Gerard COURIVAUD / JSON

json lib

Dependents:   grove_stream_jpa_sd2 grove_stream_jpa_sd2 grove_stream_jpa_sd2-2 grove_stream_jpa_sd2-3 ... more

Json.h@4:ae34010d87e5, 2016-08-02 (annotated)

Committer:
faheem_chaudhary
Date:
Tue Aug 02 20:21:04 2016 +0000
Revision:
4:ae34010d87e5
Parent:
3:fab591fca1e7
Child:
5:dd98cf00ed9b
Added Key search in flat format

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mercurywaters 3:fab591fca1e7 1 #ifndef __JSON_LIB_CLASS_H_
mercurywaters 3:fab591fca1e7 2 #define __JSON_LIB_CLASS_H_
mercurywaters 3:fab591fca1e7 3
mercurywaters 3:fab591fca1e7 4 #include "jsmn.h"
mercurywaters 3:fab591fca1e7 5 #include <stdlib.h>
mercurywaters 3:fab591fca1e7 6 #include <string.h>
mercurywaters 3:fab591fca1e7 7
mercurywaters 3:fab591fca1e7 8 /**
mercurywaters 3:fab591fca1e7 9 * JSON wrapper over JSMN lib
mercurywaters 3:fab591fca1e7 10 */
mercurywaters 3:fab591fca1e7 11
mercurywaters 3:fab591fca1e7 12 class Json
mercurywaters 3:fab591fca1e7 13 {
mercurywaters 3:fab591fca1e7 14 private:
mercurywaters 3:fab591fca1e7 15 const char * source;
mercurywaters 3:fab591fca1e7 16 const size_t sourceLength;
mercurywaters 3:fab591fca1e7 17 jsmntok_t * tokens;
mercurywaters 3:fab591fca1e7 18 int tokenCount;
mercurywaters 3:fab591fca1e7 19 Json ( const Json & other );
mercurywaters 3:fab591fca1e7 20
mercurywaters 3:fab591fca1e7 21 public:
mercurywaters 3:fab591fca1e7 22 /** The only constructor allowed. As JSON object will create/allocate
mercurywaters 3:fab591fca1e7 23 * memory for it's working, in favor of small memory fottprints, it
mercurywaters 3:fab591fca1e7 24 * is not allowed to be passed-by-value. So there is no copy or
mercurywaters 3:fab591fca1e7 25 * default constructor
mercurywaters 3:fab591fca1e7 26 * @param jsonString - char string containing JSON data
mercurywaters 3:fab591fca1e7 27 * @param length - length of the jsonString
mercurywaters 3:fab591fca1e7 28 */
mercurywaters 3:fab591fca1e7 29 Json ( const char * jsonString, size_t length );
mercurywaters 3:fab591fca1e7 30 virtual ~Json ();
mercurywaters 3:fab591fca1e7 31
faheem_chaudhary 4:ae34010d87e5 32 int findKeyIndex ( const char * key, const int &startingAt ) const;
mercurywaters 3:fab591fca1e7 33 int findKeyIndexIn ( const char * key, const int &parentIndex ) const;
mercurywaters 3:fab591fca1e7 34 int findChildIndexOf ( const int &parentIndex, const int &startingAt ) const;
mercurywaters 3:fab591fca1e7 35 bool matches ( const int & tokenIndex, const char * value ) const;
mercurywaters 3:fab591fca1e7 36
mercurywaters 3:fab591fca1e7 37 inline bool isValidJson () const;
mercurywaters 3:fab591fca1e7 38 inline jsmntype_t type ( const int tokenIndex ) const;
mercurywaters 3:fab591fca1e7 39 inline int parent ( const int tokenIndex ) const;
mercurywaters 3:fab591fca1e7 40 inline int childCount ( const int tokenIndex ) const;
