1*6d38604fSBaptiste Daroussin /* $Id: term_tab.c,v 1.6 2020/06/22 19:20:40 schwarze Exp $ */
261d06d6bSBaptiste Daroussin /*
361d06d6bSBaptiste Daroussin * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
461d06d6bSBaptiste Daroussin *
561d06d6bSBaptiste Daroussin * Permission to use, copy, modify, and distribute this software for any
661d06d6bSBaptiste Daroussin * purpose with or without fee is hereby granted, provided that the above
761d06d6bSBaptiste Daroussin * copyright notice and this permission notice appear in all copies.
861d06d6bSBaptiste Daroussin *
961d06d6bSBaptiste Daroussin * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
1061d06d6bSBaptiste Daroussin * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1161d06d6bSBaptiste Daroussin * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
1261d06d6bSBaptiste Daroussin * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1361d06d6bSBaptiste Daroussin * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1461d06d6bSBaptiste Daroussin * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1561d06d6bSBaptiste Daroussin * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1661d06d6bSBaptiste Daroussin */
17*6d38604fSBaptiste Daroussin #include "config.h"
18*6d38604fSBaptiste Daroussin
1961d06d6bSBaptiste Daroussin #include <sys/types.h>
2061d06d6bSBaptiste Daroussin
2161d06d6bSBaptiste Daroussin #include <stddef.h>
2261d06d6bSBaptiste Daroussin
2361d06d6bSBaptiste Daroussin #include "mandoc_aux.h"
2461d06d6bSBaptiste Daroussin #include "out.h"
2561d06d6bSBaptiste Daroussin #include "term.h"
2661d06d6bSBaptiste Daroussin
2761d06d6bSBaptiste Daroussin struct tablist {
2861d06d6bSBaptiste Daroussin size_t *t; /* Allocated array of tab positions. */
2961d06d6bSBaptiste Daroussin size_t s; /* Allocated number of positions. */
3061d06d6bSBaptiste Daroussin size_t n; /* Currently used number of positions. */
3161d06d6bSBaptiste Daroussin };
3261d06d6bSBaptiste Daroussin
3361d06d6bSBaptiste Daroussin static struct {
3461d06d6bSBaptiste Daroussin struct tablist a; /* All tab positions for lookup. */
3561d06d6bSBaptiste Daroussin struct tablist p; /* Periodic tab positions to add. */
3661d06d6bSBaptiste Daroussin size_t d; /* Default tab width in units of n. */
3761d06d6bSBaptiste Daroussin } tabs;
3861d06d6bSBaptiste Daroussin
3961d06d6bSBaptiste Daroussin
4061d06d6bSBaptiste Daroussin void
term_tab_set(const struct termp * p,const char * arg)4161d06d6bSBaptiste Daroussin term_tab_set(const struct termp *p, const char *arg)
4261d06d6bSBaptiste Daroussin {
4361d06d6bSBaptiste Daroussin static int recording_period;
4461d06d6bSBaptiste Daroussin
4561d06d6bSBaptiste Daroussin struct roffsu su;
4661d06d6bSBaptiste Daroussin struct tablist *tl;
4761d06d6bSBaptiste Daroussin size_t pos;
4861d06d6bSBaptiste Daroussin int add;
4961d06d6bSBaptiste Daroussin
5061d06d6bSBaptiste Daroussin /* Special arguments: clear all tabs or switch lists. */
5161d06d6bSBaptiste Daroussin
5261d06d6bSBaptiste Daroussin if (arg == NULL) {
5361d06d6bSBaptiste Daroussin tabs.a.n = tabs.p.n = 0;
5461d06d6bSBaptiste Daroussin recording_period = 0;
5561d06d6bSBaptiste Daroussin if (tabs.d == 0) {
5661d06d6bSBaptiste Daroussin a2roffsu(".8i", &su, SCALE_IN);
5761d06d6bSBaptiste Daroussin tabs.d = term_hen(p, &su);
5861d06d6bSBaptiste Daroussin }
5961d06d6bSBaptiste Daroussin return;
6061d06d6bSBaptiste Daroussin }
