system/ByteOrder: add `noexcept`
This commit is contained in:
Max Kellermann
parent
4f6c54ecb3
commit
cbcdc73f9a
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@ -74,39 +74,39 @@
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#endif
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constexpr bool
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IsLittleEndian()
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IsLittleEndian() noexcept
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{
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return IS_LITTLE_ENDIAN;
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}
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constexpr bool
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IsBigEndian()
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IsBigEndian() noexcept
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{
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return IS_BIG_ENDIAN;
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}
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constexpr uint16_t
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GenericByteSwap16(uint16_t value)
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GenericByteSwap16(uint16_t value) noexcept
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{
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return (value >> 8) | (value << 8);
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}
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constexpr uint32_t
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GenericByteSwap32(uint32_t value)
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GenericByteSwap32(uint32_t value) noexcept
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{
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return (value >> 24) | ((value >> 8) & 0x0000ff00) |
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((value << 8) & 0x00ff0000) | (value << 24);
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}
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constexpr uint64_t
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GenericByteSwap64(uint64_t value)
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GenericByteSwap64(uint64_t value) noexcept
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{
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return uint64_t(GenericByteSwap32(uint32_t(value >> 32)))
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| (uint64_t(GenericByteSwap32(value)) << 32);
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}
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constexpr uint16_t
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ByteSwap16(uint16_t value)
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ByteSwap16(uint16_t value) noexcept
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{
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#if CLANG_OR_GCC_VERSION(4,8)
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return __builtin_bswap16(value);
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@ -116,7 +116,7 @@ ByteSwap16(uint16_t value)
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}
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constexpr uint32_t
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ByteSwap32(uint32_t value)
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ByteSwap32(uint32_t value) noexcept
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{
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#if CLANG_OR_GCC_VERSION(4,3)
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return __builtin_bswap32(value);
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@ -126,7 +126,7 @@ ByteSwap32(uint32_t value)
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}
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constexpr uint64_t
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ByteSwap64(uint64_t value)
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ByteSwap64(uint64_t value) noexcept
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{
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#if CLANG_OR_GCC_VERSION(4,3)
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return __builtin_bswap64(value);
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@ -139,7 +139,7 @@ ByteSwap64(uint64_t value)
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* Converts a 16bit value from big endian to the system's byte order
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*/
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constexpr uint16_t
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FromBE16(uint16_t value)
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FromBE16(uint16_t value) noexcept
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{
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return IsBigEndian() ? value : ByteSwap16(value);
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}
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@ -148,7 +148,7 @@ FromBE16(uint16_t value)
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* Converts a 32bit value from big endian to the system's byte order
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*/
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constexpr uint32_t
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FromBE32(uint32_t value)
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FromBE32(uint32_t value) noexcept
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{
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return IsBigEndian() ? value : ByteSwap32(value);
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}
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@ -157,7 +157,7 @@ FromBE32(uint32_t value)
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* Converts a 64bit value from big endian to the system's byte order
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*/
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constexpr uint64_t
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FromBE64(uint64_t value)
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FromBE64(uint64_t value) noexcept
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{
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return IsBigEndian() ? value : ByteSwap64(value);
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}
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@ -166,7 +166,7 @@ FromBE64(uint64_t value)
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* Converts a 16bit value from little endian to the system's byte order
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*/
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constexpr uint16_t
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FromLE16(uint16_t value)
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FromLE16(uint16_t value) noexcept
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{
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return IsLittleEndian() ? value : ByteSwap16(value);
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}
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@ -175,7 +175,7 @@ FromLE16(uint16_t value)
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* Converts a 32bit value from little endian to the system's byte order
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*/
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constexpr uint32_t
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FromLE32(uint32_t value)
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FromLE32(uint32_t value) noexcept
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{
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return IsLittleEndian() ? value : ByteSwap32(value);
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}
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@ -184,7 +184,7 @@ FromLE32(uint32_t value)
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* Converts a 64bit value from little endian to the system's byte order
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*/
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constexpr uint64_t
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FromLE64(uint64_t value)
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FromLE64(uint64_t value) noexcept
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{
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return IsLittleEndian() ? value : ByteSwap64(value);
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}
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@ -193,7 +193,7 @@ FromLE64(uint64_t value)
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* Converts a 16bit value from the system's byte order to big endian
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*/
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constexpr uint16_t
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ToBE16(uint16_t value)
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ToBE16(uint16_t value) noexcept
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{
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return IsBigEndian() ? value : ByteSwap16(value);
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}
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@ -202,7 +202,7 @@ ToBE16(uint16_t value)
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* Converts a 32bit value from the system's byte order to big endian
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*/
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constexpr uint32_t
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ToBE32(uint32_t value)
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ToBE32(uint32_t value) noexcept
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{
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return IsBigEndian() ? value : ByteSwap32(value);
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}
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@ -211,7 +211,7 @@ ToBE32(uint32_t value)
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* Converts a 64bit value from the system's byte order to big endian
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*/
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constexpr uint64_t
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ToBE64(uint64_t value)
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ToBE64(uint64_t value) noexcept
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{
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return IsBigEndian() ? value : ByteSwap64(value);
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}
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@ -220,7 +220,7 @@ ToBE64(uint64_t value)
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* Converts a 16bit value from the system's byte order to little endian
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*/
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constexpr uint16_t
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ToLE16(uint16_t value)
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ToLE16(uint16_t value) noexcept
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{
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return IsLittleEndian() ? value : ByteSwap16(value);
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}
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@ -229,7 +229,7 @@ ToLE16(uint16_t value)
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* Converts a 32bit value from the system's byte order to little endian
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*/
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constexpr uint32_t
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ToLE32(uint32_t value)
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ToLE32(uint32_t value) noexcept
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{
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return IsLittleEndian() ? value : ByteSwap32(value);
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}
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@ -238,7 +238,7 @@ ToLE32(uint32_t value)
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* Converts a 64bit value from the system's byte order to little endian
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*/
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constexpr uint64_t
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ToLE64(uint64_t value)
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ToLE64(uint64_t value) noexcept
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{
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return IsLittleEndian() ? value : ByteSwap64(value);
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}
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