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https://github.com/RetroDECK/Supermodel.git
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51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#include "Util/ByteSwap.h"
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#ifdef _MSC_VER
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#include <intrin.h>
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#endif
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namespace Util
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{
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void FlipEndian16(uint8_t * const buffer, const size_t size)
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{
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#ifdef _MSC_VER
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uint16_t * const buffer16 = (uint16_t*)buffer;
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for (size_t i = 0; i < size/2; i++)
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buffer16[i] = _byteswap_ushort(buffer16[i]);
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#elif defined(__GNUC__)
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uint16_t * const buffer16 = (uint16_t*)buffer;
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for (size_t i = 0; i < size/2; i++)
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buffer16[i] = __builtin_bswap16(buffer16[i]);
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#else
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for (size_t i = 0; i < (size & ~1); i += 2)
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{
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uint8_t tmp = buffer[i + 0];
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buffer[i + 0] = buffer[i + 1];
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buffer[i + 1] = tmp;
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}
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#endif
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}
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void FlipEndian32(uint8_t * const buffer, const size_t size)
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{
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#ifdef _MSC_VER
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uint32_t * const buffer32 = (uint32_t*)buffer;
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for (size_t i = 0; i < size/4; i++)
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buffer32[i] = _byteswap_ulong(buffer32[i]);
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#elif defined(__GNUC__)
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uint32_t * const buffer32 = (uint32_t*)buffer;
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for (size_t i = 0; i < size/4; i++)
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buffer32[i] = __builtin_bswap32(buffer32[i]);
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#else
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for (size_t i = 0; i < (size & ~3); i += 4)
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{
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uint8_t tmp1 = buffer[i+0];
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uint8_t tmp2 = buffer[i+1];
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buffer[i+0] = buffer[i+3];
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buffer[i+1] = buffer[i+2];
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buffer[i+2] = tmp2;
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buffer[i+3] = tmp1;
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}
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#endif
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}
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} // Util
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