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Move just committed version of wcswidth.c here (from "locale"),

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a bit optimized now.
This commit is contained in:
Andrey A. Chernov 2002-08-20 02:06:28 +00:00
parent c1a0a78d00
commit 353450fbbe
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=102159
2 changed files with 31 additions and 25 deletions
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2
lib/libc/string/Makefile.inc
View File

@ -14,7 +14,7 @@ MISRCS+=bcmp.c bcopy.c bzero.c ffs.c index.c memccpy.c memchr.c memcmp.c \
strpbrk.c strrchr.c strsep.c strsignal.c strspn.c strstr.c strtok.c \
strxfrm.c swab.c wcscat.c wcschr.c wcscmp.c wcscpy.c wcscspn.c \
wcslcat.c wcslcpy.c wcslen.c wcsncat.c wcsncmp.c wcsncpy.c wcspbrk.c \
wcsrchr.c wcsspn.c wcsstr.c wmemchr.c wmemcmp.c wmemcpy.c \
wcsrchr.c wcsspn.c wcsstr.c wcswidth.c wmemchr.c wmemcmp.c wmemcpy.c \
wmemmove.c wmemset.c

54
lib/libc/string/wcswidth.c
View File

@ -1,6 +1,14 @@
/*-
* Copyright (c)1999 Citrus Project,
* All rights reserved.
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* This code is derived from software contributed to Berkeley by
* Paul Borman at Krystal Technologies.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -10,11 +18,18 @@
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
@ -22,34 +37,25 @@
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* citrus Id: wcswidth.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
*/
#include <sys/cdefs.h>
#if 0
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: wcswidth.c,v 1.1 2000/12/23 23:14:37 itojun Exp $");
#endif /* LIBC_SCCS and not lint */
#endif
__FBSDID("$FreeBSD$");
#include <assert.h>
#include <wchar.h>
int
wcswidth(s, n)
const wchar_t *s;
size_t n;
wcswidth(const wchar_t *pwcs, size_t n)
{
int w;
wchar_t wc;
int len, l;
w = 0;
while (n && *s) {
w += wcwidth(*s);
s++;
n--;
len = 0;
while (n-- > 0 && (wc = *pwcs++) != L'\0') {
if ((l = wcwidth(wc)) < 0)
return (-1);
len += l;
}
return w;
return (len);
}