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/* SPDX-License-Identifier: MIT
* Source: https://ccodearchive.net/info/json.html
* Copyright (C) 2011 Joseph A. Adams (joeyadams3.14159@gmail.com) */
#ifndef CCAN_JSON_H
#define CCAN_JSON_H
#include <lib/defines.h>
#include <stdbool.h>
#include <stddef.h>
typedef enum {
JSON_NULL,
JSON_BOOL,
JSON_STRING,
JSON_NUMBER,
JSON_ARRAY,
JSON_OBJECT,
} JsonTag;
typedef struct JsonNode JsonNode;
struct JsonNode
{
/* only if parent is an object or array (NULL otherwise) */
JsonNode *parent;
JsonNode *prev, *next;
/* only if parent is an object (NULL otherwise) */
char *key; /* Must be valid UTF-8. */
JsonTag tag;
union {
/* JSON_BOOL */
bool bool_;
/* JSON_STRING */
char *string_; /* Must be valid UTF-8. */
/* JSON_NUMBER */
double number_;
/* JSON_ARRAY */
/* JSON_OBJECT */
struct {
JsonNode *head, *tail;
} children;
};
};
/*** Encoding, decoding, and validation ***/
KR_EXPORT JsonNode *json_decode (const char *json);
KR_EXPORT char *json_encode (const JsonNode *node);
KR_EXPORT char *json_encode_string (const char *str);
KR_EXPORT char *json_stringify (const JsonNode *node, const char *space);
KR_EXPORT void json_delete (JsonNode *node);
KR_EXPORT bool json_validate (const char *json);
/*** Lookup and traversal ***/
KR_EXPORT JsonNode *json_find_element (JsonNode *array, int index);
KR_EXPORT JsonNode *json_find_member (JsonNode *object, const char *key);
KR_EXPORT JsonNode *json_first_child (const JsonNode *node);
#define json_foreach(i, object_or_array) \
for ((i) = json_first_child(object_or_array); \
(i) != NULL; \
(i) = (i)->next)
/*** Construction and manipulation ***/
KR_EXPORT JsonNode *json_mknull(void);
KR_EXPORT JsonNode *json_mkbool(bool b);
KR_EXPORT JsonNode *json_mkstring(const char *s);
KR_EXPORT JsonNode *json_mknumber(double n);
KR_EXPORT JsonNode *json_mkarray(void);
KR_EXPORT JsonNode *json_mkobject(void);
KR_EXPORT void json_append_element(JsonNode *array, JsonNode *element);
KR_EXPORT void json_prepend_element(JsonNode *array, JsonNode *element);
KR_EXPORT void json_append_member(JsonNode *object, const char *key, JsonNode *value);
KR_EXPORT void json_prepend_member(JsonNode *object, const char *key, JsonNode *value);
KR_EXPORT void json_remove_from_parent(JsonNode *node);
/*** Debugging ***/
/*
* Look for structure and encoding problems in a JsonNode or its descendents.
*
* If a problem is detected, return false, writing a description of the problem
* to errmsg (unless errmsg is NULL).
*/
KR_EXPORT bool json_check(const JsonNode *node, char errmsg[256]);
#endif
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