PxPvdBits.h

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// Copyright (c) 2008-2022 NVIDIA Corporation. All rights reserved.
 
#ifndef PX_PVD_BITS_H
#define PX_PVD_BITS_H
 
#include "PxPvdObjectModelBaseTypes.h"
 
namespace physx
{
namespace pvdsdk
{
 
// Marshallers cannot assume src is aligned, but they can assume dest is aligned.
typedef void (*TSingleMarshaller)(const uint8_t* src, uint8_t* dest);
typedef void (*TBlockMarshaller)(const uint8_t* src, uint8_t* dest, uint32_t numItems);
 
template <uint8_t ByteCount>
static inline void doSwapBytes(uint8_t* __restrict inData)
{
    for(uint32_t idx = 0; idx < ByteCount / 2; ++idx)
    {
        uint32_t endIdx = ByteCount - idx - 1;
        uint8_t theTemp = inData[idx];
        inData[idx] = inData[endIdx];
        inData[endIdx] = theTemp;
    }
}
 
template <uint8_t ByteCount>
static inline void doSwapBytes(uint8_t* __restrict inData, uint32_t itemCount)
{
    uint8_t* end = inData + itemCount * ByteCount;
    for(; inData < end; inData += ByteCount)
        doSwapBytes<ByteCount>(inData);
}
 
static inline void swapBytes(uint8_t* __restrict dataPtr, uint32_t numBytes, uint32_t itemWidth)
{
    uint32_t numItems = numBytes / itemWidth;
    switch(itemWidth)
    {
    case 1:
        break;
    case 2:
        doSwapBytes<2>(dataPtr, numItems);
        break;
    case 4:
        doSwapBytes<4>(dataPtr, numItems);
        break;
    case 8:
        doSwapBytes<8>(dataPtr, numItems);
        break;
    case 16:
        doSwapBytes<16>(dataPtr, numItems);
        break;
    default:
        PX_ASSERT(false);
        break;
    }
}
 
static inline void swapBytes(uint8_t&)
{
}
static inline void swapBytes(int8_t&)
{
}
static inline void swapBytes(uint16_t& inData)
{
    doSwapBytes<2>(reinterpret_cast<uint8_t*>(&inData));
}
static inline void swapBytes(int16_t& inData)
{
    doSwapBytes<2>(reinterpret_cast<uint8_t*>(&inData));
}
static inline void swapBytes(uint32_t& inData)
{
    doSwapBytes<4>(reinterpret_cast<uint8_t*>(&inData));
}
static inline void swapBytes(int32_t& inData)
{
    doSwapBytes<4>(reinterpret_cast<uint8_t*>(&inData));
}
static inline void swapBytes(float& inData)
{
    doSwapBytes<4>(reinterpret_cast<uint8_t*>(&inData));
}
static inline void swapBytes(uint64_t& inData)
{
    doSwapBytes<8>(reinterpret_cast<uint8_t*>(&inData));
}
static inline void swapBytes(int64_t& inData)
{
    doSwapBytes<8>(reinterpret_cast<uint8_t*>(&inData));
}
static inline void swapBytes(double& inData)
{
    doSwapBytes<8>(reinterpret_cast<uint8_t*>(&inData));
}
 
static inline bool checkLength(const uint8_t* inStart, const uint8_t* inStop, uint32_t inLength)
{
    return static_cast<uint32_t>(inStop - inStart) >= inLength;
}
}
}
#endif