mirror of
https://github.com/yuzu-emu/yuzu-android
synced 2024-12-27 13:11:20 -08:00
761 lines
19 KiB
C++
761 lines
19 KiB
C++
// Copyright (c) 2012- PPSSPP Project / Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include <type_traits>
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#if defined(_MSC_VER)
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#include <cstdlib>
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#elif defined(__linux__)
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#include <byteswap.h>
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#elif defined(__Bitrig__) || defined(__DragonFly__) || defined(__FreeBSD__) || \
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defined(__NetBSD__) || defined(__OpenBSD__)
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#include <sys/endian.h>
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#endif
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#include <cstring>
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#include "common/common_types.h"
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// GCC
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#ifdef __GNUC__
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#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) && !defined(COMMON_LITTLE_ENDIAN)
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#define COMMON_LITTLE_ENDIAN 1
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#elif __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) && !defined(COMMON_BIG_ENDIAN)
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#define COMMON_BIG_ENDIAN 1
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#endif
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// LLVM/clang
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#elif defined(__clang__)
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#if __LITTLE_ENDIAN__ && !defined(COMMON_LITTLE_ENDIAN)
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#define COMMON_LITTLE_ENDIAN 1
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#elif __BIG_ENDIAN__ && !defined(COMMON_BIG_ENDIAN)
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#define COMMON_BIG_ENDIAN 1
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#endif
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// MSVC
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#elif defined(_MSC_VER) && !defined(COMMON_BIG_ENDIAN) && !defined(COMMON_LITTLE_ENDIAN)
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#define COMMON_LITTLE_ENDIAN 1
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#endif
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// Worst case, default to little endian.
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#if !COMMON_BIG_ENDIAN && !COMMON_LITTLE_ENDIAN
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#define COMMON_LITTLE_ENDIAN 1
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#endif
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namespace Common {
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#ifdef _MSC_VER
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inline u16 swap16(u16 _data) {
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return _byteswap_ushort(_data);
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}
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inline u32 swap32(u32 _data) {
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return _byteswap_ulong(_data);
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}
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inline u64 swap64(u64 _data) {
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return _byteswap_uint64(_data);
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}
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#elif defined(ARCHITECTURE_ARM) && (__ARM_ARCH >= 6)
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inline u16 swap16(u16 _data) {
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u32 data = _data;
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__asm__("rev16 %0, %1\n" : "=l"(data) : "l"(data));
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return (u16)data;
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}
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inline u32 swap32(u32 _data) {
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__asm__("rev %0, %1\n" : "=l"(_data) : "l"(_data));
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return _data;
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}
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inline u64 swap64(u64 _data) {
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return ((u64)swap32(_data) << 32) | swap32(_data >> 32);
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}
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#elif __linux__
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inline u16 swap16(u16 _data) {
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return bswap_16(_data);
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}
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inline u32 swap32(u32 _data) {
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return bswap_32(_data);
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}
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inline u64 swap64(u64 _data) {
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return bswap_64(_data);
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}
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#elif __APPLE__
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inline __attribute__((always_inline)) u16 swap16(u16 _data) {
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return (_data >> 8) | (_data << 8);
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}
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inline __attribute__((always_inline)) u32 swap32(u32 _data) {
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return __builtin_bswap32(_data);
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}
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inline __attribute__((always_inline)) u64 swap64(u64 _data) {
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return __builtin_bswap64(_data);
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}
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#elif defined(__Bitrig__) || defined(__OpenBSD__)
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// redefine swap16, swap32, swap64 as inline functions
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#undef swap16
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#undef swap32
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#undef swap64
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inline u16 swap16(u16 _data) {
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return __swap16(_data);
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}
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inline u32 swap32(u32 _data) {
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return __swap32(_data);
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}
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inline u64 swap64(u64 _data) {
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return __swap64(_data);
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}
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#elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__)
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inline u16 swap16(u16 _data) {
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return bswap16(_data);
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}
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inline u32 swap32(u32 _data) {
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return bswap32(_data);
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}
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inline u64 swap64(u64 _data) {
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return bswap64(_data);
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}
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#else
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// Slow generic implementation.
