mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 14:50:05 +00:00
39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/* Internal header containing implementation of wcwidth() function.
|
|
Copyright (C) 1996-2024 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;
|
|
}
|