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/*
FUNCTION
<<wcslcat>>---concatenate wide-character strings to specified length
ANSI_SYNOPSIS
#include <wchar.h>
size_t wcslcat(wchar_t *<[dst]>, const wchar_t *<[src]>, size_t <[siz]>);
TRAD_SYNOPSIS
#include <wchar.h>
size_t wcslcat(<[dst]>, <[src]>, <[siz]>
wchar_t *<[dst]>;
const wchar_t *<[src]>;
size_t <[siz]>;
DESCRIPTION
The <<wcslcat>> function appends wide-characters from <[src]> to
end of the <[dst]> wide-character string so that the resultant
wide-character string is not more than <[siz]> wide-characters
including terminating null wide-character code. A terminating
null wide-character is always added unless <[siz]> is 0. Thus,
the maximum number of wide-characters that can be appended from
<[src]> is <[siz]> - 1. If copying takes place between objects
that overlap, the behaviour is undefined.
RETURNS
Wide-character string length of initial <[dst]> plus the
wide-character string length of <[src]> (does not include
terminating null wide-characters). If the return value is
greater than or equal to <[siz]>, then truncation occurred and
not all wide-characters from <[src]> were appended.
PORTABILITY
No supporting OS subroutines are required.
*/
/* $NetBSD: wcslcat.c,v 1.1 2000/12/23 23:14:36 itojun Exp $ */
/* from OpenBSD: strlcat.c,v 1.3 2000/11/24 11:10:02 itojun Exp */
/*
* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 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) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT 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.
*/
#include <_ansi.h>
#include <wchar.h>
/*
* Appends src to string dst of size siz (unlike wcsncat, siz is the
* full size of dst, not space left). At most siz-1 characters
* will be copied. Always NUL terminates (unless siz == 0).
* Returns wcslen(initial dst) + wcslen(src); if retval >= siz,
* truncation occurred.
*/
size_t
_DEFUN (wcslcat, (dst, src, siz),
wchar_t * dst _AND
_CONST wchar_t * src _AND
size_t siz)
{
wchar_t *d = dst;
_CONST wchar_t *s = src;
size_t n = siz;
size_t dlen;
/* Find the end of dst and adjust bytes left but don't go past end */
while (*d != '\0' && n-- != 0)
d++;
dlen = d - dst;
n = siz - dlen;
if (n == 0)
return (dlen + wcslen (s));
while (*s != '\0')
{
if (n != 1)
{
*d++ = *s;
n--;
}
s++;
}
*d = '\0';
return (dlen + (s - src)); /* count does not include NUL */
}
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