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
|
/* Helper functions used by strftime/strptime to handle locale-specific "eras".
Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include "../locale/localeinfo.h"
#include <libc-lock.h>
#include <stdlib.h>
#include <wchar.h>
#include <string.h>
#include <stdint.h>
/* Some of the functions here must not be used while setlocale is called. */
__libc_rwlock_define (extern, __libc_setlocale_lock attribute_hidden)
#define CURRENT(item) (current->values[_NL_ITEM_INDEX (item)].string)
#define CURRENT_WORD(item) (current->values[_NL_ITEM_INDEX (item)].word)
#define ERA_DATE_CMP(a, b) \
(a[0] < b[0] || (a[0] == b[0] && (a[1] < b[1] \
|| (a[1] == b[1] && a[2] <= b[2]))))
/* Look up the era information in CURRENT's locale strings and
cache it in CURRENT->private. */
static void
_nl_init_era_entries (struct __locale_data *current)
{
size_t cnt;
struct lc_time_data *data;
/* Avoid touching CURRENT if there is no data at all, for _nl_C_LC_TIME. */
if (CURRENT_WORD (_NL_TIME_ERA_NUM_ENTRIES) == 0)
return;
__libc_rwlock_wrlock (__libc_setlocale_lock);
if (current->private.time == NULL)
{
current->private.time = malloc (sizeof *current->private.time);
if (current->private.time == NULL)
goto out;
memset (current->private.time, 0, sizeof *current->private.time);
current->private.cleanup = &_nl_cleanup_time;
}
data = current->private.time;
if (! data->era_initialized)
{
size_t new_num_eras = CURRENT_WORD (_NL_TIME_ERA_NUM_ENTRIES);
if (new_num_eras == 0)
{
if (data->eras != NULL)
{
free (data->eras);
data->eras = NULL;
}
}
else
{
struct era_entry *new_eras = data->eras;
if (data->num_eras != new_num_eras)
new_eras =
(struct era_entry *) realloc (data->eras,
new_num_eras
* sizeof (struct era_entry));
if (new_eras == NULL)
{
free (data->eras);
data->num_eras = 0;
data->eras = NULL;
}
else
{
const char *ptr = CURRENT (_NL_TIME_ERA_ENTRIES);
data->num_eras = new_num_eras;
data->eras = new_eras;
for (cnt = 0; cnt < new_num_eras; ++cnt)
{
const char *base_ptr = ptr;
memcpy ((void *) (new_eras + cnt), (const void *) ptr,
sizeof (uint32_t) * 8);
if (ERA_DATE_CMP(new_eras[cnt].start_date,
new_eras[cnt].stop_date))
if (new_eras[cnt].direction == (uint32_t) '+')
new_eras[cnt].absolute_direction = 1;
else
new_eras[cnt].absolute_direction = -1;
else
if (new_eras[cnt].direction == (uint32_t) '+')
new_eras[cnt].absolute_direction = -1;
else
new_eras[cnt].absolute_direction = 1;
/* Skip numeric values. */
ptr += sizeof (uint32_t) * 8;
/* Set and skip era name. */
new_eras[cnt].era_name = ptr;
ptr = strchr (ptr, '\0') + 1;
/* Set and skip era format. */
new_eras[cnt].era_format = ptr;
ptr = strchr (ptr, '\0') + 1;
ptr += 3 - (((ptr - (const char *) base_ptr) + 3) & 3);
/* Set and skip wide era name. */
new_eras[cnt].era_wname = (wchar_t *) ptr;
ptr = (char *) (__wcschr ((wchar_t *) ptr, L'\0') + 1);
/* Set and skip wide era format. */
new_eras[cnt].era_wformat = (wchar_t *) ptr;
ptr = (char *) (__wcschr ((wchar_t *) ptr, L'\0') + 1);
}
}
}
data->era_initialized = 1;
}
out:
__libc_rwlock_unlock (__libc_setlocale_lock);
}
struct era_entry *
_nl_get_era_entry (const struct tm *tp, struct __locale_data *current)
{
if (current->private.time == NULL || !current->private.time->era_initialized)
_nl_init_era_entries (current);
if (current->private.time != NULL)
{
/* Now compare date with the available eras. */
const int32_t tdate[3] = { tp->tm_year, tp->tm_mon, tp->tm_mday };
size_t cnt;
for (cnt = 0; cnt < current->private.time->num_eras; ++cnt)
if ((ERA_DATE_CMP (current->private.time->eras[cnt].start_date, tdate)
&& ERA_DATE_CMP (tdate,
current->private.time->eras[cnt].stop_date))
|| (ERA_DATE_CMP (current->private.time->eras[cnt].stop_date,
tdate)
&& ERA_DATE_CMP (tdate,
current->private.time->eras[cnt].start_date)))
return ¤t->private.time->eras[cnt];
}
return NULL;
}
struct era_entry *
_nl_select_era_entry (int cnt, struct __locale_data *current)
{
if (current->private.time == NULL || !current->private.time->era_initialized)
_nl_init_era_entries (current);
return (current->private.time == NULL
? NULL : ¤t->private.time->eras[cnt]);
}
|
