epan/bitswap.c

   1 /* bitswap.c
   2  * Table of bit-swapped values of bytes
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <glib.h>
  29
  30 #include "bitswap.h"
  31
  32 /* "swaptab[i]" is the value of "i" with the bits reversed. */
  33 guint8 swaptab[256] = {
  34   0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
  35   0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
  36   0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
  37   0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
  38   0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
  39   0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
  40   0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
  41   0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
  42   0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
  43   0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
  44   0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
  45   0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
  46   0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
  47   0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
  48   0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
  49   0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
  50   0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
  51   0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
  52   0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
  53   0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
  54   0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
  55   0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
  56   0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
  57   0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
  58   0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
  59   0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
  60   0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
  61   0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
  62   0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
  63   0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
  64   0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
  65   0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
  66 };