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Annotation of truecrypt/common/endian.c, revision 1.1.1.14

1.1.1.9   root        1: /*
1.1.1.11  root        2:  Legal Notice: Some portions of the source code contained in this file were
                      3:  derived from the source code of Encryption for the Masses 2.02a, which is
                      4:  Copyright (c) 1998-2000 Paul Le Roux and which is governed by the 'License
                      5:  Agreement for Encryption for the Masses'. Modifications and additions to
                      6:  the original source code (contained in this file) and all other portions of
1.1.1.14! root        7:  this file are Copyright (c) 2003-2009 TrueCrypt Foundation and are governed
1.1.1.13  root        8:  by the TrueCrypt License 2.6 the full text of which is contained in the
1.1.1.11  root        9:  file License.txt included in TrueCrypt binary and source code distribution
1.1.1.9   root       10:  packages. */
1.1.1.6   root       11: 
                     12: #include "Tcdefs.h"
1.1.1.9   root       13: #include "Common/Endian.h"
                     14: 
                     15: 
                     16: unsigned __int16 MirrorBytes16 (unsigned __int16 x)
                     17: {
                     18:        return (x << 8) | (x >> 8);
                     19: }
1.1.1.6   root       20: 
                     21: 
                     22: unsigned __int32 MirrorBytes32 (unsigned __int32 x)
                     23: {
                     24:        unsigned __int32 n = (unsigned __int8) x;
                     25:        n <<= 8; n |= (unsigned __int8) (x >> 8);
                     26:        n <<= 8; n |= (unsigned __int8) (x >> 16);
                     27:        return (n << 8) | (unsigned __int8) (x >> 24);
                     28: }
                     29: 
1.1.1.11  root       30: #ifndef TC_NO_COMPILER_INT64
1.1.1.14! root       31: uint64 MirrorBytes64 (uint64 x)
1.1.1.6   root       32: {
1.1.1.14! root       33:        uint64 n = (unsigned __int8) x;
1.1.1.6   root       34:        n <<= 8; n |= (unsigned __int8) (x >> 8);
                     35:        n <<= 8; n |= (unsigned __int8) (x >> 16);
                     36:        n <<= 8; n |= (unsigned __int8) (x >> 24);
                     37:        n <<= 8; n |= (unsigned __int8) (x >> 32);
                     38:        n <<= 8; n |= (unsigned __int8) (x >> 40);
                     39:        n <<= 8; n |= (unsigned __int8) (x >> 48);
                     40:        return (n << 8) | (unsigned __int8) (x >> 56);
                     41: }
1.1.1.11  root       42: #endif
1.1       root       43: 
                     44: void
1.1.1.6   root       45: LongReverse (unsigned __int32 *buffer, unsigned byteCount)
1.1       root       46: {
1.1.1.6   root       47:        unsigned __int32 value;
1.1       root       48: 
1.1.1.6   root       49:        byteCount /= sizeof (unsigned __int32);
1.1       root       50:        while (byteCount--)
                     51:        {
                     52:                value = *buffer;
                     53:                value = ((value & 0xFF00FF00L) >> 8) | \
                     54:                    ((value & 0x00FF00FFL) << 8);
                     55:                *buffer++ = (value << 16) | (value >> 16);
                     56:        }
                     57: }

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