37 lines
1.3 KiB
C++
37 lines
1.3 KiB
C++
#pragma once
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#include <cstdlib>
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#include <cstdint>
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#include <bit>
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namespace Feather
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{
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enum class Endian
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{
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Little,
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Big
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};
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// TODO: Make this constexpr
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inline uint8_t ReverseBytes(uint8_t n) { return n; }
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#ifdef __GNUC__
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inline uint16_t ReverseBytes(uint16_t n) { return __builtin_bswap16(n); }
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inline uint32_t ReverseBytes(uint32_t n) { return __builtin_bswap32(n); }
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inline uint64_t ReverseBytes(uint64_t n) { return __builtin_bswap64(n); }
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#else
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inline uint16_t ReverseBytes(uint16_t n) { return _byteswap_ushort(n); }
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inline uint32_t ReverseBytes(uint32_t n) { return _byteswap_ulong (n); }
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inline uint64_t ReverseBytes(uint64_t n) { return _byteswap_uint64(n); }
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#endif
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inline int8_t ReverseBytes(int8_t n) { return n; }
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inline int16_t ReverseBytes(int16_t n) { return int16_t(ReverseBytes(uint16_t(n))); }
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inline int32_t ReverseBytes(int32_t n) { return int32_t(ReverseBytes(uint32_t(n))); }
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inline int64_t ReverseBytes(int64_t n) { return int64_t(ReverseBytes(uint64_t(n))); }
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template <typename J, typename T>
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inline T ReverseBytesBitcast(T n) { return std::bit_cast<T>(ReverseBytes(std::bit_cast<J>(n))); }
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inline float ReverseBytes(float n) { return ReverseBytesBitcast<uint32_t>(n); }
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inline double ReverseBytes(double n) { return ReverseBytesBitcast<uint64_t>(n); }
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} |