lib-src/hexl.c

   1 /* Convert files for Emacs Hexl mode.
   2    Copyright (C) 1989, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
   3                  2009, 2010, 2011  Free Software Foundation, Inc.
   4
   5 Author: Keith Gabryelski
   6 (according to authors.el)
   7
   8 This file is not considered part of GNU Emacs.
   9
  10 This program is free software: you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation, either version 3 of the License, or
  13 (at your option) any later version.
  14
  15 This program is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <ctype.h>
  30 #ifdef DOS_NT
  31 #include <fcntl.h>
  32 #if __DJGPP__ >= 2
  33 #include <io.h>
  34 #endif
  35 #endif
  36 #ifdef WINDOWSNT
  37 #include <io.h>
  38 #endif
  39
  40 #define DEFAULT_GROUPING        0x01
  41 #define DEFAULT_BASE            16
  42
  43 #undef TRUE
  44 #undef FALSE
  45 #define TRUE  (1)
  46 #define FALSE (0)
  47
  48 int base = DEFAULT_BASE, un_flag = FALSE, iso_flag = FALSE, endian = 1;
  49 int group_by = DEFAULT_GROUPING;
  50 char *progname;
  51
  52 void usage();
  53
  54 int
  55 main (argc, argv)
  56      int argc;
  57      char *argv[];
  58 {
  59   register long address;
  60   char string[18];
  61   FILE *fp;
  62
  63   progname = *argv++; --argc;
  64
  65   /*
  66    ** -hex              hex dump
  67    ** -oct              Octal dump
  68    ** -group-by-8-bits
  69    ** -group-by-16-bits
  70    ** -group-by-32-bits
  71    ** -group-by-64-bits
  72    ** -iso              iso character set.
  73    ** -big-endian       Big Endian
  74    ** -little-endian    Little Endian
  75    ** -un || -de        from hexl format to binary.
  76    ** --                End switch list.
  77    ** <filename>        dump filename
  78    ** -         (as filename == stdin)
  79    */
  80
  81   while (*argv && *argv[0] == '-' && (*argv)[1])
  82     {
  83       /* A switch! */
  84       if (!strcmp (*argv, "--"))
  85         {
  86           --argc; argv++;
  87           break;
  88         }
  89       else if (!strcmp (*argv, "-un") || !strcmp (*argv, "-de"))
  90         {
  91           un_flag = TRUE;
  92           --argc; argv++;
  93         }
  94       else if (!strcmp (*argv, "-hex"))
  95         {
  96           base = 16;
  97           --argc; argv++;
  98         }
  99       else if (!strcmp (*argv, "-iso"))
 100         {
 101           iso_flag = TRUE;
 102           --argc; argv++;
 103         }
 104       else if (!strcmp (*argv, "-oct"))
 105         {
 106           base = 8;
 107           --argc; argv++;
 108         }
 109       else if (!strcmp (*argv, "-big-endian"))
 110         {
 111           endian = 1;
 112           --argc; argv++;
 113         }
 114       else if (!strcmp (*argv, "-little-endian"))
 115         {
 116           endian = 0;
 117           --argc; argv++;
 118         }
 119       else if (!strcmp (*argv, "-group-by-8-bits"))
 120         {
 121           group_by = 0x00;
 122           --argc; argv++;
 123         }
 124       else if (!strcmp (*argv, "-group-by-16-bits"))
 125         {
 126           group_by = 0x01;
 127           --argc; argv++;
 128         }
 129       else if (!strcmp (*argv, "-group-by-32-bits"))
 130         {
 131           group_by = 0x03;
 132           --argc; argv++;
 133         }
 134       else if (!strcmp (*argv, "-group-by-64-bits"))
 135         {
 136           group_by = 0x07;
 137           endian = 0;
 138           --argc; argv++;
 139         }
 140       else
 141         {
 142           fprintf (stderr, "%s: invalid switch: \"%s\".\n", progname,
 143                    *argv);
 144           usage ();
 145         }
 146     }
 147
 148   do
 149     {
 150       if (*argv == NULL)
 151         fp = stdin;
 152       else
 153         {
 154           char *filename = *argv++;
 155
