| /* Return number of characters in multibyte representation for current |
| character set. |
| Copyright (C) 1996-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. |
| |
| 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 <langinfo.h> |
| #include <locale.h> |
| #include <stdlib.h> |
| #include "localeinfo.h" |
| |
| |
| /* This is a gross hack to get broken programs running. |
| |
| ISO C provides no mean to find out how many bytes the wide |
| character representation really uses. But it defines MB_CUR_LEN to |
| return the information for the multi-byte character representation. |
| Many programmers don't know the difference between the two and |
| think this means the same. But assuming all characters have a size |
| of MB_CUR_LEN after they have been processed by `mbrtowc' is wrong. |
| Instead the maximum number of characters used for the conversion is |
| MB_CUR_LEN. |
| |
| It is known that some Motif applications have this problem. To |
| cure this one has to make sure the glibc uses the function in this |
| file instead of the one in locale/mb_cur_max.c. This can either be |
| done by linking with this file or by using the LD_PRELOAD feature |
| of the dynamic linker. */ |
| size_t |
| __ctype_get_mb_cur_max (void) |
| { |
| union locale_data_value u; |
| |
| u.string = nl_langinfo (_NL_CTYPE_MB_CUR_MAX); |
| return ((size_t []) { 1, 1, 1, 2, 2, 3, 4 })[u.word]; |
| } |