NetBSD/usr.bin/vis/vis.c

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/* $NetBSD: vis.c,v 1.15 2009/02/11 06:42:31 wiz Exp $ */
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/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
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*
* 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
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* 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>
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#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93";
#endif
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__RCSID("$NetBSD: vis.c,v 1.15 2009/02/11 06:42:31 wiz Exp $");
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#endif /* not lint */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
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#include <vis.h>
#include "extern.h"
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static int eflags, fold, foldwidth = 80, none, markeol;
#ifdef DEBUG
int debug;
#endif
static char *extra;
static void process(FILE *);
int
main(int argc, char *argv[])
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{
FILE *fp;
int ch;
int rval;
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while ((ch = getopt(argc, argv, "bcde:F:fhlmnostw")) != -1)
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switch((char)ch) {
case 'b':
eflags |= VIS_NOSLASH;
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break;
case 'c':
eflags |= VIS_CSTYLE;
break;
#ifdef DEBUG
case 'd':
debug++;
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break;
#endif
case 'e':
extra = optarg;
break;
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case 'F':
if ((foldwidth = atoi(optarg)) < 5) {
errx(1, "can't fold lines to less than 5 cols");
/* NOTREACHED */
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}
markeol++;
break;
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case 'f':
fold++; /* fold output lines to 80 cols */
break; /* using hidden newline */
case 'h':
eflags |= VIS_HTTPSTYLE;
break;
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case 'l':
markeol++; /* mark end of line with \$ */
break;
case 'm':
eflags |= VIS_MIMESTYLE;
if (foldwidth == 80)
foldwidth = 76;
break;
case 'n':
none++;
break;
case 'o':
eflags |= VIS_OCTAL;
break;
case 's':
eflags |= VIS_SAFE;
break;
case 't':
eflags |= VIS_TAB;
break;
case 'w':
eflags |= VIS_WHITE;
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break;
case '?':
default:
(void)fprintf(stderr,
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"Usage: %s [-bcfhlmnostw] [-e extra]"
" [-F foldwidth] [file ...]\n", getprogname());
return 1;
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}
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if ((eflags & (VIS_HTTPSTYLE|VIS_MIMESTYLE)) ==
(VIS_HTTPSTYLE|VIS_MIMESTYLE))
errx(1, "Can't specify -m and -h at the same time");
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argc -= optind;
argv += optind;
rval = 0;
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if (*argv)
while (*argv) {
if ((fp = fopen(*argv, "r")) != NULL) {
process(fp);
(void)fclose(fp);
} else {
warn("%s", *argv);
rval = 1;
}
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argv++;
}
else
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process(stdin);
return rval;
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}
static void
process(FILE *fp)
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{
static int col = 0;
static char nul[] = "\0";
char *cp = nul + 1; /* so *(cp-1) starts out != '\n' */
int c, rachar;
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char buff[5];
c = getc(fp);
while (c != EOF) {
rachar = getc(fp);
if (none) {
cp = buff;
*cp++ = c;
if (c == '\\')
*cp++ = '\\';
*cp = '\0';
} else if (markeol && c == '\n') {
cp = buff;
if ((eflags & VIS_NOSLASH) == 0)
*cp++ = '\\';
*cp++ = '$';
*cp++ = '\n';
*cp = '\0';
} else if (extra)
(void)svis(buff, (char)c, eflags, (char)rachar, extra);
else
(void)vis(buff, (char)c, eflags, (char)rachar);
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cp = buff;
if (fold) {
#ifdef DEBUG
if (debug)
(void)printf("<%02d,", col);
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#endif
col = foldit(cp, col, foldwidth, eflags);
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#ifdef DEBUG
if (debug)
(void)printf("%02d>", col);
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#endif
}
do {
(void)putchar(*cp);
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} while (*++cp);
c = rachar;
}
/*
* terminate partial line with a hidden newline
*/
if (fold && *(cp - 1) != '\n')
(void)printf(eflags & VIS_MIMESTYLE ? "=\n" : "\\\n");
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}