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wcsmbs/wcwidth.h
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Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Internal header containing implementation of wcwidth() function. Copyright (C) 1996-2026 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 <https://www.gnu.org/licenses/>. */ #include <wchar.h> #include <wctype.h> #include "../wctype/wchar-lookup.h" #include "../locale/localeinfo.h" /* Table containing width information. */ extern const char *__ctype32_width attribute_hidden; static __inline int internal_wcwidth (wchar_t wc) { unsigned char res; /* The tables have been prepared in such a way that 1. wc == L'\0' yields res = 0, 2. !iswprint (wc) implies res = '\xff'. */ res = wcwidth_table_lookup (_NL_CURRENT (LC_CTYPE, _NL_CTYPE_WIDTH), wc); return res == (unsigned char) '\xff' ? -1 : (int) res; }