mirror of
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375 lines
13 KiB
C
375 lines
13 KiB
C
/*
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* Copyright (c) 2009-2016 Petri Lehtinen <petri@digip.org>
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*
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* Jansson is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef JANSSON_H
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#define JANSSON_H
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#include <stdio.h>
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#include <stdlib.h> /* for size_t */
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#include <stdarg.h>
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#include "jansson_config.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* version */
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#define JANSSON_MAJOR_VERSION 2
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#define JANSSON_MINOR_VERSION 12
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#define JANSSON_MICRO_VERSION 0
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/* Micro version is omitted if it's 0 */
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#define JANSSON_VERSION "2.12"
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/* Version as a 3-byte hex number, e.g. 0x010201 == 1.2.1. Use this
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for numeric comparisons, e.g. #if JANSSON_VERSION_HEX >= ... */
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#define JANSSON_VERSION_HEX ((JANSSON_MAJOR_VERSION << 16) | \
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(JANSSON_MINOR_VERSION << 8) | \
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(JANSSON_MICRO_VERSION << 0))
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/* If __atomic or __sync builtins are available the library is thread
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* safe for all read-only functions plus reference counting. */
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#if JSON_HAVE_ATOMIC_BUILTINS || JSON_HAVE_SYNC_BUILTINS
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#define JANSSON_THREAD_SAFE_REFCOUNT 1
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#endif
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#if defined(__GNUC__) || defined(__clang__)
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#define JANSSON_ATTRS(...) __attribute__((__VA_ARGS__))
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#else
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#define JANSSON_ATTRS(...)
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#endif
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/* types */
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typedef enum {
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JSON_OBJECT,
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JSON_ARRAY,
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JSON_STRING,
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JSON_INTEGER,
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JSON_REAL,
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JSON_TRUE,
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JSON_FALSE,
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JSON_NULL
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} json_type;
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typedef struct json_t {
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json_type type;
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volatile size_t refcount;
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} json_t;
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#ifndef JANSSON_USING_CMAKE /* disabled if using cmake */
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#if JSON_INTEGER_IS_LONG_LONG
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#ifdef _WIN32
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#define JSON_INTEGER_FORMAT "I64d"
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#else
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#define JSON_INTEGER_FORMAT "lld"
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#endif
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typedef long long json_int_t;
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#else
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#define JSON_INTEGER_FORMAT "ld"
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typedef long json_int_t;
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#endif /* JSON_INTEGER_IS_LONG_LONG */
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#endif
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#define json_typeof(json) ((json)->type)
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#define json_is_object(json) ((json) && json_typeof(json) == JSON_OBJECT)
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#define json_is_array(json) ((json) && json_typeof(json) == JSON_ARRAY)
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#define json_is_string(json) ((json) && json_typeof(json) == JSON_STRING)
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#define json_is_integer(json) ((json) && json_typeof(json) == JSON_INTEGER)
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#define json_is_real(json) ((json) && json_typeof(json) == JSON_REAL)
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#define json_is_number(json) (json_is_integer(json) || json_is_real(json))
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#define json_is_true(json) ((json) && json_typeof(json) == JSON_TRUE)
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#define json_is_false(json) ((json) && json_typeof(json) == JSON_FALSE)
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#define json_boolean_value json_is_true
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#define json_is_boolean(json) (json_is_true(json) || json_is_false(json))
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#define json_is_null(json) ((json) && json_typeof(json) == JSON_NULL)
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/* construction, destruction, reference counting */
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json_t *json_object(void);
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json_t *json_array(void);
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json_t *json_string(const char *value);
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json_t *json_stringn(const char *value, size_t len);
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json_t *json_string_nocheck(const char *value);
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json_t *json_stringn_nocheck(const char *value, size_t len);
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json_t *json_integer(json_int_t value);
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json_t *json_real(double value);
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json_t *json_true(void);
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json_t *json_false(void);
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#define json_boolean(val) ((val) ? json_true() : json_false())
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json_t *json_null(void);
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/* do not call JSON_INTERNAL_INCREF or JSON_INTERNAL_DECREF directly */
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#if JSON_HAVE_ATOMIC_BUILTINS
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#define JSON_INTERNAL_INCREF(json) __atomic_add_fetch(&json->refcount, 1, __ATOMIC_ACQUIRE)
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#define JSON_INTERNAL_DECREF(json) __atomic_sub_fetch(&json->refcount, 1, __ATOMIC_RELEASE)
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#elif JSON_HAVE_SYNC_BUILTINS
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#define JSON_INTERNAL_INCREF(json) __sync_add_and_fetch(&json->refcount, 1)
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#define JSON_INTERNAL_DECREF(json) __sync_sub_and_fetch(&json->refcount, 1)
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#else
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#define JSON_INTERNAL_INCREF(json) (++json->refcount)
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#define JSON_INTERNAL_DECREF(json) (--json->refcount)
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#endif
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static JSON_INLINE
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json_t *json_incref(json_t *json)
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{
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if(json && json->refcount != (size_t)-1)
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JSON_INTERNAL_INCREF(json);
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return json;
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}
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/* do not call json_delete directly */
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void json_delete(json_t *json);
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static JSON_INLINE
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void json_decref(json_t *json)
