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