119 lines
3.8 KiB
C
119 lines
3.8 KiB
C
/*
|
|
* MIT License
|
|
*
|
|
* Copyright (c) 2010 Serge Zaitsev
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
#ifndef JSMN_H
|
|
#define JSMN_H
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
// #ifdef JSMN_STATIC
|
|
// #define JSMN_API static
|
|
// #else
|
|
#define JSMN_API extern
|
|
// #endif
|
|
|
|
/**
|
|
* JSON type identifier. Basic types are:
|
|
* o Object
|
|
* o Array
|
|
* o String
|
|
* o Other primitive: number, boolean (true/false) or null
|
|
*/
|
|
typedef enum {
|
|
// end market
|
|
JSMN_INVALID = 0, // type == 0 is invalid
|
|
JSMN_OBJECT = 1,
|
|
JSMN_ARRAY = 2,
|
|
JSMN_STRING = 3,
|
|
JSMN_PRIMITIVE = 4,
|
|
// new types created during post-processing
|
|
JSMN_KEY = 5, // JSMN_STRING with size 1
|
|
JSMN_NULL = 6, // JSMN_PRIMITIVE starting with 'n'
|
|
JSMN_BOOL_FALSE = 7, // JSMN_PRIMITIVE starting with 'f' or 'F'
|
|
JSMN_BOOL_TRUE = 8, // JSMN_PRIMITIVE starting with 't' or 'T'
|
|
JSMN_FLOAT = 9, // JSMN_PRIMITIVE starting with '.', '-', '0-9' and containing a '.'
|
|
JSMN_INT = 10, // JSMN_PRIMITIVE starting with '-', '0-9' and not containing a '.'
|
|
JSMN_UINT = 11, // JSMN_PRIMITIVE starting with '0-9' and not containing a '.'
|
|
} jsmntype_t;
|
|
|
|
enum jsmnerr {
|
|
/* Not enough tokens were provided */
|
|
JSMN_ERROR_NOMEM = -1,
|
|
/* Invalid character inside JSON string */
|
|
JSMN_ERROR_INVAL = -2,
|
|
/* The string is not a full JSON packet, more bytes expected */
|
|
JSMN_ERROR_PART = -3
|
|
};
|
|
|
|
/**
|
|
* JSON token description.
|
|
* type type (object, array, string etc.)
|
|
* start start position in JSON data string
|
|
* end end position in JSON data string
|
|
*/
|
|
// size of bitfield, sum is 32
|
|
#define JSMN_TYPE_B 4
|
|
#define JSMN_SIZE_B 6 // max 63 items per level (ex: max 63 keys per object)
|
|
#define JSMN_START_B 11 // max 2KB input buffer
|
|
#define JSMN_LEN_B 11 // max 2KB per item
|
|
|
|
typedef struct jsmntok {
|
|
jsmntype_t type : JSMN_TYPE_B;
|
|
unsigned int size : JSMN_SIZE_B;
|
|
unsigned int start : JSMN_START_B;
|
|
unsigned int len : JSMN_LEN_B;
|
|
} jsmntok_t;
|
|
|
|
/**
|
|
* JSON parser. Contains an array of token blocks available. Also stores
|
|
* the string being parsed now and current position in that string.
|
|
*/
|
|
typedef struct jsmn_parser {
|
|
unsigned int pos; /* offset in the JSON string */
|
|
unsigned int toknext; /* next token to allocate */
|
|
int toksuper; /* superior token node, e.g. parent object or array */
|
|
} jsmn_parser;
|
|
|
|
/**
|
|
* Create JSON parser over an array of tokens
|
|
*/
|
|
JSMN_API void jsmn_init(jsmn_parser *parser);
|
|
|
|
/**
|
|
* Run JSON parser. It parses a JSON data string into and array of tokens, each
|
|
* describing
|
|
* a single JSON object.
|
|
*/
|
|
JSMN_API int jsmn_parse(jsmn_parser *parser, const char *js, const size_t len,
|
|
jsmntok_t *tokens, const unsigned int num_tokens);
|
|
|
|
/**
|
|
*
|
|
* In-place json unescape
|
|
*
|
|
*/
|
|
void json_unescape(char* string);
|
|
|
|
#endif /* JSMN_H */
|