tools/perf/pmu-events/jsmn.h

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