Thao Nguyen / jsmn

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jsmn.h@0:6b15d3d45f70, 2017-09-30 (annotated)

Committer:
nguyenmanhthao996tn
Date:
Sat Sep 30 09:11:52 2017 +0000
Revision:
0:6b15d3d45f70
Worked version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nguyenmanhthao996tn 0:6b15d3d45f70 1 #ifndef __JSMN_H_
nguyenmanhthao996tn 0:6b15d3d45f70 2 #define __JSMN_H_
nguyenmanhthao996tn 0:6b15d3d45f70 3
nguyenmanhthao996tn 0:6b15d3d45f70 4 #include <stddef.h>
nguyenmanhthao996tn 0:6b15d3d45f70 5
nguyenmanhthao996tn 0:6b15d3d45f70 6 #ifdef __cplusplus
nguyenmanhthao996tn 0:6b15d3d45f70 7 extern "C" {
nguyenmanhthao996tn 0:6b15d3d45f70 8 #endif
nguyenmanhthao996tn 0:6b15d3d45f70 9
nguyenmanhthao996tn 0:6b15d3d45f70 10 /**
nguyenmanhthao996tn 0:6b15d3d45f70 11 * JSON type identifier. Basic types are:
nguyenmanhthao996tn 0:6b15d3d45f70 12 * o Object
nguyenmanhthao996tn 0:6b15d3d45f70 13 * o Array
nguyenmanhthao996tn 0:6b15d3d45f70 14 * o String
nguyenmanhthao996tn 0:6b15d3d45f70 15 * o Other primitive: number, boolean (true/false) or null
nguyenmanhthao996tn 0:6b15d3d45f70 16 */
nguyenmanhthao996tn 0:6b15d3d45f70 17 typedef enum {
nguyenmanhthao996tn 0:6b15d3d45f70 18 JSMN_UNDEFINED = 0,
nguyenmanhthao996tn 0:6b15d3d45f70 19 JSMN_OBJECT = 1,
nguyenmanhthao996tn 0:6b15d3d45f70 20 JSMN_ARRAY = 2,
nguyenmanhthao996tn 0:6b15d3d45f70 21 JSMN_STRING = 3,
nguyenmanhthao996tn 0:6b15d3d45f70 22 JSMN_PRIMITIVE = 4
nguyenmanhthao996tn 0:6b15d3d45f70 23 } jsmntype_t;
nguyenmanhthao996tn 0:6b15d3d45f70 24
nguyenmanhthao996tn 0:6b15d3d45f70 25 enum jsmnerr {
nguyenmanhthao996tn 0:6b15d3d45f70 26 /* Not enough tokens were provided */
nguyenmanhthao996tn 0:6b15d3d45f70 27 JSMN_ERROR_NOMEM = -1,
nguyenmanhthao996tn 0:6b15d3d45f70 28 /* Invalid character inside JSON string */
nguyenmanhthao996tn 0:6b15d3d45f70 29 JSMN_ERROR_INVAL = -2,
nguyenmanhthao996tn 0:6b15d3d45f70 30 /* The string is not a full JSON packet, more bytes expected */
nguyenmanhthao996tn 0:6b15d3d45f70 31 JSMN_ERROR_PART = -3
nguyenmanhthao996tn 0:6b15d3d45f70 32 };
nguyenmanhthao996tn 0:6b15d3d45f70 33
nguyenmanhthao996tn 0:6b15d3d45f70 34 /**
nguyenmanhthao996tn 0:6b15d3d45f70 35 * JSON token description.
nguyenmanhthao996tn 0:6b15d3d45f70 36 * type type (object, array, string etc.)
nguyenmanhthao996tn 0:6b15d3d45f70 37 * start start position in JSON data string
nguyenmanhthao996tn 0:6b15d3d45f70 38 * end end position in JSON data string
nguyenmanhthao996tn 0:6b15d3d45f70 39 */
nguyenmanhthao996tn 0:6b15d3d45f70 40 typedef struct {
nguyenmanhthao996tn 0:6b15d3d45f70 41 jsmntype_t type;
nguyenmanhthao996tn 0:6b15d3d45f70 42 int start;
nguyenmanhthao996tn 0:6b15d3d45f70 43 int end;
nguyenmanhthao996tn 0:6b15d3d45f70 44 int size;
nguyenmanhthao996tn 0:6b15d3d45f70 45 #ifdef JSMN_PARENT_LINKS
nguyenmanhthao996tn 0:6b15d3d45f70 46 int parent;
nguyenmanhthao996tn 0:6b15d3d45f70 47 #endif
nguyenmanhthao996tn 0:6b15d3d45f70 48 } jsmntok_t;
nguyenmanhthao996tn 0:6b15d3d45f70 49
nguyenmanhthao996tn 0:6b15d3d45f70 50 /**
nguyenmanhthao996tn 0:6b15d3d45f70 51 * JSON parser. Contains an array of token blocks available. Also stores
nguyenmanhthao996tn 0:6b15d3d45f70 52 * the string being parsed now and current position in that string
nguyenmanhthao996tn 0:6b15d3d45f70 53 */
nguyenmanhthao996tn 0:6b15d3d45f70 54 typedef struct {
nguyenmanhthao996tn 0:6b15d3d45f70 55 unsigned int pos; /* offset in the JSON string */
nguyenmanhthao996tn 0:6b15d3d45f70 56 unsigned int toknext; /* next token to allocate */
nguyenmanhthao996tn 0:6b15d3d45f70 57 int toksuper; /* superior token node, e.g parent object or array */
nguyenmanhthao996tn 0:6b15d3d45f70 58 } jsmn_parser;
nguyenmanhthao996tn 0:6b15d3d45f70 59
nguyenmanhthao996tn 0:6b15d3d45f70 60 /**
nguyenmanhthao996tn 0:6b15d3d45f70 61 * Create JSON parser over an array of tokens
nguyenmanhthao996tn 0:6b15d3d45f70 62 */
nguyenmanhthao996tn 0:6b15d3d45f70 63 void jsmn_init(jsmn_parser *parser);
nguyenmanhthao996tn 0:6b15d3d45f70 64
nguyenmanhthao996tn 0:6b15d3d45f70 65 /**
nguyenmanhthao996tn 0:6b15d3d45f70 66 * Run JSON parser. It parses a JSON data string into and array of tokens, each describing
nguyenmanhthao996tn 0:6b15d3d45f70 67 * a single JSON object.
nguyenmanhthao996tn 0:6b15d3d45f70 68 */
nguyenmanhthao996tn 0:6b15d3d45f70 69 int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
nguyenmanhthao996tn 0:6b15d3d45f70 70 jsmntok_t *tokens, unsigned int num_tokens);
nguyenmanhthao996tn 0:6b15d3d45f70 71
nguyenmanhthao996tn 0:6b15d3d45f70 72 #ifdef __cplusplus
nguyenmanhthao996tn 0:6b15d3d45f70 73 }
nguyenmanhthao996tn 0:6b15d3d45f70 74 #endif
nguyenmanhthao996tn 0:6b15d3d45f70 75
nguyenmanhthao996tn 0:6b15d3d45f70 76 #endif /* __JSMN_H_ */