forked from dolphin-emu/dolphin
177 lines
4.3 KiB
C++
177 lines
4.3 KiB
C++
// Copyright 2009 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#ifdef __APPLE__
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#include <libkern/OSByteOrder.h>
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#endif
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#include <cstddef>
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#include <string>
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#include "Common/CommonTypes.h"
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// Will fail to compile on a non-array:
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template <typename T, size_t N>
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constexpr size_t ArraySize(T (&arr)[N])
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{
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return N;
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}
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#define b2(x) ( (x) | ( (x) >> 1) )
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#define b4(x) ( b2(x) | ( b2(x) >> 2) )
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#define b8(x) ( b4(x) | ( b4(x) >> 4) )
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#define b16(x) ( b8(x) | ( b8(x) >> 8) )
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#define b32(x) (b16(x) | (b16(x) >>16) )
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#define ROUND_UP_POW2(x) (b32(x - 1) + 1)
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#ifndef _WIN32
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#include <errno.h>
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#ifdef __linux__
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#include <byteswap.h>
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#elif defined __FreeBSD__
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#include <sys/endian.h>
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#endif
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// go to debugger mode
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#define Crash() { __builtin_trap(); }
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// GCC 4.8 defines all the rotate functions now
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// Small issue with GCC's lrotl/lrotr intrinsics is they are still 32bit while we require 64bit
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#ifndef _rotl
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inline u32 _rotl(u32 x, int shift)
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{
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shift &= 31;
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if (!shift) return x;
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return (x << shift) | (x >> (32 - shift));
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}
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inline u32 _rotr(u32 x, int shift)
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{
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shift &= 31;
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if (!shift) return x;
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return (x >> shift) | (x << (32 - shift));
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}
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#endif
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inline u64 _rotl64(u64 x, unsigned int shift)
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{
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unsigned int n = shift % 64;
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return (x << n) | (x >> (64 - n));
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}
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inline u64 _rotr64(u64 x, unsigned int shift)
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{
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unsigned int n = shift % 64;
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return (x >> n) | (x << (64 - n));
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}
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#else // WIN32
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// Function Cross-Compatibility
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#define strcasecmp _stricmp
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#define strncasecmp _strnicmp
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#define unlink _unlink
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#define vscprintf _vscprintf
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// 64 bit offsets for Windows
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#define fseeko _fseeki64
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#define ftello _ftelli64
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#define atoll _atoi64
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#define stat64 _stat64
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#define fstat64 _fstat64
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#define fileno _fileno
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extern "C"
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{
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__declspec(dllimport) void __stdcall DebugBreak(void);
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}
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#define Crash() {DebugBreak();}
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#endif // WIN32 ndef
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// Generic function to get last error message.
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// Call directly after the command or use the error num.
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// This function might change the error code.
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// Defined in Misc.cpp.
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std::string GetLastErrorMsg();
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namespace Common
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{
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inline u8 swap8(u8 _data) {return _data;}
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inline u32 swap24(const u8* _data) {return (_data[0] << 16) | (_data[1] << 8) | _data[2];}
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#ifdef ANDROID
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#undef swap16
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#undef swap32
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#undef swap64
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#endif
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#ifdef _WIN32
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inline u16 swap16(u16 _data) {return _byteswap_ushort(_data);}
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inline u32 swap32(u32 _data) {return _byteswap_ulong (_data);}
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inline u64 swap64(u64 _data) {return _byteswap_uint64(_data);}
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#elif __linux__ && !(ANDROID && _M_ARM_64)
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// Android NDK r10c has broken builtin byte swap routines
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// Disabled for now.
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inline u16 swap16(u16 _data) {return bswap_16(_data);}
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inline u32 swap32(u32 _data) {return bswap_32(_data);}
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inline u64 swap64(u64 _data) {return bswap_64(_data);}
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#elif __APPLE__
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inline __attribute__((always_inline)) u16 swap16(u16 _data)
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{return OSSwapInt16(_data);}
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inline __attribute__((always_inline)) u32 swap32(u32 _data)
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{return OSSwapInt32(_data);}
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inline __attribute__((always_inline)) u64 swap64(u64 _data)
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{return OSSwapInt64(_data);}
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#elif __FreeBSD__
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inline u16 swap16(u16 _data) {return bswap16(_data);}
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inline u32 swap32(u32 _data) {return bswap32(_data);}
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inline u64 swap64(u64 _data) {return bswap64(_data);}
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#else
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// Slow generic implementation.
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inline u16 swap16(u16 data) {return (data >> 8) | (data << 8);}
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inline u32 swap32(u32 data) {return (swap16(data) << 16) | swap16(data >> 16);}
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inline u64 swap64(u64 data) {return ((u64)swap32(data) << 32) | swap32(data >> 32);}
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#endif
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inline u16 swap16(const u8* _pData) {return swap16(*(const u16*)_pData);}
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inline u32 swap32(const u8* _pData) {return swap32(*(const u32*)_pData);}
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inline u64 swap64(const u8* _pData) {return swap64(*(const u64*)_pData);}
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template <int count>
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void swap(u8*);
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template <>
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inline void swap<1>(u8* data)
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{}
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template <>
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inline void swap<2>(u8* data)
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{
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*reinterpret_cast<u16*>(data) = swap16(data);
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}
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template <>
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inline void swap<4>(u8* data)
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{
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*reinterpret_cast<u32*>(data) = swap32(data);
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}
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template <>
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inline void swap<8>(u8* data)
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{
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*reinterpret_cast<u64*>(data) = swap64(data);
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}
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template <typename T>
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inline T FromBigEndian(T data)
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{
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static_assert(std::is_arithmetic<T>::value, "function only makes sense with arithmetic types");
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swap<sizeof(data)>(reinterpret_cast<u8*>(&data));
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return data;
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}
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} // Namespace Common
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