mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2024-11-15 05:47:56 -07:00
4ae48e10e5
There is code below that assumes the presence of those macros (by #undef'ing them), but none of the included headers provided them. This fixes a build failure on OpenBSD where the undef'd macros _do_ get picked up later on in a compilation unit (through which include, I don't know), and thus shadow the Common::swap* functions.
170 lines
2.8 KiB
C++
170 lines
2.8 KiB
C++
// Copyright 2017 Dolphin Emulator Project
|
|
// Licensed under GPLv2+
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <cstring>
|
|
#include <type_traits>
|
|
|
|
#ifdef __APPLE__
|
|
#include <libkern/OSByteOrder.h>
|
|
#elif defined(__linux__)
|
|
#include <byteswap.h>
|
|
#elif defined(__FreeBSD__)
|
|
#include <sys/endian.h>
|
|
#elif defined(__OpenBSD__)
|
|
#include <endian.h>
|
|
#endif
|
|
|
|
#include "Common/CommonTypes.h"
|
|
|
|
namespace Common
|
|
{
|
|
inline u8 swap8(u8 data)
|
|
{
|
|
return data;
|
|
}
|
|
inline u32 swap24(const u8* data)
|
|
{
|
|
return (data[0] << 16) | (data[1] << 8) | data[2];
|
|
}
|
|
|
|
#if defined(ANDROID) || defined(__OpenBSD__)
|
|
#undef swap16
|
|
#undef swap32
|
|
#undef swap64
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
inline u16 swap16(u16 data)
|
|
{
|
|
return _byteswap_ushort(data);
|
|
}
|
|
inline u32 swap32(u32 data)
|
|
{
|
|
return _byteswap_ulong(data);
|
|
}
|
|
inline u64 swap64(u64 data)
|
|
{
|
|
return _byteswap_uint64(data);
|
|
}
|
|
#elif __linux__
|
|
inline u16 swap16(u16 data)
|
|
{
|
|
return bswap_16(data);
|
|
}
|
|
inline u32 swap32(u32 data)
|
|
{
|
|
return bswap_32(data);
|
|
}
|
|
inline u64 swap64(u64 data)
|
|
{
|
|
return bswap_64(data);
|
|
}
|
|
#elif __APPLE__
|
|
inline __attribute__((always_inline)) u16 swap16(u16 data)
|
|
{
|
|
return OSSwapInt16(data);
|
|
}
|
|
inline __attribute__((always_inline)) u32 swap32(u32 data)
|
|
{
|
|
return OSSwapInt32(data);
|
|
}
|
|
inline __attribute__((always_inline)) u64 swap64(u64 data)
|
|
{
|
|
return OSSwapInt64(data);
|
|
}
|
|
#elif __FreeBSD__
|
|
inline u16 swap16(u16 data)
|
|
{
|
|
return bswap16(data);
|
|
}
|
|
inline u32 swap32(u32 data)
|
|
{
|
|
return bswap32(data);
|
|
}
|
|
inline u64 swap64(u64 data)
|
|
{
|
|
return bswap64(data);
|
|
}
|
|
#else
|
|
// Slow generic implementation.
|
|
inline u16 swap16(u16 data)
|
|
{
|
|
return (data >> 8) | (data << 8);
|
|
}
|
|
inline u32 swap32(u32 data)
|
|
{
|
|
return (swap16(data) << 16) | swap16(data >> 16);
|
|
}
|
|
inline u64 swap64(u64 data)
|
|
{
|
|
return ((u64)swap32(data) << 32) | swap32(data >> 32);
|
|
}
|
|
#endif
|
|
|
|
inline u16 swap16(const u8* data)
|
|
{
|
|
u16 value;
|
|
std::memcpy(&value, data, sizeof(u16));
|
|
|
|
return swap16(value);
|
|
}
|
|
inline u32 swap32(const u8* data)
|
|
{
|
|
u32 value;
|
|
std::memcpy(&value, data, sizeof(u32));
|
|
|
|
return swap32(value);
|
|
}
|
|
inline u64 swap64(const u8* data)
|
|
{
|
|
u64 value;
|
|
std::memcpy(&value, data, sizeof(u64));
|
|
|
|
return swap64(value);
|
|
}
|
|
|
|
template <int count>
|
|
void swap(u8*);
|
|
|
|
template <>
|
|
inline void swap<1>(u8* data)
|
|
{
|
|
}
|
|
|
|
template <>
|
|
inline void swap<2>(u8* data)
|
|
{
|
|
const u16 value = swap16(data);
|
|
|
|
std::memcpy(data, &value, sizeof(u16));
|
|
}
|
|
|
|
template <>
|
|
inline void swap<4>(u8* data)
|
|
{
|
|
const u32 value = swap32(data);
|
|
|
|
std::memcpy(data, &value, sizeof(u32));
|
|
}
|
|
|
|
template <>
|
|
inline void swap<8>(u8* data)
|
|
{
|
|
const u64 value = swap64(data);
|
|
|
|
std::memcpy(data, &value, sizeof(u64));
|
|
}
|
|
|
|
template <typename T>
|
|
inline T FromBigEndian(T data)
|
|
{
|
|
static_assert(std::is_arithmetic<T>::value, "function only makes sense with arithmetic types");
|
|
|
|
swap<sizeof(data)>(reinterpret_cast<u8*>(&data));
|
|
return data;
|
|
}
|
|
} // Namespace Common
|