lib-src/hexl.c

   1 /* Convert files for Emacs Hexl mode.
   2    Copyright (C) 1989, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
   3
   4 This file is not considered part of GNU Emacs.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software Foundation,
  18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <stdio.h>
  25 #include <ctype.h>
  26 #ifdef DOS_NT
  27 #include <fcntl.h>
  28 #if __DJGPP__ >= 2
  29 #include <io.h>
  30 #endif
  31 #endif
  32 #ifdef WINDOWSNT
  33 #include <io.h>
  34 #endif
  35
  36 #define DEFAULT_GROUPING        0x01
  37 #define DEFAULT_BASE            16
  38
  39 #undef TRUE
  40 #undef FALSE
  41 #define TRUE  (1)
  42 #define FALSE (0)
  43
  44 int base = DEFAULT_BASE, un_flag = FALSE, iso_flag = FALSE, endian = 1;
  45 int group_by = DEFAULT_GROUPING;
  46 char *progname;
  47
  48 void usage();
  49
  50 int
  51 main (argc, argv)
  52      int argc;
  53      char *argv[];
  54 {
  55   register long address;
  56   char string[18];
  57   FILE *fp;
  58
  59   progname = *argv++; --argc;
  60
  61   /*
  62    ** -hex              hex dump
  63    ** -oct              Octal dump
  64    ** -group-by-8-bits
  65    ** -group-by-16-bits
  66    ** -group-by-32-bits
  67    ** -group-by-64-bits
  68    ** -iso              iso character set.
  69    ** -big-endian       Big Endian
  70    ** -little-endian    Little Endian
  71    ** -un || -de        from hexl format to binary.
  72    ** --                End switch list.
  73    ** <filename>        dump filename
  74    ** -         (as filename == stdin)
  75    */
  76
  77   while (*argv && *argv[0] == '-' && (*argv)[1])
  78     {
  79       /* A switch! */
  80       if (!strcmp (*argv, "--"))
  81         {
  82           --argc; argv++;
  83           break;
  84         }
  85       else if (!strcmp (*argv, "-un") || !strcmp (*argv, "-de"))
  86         {
  87           un_flag = TRUE;
  88           --argc; argv++;
  89         }
  90       else if (!strcmp (*argv, "-hex"))
  91         {
  92           base = 16;
  93           --argc; argv++;
  94         }
  95       else if (!strcmp (*argv, "-iso"))
  96         {
  97           iso_flag = TRUE;
  98           --argc; argv++;
  99         }
 100       else if (!strcmp (*argv, "-oct"))
 101         {
 102           base = 8;
 103           --argc; argv++;
 104         }
 105       else if (!strcmp (*argv, "-big-endian"))
 106         {
 107           endian = 1;
 108           --argc; argv++;
 109         }
 110       else if (!strcmp (*argv, "-little-endian"))
 111         {
 112           endian = 0;
 113           --argc; argv++;
 114         }
 115       else if (!strcmp (*argv, "-group-by-8-bits"))
 116         {
 117           group_by = 0x00;
 118           --argc; argv++;
 119         }
 120       else if (!strcmp (*argv, "-group-by-16-bits"))
 121         {
 122           group_by = 0x01;
 123           --argc; argv++;
 124         }
 125       else if (!strcmp (*argv, "-group-by-32-bits"))
 126         {
 127           group_by = 0x03;
 128           --argc; argv++;
 129         }
 130       else if (!strcmp (*argv, "-group-by-64-bits"))
 131         {
 132           group_by = 0x07;
 133           endian = 0;
 134           --argc; argv++;
 135         }
 136       else
 137         {
 138           fprintf (stderr, "%s: invalid switch: \"%s\".\n", progname,
 139                    *argv);
 140           usage ();
 141         }
 142     }
 143
 144   do
 145     {
 146       if (*argv == NULL)
 147         fp = stdin;
 148       else
 149         {
 150           char *filename = *argv++;
 151
 152           if (!strcmp (filename, "-"))
 153             fp = stdin;
 154           else if ((fp = fopen (filename, "r")) == NULL)
