1 #ifndef __JSMN_H_ 2 #define __JSMN_H_ 3 4 #ifdef __cplusplus 5 extern "C" { 6 #endif 7 8 /** 9 * JSON type identifier. Basic types are: 10 * o Object 11 * o Array 12 * o String 13 * o Other primitive: number, boolean (true/false) or null 14 */ 15 typedef enum { 16 JSMN_PRIMITIVE = 0, 17 JSMN_OBJECT = 1, 18 JSMN_ARRAY = 2, 19 JSMN_STRING = 3 20 } jsmntype_t; 21 22 typedef enum { 23 /* Not enough tokens were provided */ 24 JSMN_ERROR_NOMEM = -1, 25 /* Invalid character inside JSON string */ 26 JSMN_ERROR_INVAL = -2, 27 /* The string is not a full JSON packet, more bytes expected */ 28 JSMN_ERROR_PART = -3, 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 unsigned 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, size_t len, 67 jsmntok_t *tokens, unsigned int num_tokens); 68 69 #ifdef __cplusplus 70 } 71 #endif 72 73 #endif /* __JSMN_H_ */ 74