diff options
Diffstat (limited to 'unvis.c')
| -rw-r--r-- | unvis.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/unvis.c b/unvis.c new file mode 100644 index 000000000000..d854a3731171 --- /dev/null +++ b/unvis.c @@ -0,0 +1,138 @@ +/* $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); +} |