 156           if (!strcmp (filename, "-"))
 157             fp = stdin;
 158           else if ((fp = fopen (filename, "r")) == NULL)
 159             {
 160               perror (filename);
 161               continue;
 162             }
 163         }
 164
 165       if (un_flag)
 166         {
 167           char buf[18];
 168
 169 #ifdef DOS_NT
 170 #if (__DJGPP__ >= 2) || (defined WINDOWSNT)
 171           if (!isatty (fileno (stdout)))
 172             setmode (fileno (stdout), O_BINARY);
 173 #else
 174           (stdout)->_flag &= ~_IOTEXT; /* print binary */
 175           _setmode (fileno (stdout), O_BINARY);
 176 #endif
 177 #endif
 178           for (;;)
 179             {
 180               register int i, c = 0, d;
 181
 182 #define hexchar(x) (isdigit (x) ? x - '0' : x - 'a' + 10)
 183
 184               fread (buf, 1, 10, fp); /* skip 10 bytes */
 185
 186               for (i=0; i < 16; ++i)
 187                 {
 188                   if ((c = getc (fp)) == ' ' || c == EOF)
 189                     break;
 190
 191                   d = getc (fp);
 192                   c = hexchar (c) * 0x10 + hexchar (d);
 193                   putchar (c);
 194
 195                   if ((i&group_by) == group_by)
 196                     getc (fp);
 197                 }
 198
 199               if (c == ' ')
 200                 {
 201                   while ((c = getc (fp)) != '\n' && c != EOF)
 202                     ;
 203
 204                   if (c == EOF)
 205                     break;
 206                 }
 207               else
 208                 {
 209                   if (i < 16)
 210                     break;
 211
 212                   fread (buf, 1, 18, fp); /* skip 18 bytes */
 213                 }
 214             }
 215         }
 216       else
 217         {
 218 #ifdef DOS_NT
 219 #if (__DJGPP__ >= 2) || (defined WINDOWSNT)
 220           if (!isatty (fileno (fp)))
 221             setmode (fileno (fp), O_BINARY);
 222 #else
 223           (fp)->_flag &= ~_IOTEXT; /* read binary */
 224           _setmode (fileno (fp), O_BINARY);
 225 #endif
 226 #endif
 227           address = 0;
 228           string[0] = ' ';
 229           string[17] = '\0';
 230           for (;;)
 231             {
 232               register int i, c = 0;
 233
 234               for (i=0; i < 16; ++i)
 235                 {
 236                   if ((c = getc (fp)) == EOF)
 237                     {
 238                       if (!i)
 239                         break;
 240
 241                       fputs ("  ", stdout);
 242                       string[i+1] = '\0';
 243                     }
 244                   else
 245                     {
 246                       if (!i)
 247                         printf ("%08lx: ", address);
 248
 249                       if (iso_flag)
 250                         string[i+1] =
 251                           (c < 0x20 || (c >= 0x7F && c < 0xa0)) ? '.' :c;
 252                       else
 253                         string[i+1] = (c < 0x20 || c >= 0x7F) ? '.' : c;
 254
 255                       printf ("%02x", c);
 256                     }
 257
 258                   if ((i&group_by) == group_by)
 259                     putchar (' ');
 260                 }
 261
 262               if (i)
 263                 puts (string);
 264
 265               if (c == EOF)
 266                 break;
 267
 268               address += 0x10;
 269
 270             }
 271         }
 272
 273       if (fp != stdin)
 274         fclose (fp);
 275
 276     } while (*argv != NULL);
 277   return EXIT_SUCCESS;
 278 }
 279
 280 void
 281 usage ()
 282 {
 283   fprintf (stderr, "usage: %s [-de] [-iso]\n", progname);
 284   exit (EXIT_FAILURE);
 285 }
 286
 287 /* arch-tag: 20e04fb7-926e-4e48-be86-64fe869ecdaa
 288    (do not change this comment) */
 289
 290 /* hexl.c ends here */