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//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2008-2018 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
#ifndef GU_SERIALIZE_H
#define GU_SERIALIZE_H
#include "foundation/PxSimpleTypes.h"
#include "foundation/PxIO.h"
#include "CmPhysXCommon.h"
#include "PxPhysXCommonConfig.h"
#include "PsUtilities.h"
namespace physx
{
PX_INLINE void flip(PxU16& v)
{
PxU8* b = reinterpret_cast<PxU8*>(&v);
PxU8 temp = b[0];
b[0] = b[1];
b[1] = temp;
}
PX_INLINE void flip(PxI16& v)
{
PxI8* b = reinterpret_cast<PxI8*>(&v);
PxI8 temp = b[0];
b[0] = b[1];
b[1] = temp;
}
PX_INLINE void flip(PxU32& v)
{
PxU8* b = reinterpret_cast<PxU8*>(&v);
PxU8 temp = b[0];
b[0] = b[3];
b[3] = temp;
temp = b[1];
b[1] = b[2];
b[2] = temp;
}
// MS: It is important to modify the value directly and not use a temporary variable or a return
// value. The reason for this is that a flipped float might have a bit pattern which indicates
// an invalid float. If such a float is assigned to another float, the bit pattern
// can change again (maybe to map invalid floats to a common invalid pattern?).
// When reading the float and flipping again, the changed bit pattern will result in a different
// float than the original one.
PX_INLINE void flip(PxF32& v)
{
PxU8* b = reinterpret_cast<PxU8*>(&v);
PxU8 temp = b[0];
b[0] = b[3];
b[3] = temp;
temp = b[1];
b[1] = b[2];
b[2] = temp;
}
PX_INLINE void writeChunk(PxI8 a, PxI8 b, PxI8 c, PxI8 d, PxOutputStream& stream)
{
stream.write(&a, sizeof(PxI8));
stream.write(&b, sizeof(PxI8));
stream.write(&c, sizeof(PxI8));
stream.write(&d, sizeof(PxI8));
}
void readChunk(PxI8& a, PxI8& b, PxI8& c, PxI8& d, PxInputStream& stream);
PxU16 readWord(bool mismatch, PxInputStream& stream);
PX_PHYSX_COMMON_API PxU32 readDword(bool mismatch, PxInputStream& stream);
PxF32 readFloat(bool mismatch, PxInputStream& stream);
PX_PHYSX_COMMON_API void writeWord(PxU16 value, bool mismatch, PxOutputStream& stream);
PX_PHYSX_COMMON_API void writeDword(PxU32 value, bool mismatch, PxOutputStream& stream);
PX_PHYSX_COMMON_API void writeFloat(PxF32 value, bool mismatch, PxOutputStream& stream);
bool readFloatBuffer(PxF32* dest, PxU32 nbFloats, bool mismatch, PxInputStream& stream);
PX_PHYSX_COMMON_API void writeFloatBuffer(const PxF32* src, PxU32 nb, bool mismatch, PxOutputStream& stream);
PX_PHYSX_COMMON_API void writeWordBuffer(const PxU16* src, PxU32 nb, bool mismatch, PxOutputStream& stream);
void readWordBuffer(PxU16* dest, PxU32 nb, bool mismatch, PxInputStream& stream);
PX_PHYSX_COMMON_API bool writeHeader(PxI8 a, PxI8 b, PxI8 c, PxI8 d, PxU32 version, bool mismatch, PxOutputStream& stream);
bool readHeader(PxI8 a, PxI8 b, PxI8 c, PxI8 d, PxU32& version, bool& mismatch, PxInputStream& stream);
PX_INLINE bool readIntBuffer(PxU32* dest, PxU32 nbInts, bool mismatch, PxInputStream& stream)
{
return readFloatBuffer(reinterpret_cast<PxF32*>(dest), nbInts, mismatch, stream);
}
PX_INLINE void writeIntBuffer(const PxU32* src, PxU32 nb, bool mismatch, PxOutputStream& stream)
{
writeFloatBuffer(reinterpret_cast<const PxF32*>(src), nb, mismatch, stream);
}
PX_INLINE bool ReadDwordBuffer(PxU32* dest, PxU32 nb, bool mismatch, PxInputStream& stream)
{
return readFloatBuffer(reinterpret_cast<float*>(dest), nb, mismatch, stream);
}
PX_INLINE void WriteDwordBuffer(const PxU32* src, PxU32 nb, bool mismatch, PxOutputStream& stream)
{
writeFloatBuffer(reinterpret_cast<const float*>(src), nb, mismatch, stream);
}
PX_PHYSX_COMMON_API PxU32 computeMaxIndex(const PxU32* indices, PxU32 nbIndices);
PX_PHYSX_COMMON_API PxU16 computeMaxIndex(const PxU16* indices, PxU32 nbIndices);
PX_PHYSX_COMMON_API void storeIndices(PxU32 maxIndex, PxU32 nbIndices, const PxU32* indices, PxOutputStream& stream, bool platformMismatch);
PX_PHYSX_COMMON_API void readIndices(PxU32 maxIndex, PxU32 nbIndices, PxU32* indices, PxInputStream& stream, bool platformMismatch);
// PT: see PX-1163
PX_FORCE_INLINE bool readBigEndianVersionNumber(PxInputStream& stream, bool mismatch_, PxU32& fileVersion, bool& mismatch)
{
// PT: allright this is going to be subtle:
// - in version 1 the data was always saved in big-endian format
// - *including the version number*!
// - so we cannot just read the version "as usual" using the passed mismatch param
// PT: mismatch value for version 1
mismatch = (shdfnd::littleEndian() == 1);
const PxU32 rawFileVersion = readDword(false, stream);
if(rawFileVersion==1)
{
// PT: this is a version-1 file with no flip
fileVersion = 1;
PX_ASSERT(!mismatch);
}
else
{
PxU32 fileVersionFlipped = rawFileVersion;
flip(fileVersionFlipped);
if(fileVersionFlipped==1)
{
// PT: this is a version-1 file with flip
fileVersion = 1;
PX_ASSERT(mismatch);
}
else
{
// PT: this is at least version 2 so we can process it "as usual"
mismatch = mismatch_;
fileVersion = mismatch_ ? fileVersionFlipped : rawFileVersion;
}
}
PX_ASSERT(fileVersion<=2);
if(fileVersion>2)
return false;
return true;
}
// PT: TODO: copied from IceSerialize.h, still needs to be refactored/cleaned up.
namespace Gu
{
PX_PHYSX_COMMON_API bool WriteHeader(PxU8 a, PxU8 b, PxU8 c, PxU8 d, PxU32 version, bool mismatch, PxOutputStream& stream);
PX_PHYSX_COMMON_API bool ReadHeader(PxU8 a_, PxU8 b_, PxU8 c_, PxU8 d_, PxU32& version, bool& mismatch, PxInputStream& stream);
PX_PHYSX_COMMON_API void StoreIndices(PxU32 maxIndex, PxU32 nbIndices, const PxU32* indices, PxOutputStream& stream, bool platformMismatch);
void ReadIndices(PxU32 maxIndex, PxU32 nbIndices, PxU32* indices, PxInputStream& stream, bool platformMismatch);
PX_PHYSX_COMMON_API void StoreIndices(PxU16 maxIndex, PxU32 nbIndices, const PxU16* indices, PxOutputStream& stream, bool platformMismatch);
void ReadIndices(PxU16 maxIndex, PxU32 nbIndices, PxU16* indices, PxInputStream& stream, bool platformMismatch);
}
}
#endif
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