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