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91e32540c4
2008-04-11 Jakub Jelinek <jakub@redhat.com> [BZ #5443] * time/era.c: Transform __libc_setlocale_lock into rwlock. * time/alt_digit.c: Likewise. * wcsmbs/wcsmbsload.c: Likewise.
178 lines
5.3 KiB
C
178 lines
5.3 KiB
C
/* Helper functions used by strftime/strptime to handle locale-specific "eras".
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Copyright (C) 1995-2002, 2008 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include "../locale/localeinfo.h"
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#include <bits/libc-lock.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include <string.h>
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/* Some of the functions here must not be used while setlocale is called. */
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__libc_rwlock_define (extern, __libc_setlocale_lock attribute_hidden)
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#define CURRENT(item) (current->values[_NL_ITEM_INDEX (item)].string)
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#define CURRENT_WORD(item) (current->values[_NL_ITEM_INDEX (item)].word)
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#define ERA_DATE_CMP(a, b) \
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(a[0] < b[0] || (a[0] == b[0] && (a[1] < b[1] \
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|| (a[1] == b[1] && a[2] <= b[2]))))
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/* Look up the era information in CURRENT's locale strings and
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cache it in CURRENT->private. */
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static void internal_function
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_nl_init_era_entries (struct locale_data *current)
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{
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size_t cnt;
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struct lc_time_data *data;
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/* Avoid touching CURRENT if there is no data at all, for _nl_C_LC_TIME. */
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if (CURRENT_WORD (_NL_TIME_ERA_NUM_ENTRIES) == 0)
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return;
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__libc_rwlock_wrlock (__libc_setlocale_lock);
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if (current->private.time == NULL)
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{
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current->private.time = malloc (sizeof *current->private.time);
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if (current->private.time == NULL)
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goto out;
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memset (current->private.time, 0, sizeof *current->private.time);
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current->private.cleanup = &_nl_cleanup_time;
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}
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data = current->private.time;
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if (! data->era_initialized)
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{
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size_t new_num_eras = CURRENT_WORD (_NL_TIME_ERA_NUM_ENTRIES);
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if (new_num_eras == 0)
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{
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if (data->eras != NULL)
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{
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free (data->eras);
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data->eras = NULL;
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}
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}
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else
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{
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struct era_entry *new_eras = data->eras;
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if (data->num_eras != new_num_eras)
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new_eras =
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(struct era_entry *) realloc (data->eras,
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new_num_eras
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* sizeof (struct era_entry));
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if (new_eras == NULL)
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{
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free (data->eras);
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data->num_eras = 0;
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data->eras = NULL;
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}
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else
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{
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const char *ptr = CURRENT (_NL_TIME_ERA_ENTRIES);
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data->num_eras = new_num_eras;
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data->eras = new_eras;
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for (cnt = 0; cnt < new_num_eras; ++cnt)
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{
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const char *base_ptr = ptr;
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memcpy ((void *) (new_eras + cnt), (const void *) ptr,
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sizeof (uint32_t) * 8);
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if (ERA_DATE_CMP(new_eras[cnt].start_date,
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new_eras[cnt].stop_date))
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if (new_eras[cnt].direction == (uint32_t) '+')
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new_eras[cnt].absolute_direction = 1;
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else
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new_eras[cnt].absolute_direction = -1;
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else
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if (new_eras[cnt].direction == (uint32_t) '+')
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new_eras[cnt].absolute_direction = -1;
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else
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new_eras[cnt].absolute_direction = 1;
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/* Skip numeric values. */
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ptr += sizeof (uint32_t) * 8;
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/* Set and skip era name. */
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new_eras[cnt].era_name = ptr;
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ptr = strchr (ptr, '\0') + 1;
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/* Set and skip era format. */
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new_eras[cnt].era_format = ptr;
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ptr = strchr (ptr, '\0') + 1;
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ptr += 3 - (((ptr - (const char *) base_ptr) + 3) & 3);
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/* Set and skip wide era name. */
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new_eras[cnt].era_wname = (wchar_t *) ptr;
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ptr = (char *) (wcschr ((wchar_t *) ptr, L'\0') + 1);
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/* Set and skip wide era format. */
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new_eras[cnt].era_wformat = (wchar_t *) ptr;
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ptr = (char *) (wcschr ((wchar_t *) ptr, L'\0') + 1);
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}
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}
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}
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data->era_initialized = 1;
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}
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out:
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__libc_rwlock_unlock (__libc_setlocale_lock);
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}
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struct era_entry *
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internal_function
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_nl_get_era_entry (const struct tm *tp, struct locale_data *current)
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{
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if (current->private.time == NULL || !current->private.time->era_initialized)
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_nl_init_era_entries (current);
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if (current->private.time != NULL)
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{
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/* Now compare date with the available eras. */
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const int32_t tdate[3] = { tp->tm_year, tp->tm_mon, tp->tm_mday };
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size_t cnt;
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for (cnt = 0; cnt < current->private.time->num_eras; ++cnt)
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if ((ERA_DATE_CMP (current->private.time->eras[cnt].start_date, tdate)
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&& ERA_DATE_CMP (tdate,
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current->private.time->eras[cnt].stop_date))
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|| (ERA_DATE_CMP (current->private.time->eras[cnt].stop_date,
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tdate)
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&& ERA_DATE_CMP (tdate,
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current->private.time->eras[cnt].start_date)))
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return ¤t->private.time->eras[cnt];
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}
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return NULL;
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}
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struct era_entry *
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internal_function
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_nl_select_era_entry (int cnt, struct locale_data *current)
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{
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if (current->private.time == NULL || !current->private.time->era_initialized)
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_nl_init_era_entries (current);
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return (current->private.time == NULL
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? NULL : ¤t->private.time->eras[cnt]);
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}
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