From 5b57d28ffb6e1ef86b50f7d05d977826eae89bfe Mon Sep 17 00:00:00 2001 From: Kiyoshi Aman Date: Fri, 1 Feb 2019 22:55:37 +0000 Subject: initial population --- usr.bin/expand/expand.c | 182 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 182 insertions(+) create mode 100644 usr.bin/expand/expand.c (limited to 'usr.bin/expand/expand.c') diff --git a/usr.bin/expand/expand.c b/usr.bin/expand/expand.c new file mode 100644 index 0000000..c69fda1 --- /dev/null +++ b/usr.bin/expand/expand.c @@ -0,0 +1,182 @@ +/* $NetBSD: expand.c,v 1.14 2016/09/05 00:40:28 sevan Exp $ */ + +/* + * Copyright (c) 1980, 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 +#ifndef lint +__COPYRIGHT("@(#) Copyright (c) 1980, 1993\ + The Regents of the University of California. All rights reserved."); +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)expand.c 8.1 (Berkeley) 6/9/93"; +#endif +__RCSID("$NetBSD: expand.c,v 1.14 2016/09/05 00:40:28 sevan Exp $"); +#endif /* not lint */ + +#include +#include +#include +#include +#include + +/* + * expand - expand tabs to equivalent spaces + */ +size_t nstops; +size_t tabstops[100]; + +static void getstops(const char *); +static void usage(void) __dead; + +int +main(int argc, char *argv[]) +{ + int c; + size_t n, column; + + setprogname(argv[0]); + + /* handle obsolete syntax */ + while (argc > 1 && + argv[1][0] == '-' && isdigit((unsigned char)argv[1][1])) { + getstops(&argv[1][1]); + argc--; argv++; + } + + while ((c = getopt (argc, argv, "t:")) != -1) { + switch (c) { + case 't': + getstops(optarg); + break; + case '?': + default: + usage(); + /* NOTREACHED */ + } + } + argc -= optind; + argv += optind; + + do { + if (argc > 0) { + if (freopen(argv[0], "r", stdin) == NULL) + err(EXIT_FAILURE, "Cannot open `%s'", argv[0]); + argc--, argv++; + } + column = 0; + while ((c = getchar()) != EOF) { + switch (c) { + case '\t': + if (nstops == 0) { + do { + putchar(' '); + column++; + } while (column & 07); + continue; + } + if (nstops == 1) { + do { + putchar(' '); + column++; + } while (((column - 1) % tabstops[0]) + != (tabstops[0] - 1)); + continue; + } + for (n = 0; n < nstops; n++) + if (tabstops[n] > column) + break; + if (n == nstops) { + putchar(' '); + column++; + continue; + } + while (column < tabstops[n]) { + putchar(' '); + column++; + } + continue; + + case '\b': + if (column) + column--; + putchar('\b'); + continue; + + default: + putchar(c); + column++; + continue; + + case '\n': + putchar(c); + column = 0; + continue; + } + } + } while (argc > 0); + return EXIT_SUCCESS; +} + +static void +getstops(const char *spec) +{ + int i; + const char *cp = spec; + + nstops = 0; + for (;;) { + i = 0; + while (*cp >= '0' && *cp <= '9') + i = i * 10 + *cp++ - '0'; + if (i <= 0 || i > 256) + errx(EXIT_FAILURE, "Too large tab stop spec `%d'", i); + if (nstops > 0 && (size_t)i <= tabstops[nstops-1]) + errx(EXIT_FAILURE, "Out of order tabstop spec `%d'", i); + if (nstops == sizeof(tabstops) / sizeof(tabstops[0]) - 1) + errx(EXIT_FAILURE, "Too many tabstops"); + tabstops[nstops++] = i; + if (*cp == '\0') + break; + if (*cp != ',' && *cp != ' ') + errx(EXIT_FAILURE, "Illegal tab stop spec `%s'", spec); + cp++; + } +} + +static void +usage(void) +{ + + (void)fprintf(stderr, "Usage: %s [-t tablist] [file ...]\n", + getprogname()); + exit(EXIT_FAILURE); +} -- cgit v1.2.3-70-g09d2