| /* Query the name of the current global locale. | |
| Copyright (C) 2019-2023 Free Software Foundation, Inc. | |
| This file 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. | |
| This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */ | |
| /* Written by Bruno Haible <[email protected]>, 2019. */ | |
| extern "C" { | |
| /* Recommended size of a buffer for a locale name for a single category. | |
| On glibc systems, you can have locale names that are relative file names; | |
| assume a maximum length 256. | |
| In native Windows, in 2018 the longest locale name was of length 58 | |
| ("FYRO Macedonian_Former Yugoslav Republic of Macedonia.1251"). */ | |
| /* Recommended size of a buffer for a locale name with all categories. | |
| On glibc systems, you can have locale names that are relative file names; | |
| assume maximum length 256 for each. There are 12 categories; so, the | |
| maximum total length is 148+12*256. | |
| In native Windows, there are 5 categories, and the maximum total length is | |
| 55+5*58. */ | |
| /* setlocale_null_r (CATEGORY, BUF, BUFSIZE) is like setlocale (CATEGORY, NULL), | |
| except that | |
| - it is guaranteed to be multithread-safe, | |
| - it returns the resulting locale category name or locale name in the | |
| user-supplied buffer BUF, which must be BUFSIZE bytes long. | |
| The recommended minimum buffer size is | |
| - SETLOCALE_NULL_MAX for CATEGORY != LC_ALL, and | |
| - SETLOCALE_NULL_ALL_MAX for CATEGORY == LC_ALL. | |
| The return value is an error code: 0 if the call is successful, EINVAL if | |
| CATEGORY is invalid, or ERANGE if BUFSIZE is smaller than the length needed | |
| size (including the trailing NUL byte). In the latter case, a truncated | |
| result is returned in BUF, but still NUL-terminated if BUFSIZE > 0. | |
| For this call to be multithread-safe, *all* calls to | |
| setlocale (CATEGORY, NULL) in all other threads must have been converted | |
| to use setlocale_null_r or setlocale_null as well, and the other threads | |
| must not make other setlocale invocations (since changing the global locale | |
| has side effects on all threads). */ | |
| extern int setlocale_null_r (int category, char *buf, size_t bufsize) | |
| _GL_ARG_NONNULL ((2)); | |
| /* setlocale_null (CATEGORY) is like setlocale (CATEGORY, NULL), except that | |
| it is guaranteed to be multithread-safe. | |
| The return value is NULL if CATEGORY is invalid. | |
| For this call to be multithread-safe, *all* calls to | |
| setlocale (CATEGORY, NULL) in all other threads must have been converted | |
| to use setlocale_null_r or setlocale_null as well, and the other threads | |
| must not make other setlocale invocations (since changing the global locale | |
| has side effects on all threads). */ | |
| extern const char *setlocale_null (int category); | |
| } | |