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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263//// byteswap.cpp//// Copyright (c) Microsoft Corporation. All rights reserved.//// Defines functions that swap the bytes of an unsigned integer.//#include <stdlib.h>
#pragma function(_byteswap_ulong, _byteswap_uint64, _byteswap_ushort)
/****unsigned long _byteswap_ulong(i) - long byteswap**Purpose:* Performs a byte swap on an unsigned integer.**Entry:* unsigned long i: value to swap**Exit:* returns swaped**Exceptions:* None.********************************************************************************/
extern "C" unsigned long __cdecl _byteswap_ulong(unsigned long const i){ unsigned int j; j = (i << 24); j += (i << 8) & 0x00FF0000; j += (i >> 8) & 0x0000FF00; j += (i >> 24); return j;}
extern "C" unsigned short __cdecl _byteswap_ushort(unsigned short const i){ unsigned short j; j = (i << 8); j += (i >> 8); return j;}
extern "C" unsigned __int64 __cdecl _byteswap_uint64(unsigned __int64 const i){ unsigned __int64 j; j = (i << 56); j += (i << 40) & 0x00FF000000000000; j += (i << 24) & 0x0000FF0000000000; j += (i << 8) & 0x000000FF00000000; j += (i >> 8) & 0x00000000FF000000; j += (i >> 24) & 0x0000000000FF0000; j += (i >> 40) & 0x000000000000FF00; j += (i >> 56); return j;
}