aboutsummaryrefslogtreecommitdiff
path: root/locale/lc-time.c
blob: 533e2e0d4c8ff1a846705294f21847cdfae398da (plain)
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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
/* Define current locale data for LC_TIME category.
   Copyright (C) 1995, 1996, 1997, 1998, 1999 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <bits/libc-lock.h>
#include <endian.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <wchar.h>
#include "localeinfo.h"

_NL_CURRENT_DEFINE (LC_TIME);

/* Some of the functions here must not be used while setlocale is called.  */
__libc_lock_define (extern, __libc_setlocale_lock)


static int era_initialized;
static struct era_entry **eras;
static size_t num_eras;


static int alt_digits_initialized;
static const char **alt_digits;


static int walt_digits_initialized;
static const wchar_t **walt_digits;


void
_nl_postload_time (void)
{
  /* Prepare lazy initialization of `era' and `alt_digits' array.  */
  era_initialized = 0;
  alt_digits_initialized = 0;
  walt_digits_initialized = 0;
}


struct era_entry *
_nl_get_era_entry (const struct tm *tp)
{
  struct era_entry *result;
  size_t cnt;

  __libc_lock_lock (__libc_setlocale_lock);

  if (era_initialized == 0)
    {
      size_t new_num_eras = _NL_CURRENT_WORD (LC_TIME,
					      _NL_TIME_ERA_NUM_ENTRIES);

      if (eras != NULL && new_num_eras == 0)
	{
	  free (eras);
	  eras = NULL;
	}
      else if (new_num_eras != 0)
	{
	  if (num_eras != new_num_eras)
	    eras = realloc (eras, new_num_eras * sizeof (struct era_entry *));

	  if (eras == NULL)
	    num_eras = 0;
	  else
	    {
	      const char *ptr = _NL_CURRENT (LC_TIME, _NL_TIME_ERA_ENTRIES);
	      num_eras = new_num_eras;

	      for (cnt = 0; cnt < num_eras; ++cnt)
		{
		  eras[cnt] = (struct era_entry *) ptr;

		  /* Skip numeric values.  */
		  ptr += sizeof (struct era_entry);
		  /* Skip era name.  */
		  ptr = strchr (ptr, '\0') + 1;
		  /* Skip era format.  */
		  ptr = strchr (ptr, '\0') + 1;

		  ptr += 3 - (((ptr - (const char *) eras[cnt]) + 3) & 3);

		  /* Skip wide era name.  */
		  ptr = (char *) wcschr ((wchar_t *) ptr, '\0');
		  /* Skip wide era format.  */
		  ptr = (char *) wcschr ((wchar_t *) ptr, '\0');
		}
	    }
	}

      era_initialized = 1;
    }

  /* Now compare date with the available eras.  */
  for (cnt = 0; cnt < num_eras; ++cnt)
    if ((eras[cnt]->start_date[0] < tp->tm_year
	 || (eras[cnt]->start_date[0] == tp->tm_year
	     && (eras[cnt]->start_date[1] < tp->tm_mon
		 || (eras[cnt]->start_date[1] == tp->tm_mon
		     && eras[cnt]->start_date[2] <= tp->tm_mday))))
	&& (eras[cnt]->stop_date[0] > tp->tm_year
	    || (eras[cnt]->stop_date[0] == tp->tm_year
		&& (eras[cnt]->stop_date[1] > tp->tm_mon
		    || (eras[cnt]->stop_date[1] == tp->tm_mon
			&& eras[cnt]->stop_date[2] >= tp->tm_mday)))))
      break;

  result = cnt < num_eras ? eras[cnt] : NULL;

  __libc_lock_unlock (__libc_setlocale_lock);

  return result;
}


const char *
_nl_get_alt_digit (unsigned int number)
{
  const char *result;

  __libc_lock_lock (__libc_setlocale_lock);

  if (alt_digits_initialized == 0)
    {
      alt_digits_initialized = 1;

      if (alt_digits == NULL)
	alt_digits = malloc (100 * sizeof (const char *));

      if (alt_digits != NULL)
	{
	  const char *ptr = _NL_CURRENT (LC_TIME, ALT_DIGITS);
	  size_t cnt;

	  if (alt_digits != NULL)
	    for (cnt = 0; cnt < 100; ++cnt)
	      {
		alt_digits[cnt] = ptr;

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

  result = alt_digits != NULL && number < 100 ? alt_digits[number] : NULL;

  __libc_lock_unlock (__libc_setlocale_lock);

  return result;
}


const wchar_t *
_nl_get_walt_digit (unsigned int number)
{
  const wchar_t *result;

  __libc_lock_lock (__libc_setlocale_lock);

  if (walt_digits_initialized == 0)
    {
      walt_digits_initialized = 1;

      if (walt_digits == NULL)
	walt_digits = malloc (100 * sizeof (const uint32_t *));

      if (walt_digits != NULL)
	{
	  const wchar_t *ptr = _NL_CURRENT_WSTR (LC_TIME, _NL_WALT_DIGITS);
	  size_t cnt;

	  for (cnt = 0; cnt < 100; ++cnt)
	    {
	      walt_digits[cnt] = ptr;

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

  result = walt_digits != NULL && number < 100 ? walt_digits[number] : NULL;

  __libc_lock_unlock (__libc_setlocale_lock);

  return (wchar_t *) result;
}