189 lines
4.2 KiB
C
189 lines
4.2 KiB
C
|
/* $OpenBSD: vis.c,v 1.22 2022/12/04 23:50:50 cheloha Exp $ */
|
||
|
/* $NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc 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 <stdio.h>
|
||
|
#include <string.h>
|
||
|
#include <stdlib.h>
|
||
|
#include <unistd.h>
|
||
|
#include <limits.h>
|
||
|
#include <err.h>
|
||
|
#include <vis.h>
|
||
|
|
||
|
int eflags, fold, foldwidth=80, none, markeol;
|
||
|
|
||
|
#ifdef DEBUG
|
||
|
int debug;
|
||
|
#endif
|
||
|
|
||
|
int foldit(char *, int, int);
|
||
|
void process(FILE *);
|
||
|
__dead void usage(void);
|
||
|
|
||
|
int
|
||
|
main(int argc, char *argv[])
|
||
|
{
|
||
|
const char *errstr;
|
||
|
FILE *fp;
|
||
|
int ch;
|
||
|
|
||
|
if (pledge("stdio rpath", NULL) == -1)
|
||
|
err(1, "pledge");
|
||
|
|
||
|
while ((ch = getopt(argc, argv, "anwctsobfF:ld")) != -1)
|
||
|
switch(ch) {
|
||
|
case 'a':
|
||
|
eflags |= VIS_ALL;
|
||
|
break;
|
||
|
case 'n':
|
||
|
none = 1;
|
||
|
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':
|
||
|
foldwidth = strtonum(optarg, 1, INT_MAX, &errstr);
|
||
|
if (errstr)
|
||
|
errx(1, "%s: %s", optarg, errstr);
|
||
|
if (foldwidth < 5)
|
||
|
errx(1, "can't fold lines to less than 5 cols");
|
||
|
/*FALLTHROUGH*/
|
||
|
case 'f':
|
||
|
fold = 1; /* fold output lines to 80 cols */
|
||
|
break; /* using hidden newline */
|
||
|
case 'l':
|
||
|
markeol = 1; /* mark end of line with \$ */
|
||
|
break;
|
||
|
#ifdef DEBUG
|
||
|
case 'd':
|
||
|
debug = 1;
|
||
|
break;
|
||
|
#endif
|
||
|
default:
|
||
|
usage();
|
||
|
}
|
||
|
argc -= optind;
|
||
|
argv += optind;
|
||
|
|
||
|
if (*argv)
|
||
|
while (*argv) {
|
||
|
if ((fp=fopen(*argv, "r")) != NULL) {
|
||
|
process(fp);
|
||
|
fclose(fp);
|
||
|
} else
|
||
|
warn("%s", *argv);
|
||
|
argv++;
|
||
|
}
|
||
|
else {
|
||
|
if (pledge("stdio", NULL) == -1)
|
||
|
err(1, "pledge");
|
||
|
process(stdin);
|
||
|
}
|
||
|
exit(0);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
process(FILE *fp)
|
||
|
{
|
||
|
static int col = 0;
|
||
|
char *cp = "\0";
|
||
|
int c, rachar;
|
||
|
char buff[5];
|
||
|
|
||
|
cp++; /* so *(cp-1) starts out != '\n' */
|
||
|
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");
|
||
|
}
|
||
|
|
||
|
__dead void
|
||
|
usage(void)
|
||
|
{
|
||
|
extern char *__progname;
|
||
|
|
||
|
fprintf(stderr, "usage: %s [-abcflnostw] [-F foldwidth] [file ...]\n",
|
||
|
__progname);
|
||
|
exit(1);
|
||
|
}
|