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mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-05 08:53:45 +00:00
emacs/lib-src/hexl.c
2006-02-06 11:28:28 +00:00

288 lines
5.3 KiB
C

/* Convert files for Emacs Hexl mode.
Copyright (C) 1989, 2002, 2003, 2004, 2005,
2006 Free Software Foundation, Inc.
This file is not considered part of GNU Emacs.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <ctype.h>
#ifdef DOS_NT
#include <fcntl.h>
#if __DJGPP__ >= 2
#include <io.h>
#endif
#endif
#ifdef WINDOWSNT
#include <io.h>
#endif
#define DEFAULT_GROUPING 0x01
#define DEFAULT_BASE 16
#undef TRUE
#undef FALSE
#define TRUE (1)
#define FALSE (0)
int base = DEFAULT_BASE, un_flag = FALSE, iso_flag = FALSE, endian = 1;
int group_by = DEFAULT_GROUPING;
char *progname;
void usage();
int
main (argc, argv)
int argc;
char *argv[];
{
register long address;
char string[18];
FILE *fp;
progname = *argv++; --argc;
/*
** -hex hex dump
** -oct Octal dump
** -group-by-8-bits
** -group-by-16-bits
** -group-by-32-bits
** -group-by-64-bits
** -iso iso character set.
** -big-endian Big Endian
** -little-endian Little Endian
** -un || -de from hexl format to binary.
** -- End switch list.
** <filename> dump filename
** - (as filename == stdin)
*/
while (*argv && *argv[0] == '-' && (*argv)[1])
{
/* A switch! */
if (!strcmp (*argv, "--"))
{
--argc; argv++;
break;
}
else if (!strcmp (*argv, "-un") || !strcmp (*argv, "-de"))
{
un_flag = TRUE;
--argc; argv++;
}
else if (!strcmp (*argv, "-hex"))
{
base = 16;
--argc; argv++;
}
else if (!strcmp (*argv, "-iso"))
{
iso_flag = TRUE;
--argc; argv++;
}
else if (!strcmp (*argv, "-oct"))
{
base = 8;
--argc; argv++;
}
else if (!strcmp (*argv, "-big-endian"))
{
endian = 1;
--argc; argv++;
}
else if (!strcmp (*argv, "-little-endian"))
{
endian = 0;
--argc; argv++;
}
else if (!strcmp (*argv, "-group-by-8-bits"))
{
group_by = 0x00;
--argc; argv++;
}
else if (!strcmp (*argv, "-group-by-16-bits"))
{
group_by = 0x01;
--argc; argv++;
}
else if (!strcmp (*argv, "-group-by-32-bits"))
{
group_by = 0x03;
--argc; argv++;
}
else if (!strcmp (*argv, "-group-by-64-bits"))
{
group_by = 0x07;
endian = 0;
--argc; argv++;
}
else
{
fprintf (stderr, "%s: invalid switch: \"%s\".\n", progname,
*argv);
usage ();
}
}
do
{
if (*argv == NULL)
fp = stdin;
else
{
char *filename = *argv++;
if (!strcmp (filename, "-"))
fp = stdin;
else if ((fp = fopen (filename, "r")) == NULL)
{
perror (filename);
continue;
}
}
if (un_flag)
{
char buf[18];
#ifdef DOS_NT
#if (__DJGPP__ >= 2) || (defined WINDOWSNT)
if (!isatty (fileno (stdout)))
setmode (fileno (stdout), O_BINARY);
#else
(stdout)->_flag &= ~_IOTEXT; /* print binary */
_setmode (fileno (stdout), O_BINARY);
#endif
#endif
for (;;)
{
register int i, c = 0, d;
#define hexchar(x) (isdigit (x) ? x - '0' : x - 'a' + 10)
fread (buf, 1, 10, fp); /* skip 10 bytes */
for (i=0; i < 16; ++i)
{
if ((c = getc (fp)) == ' ' || c == EOF)
break;
d = getc (fp);
c = hexchar (c) * 0x10 + hexchar (d);
putchar (c);
if ((i&group_by) == group_by)
getc (fp);
}
if (c == ' ')
{
while ((c = getc (fp)) != '\n' && c != EOF)
;
if (c == EOF)
break;
}
else
{
if (i < 16)
break;
fread (buf, 1, 18, fp); /* skip 18 bytes */
}
}
}
else
{
#ifdef DOS_NT
#if (__DJGPP__ >= 2) || (defined WINDOWSNT)
if (!isatty (fileno (fp)))
setmode (fileno (fp), O_BINARY);
#else
(fp)->_flag &= ~_IOTEXT; /* read binary */
_setmode (fileno (fp), O_BINARY);
#endif
#endif
address = 0;
string[0] = ' ';
string[17] = '\0';
for (;;)
{
register int i, c = 0;
for (i=0; i < 16; ++i)
{
if ((c = getc (fp)) == EOF)
{
if (!i)
break;
fputs (" ", stdout);
string[i+1] = '\0';
}
else
{
if (!i)
printf ("%08lx: ", address);
if (iso_flag)
string[i+1] =
(c < 0x20 || (c >= 0x7F && c < 0xa0)) ? '.' :c;
else
string[i+1] = (c < 0x20 || c >= 0x7F) ? '.' : c;
printf ("%02x", c);
}
if ((i&group_by) == group_by)
putchar (' ');
}
if (i)
puts (string);
if (c == EOF)
break;
address += 0x10;
}
}
if (fp != stdin)
fclose (fp);
} while (*argv != NULL);
return EXIT_SUCCESS;
}
void
usage ()
{
fprintf (stderr, "usage: %s [-de] [-iso]\n", progname);
exit (EXIT_FAILURE);
}
/* arch-tag: 20e04fb7-926e-4e48-be86-64fe869ecdaa
(do not change this comment) */
/* hexl.c ends here */