SnXmlDeserializer.h

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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
 
#ifndef SN_XML_DESERIALIZER_H
#define SN_XML_DESERIALIZER_H
 
#include "SnXmlVisitorReader.h"
 
namespace physx { namespace Sn {
    
    //Definitions needed internally in the Serializer headers.
    template<typename TTriIndexElem>
    struct Triangle
    {
        TTriIndexElem mIdx0;
        TTriIndexElem mIdx1;
        TTriIndexElem mIdx2;
        Triangle( TTriIndexElem inIdx0 = 0, TTriIndexElem inIdx1 = 0, TTriIndexElem inIdx2 = 0)
            : mIdx0( inIdx0 )
            , mIdx1( inIdx1 )
            , mIdx2( inIdx2 )
        {
        }
    };
 
    struct XmlMemoryAllocateMemoryPoolAllocator
    {
        XmlMemoryAllocator* mAllocator;
        XmlMemoryAllocateMemoryPoolAllocator( XmlMemoryAllocator* inAlloc ) : mAllocator( inAlloc ) {}
 
        PxU8* allocate( PxU32 inSize ) { return mAllocator->allocate( inSize ); }
        void deallocate( PxU8* inMem ) { mAllocator->deallocate( inMem ); }
    };
 
    inline bool isEmpty(const char *s)
    {
        while (*s != '\0')
        {
            if (!isspace(*s))
                return false;
            s++;
        }
        return true;
    }
 
    inline void strtoLong( Triangle<PxU32>& ioDatatype,const char*& ioData )
    {
        strto( ioDatatype.mIdx0, ioData );
        strto( ioDatatype.mIdx1, ioData );
        strto( ioDatatype.mIdx2, ioData );
    }
 
    inline void strtoLong( PxHeightFieldSample& ioDatatype,const char*& ioData )
    {
        PxU32 tempData;
        strto( tempData, ioData );
        if ( isBigEndian() )
        {
            PxU32& theItem(tempData);
            PxU32 theDest = 0;
            PxU8* theReadPtr( reinterpret_cast< PxU8* >( &theItem ) );
            PxU8* theWritePtr( reinterpret_cast< PxU8* >( &theDest ) );
            //A height field sample is a 16 bit number
            //followed by two bytes.
 
            //We write this out as a 32 bit integer, LE.
            //Thus, on a big endian, we need to move the bytes
            //around a bit.
            //LE - 1 2 3 4
            //BE - 4 3 2 1 - after convert from xml number
            //Correct BE - 2 1 3 4, just like LE but with the 16 number swapped
            theWritePtr[0] = theReadPtr[2];
            theWritePtr[1] = theReadPtr[3];
            theWritePtr[2] = theReadPtr[1];
            theWritePtr[3] = theReadPtr[0];
            theItem = theDest;
        }
        ioDatatype = *reinterpret_cast<PxHeightFieldSample*>( &tempData );
    }
 
    template<typename TDataType>
    inline void readStridedFlagsProperty( XmlReader& ioReader, const char* inPropName, TDataType*& outData, PxU32& outStride, PxU32& outCount, XmlMemoryAllocator& inAllocator,
          const PxU32ToName* inConversions)
    {
        const char* theSrcData;
        outStride = sizeof( TDataType );
        outData = NULL;
        outCount = 0;
        if ( ioReader.read( inPropName, theSrcData ) )
        {
            XmlMemoryAllocateMemoryPoolAllocator tempAllocator( &inAllocator );
            MemoryBufferBase<XmlMemoryAllocateMemoryPoolAllocator> tempBuffer( &tempAllocator );
 
            if ( theSrcData )
            {
                static PxU32 theCount = 0;
                ++theCount;
                char* theStartData = const_cast< char*>( copyStr( &tempAllocator, theSrcData ) );
                char* aData = strtok(theStartData, " \n");
                while( aData )
                {
                    TDataType tempValue;
                    stringToFlagsType( aData, inAllocator, tempValue, inConversions );                      
                    aData = strtok(NULL," \n");
                    tempBuffer.write( &tempValue, sizeof(TDataType) );
                }
                outData = reinterpret_cast< TDataType* >( tempBuffer.mBuffer );
                outCount = tempBuffer.mWriteOffset / sizeof( TDataType );
                tempAllocator.deallocate( reinterpret_cast<PxU8*>(theStartData) );
            }
            tempBuffer.releaseBuffer();
        }
    }
 
    template<typename TDataType>
    inline void readStridedBufferProperty( XmlReader& ioReader, const char* inPropName, TDataType*& outData, PxU32& outStride, PxU32& outCount, XmlMemoryAllocator& inAllocator)
    {
        const char* theSrcData;
        outStride = sizeof( TDataType );
        outData = NULL;
        outCount = 0;
        if ( ioReader.read( inPropName, theSrcData ) )
        {
            XmlMemoryAllocateMemoryPoolAllocator tempAllocator( &inAllocator );
            MemoryBufferBase<XmlMemoryAllocateMemoryPoolAllocator> tempBuffer( &tempAllocator );
 
            if ( theSrcData )
            {
                static PxU32 theCount = 0;
                ++theCount;
                char* theStartData = const_cast< char*>( copyStr( &tempAllocator, theSrcData ) );
                const char* theData = theStartData;
                while( !isEmpty(theData) )
                {
                    //These buffers are whitespace delimited.
                    TDataType theType;
                    strtoLong( theType, theData );
                    tempBuffer.write( &theType, sizeof(theType) );
                }
                outData = reinterpret_cast< TDataType* >( tempBuffer.mBuffer );
                outCount = tempBuffer.mWriteOffset / sizeof( TDataType );
                tempAllocator.deallocate( reinterpret_cast<PxU8*>(theStartData) );
            }
            tempBuffer.releaseBuffer();
        }
    }
    
    template<typename TDataType>
    inline void readStridedBufferProperty( XmlReader& ioReader, const char* inPropName, PxStridedData& ioData, PxU32& outCount, XmlMemoryAllocator& inAllocator)
    {
        TDataType* tempData = NULL;
        readStridedBufferProperty<TDataType>( ioReader, inPropName, tempData, ioData.stride, outCount, inAllocator ); 
        ioData.data = tempData;
    }
    
    template<typename TDataType>
    inline void readStridedBufferProperty( XmlReader& ioReader, const char* inPropName, PxTypedStridedData<TDataType>& ioData, PxU32& outCount, XmlMemoryAllocator& inAllocator)
    {
        TDataType* tempData = NULL;
        readStridedBufferProperty<TDataType>( ioReader, inPropName, tempData, ioData.stride, outCount, inAllocator );
        ioData.data = reinterpret_cast<PxMaterialTableIndex*>( tempData );
    }
 
    template<typename TDataType>
    inline void readStridedBufferProperty( XmlReader& ioReader, const char* inPropName, PxBoundedData& ioData, XmlMemoryAllocator& inAllocator)
    {
        return readStridedBufferProperty<TDataType>( ioReader, inPropName, ioData, ioData.count, inAllocator );
    }
 
} }
 
#endif