82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
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/* $NetBSD: strlcpy.c,v 1.3 2007/06/04 18:19:27 christos Exp $ */
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/* $OpenBSD: strlcpy.c,v 1.7 2003/04/12 21:56:39 millert Exp $ */
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/*
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* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
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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 TODD C. MILLER DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
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* FOR 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 ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#if !defined(_KERNEL) && !defined(_STANDALONE)
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: strlcpy.c,v 1.3 2007/06/04 18:19:27 christos Exp $");
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#endif /* LIBC_SCCS and not lint */
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#ifdef _LIBC
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#include "namespace.h"
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#endif
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#include <sys/types.h>
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#include <assert.h>
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#include <string.h>
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#ifdef _LIBC
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# ifdef __weak_alias
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__weak_alias(strlcpy, _strlcpy)
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# endif
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#endif
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#else
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#include <lib/libkern/libkern.h>
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#endif /* !_KERNEL && !_STANDALONE */
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#if !HAVE_STRLCPY
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/*
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* Copy src to string dst of size siz. At most siz-1 characters
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* will be copied. Always NUL terminates (unless siz == 0).
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* Returns strlen(src); if retval >= siz, truncation occurred.
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*/
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size_t
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strlcpy(char *dst, const char *src, size_t siz)
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{
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char *d = dst;
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const char *s = src;
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size_t n = siz;
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_DIAGASSERT(dst != NULL);
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_DIAGASSERT(src != NULL);
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/* Copy as many bytes as will fit */
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if (n != 0 && --n != 0) {
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do {
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if ((*d++ = *s++) == 0)
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break;
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} while (--n != 0);
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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 (n == 0) {
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if (siz != 0)
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*d = '\0'; /* NUL-terminate dst */
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while (*s++)
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;
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}
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return(s - src - 1); /* count does not include NUL */
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}
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#endif
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