diff options
Diffstat (limited to 'REORG.TODO/time/alt_digit.c')
| -rw-r--r-- | REORG.TODO/time/alt_digit.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/REORG.TODO/time/alt_digit.c b/REORG.TODO/time/alt_digit.c new file mode 100644 index 0000000000..e3bcea4414 --- /dev/null +++ b/REORG.TODO/time/alt_digit.c @@ -0,0 +1,193 @@ +/* Helper functions used by strftime/strptime to handle alternate digits. + Copyright (C) 1995-2017 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; +} |