cJSONReader.h

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//
#ifndef _INC_cJSONReader_H
#define _INC_cJSONReader_H
#ifndef NO_PRAGMA_ONCE
#pragma once
#endif
 
#include "cJSON.h"
#include "GrayCore/include/cTextPos.h"
#include "GrayCore/include/cException.h"
 
namespace GrayLib
{
        class cJSONReader;
 
        class GRAYLIB_LINK cJSONReadVisitor : public cJSON
        {
 
        public:
                void* m_pVal;           
 
        public:
                cJSONReadVisitor(void* pVal)
                        : m_pVal(pVal)
                {
                }
 
                virtual void SetNull() = 0;
                virtual void SetBool(bool bVal) = 0;
                virtual void SetDouble(double dVal) = 0;
                virtual void SetString(const char* pszString, StrLen_t nLen) = 0;
 
                virtual void SetArray() = 0;
                virtual void SetMap() = 0;
 
                // create new child object. return nullptr = ERROR_CANCELED.
                virtual void* MakeArrayElement(cJSONReader& r, ITERATE_t i) = 0;
                virtual void* MakeMapElement(cJSONReader& r, const char* pszTag) = 0;
        };
 
        class GRAYLIB_LINK cJSONReadVariant : public cJSONReadVisitor
        {
 
                typedef cJSONReadVisitor SUPER_t;
 
        public:
                cJSONReadVariant(cVariant& v);
 
                cVariant& get_V()
                {
                        return *((cVariant*)m_pVal);
                }
 
                virtual void SetNull() override;
                virtual void SetBool(bool bVal) override;
                virtual void SetDouble(double dVal) override;
                virtual void SetString(const char* pszString, StrLen_t nLen) override;
 
                virtual void SetArray() override;
                virtual void SetMap() override;
 
                // create new child object. return nullptr = ERROR_CANCELED.
                virtual void* MakeArrayElement(cJSONReader& r, ITERATE_t i) override;
                virtual void* MakeMapElement(cJSONReader& r, const char* pszTag) override;
        };
 
        class GRAYLIB_LINK cJSONReader : public cTextReader, public cJSON
        {
                typedef cTextReader SUPER_t;
 
        public:
                int m_iDepth;                   
 
        protected:
                bool ReadWhitespace();
 
                HRESULT ReadString(char* pszOut, StrLen_t nSizeMax);
                HRESULT ReadString(cJSONReadVisitor& rVisit);
                HRESULT ReadArray(cJSONReadVisitor& rVisit);
                HRESULT ReadMapElementName(OUT ATOMCHAR_t* pszName);
                HRESULT ReadMap(cJSONReadVisitor& rVisit);
 
        public:
                cJSONReader(const char* pszVal, StrLen_t nStrLenMax = StrT::k_LEN_MAX, StrLen_t iTabSize = cStrConst::k_TabSize);
                cJSONReader(const cMemBlock& b, StrLen_t iTabSize = cStrConst::k_TabSize);
                ~cJSONReader();
 
                HRESULT ReturnError(HRESULT hRes) const;
                HRESULT ReadVisitor(cJSONReadVisitor& rVisit);
                HRESULT ReadVar(OUT cVariant& rVar);
 
                static HRESULT GRAYCALL ReadVar(cStreamInput& stmIn, OUT cVariant& rVar);
        };
}
 
#endif