PxUtilities.h

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// Copyright (c) 2008-2022 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 PX_UTILITIES_H
#define PX_UTILITIES_H
 
#include "foundation/PxVec3.h"
#include "foundation/PxAssert.h"
#include "foundation/PxIntrinsics.h"
#include "foundation/PxBasicTemplates.h"
 
#if !PX_DOXYGEN
namespace physx
{
#endif
PX_INLINE char PxLittleEndian()
{
    int i = 1;
    return *(reinterpret_cast<char*>(&i));
}
 
// PT: checked casts
PX_CUDA_CALLABLE PX_FORCE_INLINE PxU32 PxTo32(PxU64 value)
{
    PX_ASSERT(value <= 0xffffffff);
    return PxU32(value);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE PxU16 PxTo16(PxU32 value)
{
    PX_ASSERT(value <= 0xffff);
    return PxU16(value);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE PxU8 PxTo8(PxU16 value)
{
    PX_ASSERT(value <= 0xff);
    return PxU8(value);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE PxU8 PxTo8(PxU32 value)
{
    PX_ASSERT(value <= 0xff);
    return PxU8(value);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE PxU8 PxTo8(PxI32 value)
{
    PX_ASSERT(value <= 0xff);
    PX_ASSERT(value >= 0);
    return PxU8(value);
}
PX_CUDA_CALLABLE PX_FORCE_INLINE PxI8 PxToI8(PxU32 value)
{
    PX_ASSERT(value <= 0x7f);
    return PxI8(value);
}
 
 
template <typename T, size_t N>
char (&PxArraySizeHelper(T (&array)[N]))[N];
#define PX_ARRAY_SIZE(_array) (sizeof(physx::PxArraySizeHelper(_array)))
 
template <class T>
PX_CUDA_CALLABLE PX_FORCE_INLINE void PxOrder(T& x, T& y)
{
    if(y < x)
        PxSwap(x, y);
}
 
// most architectures can do predication on real comparisons, and on VMX, it matters
 
PX_CUDA_CALLABLE PX_FORCE_INLINE void PxOrder(PxReal& x, PxReal& y)
{
    PxReal newX = PxMin(x, y);
    PxReal newY = PxMax(x, y);
    x = newX;
    y = newY;
}
 
template <class T, class E1>
PX_CUDA_CALLABLE PX_FORCE_INLINE void PxOrder(T& x, T& y, E1& xe1, E1& ye1)
{
    if(y < x)
    {
        swap(x, y);
        swap(xe1, ye1);
    }
}
 
#if PX_GCC_FAMILY && !PX_EMSCRIPTEN
__attribute__((noreturn))
#endif
    PX_INLINE void PxDebugBreak()
{
#if PX_WINDOWS
    __debugbreak();
#elif PX_LINUX
    __builtin_trap();
#elif PX_GCC_FAMILY
    __builtin_trap();
#else
    PX_ASSERT(false);
#endif
}
 
#if !PX_DOXYGEN
} // namespace physx
#endif
 
#endif