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/* $NetBSD: unvis.c,v 1.13 2010/11/27 19:46:25 christos Exp $ */
/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: unvis.c,v 1.13 2010/11/27 19:46:25 christos Exp $");
#endif /* not lint */
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <vis.h>
static void process(FILE *, const char *, int);
int
main(int argc, char *argv[])
{
FILE *fp;
int ch, eflags = 0;
setprogname(argv[0]);
while ((ch = getopt(argc, argv, "eHhm")) != -1)
switch((char)ch) {
case 'e':
eflags |= VIS_NOESCAPE;
break;
case 'H':
eflags |= VIS_HTTP1866;
break;
case 'h':
eflags |= VIS_HTTP1808;
break;
case 'm':
eflags |= VIS_MIMESTYLE;
break;
case '?':
default:
(void)fprintf(stderr,
"Usage: %s [-e] [-Hh | -m] [file...]\n",
getprogname());
return EXIT_FAILURE;
}
argc -= optind;
argv += optind;
switch (eflags & (VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE)) {
case VIS_HTTP1808|VIS_MIMESTYLE:
case VIS_HTTP1866|VIS_MIMESTYLE:
case VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE:
errx(EXIT_FAILURE, "Can't mix -m with -h and/or -H");
/*NOTREACHED*/
default:
break;
}
if (*argv)
while (*argv) {
if ((fp = fopen(*argv, "r")) != NULL)
process(fp, *argv, eflags);
else
warn("%s", *argv);
argv++;
}
else
process(stdin, "<stdin>", eflags);
return EXIT_SUCCESS;
}
static void
process(FILE *fp, const char *filename, int eflags)
{
int offset = 0, c, ret;
int state = 0;
char outc;
while ((c = getc(fp)) != EOF) {
offset++;
again:
switch(ret = unvis(&outc, (char)c, &state, eflags)) {
case UNVIS_VALID:
(void)putchar(outc);
break;
case UNVIS_VALIDPUSH:
(void)putchar(outc);
goto again;
case UNVIS_SYNBAD:
warnx("%s: offset: %d: can't decode", filename, offset);
state = 0;
break;
case 0:
case UNVIS_NOCHAR:
break;
default:
errx(1, "bad return value (%d), can't happen", ret);
/* NOTREACHED */
}
}
if (unvis(&outc, (char)0, &state, eflags | UNVIS_END) == UNVIS_VALID)
(void)putchar(outc);
}
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