term_tab.c (6d38604fc532a3fc060788e3ce40464b46047eaf) term_tab.c (c1c95add8c80843ba15d784f95c361d795b1f593)
1/* $Id: term_tab.c,v 1.6 2020/06/22 19:20:40 schwarze Exp $ */
1/* $Id: term_tab.c,v 1.7 2021/10/04 18:56:31 schwarze Exp $ */
2/*
2/*
3 * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
3 * Copyright (c) 2017, 2021 Ingo Schwarze <schwarze@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17#include "config.h"
18
19#include <sys/types.h>
20
21#include <stddef.h>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17#include "config.h"
18
19#include <sys/types.h>
20
21#include <stddef.h>
22#include <stdlib.h>
23#include <string.h>
22
23#include "mandoc_aux.h"
24#include "out.h"
25#include "term.h"
26
27struct tablist {
28 size_t *t; /* Allocated array of tab positions. */
29 size_t s; /* Allocated number of positions. */
30 size_t n; /* Currently used number of positions. */
31};
32
33static struct {
34 struct tablist a; /* All tab positions for lookup. */
35 struct tablist p; /* Periodic tab positions to add. */
24
25#include "mandoc_aux.h"
26#include "out.h"
27#include "term.h"
28
29struct tablist {
30 size_t *t; /* Allocated array of tab positions. */
31 size_t s; /* Allocated number of positions. */
32 size_t n; /* Currently used number of positions. */
33};
34
35static struct {
36 struct tablist a; /* All tab positions for lookup. */
37 struct tablist p; /* Periodic tab positions to add. */
38 struct tablist *r; /* Tablist currently being recorded. */
36 size_t d; /* Default tab width in units of n. */
37} tabs;
38
39
40void
41term_tab_set(const struct termp *p, const char *arg)
42{
39 size_t d; /* Default tab width in units of n. */
40} tabs;
41
42
43void
44term_tab_set(const struct termp *p, const char *arg)
45{
43 static int recording_period;
44
45 struct roffsu su;
46 struct tablist *tl;
47 size_t pos;
48 int add;
49
50 /* Special arguments: clear all tabs or switch lists. */
51
52 if (arg == NULL) {
53 tabs.a.n = tabs.p.n = 0;
46 struct roffsu su;
47 struct tablist *tl;
48 size_t pos;
49 int add;
50
51 /* Special arguments: clear all tabs or switch lists. */
52
53 if (arg == NULL) {
54 tabs.a.n = tabs.p.n = 0;
54 recording_period = 0;
55 tabs.r = &tabs.a;
55 if (tabs.d == 0) {
56 a2roffsu(".8i", &su, SCALE_IN);
57 tabs.d = term_hen(p, &su);
58 }
59 return;
60 }
61 if (arg[0] == 'T' && arg[1] == '\0') {
56 if (tabs.d == 0) {
57 a2roffsu(".8i", &su, SCALE_IN);
58 tabs.d = term_hen(p, &su);
59 }
60 return;
61 }
62 if (arg[0] == 'T' && arg[1] == '\0') {
62 recording_period = 1;
63 tabs.r = &tabs.p;
63 return;
64 }
65
66 /* Parse the sign, the number, and the unit. */
67
68 if (*arg == '+') {
69 add = 1;
70 arg++;
71 } else
72 add = 0;
73 if (a2roffsu(arg, &su, SCALE_EM) == NULL)
74 return;
75
76 /* Select the list, and extend it if it is full. */
77
64 return;
65 }
66
67 /* Parse the sign, the number, and the unit. */
68
69 if (*arg == '+') {
70 add = 1;
71 arg++;
72 } else
73 add = 0;
74 if (a2roffsu(arg, &su, SCALE_EM) == NULL)
75 return;
76
77 /* Select the list, and extend it if it is full. */
78
78 tl = recording_period ? &tabs.p : &tabs.a;
79 tl = tabs.r;
79 if (tl->n >= tl->s) {
80 tl->s += 8;
81 tl->t = mandoc_reallocarray(tl->t, tl->s, sizeof(*tl->t));
82 }
83
84 /* Append the new position. */
85
86 pos = term_hen(p, &su);

--- 36 unchanged lines hidden (view full) ---

123 for (j = 0; j < tabs.p.n; j++)
124 tabs.a.t[i + j] = tabs.p.t[j] +
125 (i ? tabs.a.t[i - 1] : 0);
126 }
127 if (prev < tabs.a.t[i])
128 return tabs.a.t[i];
129 }
130}
80 if (tl->n >= tl->s) {
81 tl->s += 8;
82 tl->t = mandoc_reallocarray(tl->t, tl->s, sizeof(*tl->t));
83 }
84
85 /* Append the new position. */
86
87 pos = term_hen(p, &su);

--- 36 unchanged lines hidden (view full) ---

124 for (j = 0; j < tabs.p.n; j++)
125 tabs.a.t[i + j] = tabs.p.t[j] +
126 (i ? tabs.a.t[i - 1] : 0);
127 }
128 if (prev < tabs.a.t[i])
129 return tabs.a.t[i];
130 }
131}
132
133void
134term_tab_free(void)
135{
136 free(tabs.a.t);
137 free(tabs.p.t);
138 memset(&tabs, 0, sizeof(tabs));
139 tabs.r = &tabs.a;
140}