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aws-iot-example
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jsmn.h
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00001 /* 00002 * Copyright (c) 2010 Serge A. Zaitsev 00003 * 00004 * Permission is hereby granted, free of charge, to any person obtaining a copy 00005 * of this software and associated documentation files (the "Software"), to deal 00006 * in the Software without restriction, including without limitation the rights 00007 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00008 * copies of the Software, and to permit persons to whom the Software is 00009 * furnished to do so, subject to the following conditions: 00010 * 00011 * The above copyright notice and this permission notice shall be included in 00012 * all copies or substantial portions of the Software. 00013 * 00014 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00015 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00016 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00017 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00018 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00019 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00020 * THE SOFTWARE. 00021 */ 00022 00023 /** 00024 * @file jsmn.h 00025 * @brief Definition of the JSMN (Jasmine) JSON parser. 00026 * 00027 * For more information on JSMN: 00028 * @see http://zserge.com/jsmn.html 00029 */ 00030 00031 #ifndef __JSMN_H_ 00032 #define __JSMN_H_ 00033 00034 #include <stddef.h> 00035 00036 #ifdef __cplusplus 00037 extern "C" { 00038 #endif 00039 00040 /** 00041 * JSON type identifier. Basic types are: 00042 * o Object 00043 * o Array 00044 * o String 00045 * o Other primitive: number, boolean (true/false) or null 00046 */ 00047 typedef enum { 00048 JSMN_UNDEFINED = 0, 00049 JSMN_OBJECT = 1, 00050 JSMN_ARRAY = 2, 00051 JSMN_STRING = 3, 00052 JSMN_PRIMITIVE = 4 00053 } jsmntype_t; 00054 00055 enum jsmnerr { 00056 /* Not enough tokens were provided */ 00057 JSMN_ERROR_NOMEM = -1, 00058 /* Invalid character inside JSON string */ 00059 JSMN_ERROR_INVAL = -2, 00060 /* The string is not a full JSON packet, more bytes expected */ 00061 JSMN_ERROR_PART = -3 00062 }; 00063 00064 /** 00065 * JSON token description. 00066 * @param type type (object, array, string etc.) 00067 * @param start start position in JSON data string 00068 * @param end end position in JSON data string 00069 */ 00070 typedef struct { 00071 jsmntype_t type; 00072 int start; 00073 int end; 00074 int size; 00075 #ifdef JSMN_PARENT_LINKS 00076 int parent; 00077 #endif 00078 } jsmntok_t; 00079 00080 /** 00081 * JSON parser. Contains an array of token blocks available. Also stores 00082 * the string being parsed now and current position in that string 00083 */ 00084 typedef struct { 00085 unsigned int pos; /* offset in the JSON string */ 00086 unsigned int toknext; /* next token to allocate */ 00087 int toksuper; /* superior token node, e.g parent object or array */ 00088 } jsmn_parser; 00089 00090 /** 00091 * Create JSON parser over an array of tokens 00092 */ 00093 void jsmn_init(jsmn_parser *parser); 00094 00095 /** 00096 * Run JSON parser. It parses a JSON data string into and array of tokens, each describing 00097 * a single JSON object. 00098 */ 00099 int jsmn_parse(jsmn_parser *parser, const char *js, size_t len, 00100 jsmntok_t *tokens, unsigned int num_tokens); 00101 00102 #ifdef __cplusplus 00103 } 00104 #endif 00105 00106 #endif /* __JSMN_H_ */
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