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inline u16 swap16(u16 data) {
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return (data >> 8) | (data << 8);
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}
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inline u32 swap32(u32 data) {
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return (swap16(data) << 16) | swap16(data >> 16);
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}
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inline u64 swap64(u64 data) {
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return ((u64)swap32(data) << 32) | swap32(data >> 32);
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}
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#endif
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inline float swapf(float f) {
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static_assert(sizeof(u32) == sizeof(float), "float must be the same size as uint32_t.");
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u32 value;
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std::memcpy(&value, &f, sizeof(u32));
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value = swap32(value);
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std::memcpy(&f, &value, sizeof(u32));
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return f;
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}
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inline double swapd(double f) {
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static_assert(sizeof(u64) == sizeof(double), "double must be the same size as uint64_t.");
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u64 value;
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std::memcpy(&value, &f, sizeof(u64));
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value = swap64(value);
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std::memcpy(&f, &value, sizeof(u64));
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return f;
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}
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} // Namespace Common
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template <typename T, typename F>
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struct swap_struct_t {
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using swapped_t = swap_struct_t;
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protected:
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T value;
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static T swap(T v) {
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return F::swap(v);
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}
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public:
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T swap() const {
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return swap(value);
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}
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swap_struct_t() = default;
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swap_struct_t(const T& v) : value(swap(v)) {}
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template <typename S>
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swapped_t& operator=(const S& source) {
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value = swap(static_cast<T>(source));
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return *this;
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}
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operator s8() const {
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return static_cast<s8>(swap());
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}
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operator u8() const {
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return static_cast<u8>(swap());
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}
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operator s16() const {
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return static_cast<s16>(swap());
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}
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operator u16() const {
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return static_cast<u16>(swap());
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}
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operator s32() const {
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return static_cast<s32>(swap());
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}
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operator u32() const {
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return static_cast<u32>(swap());
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}
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operator s64() const {
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return static_cast<s64>(swap());
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}
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operator u64() const {
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return static_cast<u64>(swap());
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}
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operator float() const {
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return static_cast<float>(swap());
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}
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operator double() const {
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return static_cast<double>(swap());
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}
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// +v
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swapped_t operator+() const {
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return +swap();
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}
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// -v
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swapped_t operator-() const {
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return -swap();
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}
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// v / 5
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swapped_t operator/(const swapped_t& i) const {
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return swap() / i.swap();
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}
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template <typename S>
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swapped_t operator/(const S& i) const {
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return swap() / i;
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}
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// v * 5
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swapped_t operator*(const swapped_t& i) const {
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return swap() * i.swap();
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}
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template <typename S>
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swapped_t operator*(const S& i) const {
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return swap() * i;
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}
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// v + 5
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swapped_t operator+(const swapped_t& i) const {
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return swap() + i.swap();
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}
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template <typename S>
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swapped_t operator+(const S& i) const {
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return swap() + static_cast<T>(i);
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}
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// v - 5
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swapped_t operator-(const swapped_t& i) const {
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return swap() - i.swap();
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}
