PxPvdInternalByteStreams.h

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#ifndef PX_PVD_INTERNAL_BYTE_STREAMS_H
#define PX_PVD_INTERNAL_BYTE_STREAMS_H
 
#include "PxPvdByteStreams.h"
#include "PxPvdFoundation.h"
 
namespace physx
{
namespace pvdsdk
{
struct MemPvdInputStream : public PvdInputStream
{
    const uint8_t* mBegin;
    const uint8_t* mEnd;
    bool mGood;
 
    MemPvdInputStream(const uint8_t* beg = NULL, const uint8_t* end = NULL)
    {
        mBegin = beg;
        mEnd = end;
        mGood = true;
    }
 
    uint32_t size() const
    {
        return mGood ? static_cast<uint32_t>(mEnd - mBegin) : 0;
    }
    bool isGood() const
    {
        return mGood;
    }
 
    void setup(uint8_t* start, uint8_t* stop)
    {
        mBegin = start;
        mEnd = stop;
    }
 
    void nocopyRead(uint8_t*& buffer, uint32_t& len)
    {
        if(len == 0 || mGood == false)
        {
            len = 0;
            buffer = NULL;
            return;
        }
        uint32_t original = len;
        len = PxMin(len, size());
        if(mGood && len != original)
            mGood = false;
        buffer = const_cast<uint8_t*>(mBegin);
        mBegin += len;
    }
 
    virtual bool read(uint8_t* buffer, uint32_t& len)
    {
        if(len == 0)
            return true;
        uint32_t original = len;
        len = PxMin(len, size());
 
        physx::intrinsics::memCopy(buffer, mBegin, len);
        mBegin += len;
        if(len < original)
            physx::intrinsics::memZero(buffer + len, original - len);
        mGood = mGood && len == original;
        return mGood;
    }
};
}
}
#endif