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jsmn.h
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jsmn.h
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/*
* MIT License
*
* Copyright (c) 2010 Serge Zaitsev
* Copyright (c) 2020 Mark Conway (mark.conway@themobiusproject.com)
*
* 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_
#define JSMN_VERSION_MAJOR 2
#define JSMN_VERSION_MINOR 0
#define JSMN_VERSION_PATCH 0
#if defined(UNIT_TESTING)
#include <stdarg.h>
#include <setjmp.h>
#include <cmocka.h>
#endif
#include <stddef.h>
#include <limits.h>
#include "jsmn_defines.h"
#if defined(JSMN_SHORT_TOKENS)
typedef unsigned short jsmnint_t;
# define JSMNINT_MAX USHRT_MAX
#else
typedef unsigned int jsmnint_t;
# define JSMNINT_MAX UINT_MAX
#endif
#define JSMN_NEG ((jsmnint_t)-1)
/**
* JSON type identifier. Basic types are:
*/
typedef enum {
JSMN_UNDEFINED = 0x0000,
JSMN_OBJECT = 0x0001, /*!< Object */
JSMN_ARRAY = 0x0002, /*!< Array */
JSMN_STRING = 0x0004, /*!< String */
JSMN_PRIMITIVE = 0x0008, /*!< Other primitive: number, boolean (true/false) or null */
JSMN_KEY = 0x0010, /*!< is a key */
JSMN_VALUE = 0x0020, /*!< is a value */
/* Complex elements */
JSMN_CONTAINER = JSMN_OBJECT | JSMN_ARRAY,
#if !defined(JSMN_PERMISSIVE_KEY)
JSMN_KEY_TYPE = JSMN_STRING,
#else
JSMN_KEY_TYPE = JSMN_STRING | JSMN_PRIMITIVE,
#endif
JSMN_VAL_TYPE = JSMN_OBJECT | JSMN_ARRAY | JSMN_STRING | JSMN_PRIMITIVE,
JSMN_OBJ_VAL = JSMN_OBJECT | JSMN_VALUE,
JSMN_ARR_VAL = JSMN_ARRAY | JSMN_VALUE,
JSMN_STR_KEY = JSMN_STRING | JSMN_KEY,
JSMN_STR_VAL = JSMN_STRING | JSMN_VALUE,
JSMN_PRI_VAL = JSMN_PRIMITIVE | JSMN_VALUE,
#if defined(JSMN_PERMISSIVE_KEY)
JSMN_PRI_KEY = JSMN_PRIMITIVE | JSMN_KEY,
#endif
/* Primitive extension */
JSMN_PRI_LITERAL = 0x0040, /*!< true, false, null */
JSMN_PRI_INTEGER = 0x0080, /*!< 0, 1 - 9 */
JSMN_PRI_SIGN = 0x0100, /*!< minus sign, '-' or plus sign, '+' */
JSMN_PRI_DECIMAL = 0x0200, /*!< deminal point '.' */
JSMN_PRI_EXPONENT = 0x0400, /*!< exponent, 'e' or 'E' */
JSMN_PRI_MINUS = JSMN_PRI_SIGN,
/* Parsing validation, expectations, and state information */
JSMN_PRI_CONTINUE = 0x0800, /*!< Allow a continuation of a PRIMITIVE */
JSMN_CLOSE = 0x1000, /*!< Close OBJECT '}' or ARRAY ']' */
JSMN_COLON = 0x2000, /*!< Colon ':' expected after KEY */
JSMN_COMMA = 0x4000, /*!< Comma ',' expected after VALUE */
JSMN_INSD_OBJ = 0x8000, /*!< Inside an OBJECT */
/* Parsing rules */
#if !defined(JSMN_PERMISSIVE_RULESET)
JSMN_ROOT_INIT = JSMN_VAL_TYPE | JSMN_VALUE,
# if !defined(JSMN_MULTIPLE_JSON)
JSMN_ROOT = JSMN_UNDEFINED,
# else
JSMN_ROOT = JSMN_VAL_TYPE | JSMN_VALUE,
# endif
JSMN_OPEN_OBJECT = JSMN_KEY_TYPE | JSMN_KEY | JSMN_CLOSE | JSMN_INSD_OBJ,
JSMN_AFTR_OBJ_KEY = JSMN_VALUE | JSMN_INSD_OBJ | JSMN_COLON,
JSMN_AFTR_OBJ_VAL = JSMN_CLOSE | JSMN_INSD_OBJ | JSMN_COMMA,
JSMN_OPEN_ARRAY = JSMN_VAL_TYPE | JSMN_VALUE | JSMN_CLOSE,
JSMN_AFTR_ARR_VAL = JSMN_VALUE | JSMN_CLOSE | JSMN_COMMA,
JSMN_AFTR_CLOSE = JSMN_CLOSE | JSMN_COMMA,
JSMN_AFTR_COLON = JSMN_VAL_TYPE | JSMN_VALUE | JSMN_INSD_OBJ,
JSMN_AFTR_COMMA_O = JSMN_KEY_TYPE | JSMN_KEY | JSMN_INSD_OBJ,
JSMN_AFTR_COMMA_A = JSMN_VAL_TYPE | JSMN_VALUE,
#else
JSMN_ROOT_INIT = JSMN_VAL_TYPE | JSMN_VALUE | JSMN_KEY,
# if !defined(JSMN_MULTIPLE_JSON_FAIL)
JSMN_ROOT = JSMN_VAL_TYPE | JSMN_COLON | JSMN_COMMA,
