1 /* $NetBSD: jsmn.h,v 1.2 2014/12/19 20:43:17 christos Exp $ */ 2 3 #ifndef __JSMN_H_ 4 #define __JSMN_H_ 5 6 /** 7 * JSON type identifier. Basic types are: 8 * o Object 9 * o Array 10 * o String 11 * o Other primitive: number, boolean (true/false) or null 12 */ 13 typedef enum { 14 JSMN_PRIMITIVE = 0, 15 JSMN_OBJECT = 1, 16 JSMN_ARRAY = 2, 17 JSMN_STRING = 3 18 } jsmntype_t; 19 20 typedef enum { 21 /* Not enough tokens were provided */ 22 JSMN_ERROR_NOMEM = -1, 23 /* Invalid character inside JSON string */ 24 JSMN_ERROR_INVAL = -2, 25 /* The string is not a full JSON packet, more bytes expected */ 26 JSMN_ERROR_PART = -3, 27 /* Everything was fine */ 28 JSMN_SUCCESS = 0 29 } jsmnerr_t; 30 31 /** 32 * JSON token description. 33 * @param type type (object, array, string etc.) 34 * @param start start position in JSON data string 35 * @param end end position in JSON data string 36 */ 37 typedef struct { 38 jsmntype_t type; 39 int start; 40 int end; 41 int size; 42 #ifdef JSMN_PARENT_LINKS 43 int parent; 44 #endif 45 } jsmntok_t; 46 47 /** 48 * JSON parser. Contains an array of token blocks available. Also stores 49 * the string being parsed now and current position in that string 50 */ 51 typedef struct { 52 unsigned int pos; /* offset in the JSON string */ 53 int toknext; /* next token to allocate */ 54 int toksuper; /* superior token node, e.g parent object or array */ 55 } jsmn_parser; 56 57 /** 58 * Create JSON parser over an array of tokens 59 */ 60 void jsmn_init(jsmn_parser *parser); 61 62 /** 63 * Run JSON parser. It parses a JSON data string into and array of tokens, each describing 64 * a single JSON object. 65 */ 66 jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js, 67 jsmntok_t *tokens, unsigned int num_tokens); 68 69 #endif /* __JSMN_H_ */ 70