Add json support

[ric-plt/xapp-frame-cpp.git] / src / json / jhash.hpp

diff --git a/src/json/jhash.hpp b/src/json/jhash.hpp
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+++ b/src/json/jhash.hpp
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+// vi: ts=4 sw=4 noet:
+/*
+==================================================================================
+       Copyright (c) 2020 Nokia
+       Copyright (c) 2020 AT&T Intellectual Property.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================================
+*/
+
+/*
+       Mnemonic:       jhash.hpp
+       Abstract:       This class provides the ability to parse a json string into
+                               a hashtable, and exposes various functions that can be used
+                               to read the data from the hash.
+
+       Date:           26 June 2020
+       Author:         E. Scott Daniels
+*/
+
+#ifndef _JHASH_HPP
+#define _JHASH_HPP
+
+
+#include <string>
+
+// ------------------------------------------------------------------------
+
+class Jhash {
+       private:
+               void*   st;                                                     // the resulting symbol table generated by parse
+               void*   master_st;                                      // if user switches to a sub-blob; this tracks the original root st
+
+               Jhash& operator=( const Jhash& soi );   // jhashes cannot be copied because of underlying symbol table goo
+               Jhash( const Jhash& soi );
+
+       public:
+
+               Jhash( const char* jblob );                                     // builder
+               //Jhash( Message&& soi );                                               // mover
+               //Jhash& operator=( Message&& soi );                    // move operator
+               ~Jhash();                                                                       // destruction
+
+               bool Set_blob( const char* name );                                      // blob/root selection
+               void Unset_blob( );
+               bool Set_blob_ele( const char* name, int eidx );        // set from an array element
+
+               bool Parse_errors( );
+               void Dump();
+
+               std::string String( const char* name );                         // value fetching
+               double Value( const char* name );
+               bool Bool( const char* name );
+
+               bool Exists( const char* name );                                        // presence checking
+               bool Is_missing( const char* name );
+
+               bool Is_bool( const char* name );                                       // type checking functions
+               bool Is_null( const char* name );
+               bool Is_string( const char* name );
+               bool Is_value( const char* name );
+
+               int Array_len( const char* name );
+
+               bool Is_bool_ele( const char* name, int eidx );         // type of array element checks
+               bool Is_null_ele( const char* name, int eidx );
+               bool Is_string_ele( const char* name, int eidx );
+               bool Is_value_ele( const char* name, int eidx );
+
+               bool Bool_ele( const char* name, int eidx );                     // array oriented sussing functions
+               std::string String_ele( const char* name, int eidx );
+               double Value_ele( const char* name, int eidx );
+};
+
+
+#endif