Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/time/alt_digit.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
193 lines (151 sloc)
5.07 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Helper functions used by strftime/strptime to handle alternate digits. | |
Copyright (C) 1995-2016 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 * | |
internal_function | |
_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 * | |
internal_function | |
_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 | |
internal_function | |
_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; | |
} |