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