 155             {
 156               perror (filename);
 157               continue;
 158             }
 159         }
 160
 161       if (un_flag)
 162         {
 163           char buf[18];
 164
 165 #ifdef DOS_NT
 166 #if (__DJGPP__ >= 2) || (defined WINDOWSNT)
 167           if (!isatty (fileno (stdout)))
 168             setmode (fileno (stdout), O_BINARY);
 169 #else
 170           (stdout)->_flag &= ~_IOTEXT; /* print binary */
 171           _setmode (fileno (stdout), O_BINARY);
 172 #endif
 173 #endif
 174           for (;;)
 175             {
 176               register int i, c = 0, d;
 177
 178 #define hexchar(x) (isdigit (x) ? x - '0' : x - 'a' + 10)
 179
 180               fread (buf, 1, 10, fp); /* skip 10 bytes */
 181
 182               for (i=0; i < 16; ++i)
 183                 {
 184                   if ((c = getc (fp)) == ' ' || c == EOF)
 185                     break;
 186
 187                   d = getc (fp);
 188                   c = hexchar (c) * 0x10 + hexchar (d);
 189                   putchar (c);
 190
 191                   if ((i&group_by) == group_by)
 192                     getc (fp);
 193                 }
 194
 195               if (c == ' ')
 196                 {
 197                   while ((c = getc (fp)) != '\n' && c != EOF)
 198                     ;
 199
 200                   if (c == EOF)
 201                     break;
 202                 }
 203               else
 204                 {
 205                   if (i < 16)
 206                     break;
 207
 208                   fread (buf, 1, 18, fp); /* skip 18 bytes */
 209                 }
 210             }
 211         }
 212       else
 213         {
 214 #ifdef DOS_NT
 215 #if (__DJGPP__ >= 2) || (defined WINDOWSNT)
 216           if (!isatty (fileno (fp)))
 217             setmode (fileno (fp), O_BINARY);
 218 #else
 219           (fp)->_flag &= ~_IOTEXT; /* read binary */
 220           _setmode (fileno (fp), O_BINARY);
 221 #endif
 222 #endif
 223           address = 0;
 224           string[0] = ' ';
 225           string[17] = '\0';
 226           for (;;)
 227             {
 228               register int i, c = 0;
 229
 230               for (i=0; i < 16; ++i)
 231                 {
 232                   if ((c = getc (fp)) == EOF)
 233                     {
 234                       if (!i)
 235                         break;
 236
 237                       fputs ("  ", stdout);
 238                       string[i+1] = '\0';
 239                     }
 240                   else
 241                     {
 242                       if (!i)
 243                         printf ("%08lx: ", address);
 244
 245                       if (iso_flag)
 246                         string[i+1] =
 247                           (c < 0x20 || (c >= 0x7F && c < 0xa0)) ? '.' :c;
 248                       else
 249                         string[i+1] = (c < 0x20 || c >= 0x7F) ? '.' : c;
 250
 251                       printf ("%02x", c);
 252                     }
 253
 254                   if ((i&group_by) == group_by)
 255                     putchar (' ');
 256                 }
 257
 258               if (i)
 259                 puts (string);
 260
 261               if (c == EOF)
 262                 break;
 263
 264               address += 0x10;
 265
 266             }
 267         }
 268
 269       if (fp != stdin)
 270         fclose (fp);
 271
 272     } while (*argv != NULL);
 273   return EXIT_SUCCESS;
 274 }
 275
 276 void
 277 usage ()
 278 {
 279   fprintf (stderr, "usage: %s [-de] [-iso]\n", progname);
 280   exit (EXIT_FAILURE);
 281 }
 282
 283 /* arch-tag: 20e04fb7-926e-4e48-be86-64fe869ecdaa
 284    (do not change this comment) */
 285
 286 /* hexl.c ends here */