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{
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if(json && json->refcount != (size_t)-1 && JSON_INTERNAL_DECREF(json) == 0)
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json_delete(json);
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}
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#if defined(__GNUC__) || defined(__clang__)
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static JSON_INLINE
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void json_decrefp(json_t **json)
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{
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if(json) {
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json_decref(*json);
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*json = NULL;
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}
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}
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#define json_auto_t json_t __attribute__((cleanup(json_decrefp)))
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#endif
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/* error reporting */
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#define JSON_ERROR_TEXT_LENGTH 160
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#define JSON_ERROR_SOURCE_LENGTH 80
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typedef struct json_error_t {
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int line;
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int column;
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int position;
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char source[JSON_ERROR_SOURCE_LENGTH];
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char text[JSON_ERROR_TEXT_LENGTH];
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} json_error_t;
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enum json_error_code {
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json_error_unknown,
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json_error_out_of_memory,
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json_error_stack_overflow,
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json_error_cannot_open_file,
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json_error_invalid_argument,
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json_error_invalid_utf8,
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json_error_premature_end_of_input,
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json_error_end_of_input_expected,
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json_error_invalid_syntax,
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json_error_invalid_format,
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json_error_wrong_type,
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json_error_null_character,
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json_error_null_value,
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json_error_null_byte_in_key,
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json_error_duplicate_key,
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json_error_numeric_overflow,
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json_error_item_not_found,
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json_error_index_out_of_range
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};
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static JSON_INLINE enum json_error_code json_error_code(const json_error_t *e) {
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return (enum json_error_code)e->text[JSON_ERROR_TEXT_LENGTH - 1];
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}
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/* getters, setters, manipulation */
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void json_object_seed(size_t seed);
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size_t json_object_size(const json_t *object);
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json_t *json_object_get(const json_t *object, const char *key) JANSSON_ATTRS(warn_unused_result);
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int json_object_set_new(json_t *object, const char *key, json_t *value);
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int json_object_set_new_nocheck(json_t *object, const char *key, json_t *value);
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int json_object_del(json_t *object, const char *key);
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int json_object_clear(json_t *object);
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int json_object_update(json_t *object, json_t *other);
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int json_object_update_existing(json_t *object, json_t *other);
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int json_object_update_missing(json_t *object, json_t *other);
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void *json_object_iter(json_t *object);
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void *json_object_iter_at(json_t *object, const char *key);
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void *json_object_key_to_iter(const char *key);
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void *json_object_iter_next(json_t *object, void *iter);
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const char *json_object_iter_key(void *iter);
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json_t *json_object_iter_value(void *iter);
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int json_object_iter_set_new(json_t *object, void *iter, json_t *value);
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#define json_object_foreach(object, key, value) \
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for(key = json_object_iter_key(json_object_iter(object)); \
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key && (value = json_object_iter_value(json_object_key_to_iter(key))); \
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key = json_object_iter_key(json_object_iter_next(object, json_object_key_to_iter(key))))
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#define json_object_foreach_safe(object, n, key, value) \
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for(key = json_object_iter_key(json_object_iter(object)), \
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n = json_object_iter_next(object, json_object_key_to_iter(key)); \
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key && (value = json_object_iter_value(json_object_key_to_iter(key))); \
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key = json_object_iter_key(n), \
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n = json_object_iter_next(object, json_object_key_to_iter(key)))
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#define json_array_foreach(array, index, value) \
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for(index = 0; \
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index < json_array_size(array) && (value = json_array_get(array, index)); \
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index++)
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static JSON_INLINE
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int json_object_set(json_t *object, const char *key, json_t *value)
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{
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return json_object_set_new(object, key, json_incref(value));
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}
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static JSON_INLINE
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int json_object_set_nocheck(json_t *object, const char *key, json_t *value)
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{
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return json_object_set_new_nocheck(object, key, json_incref(value));
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}
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static JSON_INLINE
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int json_object_iter_set(json_t *object, void *iter, json_t *value)
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{
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return json_object_iter_set_new(object, iter, json_incref(value));
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}
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size_t json_array_size(const json_t *array);
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json_t *json_array_get(const json_t *array, size_t index) JANSSON_ATTRS(warn_unused_result);
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int json_array_set_new(json_t *array, size_t index, json_t *value);
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int json_array_append_new(json_t *array, json_t *value);
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int json_array_insert_new(json_t *array, size_t index, json_t *value);
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int json_array_remove(json_t *array, size_t index);
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int json_array_clear(json_t *array);
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int json_array_extend(json_t *array, json_t *other);