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template <typename S>
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swapped_t operator-(const S& i) const {
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return swap() - static_cast<T>(i);
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}
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// v += 5
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swapped_t& operator+=(const swapped_t& i) {
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value = swap(swap() + i.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator+=(const S& i) {
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value = swap(swap() + static_cast<T>(i));
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return *this;
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}
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// v -= 5
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swapped_t& operator-=(const swapped_t& i) {
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value = swap(swap() - i.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator-=(const S& i) {
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value = swap(swap() - static_cast<T>(i));
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return *this;
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}
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// ++v
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swapped_t& operator++() {
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value = swap(swap() + 1);
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return *this;
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}
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// --v
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swapped_t& operator--() {
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value = swap(swap() - 1);
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return *this;
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}
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// v++
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swapped_t operator++(int) {
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swapped_t old = *this;
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value = swap(swap() + 1);
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return old;
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}
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// v--
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swapped_t operator--(int) {
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swapped_t old = *this;
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value = swap(swap() - 1);
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return old;
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}
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// Comparaison
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// v == i
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bool operator==(const swapped_t& i) const {
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return swap() == i.swap();
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}
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template <typename S>
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bool operator==(const S& i) const {
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return swap() == i;
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}
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// v != i
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bool operator!=(const swapped_t& i) const {
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return swap() != i.swap();
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}
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template <typename S>
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bool operator!=(const S& i) const {
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return swap() != i;
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}
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// v > i
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bool operator>(const swapped_t& i) const {
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return swap() > i.swap();
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}
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template <typename S>
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bool operator>(const S& i) const {
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return swap() > i;
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}
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// v < i
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bool operator<(const swapped_t& i) const {
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return swap() < i.swap();
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}
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template <typename S>
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bool operator<(const S& i) const {
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return swap() < i;
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}
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// v >= i
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bool operator>=(const swapped_t& i) const {
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return swap() >= i.swap();
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}
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template <typename S>
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bool operator>=(const S& i) const {
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return swap() >= i;
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}
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// v <= i
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bool operator<=(const swapped_t& i) const {
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return swap() <= i.swap();
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}
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template <typename S>
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bool operator<=(const S& i) const {
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return swap() <= i;
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}
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// logical
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swapped_t operator!() const {
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return !swap();
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}
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// bitmath
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swapped_t operator~() const {
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return ~swap();
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}
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swapped_t operator&(const swapped_t& b) const {
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return swap() & b.swap();
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}
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template <typename S>
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swapped_t operator&(const S& b) const {
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return swap() & b;
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}
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swapped_t& operator&=(const swapped_t& b) {
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value = swap(swap() & b.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator&=(const S b) {
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value = swap(swap() & b);
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return *this;
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}
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swapped_t operator|(const swapped_t& b) const {
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return swap() | b.swap();
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}
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template <typename S>
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swapped_t operator|(const S& b) const {
