diplodocus.org Git - nmh/blob - thirdparty/jsmn/jsmn.h

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