mercurywaters 3:fab591fca1e7 41 inline int tokenLength ( const int tokenIndex ) const;
mercurywaters 3:fab591fca1e7 42 inline const char * tokenAddress ( const int tokenIndex ) const;
mercurywaters 3:fab591fca1e7 43
mercurywaters 3:fab591fca1e7 44 int tokenIntegerValue ( const int tokenIndex ) const;
mercurywaters 3:fab591fca1e7 45 float tokenNumberValue ( const int tokenIndex ) const;
mercurywaters 3:fab591fca1e7 46
mercurywaters 3:fab591fca1e7 47 inline bool tokenBooleanValue ( const int tokenIndex ) const;
mercurywaters 3:fab591fca1e7 48
mercurywaters 3:fab591fca1e7 49 // void print () const;
faheem_chaudhary 4:ae34010d87e5 50
faheem_chaudhary 4:ae34010d87e5 51 static char * unescape ( char * jsonString );
mercurywaters 3:fab591fca1e7 52 };
mercurywaters 3:fab591fca1e7 53
mercurywaters 3:fab591fca1e7 54 inline bool Json::isValidJson () const
mercurywaters 3:fab591fca1e7 55 {
mercurywaters 3:fab591fca1e7 56 return ( tokenCount >= 1 );
mercurywaters 3:fab591fca1e7 57 }
mercurywaters 3:fab591fca1e7 58
mercurywaters 3:fab591fca1e7 59 inline jsmntype_t Json::type ( const int tokenIndex ) const
mercurywaters 3:fab591fca1e7 60 {
mercurywaters 3:fab591fca1e7 61 return tokens [ tokenIndex ].type;
mercurywaters 3:fab591fca1e7 62 }
mercurywaters 3:fab591fca1e7 63
mercurywaters 3:fab591fca1e7 64 inline int Json::parent ( const int tokenIndex ) const
mercurywaters 3:fab591fca1e7 65 {
mercurywaters 3:fab591fca1e7 66 return tokens [ tokenIndex ].parent;
mercurywaters 3:fab591fca1e7 67 }
mercurywaters 3:fab591fca1e7 68
mercurywaters 3:fab591fca1e7 69 inline int Json::childCount ( const int tokenIndex ) const
mercurywaters 3:fab591fca1e7 70 {
mercurywaters 3:fab591fca1e7 71 return tokens [ tokenIndex ].childCount;
mercurywaters 3:fab591fca1e7 72 }
mercurywaters 3:fab591fca1e7 73
mercurywaters 3:fab591fca1e7 74 inline int Json::tokenLength ( const int tokenIndex ) const
mercurywaters 3:fab591fca1e7 75 {
mercurywaters 3:fab591fca1e7 76 return tokens [ tokenIndex ].end - tokens [ tokenIndex ].start;
mercurywaters 3:fab591fca1e7 77 }
mercurywaters 3:fab591fca1e7 78
mercurywaters 3:fab591fca1e7 79 inline const char * Json::tokenAddress ( const int tokenIndex ) const
mercurywaters 3:fab591fca1e7 80 {
mercurywaters 3:fab591fca1e7 81 return source + tokens [ tokenIndex ].start;
mercurywaters 3:fab591fca1e7 82 }
mercurywaters 3:fab591fca1e7 83
faheem_chaudhary 4:ae34010d87e5 84 inline bool Json::tokenBooleanValue ( const int tokenIndex ) const
faheem_chaudhary 4:ae34010d87e5 85 {
faheem_chaudhary 4:ae34010d87e5 86 if ( type ( tokenIndex ) == JSMN_PRIMITIVE )
faheem_chaudhary 4:ae34010d87e5 87 {
faheem_chaudhary 4:ae34010d87e5 88 return matches ( tokenIndex, "true" );
faheem_chaudhary 4:ae34010d87e5 89 }
faheem_chaudhary 4:ae34010d87e5 90 return false;
faheem_chaudhary 4:ae34010d87e5 91 }
faheem_chaudhary 4:ae34010d87e5 92
mercurywaters 3:fab591fca1e7 93 #endif
mercurywaters 3:fab591fca1e7 94