90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/*
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FUNCTION
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<<wcsncpy>>---copy part of a wide-character string
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ANSI_SYNOPSIS
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#include <wchar.h>
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wchar_t *wcsncpy(wchar_t *<[s1]>, const wchar_t *<[s2]>, size_t <[n]>);
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TRAD_SYNOPSIS
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wchar_t *wcsncpy(<[s1]>, <[s2]>, <[n]>
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wchar_t *<[s1]>;
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const wchar_t *<[s2]>;
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size_t <[n]>;
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DESCRIPTION
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The <<wcsncpy>> function copies not more than n wide-character codes
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(wide-character codes that follow a null wide-character code are not
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copied) from the array pointed to by <[s2]> to the array pointed to
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by <[s1]>. If copying takes place between objects that overlap, the
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behaviour is undefined.
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If the array pointed to by <[s2]> is a wide-character string that is
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shorter than <[n]> wide-character codes, null wide-character codes are
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appended to the copy in the array pointed to by <[s1]>, until <[n]>
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wide-character codes in all are written.
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RETURNS
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The <<wcsncpy>> function returns <[s1]>; no return value is reserved to
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indicate an error.
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PORTABILITY
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<<wcsncpy>> is ISO/IEC 9899/AMD1:1995 (ISO C).
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No supporting OS subroutines are required.
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*/
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/* $NetBSD: wcsncpy.c,v 1.1 2000/12/23 23:14:36 itojun Exp $ */
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/*-
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* Copyright (c)1999 Citrus Project,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* citrus Id: wcsncpy.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
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*/
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#include <_ansi.h>
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#include <wchar.h>
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wchar_t *
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_DEFUN (wcsncpy, (s1, s2, n),
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wchar_t * s1 _AND
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_CONST wchar_t * s2 _AND
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size_t n)
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{
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wchar_t *p;
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_CONST wchar_t *q;
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*s1 = '\0';
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p = s1;
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q = s2;
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while (n && *q)
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{
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*p++ = *q++;
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n--;
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}
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*p = '\0';
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return s1;
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}
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