Diff: Json.h

Revision:

3:fab591fca1e7

Child:

4:ae34010d87e5

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Json.h	Thu Jun 02 06:08:24 2016 +0000
@@ -0,0 +1,82 @@
+#ifndef __JSON_LIB_CLASS_H_
+#define __JSON_LIB_CLASS_H_
+
+#include "jsmn.h"
+#include <stdlib.h>
+#include <string.h>
+
+/**
+ * JSON wrapper over JSMN lib
+ */
+
+class Json
+{
+    private:
+        const char * source;
+        const size_t sourceLength;
+        jsmntok_t * tokens;
+        int tokenCount;
+        Json ( const Json & other );
+
+    public:
+        /** The only constructor allowed.  As JSON object will create/allocate
+         *  memory for it's working, in favor of small memory fottprints, it
+         *  is not allowed to be passed-by-value.  So there is no copy or 
+         *  default constructor
+         *  @param jsonString - char string containing JSON data
+         *  @param length - length of the jsonString
+         */
+        Json ( const char * jsonString, size_t length );
+        virtual ~Json ();
+
+        int findKeyIndexIn ( const char * key, const int &parentIndex ) const;
+        int findChildIndexOf ( const int &parentIndex, const int &startingAt ) const;
+        bool matches ( const int & tokenIndex, const char * value ) const;
+
+        inline bool isValidJson () const;
+        inline jsmntype_t type ( const int tokenIndex ) const;
+        inline int parent ( const int tokenIndex ) const;
+        inline int childCount ( const int tokenIndex ) const;
+        inline int tokenLength ( const int tokenIndex ) const;
+        inline const char * tokenAddress ( const int tokenIndex ) const;
+
+        int tokenIntegerValue ( const int tokenIndex ) const;
+        float tokenNumberValue ( const int tokenIndex ) const;
+
+        inline bool tokenBooleanValue ( const int tokenIndex ) const;
+
+        // void print () const;
+};
+
+inline bool Json::isValidJson () const
+{
+    return ( tokenCount >= 1 );
+}
+
+inline jsmntype_t Json::type ( const int tokenIndex ) const
+{
+    return tokens [ tokenIndex ].type;
+}
+
+inline int Json::parent ( const int tokenIndex ) const
+{
+    return tokens [ tokenIndex ].parent;
+}
+
+inline int Json::childCount ( const int tokenIndex ) const
+{
+    return tokens [ tokenIndex ].childCount;
+}
+
+inline int Json::tokenLength ( const int tokenIndex ) const
+{
+    return tokens [ tokenIndex ].end - tokens [ tokenIndex ].start;
+}
+
+inline const char * Json::tokenAddress ( const int tokenIndex ) const
+{
+    return source + tokens [ tokenIndex ].start;
+}
+
+#endif
+