/*      $NetBSD: jsmn.h,v 1.5 2020/05/25 20:47:24 christos Exp $        */

#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_PRIMITIVE = 0,
       JSMN_OBJECT = 1,
       JSMN_ARRAY = 2,
       JSMN_STRING = 3
} jsmntype_t;

typedef enum {
       /* 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
} jsmnerr_t;

/**
* JSON token description.
* @param               type    type (object, array, string etc.)
* @param               start   start position in JSON data string
* @param               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.
*/
jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
               jsmntok_t *tokens, unsigned int num_tokens);

#ifdef __cplusplus
}
#endif

#endif /* __JSMN_H_ */