JSMN_ROOT_AFTR_O = JSMN_VAL_TYPE | JSMN_COMMA,
# else
JSMN_ROOT = JSMN_UNDEFINED,
JSMN_ROOT_AFTR_O = JSMN_UNDEFINED,
# endif
JSMN_OPEN_OBJECT = JSMN_KEY_TYPE | JSMN_KEY | JSMN_CLOSE | JSMN_INSD_OBJ,
JSMN_AFTR_OBJ_KEY = JSMN_VALUE | JSMN_INSD_OBJ | JSMN_COLON,
JSMN_AFTR_OBJ_VAL = JSMN_VAL_TYPE | JSMN_CLOSE | JSMN_INSD_OBJ | JSMN_COMMA,
JSMN_OPEN_ARRAY = JSMN_VAL_TYPE | JSMN_VALUE | JSMN_CLOSE,
JSMN_AFTR_ARR_VAL = JSMN_VAL_TYPE | JSMN_CLOSE | JSMN_COMMA,
JSMN_AFTR_CLOSE = JSMN_VAL_TYPE | JSMN_CLOSE | JSMN_COMMA,
JSMN_AFTR_COLON = JSMN_VAL_TYPE | JSMN_VALUE | JSMN_INSD_OBJ,
JSMN_AFTR_COLON_R = JSMN_VAL_TYPE | JSMN_VALUE,
JSMN_AFTR_COMMA_O = JSMN_KEY_TYPE | JSMN_KEY | JSMN_INSD_OBJ,
JSMN_AFTR_COMMA_A = JSMN_VAL_TYPE | JSMN_VALUE,
JSMN_AFTR_COMMA_R = JSMN_VAL_TYPE,
#endif
} jsmntype_t;
/*!
* JSMN Error Codes
*/
typedef enum jsmnerr {
JSMN_SUCCESS = 0,
JSMN_ERROR_NOMEM = -1, /*!< Not enough tokens were provided */
JSMN_ERROR_LENGTH = -2, /*!< Input data too long */
JSMN_ERROR_INVAL = -3, /*!< Invalid character inside JSON string */
JSMN_ERROR_PART = -4, /*!< The string is not a full JSON packet, more bytes expected */
JSMN_ERROR_BRACKETS = -5, /*!< The JSON string has unmatched brackets */
JSMN_ERROR_MAX = -5, /*!< "MAX" value to be tested against when checking for errors */
} jsmnerr;
/*!
* JSMN Boolean
*/
typedef enum jsmnbool {
JSMN_FALSE = 0, /*!< false */
JSMN_TRUE = 1, /*!< true */
} jsmnbool;
/**
* JSON token description.
*/
typedef struct jsmntok_t {
jsmntype_t type; /*!< type (object, array, string etc.) */
jsmnint_t start; /*!< start position in JSON data string */
jsmnint_t end; /*!< end position in JSON data string */
jsmnint_t size; /*!< number of children */
#if defined(JSMN_PARENT_LINKS)
jsmnint_t parent; /*!< parent id */
#endif
#if defined(JSMN_NEXT_SIBLING)
jsmnint_t next_sibling; /*!< next sibling id */
#endif
} 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 {
jsmnint_t pos; /*!< offset in the JSON string */
jsmnint_t toknext; /*!< next token to allocate */
/*!< when tokens == NULL, keeps track of container types to a depth of (sizeof(jsmnint_t) * 8) */
jsmnint_t toksuper; /*!< superior token node, e.g. parent object or array */
/*!< when tokens == NULL, toksuper represents container depth */
jsmnint_t count; /*!< useful to have in the parser when you are continuing a failed parse with NULL tokens */
jsmntype_t expected; /*!< Expected jsmn type(s) */
} jsmn_parser;
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create JSON parser over an array of tokens
*
* @param[out] parser jsmn parser
*/
JSMN_API
void jsmn_init(jsmn_parser *parser);
/**
* @brief Run JSON parser
*
* It parses a JSON data string into and array of tokens, each
* describing a single JSON object.
*
* @param[in,out] parser jsmn parser
* @param[in] js JSON data string
* @param[in] len JSON data string length
* @param[in,out] tokens pointer to memory allocated for tokens or NULL
* @param[in] num_tokens number of tokens allocated
* @return jsmnint_t number of tokens found or ERRNO
*/
JSMN_API
jsmnint_t jsmn_parse(jsmn_parser *parser, const char *js,
const size_t len, jsmntok_t *tokens,
const size_t num_tokens);
#if !defined(JSMN_HEADER)
#include "jsmn.c"
#endif /* JSMN_HEADER */
#ifdef __cplusplus
}
#endif
#endif /* JSMN_H_ */