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return swap() | b;
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}
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swapped_t& operator|=(const swapped_t& b) {
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value = swap(swap() | b.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator|=(const S& b) {
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value = swap(swap() | b);
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return *this;
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}
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swapped_t operator^(const swapped_t& b) const {
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return swap() ^ b.swap();
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}
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template <typename S>
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swapped_t operator^(const S& b) const {
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return swap() ^ b;
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}
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swapped_t& operator^=(const swapped_t& b) {
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value = swap(swap() ^ b.swap());
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return *this;
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}
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template <typename S>
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swapped_t& operator^=(const S& b) {
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value = swap(swap() ^ b);
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return *this;
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}
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template <typename S>
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swapped_t operator<<(const S& b) const {
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return swap() << b;
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}
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template <typename S>
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swapped_t& operator<<=(const S& b) const {
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value = swap(swap() << b);
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return *this;
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}
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template <typename S>
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swapped_t operator>>(const S& b) const {
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return swap() >> b;
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}
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template <typename S>
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swapped_t& operator>>=(const S& b) const {
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value = swap(swap() >> b);
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return *this;
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}
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// Member
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/** todo **/
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// Arithmetics
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template <typename S, typename T2, typename F2>
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friend S operator+(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator-(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator/(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator*(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator%(const S& p, const swapped_t v);
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// Arithmetics + assignements
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template <typename S, typename T2, typename F2>
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friend S operator+=(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend S operator-=(const S& p, const swapped_t v);
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// Bitmath
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template <typename S, typename T2, typename F2>
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friend S operator&(const S& p, const swapped_t v);
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// Comparison
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template <typename S, typename T2, typename F2>
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friend bool operator<(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator>(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator<=(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator>=(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator!=(const S& p, const swapped_t v);
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template <typename S, typename T2, typename F2>
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friend bool operator==(const S& p, const swapped_t v);
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};
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// Arithmetics
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template <typename S, typename T, typename F>
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S operator+(const S& i, const swap_struct_t<T, F> v) {
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return i + v.swap();
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}
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template <typename S, typename T, typename F>
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S operator-(const S& i, const swap_struct_t<T, F> v) {
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return i - v.swap();
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}
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template <typename S, typename T, typename F>
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S operator/(const S& i, const swap_struct_t<T, F> v) {
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return i / v.swap();
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}
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template <typename S, typename T, typename F>
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S operator*(const S& i, const swap_struct_t<T, F> v) {
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return i * v.swap();
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}
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template <typename S, typename T, typename F>
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S operator%(const S& i, const swap_struct_t<T, F> v) {
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return i % v.swap();
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}
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// Arithmetics + assignements
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template <typename S, typename T, typename F>
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S& operator+=(S& i, const swap_struct_t<T, F> v) {
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i += v.swap();
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return i;
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}
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template <typename S, typename T, typename F>
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S& operator-=(S& i, const swap_struct_t<T, F> v) {
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i -= v.swap();
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return i;
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}
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// Logical
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template <typename S, typename T, typename F>
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S operator&(const S& i, const swap_struct_t<T, F> v) {
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return i & v.swap();
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}
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template <typename S, typename T, typename F>
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S operator&(const swap_struct_t<T, F> v, const S& i) {
