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30 lines
1.3 KiB
C++
30 lines
1.3 KiB
C++
#pragma once
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#include <cstdint>
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#include <cstdlib> // for byte swapping
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// Byteswapping
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// Just in case this has been defined by platform
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#undef swap16
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#undef swap32
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#undef swap64
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#ifdef _WIN32
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inline uint16_t swap16(uint16_t _data) { return _byteswap_ushort(_data); }
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inline uint32_t swap32(uint32_t _data) { return _byteswap_ulong(_data); }
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inline uint64_t swap64(uint64_t _data) { return _byteswap_uint64(_data); }
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#elif defined(__GNUC__)
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inline uint16_t swap16(uint16_t _data) { return __builtin_bswap16(_data); }
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inline uint32_t swap32(uint32_t _data) { return __builtin_bswap32(_data); }
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inline uint64_t swap64(uint64_t _data) { return __builtin_bswap64(_data); }
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#else
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// Slow generic implementation. Hopefully this never hits
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inline uint16_t swap16(uint16_t data) { return (data >> 8) | (data << 8); }
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inline uint32_t swap32(uint32_t data) { return (swap16(data) << 16) | swap16(data >> 16); }
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inline uint64_t swap64(uint64_t data) { return ((uint64_t)swap32(data) << 32) | swap32(data >> 32); }
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#endif
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inline uint16_t swap16(const uint8_t* _pData) { return swap16(*(const uint16_t*)_pData); }
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inline uint32_t swap32(const uint8_t* _pData) { return swap32(*(const uint32_t*)_pData); }
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inline uint64_t swap64(const uint8_t* _pData) { return swap64(*(const uint64_t*)_pData); }
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