mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 10:22:41 +08:00
4a9dcff10e
* charmaps/ISO-IR-197: Remove alias "none". 2000-09-30 Bruno Haible <haible@clisp.cons.org>
40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
/* Internal header containing implementation of wcwidth() function.
|
|
Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <wchar.h>
|
|
#include <wctype.h>
|
|
#include "../wctype/wchar-lookup.h"
|
|
|
|
/* Table containing width information. */
|
|
extern const char *__ctype32_width;
|
|
|
|
static __inline int
|
|
internal_wcwidth (wint_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 (__ctype32_width, wc);
|
|
|
|
return res == (unsigned char) '\xff' ? -1 : (int) res;
|
|
}
|