glibc/wcsmbs/wcwidth.h
Ulrich Drepper 0e16ecfa1e Update.
* locale/programs/ld-ctype.c (ctype_finish): Take all characters from
	the input charset into account when generating the hash table.
	(allocate_arrays): Correct setting default width.  Not all empty slots
	in the table are filled, only those not covert explicitly by the
	locale description and in the charset.

	* stdio-common/vfscanf.c: Make sure to always return WEOF and EOF for
	wide character version.
	For %C handling, test correct pointer variable for NULL.

	* wcsmbs/wctob.c: Handle WEOF special.

	* wcsmbs/wcwidth.h: 0xff in width array means invalid character.

	* wctype/wctype.h: Protect gcc-isms with __extension__.  Avoid
	always-true test to avoid warning.
2000-06-28 04:27:24 +00:00

48 lines
1.6 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/cname-lookup.h"
/* Array containing width information. */
extern unsigned char *__ctype_width;
/* If the program is compiled without optimization the following declaration
is not visible in the header. */
extern unsigned int *__ctype32_b;
static __inline int
internal_wcwidth (wint_t ch)
{
size_t idx;
unsigned char res;
if (ch == L'\0')
return 0;
idx = cname_lookup (ch);
if (idx == ~((size_t) 0) || (__ctype32_b[idx] & _ISwprint) == 0)
return -1;
res = __ctype_width[idx];
return res == (unsigned char) '\xff' ? -1 : (int) res;
}