1*4882a593Smuzhiyun /* SPDX-License-Identifier: MIT */ 2*4882a593Smuzhiyun #ifndef __JSMN_H_ 3*4882a593Smuzhiyun #define __JSMN_H_ 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * JSON type identifier. Basic types are: 7*4882a593Smuzhiyun * o Object 8*4882a593Smuzhiyun * o Array 9*4882a593Smuzhiyun * o String 10*4882a593Smuzhiyun * o Other primitive: number, boolean (true/false) or null 11*4882a593Smuzhiyun */ 12*4882a593Smuzhiyun typedef enum { 13*4882a593Smuzhiyun JSMN_PRIMITIVE = 0, 14*4882a593Smuzhiyun JSMN_OBJECT = 1, 15*4882a593Smuzhiyun JSMN_ARRAY = 2, 16*4882a593Smuzhiyun JSMN_STRING = 3 17*4882a593Smuzhiyun } jsmntype_t; 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun typedef enum { 20*4882a593Smuzhiyun /* Not enough tokens were provided */ 21*4882a593Smuzhiyun JSMN_ERROR_NOMEM = -1, 22*4882a593Smuzhiyun /* Invalid character inside JSON string */ 23*4882a593Smuzhiyun JSMN_ERROR_INVAL = -2, 24*4882a593Smuzhiyun /* The string is not a full JSON packet, more bytes expected */ 25*4882a593Smuzhiyun JSMN_ERROR_PART = -3, 26*4882a593Smuzhiyun /* Everything was fine */ 27*4882a593Smuzhiyun JSMN_SUCCESS = 0 28*4882a593Smuzhiyun } jsmnerr_t; 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun /* 31*4882a593Smuzhiyun * JSON token description. 32*4882a593Smuzhiyun * @param type type (object, array, string etc.) 33*4882a593Smuzhiyun * @param start start position in JSON data string 34*4882a593Smuzhiyun * @param end end position in JSON data string 35*4882a593Smuzhiyun */ 36*4882a593Smuzhiyun typedef struct { 37*4882a593Smuzhiyun jsmntype_t type; 38*4882a593Smuzhiyun int start; 39*4882a593Smuzhiyun int end; 40*4882a593Smuzhiyun int size; 41*4882a593Smuzhiyun } jsmntok_t; 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun /* 44*4882a593Smuzhiyun * JSON parser. Contains an array of token blocks available. Also stores 45*4882a593Smuzhiyun * the string being parsed now and current position in that string 46*4882a593Smuzhiyun */ 47*4882a593Smuzhiyun typedef struct { 48*4882a593Smuzhiyun unsigned int pos; /* offset in the JSON string */ 49*4882a593Smuzhiyun int toknext; /* next token to allocate */ 50*4882a593Smuzhiyun int toksuper; /* superior token node, e.g parent object or array */ 51*4882a593Smuzhiyun } jsmn_parser; 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun /* 54*4882a593Smuzhiyun * Create JSON parser over an array of tokens 55*4882a593Smuzhiyun */ 56*4882a593Smuzhiyun void jsmn_init(jsmn_parser *parser); 57*4882a593Smuzhiyun 58*4882a593Smuzhiyun /* 59*4882a593Smuzhiyun * Run JSON parser. It parses a JSON data string into and array of tokens, 60*4882a593Smuzhiyun * each describing a single JSON object. 61*4882a593Smuzhiyun */ 62*4882a593Smuzhiyun jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js, 63*4882a593Smuzhiyun size_t len, 64*4882a593Smuzhiyun jsmntok_t *tokens, unsigned int num_tokens); 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun const char *jsmn_strerror(jsmnerr_t err); 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun #endif /* __JSMN_H_ */ 69