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static JSON_INLINE
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int json_array_set(json_t *array, size_t ind, json_t *value)
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{
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return json_array_set_new(array, ind, json_incref(value));
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}
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static JSON_INLINE
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int json_array_append(json_t *array, json_t *value)
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{
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return json_array_append_new(array, json_incref(value));
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}
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static JSON_INLINE
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int json_array_insert(json_t *array, size_t ind, json_t *value)
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{
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return json_array_insert_new(array, ind, json_incref(value));
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}
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const char *json_string_value(const json_t *string);
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size_t json_string_length(const json_t *string);
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json_int_t json_integer_value(const json_t *integer);
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double json_real_value(const json_t *real);
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double json_number_value(const json_t *json);
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int json_string_set(json_t *string, const char *value);
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int json_string_setn(json_t *string, const char *value, size_t len);
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int json_string_set_nocheck(json_t *string, const char *value);
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int json_string_setn_nocheck(json_t *string, const char *value, size_t len);
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int json_integer_set(json_t *integer, json_int_t value);
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int json_real_set(json_t *real, double value);
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/* pack, unpack */
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json_t *json_pack(const char *fmt, ...) JANSSON_ATTRS(warn_unused_result);
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json_t *json_pack_ex(json_error_t *error, size_t flags, const char *fmt, ...) JANSSON_ATTRS(warn_unused_result);
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json_t *json_vpack_ex(json_error_t *error, size_t flags, const char *fmt, va_list ap) JANSSON_ATTRS(warn_unused_result);
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#define JSON_VALIDATE_ONLY 0x1
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#define JSON_STRICT 0x2
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int json_unpack(json_t *root, const char *fmt, ...);
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int json_unpack_ex(json_t *root, json_error_t *error, size_t flags, const char *fmt, ...);
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int json_vunpack_ex(json_t *root, json_error_t *error, size_t flags, const char *fmt, va_list ap);
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/* sprintf */
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json_t *json_sprintf(const char *fmt, ...) JANSSON_ATTRS(warn_unused_result, format(printf, 1, 2));
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json_t *json_vsprintf(const char *fmt, va_list ap) JANSSON_ATTRS(warn_unused_result, format(printf, 1, 0));
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/* equality */
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int json_equal(const json_t *value1, const json_t *value2);
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/* copying */
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json_t *json_copy(json_t *value) JANSSON_ATTRS(warn_unused_result);
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json_t *json_deep_copy(const json_t *value) JANSSON_ATTRS(warn_unused_result);
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json_t *json_path_get(const json_t *json, const char *path);
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int json_path_set_new(json_t *json, const char *path, json_t *value, size_t flags, json_error_t *error);
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static JSON_INLINE
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int json_path_set(json_t *json, const char *path, json_t *value, size_t flags, json_error_t *error)
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{
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return json_path_set_new(json, path, json_incref(value), flags, error);
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}
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/* decoding */
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#define JSON_REJECT_DUPLICATES 0x1
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#define JSON_DISABLE_EOF_CHECK 0x2
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#define JSON_DECODE_ANY 0x4
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#define JSON_DECODE_INT_AS_REAL 0x8
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#define JSON_ALLOW_NUL 0x10
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typedef size_t (*json_load_callback_t)(void *buffer, size_t buflen, void *data);
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json_t *json_loads(const char *input, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result);
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json_t *json_loadb(const char *buffer, size_t buflen, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result);
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json_t *json_loadf(FILE *input, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result);
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json_t *json_loadfd(int input, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result);
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json_t *json_load_file(const char *path, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result);
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json_t *json_load_callback(json_load_callback_t callback, void *data, size_t flags, json_error_t *error) JANSSON_ATTRS(warn_unused_result);
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/* encoding */
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#define JSON_MAX_INDENT 0x1F
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#define JSON_INDENT(n) ((n) & JSON_MAX_INDENT)
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#define JSON_COMPACT 0x20
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#define JSON_ENSURE_ASCII 0x40
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#define JSON_SORT_KEYS 0x80
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#define JSON_PRESERVE_ORDER 0x100
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#define JSON_ENCODE_ANY 0x200
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#define JSON_ESCAPE_SLASH 0x400
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#define JSON_REAL_PRECISION(n) (((n) & 0x1F) << 11)
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#define JSON_EMBED 0x10000
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typedef int (*json_dump_callback_t)(const char *buffer, size_t size, void *data);
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char *json_dumps(const json_t *json, size_t flags) JANSSON_ATTRS(warn_unused_result);
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size_t json_dumpb(const json_t *json, char *buffer, size_t size, size_t flags);
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int json_dumpf(const json_t *json, FILE *output, size_t flags);
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int json_dumpfd(const json_t *json, int output, size_t flags);
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int json_dump_file(const json_t *json, const char *path, size_t flags);
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int json_dump_callback(const json_t *json, json_dump_callback_t callback, void *data, size_t flags);
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/* custom memory allocation */
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typedef void *(*json_malloc_t)(size_t);
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typedef void (*json_free_t)(void *);
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void json_set_alloc_funcs(json_malloc_t malloc_fn, json_free_t free_fn);
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void json_get_alloc_funcs(json_malloc_t *malloc_fn, json_free_t *free_fn);
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#ifdef __cplusplus
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}
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#endif
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#endif
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