diff options
Diffstat (limited to 'newlib/libc/string/wcsncpy.c')
| -rw-r--r-- | newlib/libc/string/wcsncpy.c | 52 |
1 files changed, 42 insertions, 10 deletions
diff --git a/newlib/libc/string/wcsncpy.c b/newlib/libc/string/wcsncpy.c index 533b0ce53..b53e9c332 100644 --- a/newlib/libc/string/wcsncpy.c +++ b/newlib/libc/string/wcsncpy.c @@ -13,13 +13,11 @@ TRAD_SYNOPSIS size_t <[n]>; DESCRIPTION - The <<wcsncpy>> function copies not more than <[n]> wide-character codes + The <<wcsncpy>> function copies not more than n wide-character codes (wide-character codes that follow a null wide-character code are not copied) from the array pointed to by <[s2]> to the array pointed to by <[s1]>. If copying takes place between objects that overlap, the - behaviour is undefined. Note that if <[s1]> contains more than <[n]> - wide characters before its terminating null, the result is not - null-terminated. + behaviour is undefined. If the array pointed to by <[s2]> is a wide-character string that is shorter than <[n]> wide-character codes, null wide-character codes are @@ -31,11 +29,41 @@ RETURNS indicate an error. PORTABILITY -ISO/IEC 9899; POSIX.1. +<<wcsncpy>> is ISO/IEC 9899/AMD1:1995 (ISO C). No supporting OS subroutines are required. */ +/* $NetBSD: wcsncpy.c,v 1.1 2000/12/23 23:14:36 itojun Exp $ */ + +/*- + * Copyright (c)1999 Citrus Project, + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 + * 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. + * + * citrus Id: wcsncpy.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp + */ + #include <_ansi.h> #include <wchar.h> @@ -45,14 +73,18 @@ _DEFUN (wcsncpy, (s1, s2, n), _CONST wchar_t * s2 _AND size_t n) { - wchar_t *dscan=s1; + wchar_t *p; + _CONST wchar_t *q; - while(n > 0) + *s1 = '\0'; + p = s1; + q = s2; + while (n && *q) { - --n; - if((*dscan++ = *s2++) == L'\0') break; + *p++ = *q++; + n--; } - while(n-- > 0) *dscan++ = L'\0'; + *p = '\0'; return s1; } |