131 lines
3.0 KiB
C
131 lines
3.0 KiB
C
/* $Id: term_tab.c,v 1.6 2020/06/22 19:20:40 schwarze Exp $ */
|
|
/*
|
|
* Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
#include "config.h"
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <stddef.h>
|
|
|
|
#include "mandoc_aux.h"
|
|
#include "out.h"
|
|
#include "term.h"
|
|
|
|
struct tablist {
|
|
size_t *t; /* Allocated array of tab positions. */
|
|
size_t s; /* Allocated number of positions. */
|
|
size_t n; /* Currently used number of positions. */
|
|
};
|
|
|
|
static struct {
|
|
struct tablist a; /* All tab positions for lookup. */
|
|
struct tablist p; /* Periodic tab positions to add. */
|
|
size_t d; /* Default tab width in units of n. */
|
|
} tabs;
|
|
|
|
|
|
void
|
|
term_tab_set(const struct termp *p, const char *arg)
|
|
{
|
|
static int recording_period;
|
|
|
|
struct roffsu su;
|
|
struct tablist *tl;
|
|
size_t pos;
|
|
int add;
|
|
|
|
/* Special arguments: clear all tabs or switch lists. */
|
|
|
|
if (arg == NULL) {
|
|
tabs.a.n = tabs.p.n = 0;
|
|
recording_period = 0;
|
|
if (tabs.d == 0) {
|
|
a2roffsu(".8i", &su, SCALE_IN);
|
|
tabs.d = term_hen(p, &su);
|
|
}
|
|
return;
|
|
}
|
|
if (arg[0] == 'T' && arg[1] == '\0') {
|
|
recording_period = 1;
|
|
return;
|
|
}
|
|
|
|
/* Parse the sign, the number, and the unit. */
|
|
|
|
if (*arg == '+') {
|
|
add = 1;
|
|
arg++;
|
|
} else
|
|
add = 0;
|
|
if (a2roffsu(arg, &su, SCALE_EM) == NULL)
|
|
return;
|
|
|
|
/* Select the list, and extend it if it is full. */
|
|
|
|
tl = recording_period ? &tabs.p : &tabs.a;
|
|
if (tl->n >= tl->s) {
|
|
tl->s += 8;
|
|
tl->t = mandoc_reallocarray(tl->t, tl->s, sizeof(*tl->t));
|
|
}
|
|
|
|
/* Append the new position. */
|
|
|
|
pos = term_hen(p, &su);
|
|
tl->t[tl->n] = pos;
|
|
if (add && tl->n)
|
|
tl->t[tl->n] += tl->t[tl->n - 1];
|
|
tl->n++;
|
|
}
|
|
|
|
/*
|
|
* Simplified version without a parser,
|
|
* never incremental, never periodic, for use by tbl(7).
|
|
*/
|
|
void
|
|
term_tab_iset(size_t inc)
|
|
{
|
|
if (tabs.a.n >= tabs.a.s) {
|
|
tabs.a.s += 8;
|
|
tabs.a.t = mandoc_reallocarray(tabs.a.t, tabs.a.s,
|
|
sizeof(*tabs.a.t));
|
|
}
|
|
tabs.a.t[tabs.a.n++] = inc;
|
|
}
|
|
|
|
size_t
|
|
term_tab_next(size_t prev)
|
|
{
|
|
size_t i, j;
|
|
|
|
for (i = 0;; i++) {
|
|
if (i == tabs.a.n) {
|
|
if (tabs.p.n == 0)
|
|
return prev;
|
|
tabs.a.n += tabs.p.n;
|
|
if (tabs.a.s < tabs.a.n) {
|
|
tabs.a.s = tabs.a.n;
|
|
tabs.a.t = mandoc_reallocarray(tabs.a.t,
|
|
tabs.a.s, sizeof(*tabs.a.t));
|
|
}
|
|
for (j = 0; j < tabs.p.n; j++)
|
|
tabs.a.t[i + j] = tabs.p.t[j] +
|
|
(i ? tabs.a.t[i - 1] : 0);
|
|
}
|
|
if (prev < tabs.a.t[i])
|
|
return tabs.a.t[i];
|
|
}
|
|
}
|