jsmn.h

#ifndef JSMN_H
#define JSMN_H

#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * JSON type identifier. Basic types are:
 * 	o Object
 * 	o Array
 * 	o String
 * 	o Other primitive: number, boolean (true/false) or null
 */
typedef enum
{
	JSMN_UNDEFINED = 0,
	JSMN_OBJECT = 1,
	JSMN_ARRAY = 2,
	JSMN_STRING = 3,
	JSMN_PRIMITIVE = 4
}
jsmntype_t;

enum jsmnerr
{
	/* Not enough tokens were provided */
	JSMN_ERROR_NOMEM = -1,
	/* Invalid character inside JSON string */
	JSMN_ERROR_INVAL = -2,
	/* The string is not a full JSON packet, more bytes expected */
	JSMN_ERROR_PART = -3
};

/**
 * JSON token description.
 * type		type (object, array, string etc.)
 * start	start position in JSON data string
 * end		end position in JSON data string
 */
typedef struct
{
	jsmntype_t type;
	int start;
	int end;
	int size;
#ifdef JSMN_PARENT_LINKS
	int parent;
#endif
}
jsmntok_t;

/**
 * JSON parser. Contains an array of token blocks available. Also stores
 * the string being parsed now and current position in that string
 */
typedef struct
{
	unsigned int pos; /* offset in the JSON string */
	unsigned int toknext; /* next token to allocate */
	int toksuper; /* superior token node, e.g parent object or array */
}
jsmn_parser;

/**
 * Create JSON parser over an array of tokens
 */
void jsmn_init(jsmn_parser *parser);

/**
 * Run JSON parser. It parses a JSON data string into and array of tokens,
 * each describing a single JSON object.
 */
int jsmn_parse(
    jsmn_parser *parser,
    const char *js,
    size_t len,
    jsmntok_t *tokens,
    unsigned int num_tokens
);

#ifdef __cplusplus
}
#endif

#endif // JSMN_H