/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <err.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <vis.h>
int eflags, fold, foldwidth=80, none, markeol, debug;
void process __P((FILE *, char *filename));
static void usage __P((void));
extern int foldit __P((char *, int, int));
int
main(argc, argv)
char *argv[];
{
FILE *fp;
int ch;
(void) setlocale(LC_CTYPE, "");
while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != -1)
switch((char)ch) {
case 'n':
none++;
break;
case 'w':
eflags |= VIS_WHITE;
break;
case 'c':
eflags |= VIS_CSTYLE;
break;
case 't':
eflags |= VIS_TAB;
break;
case 's':
eflags |= VIS_SAFE;
break;
case 'o':
eflags |= VIS_OCTAL;
break;
case 'b':
eflags |= VIS_NOSLASH;
break;
case 'F':
if ((foldwidth = atoi(optarg))<5)
errx(1, "can't fold lines to less than 5 cols");
/*FALLTHROUGH*/
case 'f':
fold++; /* fold output lines to 80 cols */
break; /* using hidden newline */
case 'l':
markeol++; /* mark end of line with \$ */
break;
#ifdef DEBUG
case 'd':
debug++;
break;
#endif
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (*argv)
while (*argv) {
if ((fp=fopen(*argv, "r")) != NULL)
process(fp, *argv);
else
warn("%s", *argv);
argv++;
}
else
process(stdin, "<stdin>");
exit(0);
}
static void
usage()
{
#ifdef DEBUG
fprintf(stderr, "usage: vis [-cbflnostwd] [-F foldwidth] [file ...]\n");
#else
fprintf(stderr, "usage: vis [-cbflnostw] [-F foldwidth] [file ...]\n");
#endif
exit(1);
}
void
process(fp, filename)
FILE *fp;
char *filename;
{
static int col = 0;
register char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */
register int c, rachar;
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
(void) vis(buff, (char)c, eflags, (char)rachar);
cp = buff;
if (fold) {
#ifdef DEBUG
if (debug)
printf("<%02d,", col);
#endif
col = foldit(cp, col, foldwidth);
#ifdef DEBUG
if (debug)
printf("%02d>", col);
#endif
}
do {
putchar(*cp);
} while (*++cp);
c = rachar;
}
/*
* terminate partial line with a hidden newline
*/
if (fold && *(cp-1) != '\n')
printf("\\\n");
}
