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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/* $Id$ */
/*
* Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2011, 2014 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 <assert.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "mandoc.h"
#include "mandoc_aux.h"
#include "libmandoc.h"
#define PRINT_HI 126
#define PRINT_LO 32
struct ln {
struct ln *next;
const char *code;
const char *ascii;
int unicode;
};
#define LINES_MAX 330
#define CHAR(in, ch, code) \
{ NULL, (in), (ch), (code) },
#define CHAR_TBL_START static struct ln lines[LINES_MAX] = {
#define CHAR_TBL_END };
#include "chars.in"
struct mchars {
struct ln **htab;
};
static const struct ln *find(const struct mchars *,
const char *, size_t);
void
mchars_free(struct mchars *arg)
{
free(arg->htab);
free(arg);
}
struct mchars *
mchars_alloc(void)
{
struct mchars *tab;
struct ln **htab;
struct ln *pp;
int i, hash;
/*
* Constructs a very basic chaining hashtable. The hash routine
* is simply the integral value of the first character.
* Subsequent entries are chained in the order they're processed.
*/
tab = mandoc_malloc(sizeof(struct mchars));
htab = mandoc_calloc(PRINT_HI - PRINT_LO + 1, sizeof(struct ln *));
for (i = 0; i < LINES_MAX; i++) {
hash = (int)lines[i].code[0] - PRINT_LO;
if (NULL == (pp = htab[hash])) {
htab[hash] = &lines[i];
continue;
}
for ( ; pp->next; pp = pp->next)
/* Scan ahead. */ ;
pp->next = &lines[i];
}
tab->htab = htab;
return(tab);
}
int
mchars_spec2cp(const struct mchars *arg, const char *p, size_t sz)
{
const struct ln *ln;
ln = find(arg, p, sz);
return(ln != NULL ? ln->unicode : sz == 1 ? *p : 0xFFFD);
}
char
mchars_num2char(const char *p, size_t sz)
{
int i;
if ((i = mandoc_strntoi(p, sz, 10)) < 0)
return('\0');
return(i > 0 && i < 256 && isprint(i) ? i : '\0');
}
int
mchars_num2uc(const char *p, size_t sz)
{
int i;
if ((i = mandoc_strntoi(p, sz, 16)) < 0)
return(0xFFFD);
/*
* XXX Code is missing here to exclude bogus ranges.
*/
return(i <= 0x10FFFF ? i : 0xFFFD);
}
const char *
mchars_spec2str(const struct mchars *arg,
const char *p, size_t sz, size_t *rsz)
{
const struct ln *ln;
ln = find(arg, p, sz);
if (ln == NULL) {
*rsz = 1;
return(sz == 1 ? p : NULL);
}
*rsz = strlen(ln->ascii);
return(ln->ascii);
}
const char *
mchars_uc2str(int uc)
{
int i;
for (i = 0; i < LINES_MAX; i++)
if (uc == lines[i].unicode)
return(lines[i].ascii);
return("<?>");
}
static const struct ln *
find(const struct mchars *tab, const char *p, size_t sz)
{
const struct ln *pp;
int hash;
assert(p);
if (0 == sz || p[0] < PRINT_LO || p[0] > PRINT_HI)
return(NULL);
hash = (int)p[0] - PRINT_LO;
for (pp = tab->htab[hash]; pp; pp = pp->next)
if (0 == strncmp(pp->code, p, sz) &&
'\0' == pp->code[(int)sz])
return(pp);
return(NULL);
}
|
