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physx/source/foundation/include/PsUtilities.h

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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) 2008-2021 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 PSFOUNDATION_PSUTILITIES_H
+#define PSFOUNDATION_PSUTILITIES_H
+
+#include "foundation/PxVec3.h"
+#include "foundation/PxAssert.h"
+#include "Ps.h"
+#include "PsIntrinsics.h"
+#include "PsBasicTemplates.h"
+
+namespace physx
+{
+namespace shdfnd
+{
+PX_INLINE char littleEndian()
+{
+	int i = 1;
+	return *(reinterpret_cast<char*>(&i));
+}
+
+// PT: checked casts
+PX_CUDA_CALLABLE PX_FORCE_INLINE PxU32 to32(PxU64 value)
+{
+	PX_ASSERT(value <= 0xffffffff);
+	return PxU32(value);
+}
+PX_CUDA_CALLABLE PX_FORCE_INLINE PxU16 to16(PxU32 value)
+{
+	PX_ASSERT(value <= 0xffff);
+	return PxU16(value);
+}
+PX_CUDA_CALLABLE PX_FORCE_INLINE PxU8 to8(PxU16 value)
+{
+	PX_ASSERT(value <= 0xff);
+	return PxU8(value);
+}
+PX_CUDA_CALLABLE PX_FORCE_INLINE PxU8 to8(PxU32 value)
+{
+	PX_ASSERT(value <= 0xff);
+	return PxU8(value);
+}
+PX_CUDA_CALLABLE PX_FORCE_INLINE PxU8 to8(PxI32 value)
+{
+	PX_ASSERT(value <= 0xff);
+	PX_ASSERT(value >= 0);
+	return PxU8(value);
+}
+PX_CUDA_CALLABLE PX_FORCE_INLINE PxI8 toI8(PxU32 value)
+{
+	PX_ASSERT(value <= 0x7f);
+	return PxI8(value);
+}
+
+/*!
+Get number of elements in array
+*/
+template <typename T, size_t N>
+char (&ArraySizeHelper(T (&array)[N]))[N];
+#define PX_ARRAY_SIZE(_array) (sizeof(physx::shdfnd::ArraySizeHelper(_array)))
+
+/*!
+Sort two elements using operator<
+
+On return x will be the smaller of the two
+*/
+template <class T>
+PX_CUDA_CALLABLE PX_FORCE_INLINE void order(T& x, T& y)
+{
+	if(y < x)
+		swap(x, y);
+}
+
+// most architectures can do predication on real comparisons, and on VMX, it matters
+
+PX_CUDA_CALLABLE PX_FORCE_INLINE void order(PxReal& x, PxReal& y)
+{
+	PxReal newX = PxMin(x, y);
+	PxReal newY = PxMax(x, y);
+	x = newX;
+	y = newY;
+}
+
+/*!
+Sort two elements using operator< and also keep order
+of any extra data
+*/
+template <class T, class E1>
+PX_CUDA_CALLABLE PX_FORCE_INLINE void order(T& x, T& y, E1& xe1, E1& ye1)
+{
+	if(y < x)
+	{
+		swap(x, y);
+		swap(xe1, ye1);
+	}
+}
+
+#if PX_GCC_FAMILY && !PX_EMSCRIPTEN  && !PX_LINUX
+__attribute__((noreturn))
+#endif
+    PX_INLINE void debugBreak()
+{
+#if PX_WINDOWS || PX_XBOXONE || PX_XBOX_SERIES_X
+	__debugbreak();
+#elif PX_ANDROID
+	raise(SIGTRAP); // works better than __builtin_trap. Proper call stack and can be continued.
+#elif PX_LINUX
+	asm("int $3");
+#elif PX_GCC_FAMILY
+	__builtin_trap();
+#else
+	PX_ASSERT(false);
+#endif
+}
+
+bool checkValid(const float&);
+bool checkValid(const PxVec3&);
+bool checkValid(const PxQuat&);
+bool checkValid(const PxMat33&);
+bool checkValid(const PxTransform&);
+bool checkValid(const char*);
+
+// equivalent to std::max_element
+template <typename T>
+inline const T* maxElement(const T* first, const T* last)
+{
+	const T* m = first;
+	for(const T* it = first + 1; it < last; ++it)
+		if(*m < *it)
+			m = it;
+
+	return m;
+}
+
+} // namespace shdfnd
+} // namespace physx
+
+#endif