6161d06d6bSBaptiste Daroussin if (arg[0] == 'T' && arg[1] == '\0') {
6261d06d6bSBaptiste Daroussin recording_period = 1;
6361d06d6bSBaptiste Daroussin return;
6461d06d6bSBaptiste Daroussin }
6561d06d6bSBaptiste Daroussin
6661d06d6bSBaptiste Daroussin /* Parse the sign, the number, and the unit. */
6761d06d6bSBaptiste Daroussin
6861d06d6bSBaptiste Daroussin if (*arg == '+') {
6961d06d6bSBaptiste Daroussin add = 1;
7061d06d6bSBaptiste Daroussin arg++;
7161d06d6bSBaptiste Daroussin } else
7261d06d6bSBaptiste Daroussin add = 0;
7361d06d6bSBaptiste Daroussin if (a2roffsu(arg, &su, SCALE_EM) == NULL)
7461d06d6bSBaptiste Daroussin return;
7561d06d6bSBaptiste Daroussin
7661d06d6bSBaptiste Daroussin /* Select the list, and extend it if it is full. */
7761d06d6bSBaptiste Daroussin
7861d06d6bSBaptiste Daroussin tl = recording_period ? &tabs.p : &tabs.a;
7961d06d6bSBaptiste Daroussin if (tl->n >= tl->s) {
8061d06d6bSBaptiste Daroussin tl->s += 8;
8161d06d6bSBaptiste Daroussin tl->t = mandoc_reallocarray(tl->t, tl->s, sizeof(*tl->t));
8261d06d6bSBaptiste Daroussin }
8361d06d6bSBaptiste Daroussin
8461d06d6bSBaptiste Daroussin /* Append the new position. */
8561d06d6bSBaptiste Daroussin
8661d06d6bSBaptiste Daroussin pos = term_hen(p, &su);
8761d06d6bSBaptiste Daroussin tl->t[tl->n] = pos;
8861d06d6bSBaptiste Daroussin if (add && tl->n)
8961d06d6bSBaptiste Daroussin tl->t[tl->n] += tl->t[tl->n - 1];
9061d06d6bSBaptiste Daroussin tl->n++;
9161d06d6bSBaptiste Daroussin }
9261d06d6bSBaptiste Daroussin
9361d06d6bSBaptiste Daroussin /*
9461d06d6bSBaptiste Daroussin * Simplified version without a parser,
9561d06d6bSBaptiste Daroussin * never incremental, never periodic, for use by tbl(7).
9661d06d6bSBaptiste Daroussin */
9761d06d6bSBaptiste Daroussin void
term_tab_iset(size_t inc)9861d06d6bSBaptiste Daroussin term_tab_iset(size_t inc)
9961d06d6bSBaptiste Daroussin {
10061d06d6bSBaptiste Daroussin if (tabs.a.n >= tabs.a.s) {
10161d06d6bSBaptiste Daroussin tabs.a.s += 8;
10261d06d6bSBaptiste Daroussin tabs.a.t = mandoc_reallocarray(tabs.a.t, tabs.a.s,
10361d06d6bSBaptiste Daroussin sizeof(*tabs.a.t));
10461d06d6bSBaptiste Daroussin }
10561d06d6bSBaptiste Daroussin tabs.a.t[tabs.a.n++] = inc;
10661d06d6bSBaptiste Daroussin }
10761d06d6bSBaptiste Daroussin
10861d06d6bSBaptiste Daroussin size_t
term_tab_next(size_t prev)10961d06d6bSBaptiste Daroussin term_tab_next(size_t prev)
11061d06d6bSBaptiste Daroussin {
11161d06d6bSBaptiste Daroussin size_t i, j;
11261d06d6bSBaptiste Daroussin
11361d06d6bSBaptiste Daroussin for (i = 0;; i++) {
11461d06d6bSBaptiste Daroussin if (i == tabs.a.n) {
11561d06d6bSBaptiste Daroussin if (tabs.p.n == 0)
11661d06d6bSBaptiste Daroussin return prev;
11761d06d6bSBaptiste Daroussin tabs.a.n += tabs.p.n;
11861d06d6bSBaptiste Daroussin if (tabs.a.s < tabs.a.n) {
11961d06d6bSBaptiste Daroussin tabs.a.s = tabs.a.n;
12061d06d6bSBaptiste Daroussin tabs.a.t = mandoc_reallocarray(tabs.a.t,
12161d06d6bSBaptiste Daroussin tabs.a.s, sizeof(*tabs.a.t));
12261d06d6bSBaptiste Daroussin }
12361d06d6bSBaptiste Daroussin for (j = 0; j < tabs.p.n; j++)
12461d06d6bSBaptiste Daroussin tabs.a.t[i + j] = tabs.p.t[j] +
12561d06d6bSBaptiste Daroussin (i ? tabs.a.t[i - 1] : 0);
12661d06d6bSBaptiste Daroussin }
12761d06d6bSBaptiste Daroussin if (prev < tabs.a.t[i])
12861d06d6bSBaptiste Daroussin return tabs.a.t[i];
12961d06d6bSBaptiste Daroussin }
13061d06d6bSBaptiste Daroussin }
131