1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/* $Id: term_tab.c,v 1.7 2021/10/04 18:56:31 schwarze Exp $ */
/*
* Copyright (c) 2017, 2021 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 <stdlib.h>
#include <string.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. */
struct tablist *r; /* Tablist currently being recorded. */
size_t d; /* Default tab width in units of n. */
} tabs;
void
term_tab_set(const struct termp *p, const char *arg)
{
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;
tabs.r = &tabs.a;
if (tabs.d == 0) {
a2roffsu(".8i", &su, SCALE_IN);
tabs.d = term_hen(p, &su);
}
return;
}
if (arg[0] == 'T' && arg[1] == '\0') {
tabs.r = &tabs.p;
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 = tabs.r;
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];
}
}
void
term_tab_free(void)
{
free(tabs.a.t);
free(tabs.p.t);
memset(&tabs, 0, sizeof(tabs));
tabs.r = &tabs.a;
}
|
