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/*
* Copyright (c) 2023 Egor Tensin <egor@tensin.name>
* This file is part of the "cimple" project.
* For details, see https://github.com/egor-tensin/cimple.
* Distributed under the MIT License.
*/
#include "json.h"
#include "buf.h"
#include "log.h"
#include "net.h"
#include <json-c/json_object.h>
#include <json-c/json_tokener.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
void json_free(struct json_object *obj)
{
json_object_put(obj);
}
static const char *json_to_string_internal(struct json_object *obj, int flags)
{
const char *result = json_object_to_json_string_ext(obj, flags);
if (!result) {
json_errno("json_object_to_json_string");
return NULL;
}
return result;
}
const char *json_to_string(struct json_object *obj)
{
return json_to_string_internal(obj, JSON_C_TO_STRING_SPACED);
}
const char *json_to_string_pretty(struct json_object *obj)
{
return json_to_string_internal(obj, JSON_C_TO_STRING_SPACED | JSON_C_TO_STRING_PRETTY);
}
struct json_object *json_from_string(const char *src)
{
enum json_tokener_error error;
struct json_object *result = json_tokener_parse_verbose(src, &error);
if (!result) {
json_errno("json_tokener_parse_verbose");
log_err("JSON: parsing failed: %s\n", json_tokener_error_desc(error));
return NULL;
}
return result;
}
int json_clone(const struct json_object *obj, const char *key, struct json_object **_value)
{
int ret = 0;
struct json_object *old_value = NULL;
ret = json_get(obj, key, &old_value);
if (ret < 0)
return ret;
struct json_object *new_value = NULL;
ret = json_object_deep_copy(old_value, &new_value, NULL);
if (ret < 0)
return ret;
*_value = new_value;
return ret;
}
int json_send(struct json_object *obj, int fd)
{
int ret = 0;
const char *str = json_to_string(obj);
if (!str)
return -1;
struct buf *buf = NULL;
ret = buf_create_from_string(&buf, str);
if (ret < 0)
return ret;
ret = net_send_buf(fd, buf);
buf_destroy(buf);
return ret;
}
struct json_object *json_recv(int fd)
{
struct json_object *result = NULL;
int ret = 0;
struct buf *buf = NULL;
ret = net_recv_buf(fd, &buf);
if (ret < 0)
return NULL;
result = json_from_string((const char *)buf_get_data(buf));
if (!result)
goto destroy_buf;
destroy_buf:
free((void *)buf_get_data(buf));
buf_destroy(buf);
return result;
}
int json_new_object(struct json_object **_obj)
{
struct json_object *obj = json_object_new_object();
if (!obj) {
json_errno("json_object_new_object");
return -1;
}
*_obj = obj;
return 0;
}
int json_new_array(struct json_object **_arr)
{
struct json_object *arr = json_object_new_array();
if (!arr) {
json_errno("json_object_new_array");
return -1;
}
*_arr = arr;
return 0;
}
int json_has(const struct json_object *obj, const char *key)
{
return json_object_object_get_ex(obj, key, NULL);
}
int json_get(const struct json_object *obj, const char *key, struct json_object **value)
{
if (!json_has(obj, key)) {
log_err("JSON: key is missing: %s\n", key);
return -1;
}
return json_object_object_get_ex(obj, key, value);
}
int json_get_string(const struct json_object *obj, const char *key, const char **_value)
{
struct json_object *value = NULL;
int ret = json_get(obj, key, &value);
if (ret < 0)
return ret;
if (!json_object_is_type(value, json_type_string)) {
log_err("JSON: key is not a string: %s\n", key);
return -1;
}
*_value = json_object_get_string(value);
return 0;
}
int json_get_int(const struct json_object *obj, const char *key, int64_t *_value)
{
struct json_object *value = NULL;
int ret = json_get(obj, key, &value);
if (ret < 0)
return ret;
if (!json_object_is_type(value, json_type_int)) {
log_err("JSON: key is not an integer: %s\n", key);
return -1;
}
errno = 0;
int64_t tmp = json_object_get_int64(value);
if (errno) {
log_err("JSON: failed to parse integer from key: %s\n", key);
return -1;
}
*_value = tmp;
return 0;
}
static int json_set_internal(struct json_object *obj, const char *key, struct json_object *value,
unsigned flags)
{
int ret = 0;
ret = json_object_object_add_ex(obj, key, value, flags);
if (ret < 0) {
json_errno("json_object_object_add_ex");
return ret;
}
return 0;
}
static int json_set_string_internal(struct json_object *obj, const char *key, const char *_value,
unsigned flags)
{
struct json_object *value = json_object_new_string(_value);
if (!value) {
json_errno("json_object_new_string");
return -1;
}
int ret = json_set_internal(obj, key, value, flags);
if (ret < 0)
goto free_value;
return ret;
free_value:
json_object_put(value);
return ret;
}
static int json_set_int_internal(struct json_object *obj, const char *key, int64_t _value,
unsigned flags)
{
struct json_object *value = json_object_new_int64(_value);
if (!value) {
json_errno("json_object_new_int");
return -1;
}
int ret = json_set_internal(obj, key, value, flags);
if (ret < 0)
goto free_value;
return ret;
free_value:
json_object_put(value);
return ret;
}
int json_set(struct json_object *obj, const char *key, struct json_object *value)
{
return json_set_internal(obj, key, value, 0);
}
int json_set_string(struct json_object *obj, const char *key, const char *value)
{
return json_set_string_internal(obj, key, value, 0);
}
int json_set_int(struct json_object *obj, const char *key, int64_t value)
{
return json_set_int_internal(obj, key, value, 0);
}
#ifndef JSON_C_OBJECT_ADD_CONSTANT_KEY
#define JSON_C_OBJECT_ADD_CONSTANT_KEY JSON_C_OBJECT_KEY_IS_CONSTANT
#endif
static const unsigned json_const_key_flags = JSON_C_OBJECT_ADD_CONSTANT_KEY;
int json_set_const_key(struct json_object *obj, const char *key, struct json_object *value)
{
return json_set_internal(obj, key, value, json_const_key_flags);
}
int json_set_string_const_key(struct json_object *obj, const char *key, const char *value)
{
return json_set_string_internal(obj, key, value, json_const_key_flags);
}
int json_set_int_const_key(struct json_object *obj, const char *key, int64_t value)
{
return json_set_int_internal(obj, key, value, json_const_key_flags);
}
int json_append(struct json_object *arr, struct json_object *elem)
{
int ret = json_object_array_add(arr, elem);
if (ret < 0) {
json_errno("json_object_array_add");
return ret;
}
return ret;
}
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