зеркало из https://github.com/microsoft/lsvmtools.git
126 строки
3.3 KiB
C
126 строки
3.3 KiB
C
/*
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**==============================================================================
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**
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** LSVMTools
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**
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** MIT License
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**
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** Copyright (c) Microsoft Corporation. All rights reserved.
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**
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** Permission is hereby granted, free of charge, to any person obtaining a copy
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** of this software and associated documentation files (the "Software"), to deal
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** in the Software without restriction, including without limitation the rights
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** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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** copies of the Software, and to permit persons to whom the Software is
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** furnished to do so, subject to the following conditions:
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**
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** The above copyright notice and this permission notice shall be included in
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** all copies or substantial portions of the Software.
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**
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** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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** SOFTWARE
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**
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**==============================================================================
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*/
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#ifndef _byteorder_h
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#define _byteorder_h
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#include "config.h"
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#include "eficommon.h"
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#include "inline.h"
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/*
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**==============================================================================
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**
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** IS_BIG_ENDIAN
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**
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**==============================================================================
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*/
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INLINE BOOLEAN __IsBigEndian()
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{
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typedef union _U
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{
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unsigned short x;
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unsigned char bytes[2];
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}
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U;
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static U u = { 0xABCD };
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return u.bytes[0] == 0xAB ? TRUE : FALSE;
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}
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#if defined(__i386) || defined(__x86_64)
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# define IS_BIG_ENDIAN FALSE
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#endif
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#if !defined(IS_BIG_ENDIAN)
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# define IS_BIG_ENDIAN __IsBigEndian()
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#endif
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/*
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**==============================================================================
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**
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** ByteSwapU16()
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** ByteSwapU32()
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** ByteSwapU64()
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**
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**==============================================================================
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*/
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INLINE UINT64 ByteSwapU64(UINT64 x)
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{
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if (IS_BIG_ENDIAN)
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{
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return x;
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}
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else
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{
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return
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((UINT64)((x & 0xFF) << 56)) |
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((UINT64)((x & 0xFF00) << 40)) |
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((UINT64)((x & 0xFF0000) << 24)) |
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((UINT64)((x & 0xFF000000) << 8)) |
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((UINT64)((x & 0xFF00000000) >> 8)) |
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((UINT64)((x & 0xFF0000000000) >> 24)) |
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((UINT64)((x & 0xFF000000000000) >> 40)) |
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((UINT64)((x & 0xFF00000000000000) >> 56));
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}
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}
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INLINE UINT32 ByteSwapU32(UINT32 x)
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{
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if (IS_BIG_ENDIAN)
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{
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return x;
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}
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else
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{
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return
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((UINT32)((x & 0x000000FF) << 24)) |
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((UINT32)((x & 0x0000FF00) << 8)) |
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((UINT32)((x & 0x00FF0000) >> 8)) |
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((UINT32)((x & 0xFF000000) >> 24));
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}
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}
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INLINE UINT16 ByteSwapU16(UINT16 x)
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{
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if (IS_BIG_ENDIAN)
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{
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return x;
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}
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else
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{
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return
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((UINT16)((x & 0x00FF) << 8)) |
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((UINT16)((x & 0xFF00) >> 8));
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}
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}
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#endif /* _byteorder_h */
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