78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*
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FUNCTION
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<<wcslcpy>>---copy a wide-character string to specified length
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SYNOPSIS
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#include <wchar.h>
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size_t wcslcpy(wchar_t *<[dst]>, const wchar_t *<[src]>, size_t <[siz]>);
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DESCRIPTION
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<<wcslcpy>> copies wide characters from <[src]> to <[dst]>
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such that up to <[siz]> - 1 characters are copied. A
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terminating null is appended to the result, unless <[siz]>
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is zero.
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RETURNS
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<<wcslcpy>> returns the number of wide characters in <[src]>,
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not including the terminating null wide character. If the
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return value is greater than or equal to <[siz]>, then
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not all wide characters were copied from <[src]> and truncation
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occurred.
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PORTABILITY
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No supporting OS subroutines are required.
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*/
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/* $OpenBSD: wcslcpy.c,v 1.8 2019/01/25 00:19:25 millert Exp $ */
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/*
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* Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <wchar.h>
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/*
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* Copy string src to buffer dst of size dsize. At most dsize-1
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* chars will be copied. Always NUL terminates (unless dsize == 0).
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* Returns wcslen(src); if retval >= dsize, truncation occurred.
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*/
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size_t
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wcslcpy (wchar_t *dst,
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const wchar_t *src,
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size_t dsize)
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{
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const wchar_t *osrc = src;
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size_t nleft = dsize;
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/* Copy as many bytes as will fit. */
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if (nleft != 0) {
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while (--nleft != 0) {
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if ((*dst++ = *src++) == L'\0')
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break;
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}
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}
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/* Not enough room in dst, add NUL and traverse rest of src. */
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if (nleft == 0) {
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if (dsize != 0)
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*dst = L'\0'; /* NUL-terminate dst */
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while (*src++)
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;
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}
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return(src - osrc - 1); /* count does not include NUL */
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}
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