summary refs log tree commit diff
path: root/time/alt_digit.c
blob: 4485b80aa91d29fa312e556244bcfa11a6896ad8 (plain) (blame)
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
183
184
185
186
187
188
189
190
/* Helper functions used by strftime/strptime to handle alternate digits.
   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_WSTR(item) \
  ((wchar_t *) current->values[_NL_ITEM_INDEX (item)].wstr)

static void
_nl_init_alt_digit (struct __locale_data *current)
{
  struct lc_time_data *data;

  if (current->private.time == NULL)
    {
      current->private.time = malloc (sizeof *current->private.time);
      if (current->private.time == NULL)
	return;
      memset (current->private.time, 0, sizeof *current->private.time);
      current->private.cleanup = &_nl_cleanup_time;
    }
  data = current->private.time;

  if (! data->alt_digits_initialized)
    {
      const char *ptr = CURRENT (ALT_DIGITS);
      size_t cnt;

      data->alt_digits_initialized = 1;

      if (ptr != NULL)
	{
	  data->alt_digits = malloc (100 * sizeof (const char *));
	  if (data->alt_digits != NULL)
	    for (cnt = 0; cnt < 100; ++cnt)
	      {
		data->alt_digits[cnt] = ptr;

		/* Skip digit format. */
		ptr = strchr (ptr, '\0') + 1;
	      }
	}
    }

}

const char *
_nl_get_alt_digit (unsigned int number, struct __locale_data *current)
{
  const char *result;

  if (number >= 100 || CURRENT (ALT_DIGITS)[0] == '\0')
    return NULL;

  __libc_rwlock_wrlock (__libc_setlocale_lock);

  if (current->private.time == NULL
      || ! current->private.time->alt_digits_initialized)
    _nl_init_alt_digit (current);

  result = ((current->private.time != NULL
	     && current->private.time->alt_digits != NULL)
	    ? current->private.time->alt_digits[number]
	    : NULL);

  __libc_rwlock_unlock (__libc_setlocale_lock);

  return result;
}


const wchar_t *
_nl_get_walt_digit (unsigned int number, struct __locale_data *current)
{
  const wchar_t *result = NULL;
  struct lc_time_data *data;

  if (number >= 100 || CURRENT_WSTR (_NL_WALT_DIGITS)[0] == L'\0')
    return NULL;

  __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->walt_digits_initialized)
    {
      const wchar_t *ptr = CURRENT_WSTR (_NL_WALT_DIGITS);
      size_t cnt;

      data->walt_digits_initialized = 1;

      if (ptr != NULL)
	{
	  data->walt_digits = malloc (100 * sizeof (const uint32_t *));
	  if (data->walt_digits != NULL)
	    for (cnt = 0; cnt < 100; ++cnt)
	      {
		data->walt_digits[cnt] = ptr;

		/* Skip digit format. */
		ptr = __wcschr (ptr, L'\0') + 1;
	      }
	}
    }

  if (data->walt_digits != NULL)
    result = data->walt_digits[number];

 out:
  __libc_rwlock_unlock (__libc_setlocale_lock);

  return (wchar_t *) result;
}


int
_nl_parse_alt_digit (const char **strp, struct __locale_data *current)
{
  const char *str = *strp;
  int result = -1;
  size_t cnt;
  size_t maxlen = 0;

  if (CURRENT_WSTR (_NL_WALT_DIGITS)[0] == L'\0')
    return result;

  __libc_rwlock_wrlock (__libc_setlocale_lock);

  if (current->private.time == NULL
      || ! current->private.time->alt_digits_initialized)
    _nl_init_alt_digit (current);

  if (current->private.time != NULL &&
      current->private.time->alt_digits != NULL)
    /* Matching is not unambiguous.  The alternative digits could be like
       I, II, III, ... and the first one is a substring of the second
       and third.  Therefore we must keep on searching until we found
       the longest possible match.  Note that this is not specified in
       the standard.  */
    for (cnt = 0; cnt < 100; ++cnt)
      {
	const char *const dig = current->private.time->alt_digits[cnt];
	size_t len = strlen (dig);

	if (len > maxlen && strncmp (dig, str, len) == 0)
	  {
	    maxlen = len;
	    result = (int) cnt;
	  }
      }

  __libc_rwlock_unlock (__libc_setlocale_lock);

  if (result != -1)
    *strp += maxlen;

  return result;
}