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Diffstat (limited to 'text_cmds/vis/vis.c')
| -rw-r--r-- | text_cmds/vis/vis.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/text_cmds/vis/vis.c b/text_cmds/vis/vis.c new file mode 100644 index 0000000..703dec5 --- /dev/null +++ b/text_cmds/vis/vis.c @@ -0,0 +1,194 @@ +/*- + * 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. + */ + +#include <sys/cdefs.h> + +__FBSDID("$FreeBSD: src/usr.bin/vis/vis.c,v 1.10 2002/09/04 23:29:09 dwmalone Exp $"); + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1989, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif + +#ifndef lint +static const char sccsid[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93"; +#endif + +#include <err.h> +#include <locale.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <vis.h> +#include <sysexits.h> + +#include "extern.h" + +int eflags, fold, foldwidth=80, none, markeol, debug; + +void process(FILE *); +static void usage(void); + +int +main(int argc, 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); + else + warn("%s", *argv); + argv++; + } + else + process(stdin); + exit(0); +} + + +static void +usage(void) +{ +#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(FILE *fp) +{ + static int col = 0; + static char dummy[] = "\0"; + char *cp = dummy+1; /* so *(cp-1) starts out != '\n' */ + 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"); + + if (ferror(fp)) + errx(EX_IOERR, NULL); +} |