Cleanup.

src/bx.cpp

@@ -0,0 +1,146 @@
+/*
+ * Copyright 2010-2017 Branimir Karadzic. All rights reserved.
+ * License: https://github.com/bkaradzic/bx#license-bsd-2-clause
+ */
+
+#include <bx/debug.h>
+#include <bx/readerwriter.h>
+
+#if !BX_CRT_NONE
+#	include <string.h> // memcpy, memmove, memset
+#endif // !BX_CRT_NONE
+
+namespace bx
+{
+	void xchg(void* _a, void* _b, size_t _numBytes)
+	{
+		uint8_t* lhs = (uint8_t*)_a;
+		uint8_t* rhs = (uint8_t*)_b;
+		const uint8_t* end = rhs + _numBytes;
+		while (rhs != end)
+		{
+			xchg(*lhs++, *rhs++);
+		}
+	}
+
+	void memCopyRef(void* _dst, const void* _src, size_t _numBytes)
+	{
+		uint8_t* dst = (uint8_t*)_dst;
+		const uint8_t* end = dst + _numBytes;
+		const uint8_t* src = (const uint8_t*)_src;
+		while (dst != end)
+		{
+			*dst++ = *src++;
+		}
+	}
+
+	void memCopy(void* _dst, const void* _src, size_t _numBytes)
+	{
+#if BX_CRT_NONE
+		memCopyRef(_dst, _src, _numBytes);
+#else
+		::memcpy(_dst, _src, _numBytes);
+#endif // BX_CRT_NONE
+	}
+
+	void memCopy(void* _dst, const void* _src, uint32_t _size, uint32_t _num, uint32_t _srcPitch, uint32_t _dstPitch)
+	{
+		const uint8_t* src = (const uint8_t*)_src;
+		uint8_t* dst = (uint8_t*)_dst;
+
+		for (uint32_t ii = 0; ii < _num; ++ii)
+		{
+			memCopy(dst, src, _size);
+			src += _srcPitch;
+			dst += _dstPitch;
+		}
+	}
+
+	///
+	void gather(void* _dst, const void* _src, uint32_t _size, uint32_t _num, uint32_t _srcPitch)
+	{
+		memCopy(_dst, _src, _size, _num, _srcPitch, _size);
+	}
+
+	///
+	void scatter(void* _dst, const void* _src, uint32_t _size, uint32_t _num, uint32_t _dstPitch)
+	{
+		memCopy(_dst, _src, _size, _num, _size, _dstPitch);
+	}
+
+	void memMoveRef(void* _dst, const void* _src, size_t _numBytes)
+	{
+		uint8_t* dst = (uint8_t*)_dst;
+		const uint8_t* src = (const uint8_t*)_src;
+
+		if (_numBytes == 0
+		||  dst == src)
+		{
+			return;
+		}
+
+		//	if (src+_numBytes <= dst || end <= src)
+		if (dst < src)
+		{
+			memCopy(_dst, _src, _numBytes);
+			return;
+		}
+
+		for (intptr_t ii = _numBytes-1; ii >= 0; --ii)
+		{
+			dst[ii] = src[ii];
+		}
+	}
+
+	void memMove(void* _dst, const void* _src, size_t _numBytes)
+	{
+#if BX_CRT_NONE
+		memMoveRef(_dst, _src, _numBytes);
+#else
+		::memmove(_dst, _src, _numBytes);
+#endif // BX_CRT_NONE
+	}
+
+	void memSetRef(void* _dst, uint8_t _ch, size_t _numBytes)
+	{
+		uint8_t* dst = (uint8_t*)_dst;
+		const uint8_t* end = dst + _numBytes;
+		while (dst != end)
+		{
+			*dst++ = char(_ch);
+		}
+	}
+
+	void memSet(void* _dst, uint8_t _ch, size_t _numBytes)
+	{
+#if BX_CRT_NONE
+		memSetRef(_dst, _ch, _numBytes);
+#else
+		::memset(_dst, _ch, _numBytes);
+#endif // BX_CRT_NONE
+	}
+
+	int32_t memCmpRef(const void* _lhs, const void* _rhs, size_t _numBytes)
+	{
+		const char* lhs = (const char*)_lhs;
+		const char* rhs = (const char*)_rhs;
+		for (
+			; 0 < _numBytes && *lhs == *rhs
+			; ++lhs, ++rhs, --_numBytes
+			)
+		{
+		}
+
+		return 0 == _numBytes ? 0 : *lhs - *rhs;
+	}
+
+	int32_t memCmp(const void* _lhs, const void* _rhs, size_t _numBytes)
+	{
+#if BX_CRT_NONE
+		return memCmpRef(_lhs, _rhs, _numBytes);
+#else
+		return ::memcmp(_lhs, _rhs, _numBytes);
+#endif // BX_CRT_NONE
+	}
+
+} // namespace bx