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return static_cast<S>(v.swap() & i);
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}
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// Comparaison
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template <typename S, typename T, typename F>
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bool operator<(const S& p, const swap_struct_t<T, F> v) {
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return p < v.swap();
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}
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template <typename S, typename T, typename F>
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bool operator>(const S& p, const swap_struct_t<T, F> v) {
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return p > v.swap();
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}
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template <typename S, typename T, typename F>
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bool operator<=(const S& p, const swap_struct_t<T, F> v) {
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return p <= v.swap();
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}
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template <typename S, typename T, typename F>
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bool operator>=(const S& p, const swap_struct_t<T, F> v) {
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return p >= v.swap();
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}
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template <typename S, typename T, typename F>
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bool operator!=(const S& p, const swap_struct_t<T, F> v) {
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return p != v.swap();
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|
}
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template <typename S, typename T, typename F>
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bool operator==(const S& p, const swap_struct_t<T, F> v) {
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return p == v.swap();
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|
}
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|
|
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template <typename T>
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|
struct swap_64_t {
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static T swap(T x) {
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return static_cast<T>(Common::swap64(x));
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}
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|
};
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|
|
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template <typename T>
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|
struct swap_32_t {
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|
static T swap(T x) {
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|
return static_cast<T>(Common::swap32(x));
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|
}
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|
};
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|
|
|
template <typename T>
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|
struct swap_16_t {
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|
static T swap(T x) {
|
|
return static_cast<T>(Common::swap16(x));
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|
}
|
|
};
|
|
|
|
template <typename T>
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|
struct swap_float_t {
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|
static T swap(T x) {
|
|
return static_cast<T>(Common::swapf(x));
|
|
}
|
|
};
|
|
|
|
template <typename T>
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|
struct swap_double_t {
|
|
static T swap(T x) {
|
|
return static_cast<T>(Common::swapd(x));
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct swap_enum_t {
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|
static_assert(std::is_enum_v<T>);
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|
using base = std::underlying_type_t<T>;
|
|
|
|
public:
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|
swap_enum_t() = default;
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|
swap_enum_t(const T& v) : value(swap(v)) {}
|
|
|
|
swap_enum_t& operator=(const T& v) {
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|
value = swap(v);
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|
return *this;
|
|
}
|
|
|
|
operator T() const {
|
|
return swap(value);
|
|
}
|
|
|
|
explicit operator base() const {
|
|
return static_cast<base>(swap(value));
|
|
}
|
|
|
|
protected:
|
|
T value{};
|
|
// clang-format off
|
|
using swap_t = std::conditional_t<
|
|
std::is_same_v<base, u16>, swap_16_t<u16>, std::conditional_t<
|
|
std::is_same_v<base, s16>, swap_16_t<s16>, std::conditional_t<
|
|
std::is_same_v<base, u32>, swap_32_t<u32>, std::conditional_t<
|
|
std::is_same_v<base, s32>, swap_32_t<s32>, std::conditional_t<
|
|
std::is_same_v<base, u64>, swap_64_t<u64>, std::conditional_t<
|
|
std::is_same_v<base, s64>, swap_64_t<s64>, void>>>>>>;
|
|
// clang-format on
|
|
static T swap(T x) {
|
|
return static_cast<T>(swap_t::swap(static_cast<base>(x)));
|
|
}
|
|
};
|
|
|
|
struct SwapTag {}; // Use the different endianness from the system
|
|
struct KeepTag {}; // Use the same endianness as the system
|
|
|
|
template <typename T, typename Tag>
|
|
struct AddEndian;
|
|
|
|
// KeepTag specializations
|
|
|
|
template <typename T>
|
|
struct AddEndian<T, KeepTag> {
|
|
using type = T;
|
|
};
|
|
|
|
// SwapTag specializations
|
|
|
|
template <>
|
|
struct AddEndian<u8, SwapTag> {
|
|
using type = u8;
|
|
};
|
|
|
|
template <>
|
|
struct AddEndian<u16, SwapTag> {
|
|
using type = swap_struct_t<u16, swap_16_t<u16>>;
|
|
};
|
|
|
|
template <>
|
|
struct AddEndian<u32, SwapTag> {
|
|
using type = swap_struct_t<u32, swap_32_t<u32>>;
|
|
};
|
|
|
|
template <>
|
|
struct AddEndian<u64, SwapTag> {
|
|
using type = swap_struct_t<u64, swap_64_t<u64>>;
|
|
};
|
|
|
|
template <>
|
|
struct AddEndian<s8, SwapTag> {
|
|
using type = s8;
|
|
};
|
|
|
|
template <>
|
|
struct AddEndian<s16, SwapTag> {
|
|
using type = swap_struct_t<s16, swap_16_t<s16>>;
|
|
};
|
|
|
|
template <>
|
|
struct AddEndian<s32, SwapTag> {
|
|
using type = swap_struct_t<s32, swap_32_t<s32>>;
|
|
};
|
|
|
|
template <>
|
|
struct AddEndian<s64, SwapTag> {
|
|
using type = swap_struct_t<s64, swap_64_t<s64>>;
|
|
};
|
|
|
|
template <>
|
|
struct AddEndian<float, SwapTag> {
|
|
using type = swap_struct_t<float, swap_float_t<float>>;
|
|
};
|
|
|
|
template <>
|
|
struct AddEndian<double, SwapTag> {
|
|
using type = swap_struct_t<double, swap_double_t<double>>;
|
|
};
|
|
|
|
template <typename T>
|
|
struct AddEndian<T, SwapTag> {
|
|
static_assert(std::is_enum_v<T>);
|
|
using type = swap_enum_t<T>;
|
|
};
|
|
|
|
// Alias LETag/BETag as KeepTag/SwapTag depending on the system
|
|
#if COMMON_LITTLE_ENDIAN
|
|
|
|
using LETag = KeepTag;
|
|
using BETag = SwapTag;
|
|
|
|
#else
|
|
|
|
using BETag = KeepTag;
|
|
using LETag = SwapTag;
|
|
|
|
#endif
|
|
|
|
// Aliases for LE types
|
|
using u16_le = AddEndian<u16, LETag>::type;
|
|
using u32_le = AddEndian<u32, LETag>::type;
|
|
using u64_le = AddEndian<u64, LETag>::type;
|
|
|
|
using s16_le = AddEndian<s16, LETag>::type;
|
|
using s32_le = AddEndian<s32, LETag>::type;
|
|
using s64_le = AddEndian<s64, LETag>::type;
|
|
|
|
template <typename T>
|
|
using enum_le = std::enable_if_t<std::is_enum_v<T>, typename AddEndian<T, LETag>::type>;
|
|
|
|
using float_le = AddEndian<float, LETag>::type;
|
|
using double_le = AddEndian<double, LETag>::type;
|
|
|
|
// Aliases for BE types
|
|
using u16_be = AddEndian<u16, BETag>::type;
|
|
using u32_be = AddEndian<u32, BETag>::type;
|
|
using u64_be = AddEndian<u64, BETag>::type;
|
|
|
|
using s16_be = AddEndian<s16, BETag>::type;
|
|
using s32_be = AddEndian<s32, BETag>::type;
|
|
using s64_be = AddEndian<s64, BETag>::type;
|
|
|
|
template <typename T>
|
|
using enum_be = std::enable_if_t<std::is_enum_v<T>, typename AddEndian<T, BETag>::type>;
|
|
|
|
using float_be = AddEndian<float, BETag>::type;
|
|
using double_be = AddEndian<double, BETag>::type;
|