243 lines
6.1 KiB
C
243 lines
6.1 KiB
C
/* $NetBSD: tabs.c,v 1.2 2009/01/18 07:08:30 lukem Exp $ */
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/*-
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* Copyright (c) 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Roy Marples.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 2008 \
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The NetBSD Foundation, inc. All rights reserved.");
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__RCSID("$NetBSD: tabs.c,v 1.2 2009/01/18 07:08:30 lukem Exp $");
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#endif /* not lint */
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termcap.h>
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#include <unistd.h>
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#define NSTOPS 20
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struct tabspec {
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const char *opt;
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const char *spec;
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};
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static const struct tabspec tabspecs[] = {
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{"a", "1,10,16,36,72"},
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{"a2", "1,10,16,40,72"},
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{"c", "1,8,12,16,20,55"},
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{"c2", "1,6,10,14,49"},
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{"c3", "1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67"},
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{"f", "1,7,11,15,19,23"},
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{"p", "1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61"},
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{"s", "1,10,55"},
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{"u", "1,12,20,44"}
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};
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static const size_t ntabspecs = sizeof(tabspecs) / sizeof(tabspecs[0]);
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static char tbuf[2048];
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: tabs [-n|-a|-a2|-c|-c2|-c3|-f|-p|-s|-u] [+m[n]]"
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" [-T type]\n"
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" tabs [-T type] [+[n]] n1[,n2,...]\n");
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exit(EXIT_FAILURE);
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/* NOTREACHED */
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}
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int
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main(int argc, char **argv)
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{
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char *term, *arg, *tbp, *token, *end, *tabs = NULL, *p;
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const char *cr, *ct, *st, *ML, *spec = NULL;
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int i, n, inc = 8, stops[NSTOPS], nstops, last, cols, margin = 0;
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size_t j;
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struct winsize ws;
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term = getenv("TERM");
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for (i = 1; i < argc; i++) {
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if (argv[i][0] == '+') {
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arg = argv[i] + 1;
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if (arg[0] == 'm')
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arg++;
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if (arg[0] == '\0')
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margin = 10;
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else {
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errno = 0;
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margin = strtol(arg, &end, 10);
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if (errno != 0 || *end != '\0' || margin < 0)
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errx(EXIT_FAILURE,
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"%s: invalid margin", arg);
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}
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continue;
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}
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if (argv[i][0] != '-') {
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tabs = argv[i];
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break;
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}
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arg = argv[i] + 1;
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if (arg[0] == '\0')
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usage();
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if (arg[0] == '-' && arg[1] == '\0') {
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if (argv[i + 1] != '\0')
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tabs = argv[i + 1];
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break;
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}
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if (arg[0] == 'T' && arg[1] == '\0') {
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term = argv[++i];
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if (term == NULL)
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usage();
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continue;
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}
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if (isdigit((int)arg[0])) {
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if (arg[1] != '\0')
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errx(EXIT_FAILURE,
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"%s: invalid increament", arg);
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inc = arg[0] - '0';
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continue;
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}
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for (j = 0; j < ntabspecs; j++) {
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if (arg[0] == tabspecs[j].opt[0] &&
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arg[1] == tabspecs[j].opt[1]) {
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spec = tabspecs[j].spec;
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break;
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}
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}
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if (j == ntabspecs)
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usage();
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}
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if (tabs == NULL && spec != NULL)
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tabs = strdup(spec);
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if (tabs != NULL)
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last = nstops = 0;
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else
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nstops = -1;
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p = tabs;
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while ((token = strsep(&p, ", ")) != NULL) {
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if (*token == '\0')
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continue;
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if (nstops >= NSTOPS)
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errx(EXIT_FAILURE,
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"too many tab stops (max %d)", NSTOPS);
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errno = 0;
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n = strtol(token, &end, 10);
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if (errno != 0 || *end != '\0' || n <= 0)
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errx(EXIT_FAILURE, "%s: invalid tab stop", token);
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if (*token == '+') {
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if (nstops == 0)
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errx(EXIT_FAILURE,
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"first tab stop may not be relative");
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n += last;
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}
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if (last > n)
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errx(EXIT_FAILURE, "tab stops may not go backwards");
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last = stops[nstops++] = n;
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}
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if (term == NULL)
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errx(EXIT_FAILURE, "no value for $TERM and -T not given");
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switch (tgetent(tbuf, term)) {
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case -1:
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err(EXIT_FAILURE, "termcap database");
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case 0:
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errx(EXIT_FAILURE, "%s: no termcap entry", term);
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}
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tbp = tbuf;
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cr = tgetstr("cr", &tbp);
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if (cr == NULL)
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cr = "\r";
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ct = tgetstr("ct", &tbp);
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if (ct == NULL)
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errx(EXIT_FAILURE, "terminal cannot clear tabs");
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st = tgetstr("st", &tbp);
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if (st == NULL)
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errx(EXIT_FAILURE, "terminal cannot set tabs");
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ML = tgetstr("ML", &tbp);
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/* Clear existing tabs */
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tputs(cr, 1, putchar);
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tputs(ct, 1, putchar);
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tputs(cr, 1, putchar);
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if (ML != NULL) {
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printf("%*s", margin, "");
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tputs(ML, 1, putchar);
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} else if (margin != 0)
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warnx("terminal cannot set left margin");
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if (nstops >= 0) {
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printf("%*s", stops[0] - 1, "");
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tputs(st, 1, putchar);
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for (i = 1; i < nstops; i++) {
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printf("%*s", stops[i] - stops[i - 1], "");
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tputs(st, 1, putchar);
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}
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} else if (inc > 0) {
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cols = 0;
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term = getenv("COLUMNS");
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if (term != NULL) {
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errno = 0;
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cols = strtol(term, &end, 10);
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if (errno != 0 || *end != '\0' || cols < 0)
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cols = 0;
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}
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if (cols == 0) {
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0)
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cols = ws.ws_col;
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else {
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cols = tgetnum("co");
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if (cols == 0) {
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cols = 80;
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warnx("terminal does not specify number"
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"columns; defaulting to %d",
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cols);
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}
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}
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}
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for (i = 0; i < cols / inc; i++) {
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printf("%*s", inc, "");
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tputs(st, 1, putchar);
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}
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}
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tputs(cr, 1, putchar);
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exit(EXIT_SUCCESS);
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/* NOTREACHED */
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}
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