = {JSON_TRUE, (size_t)-1};
+ return &the_true;
}
json_t *json_false(void)
{
- static json_t the_false = {
- .type = JSON_FALSE,
- .refcount = 1
- };
- return json_incref(&the_false);
+ static json_t the_false = {JSON_FALSE, (size_t)-1};
+ return &the_false;
}
json_t *json_null(void)
{
- static json_t the_null = {
- .type = JSON_NULL,
- .refcount = 1
- };
- return json_incref(&the_null);
+ static json_t the_null = {JSON_NULL, (size_t)-1};
+ return &the_null;
}
/* json_delete is not called for true, false or null */
}
+
+
+/*** equality ***/
+
+int json_equal(json_t *json1, json_t *json2)
+{
+ if(!json1 || !json2)
+ return 0;
+
+ if(json_typeof(json1) != json_typeof(json2))
+ return 0;
+
+ /* this covers true, false and null as they are singletons */
+ if(json1 == json2)
+ return 1;
+
+ if(json_is_object(json1))
+ return json_object_equal(json1, json2);
+
+ if(json_is_array(json1))
+ return json_array_equal(json1, json2);
+
+ if(json_is_string(json1))
+ return json_string_equal(json1, json2);
+
+ if(json_is_integer(json1))
+ return json_integer_equal(json1, json2);
+
+ if(json_is_real(json1))
+ return json_real_equal(json1, json2);
+
+ return 0;
+}
+
+
+/*** copying ***/
+
+json_t *json_copy(json_t *json)
+{
+ if(!json)
+ return NULL;
+
+ if(json_is_object(json))
+ return json_object_copy(json);
+
+ if(json_is_array(json))
+ return json_array_copy(json);
+
+ if(json_is_string(json))
+ return json_string_copy(json);
+
+ if(json_is_integer(json))
+ return json_integer_copy(json);
+
+ if(json_is_real(json))
+ return json_real_copy(json);
+
+ if(json_is_true(json) || json_is_false(json) || json_is_null(json))
+ return json;
+
+ return NULL;
+}
+
+json_t *json_deep_copy(json_t *json)
+{
+ if(!json)
+ return NULL;
+
+ if(json_is_object(json))
+ return json_object_deep_copy(json);
+
+ if(json_is_array(json))
+ return json_array_deep_copy(json);
+
+ /* for the rest of the types, deep copying doesn't differ from
+ shallow copying */
+
+ if(json_is_string(json))
+ return json_string_copy(json);
+
+ if(json_is_integer(json))
+ return json_integer_copy(json);
+
+ if(json_is_real(json))
+ return json_real_copy(json);
+
+ if(json_is_true(json) || json_is_false(json) || json_is_null(json))
+ return json;
+
+ return NULL;
+}
projects / jansson.git / blobdiff