www.pudn.com > truecrypt-4.2-source-code.zip > Endian.c

/* Legal Notice: The source code contained in this file has been derived from 
   the source code of Encryption for the Masses 2.02a, which is Copyright (c) 
   1998-99 Paul Le Roux and which is covered by the 'License Agreement for 
   Encryption for the Masses'. Modifications and additions to that source code 
   contained in this file are Copyright (c) 2004-2006 TrueCrypt Foundation and 
   Copyright (c) 2004 TrueCrypt Team, and are covered by TrueCrypt License 2.0 
   the full text of which is contained in the file License.txt included in 
   TrueCrypt binary and source code distribution archives.  */ 
 
#include "Tcdefs.h" 
#include "Endian.h" 
 
 
unsigned __int32 MirrorBytes32 (unsigned __int32 x) 
{ 
	unsigned __int32 n = (unsigned __int8) x; 
	n <<= 8; n |= (unsigned __int8) (x >> 8); 
	n <<= 8; n |= (unsigned __int8) (x >> 16); 
	return (n << 8) | (unsigned __int8) (x >> 24); 
} 
 
 
unsigned __int64 MirrorBytes64 (unsigned __int64 x) 
{ 
	unsigned __int64 n = (unsigned __int8) x; 
	n <<= 8; n |= (unsigned __int8) (x >> 8); 
	n <<= 8; n |= (unsigned __int8) (x >> 16); 
	n <<= 8; n |= (unsigned __int8) (x >> 24); 
	n <<= 8; n |= (unsigned __int8) (x >> 32); 
	n <<= 8; n |= (unsigned __int8) (x >> 40); 
	n <<= 8; n |= (unsigned __int8) (x >> 48); 
	return (n << 8) | (unsigned __int8) (x >> 56); 
} 
 
 
void 
LongReverse (unsigned __int32 *buffer, unsigned byteCount) 
{ 
	unsigned __int32 value; 
 
	byteCount /= sizeof (unsigned __int32); 
	while (byteCount--) 
	{ 
		value = *buffer; 
		value = ((value & 0xFF00FF00L) >> 8) | \ 
		    ((value & 0x00FF00FFL) << 8); 
		*buffer++ = (value << 16) | (value >> 16); 
	} 
}