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88 lines
3.2 KiB
C
88 lines
3.2 KiB
C
/*
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+----------------------------------------------------------------------+
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| Copyright © The PHP Group and Contributors. |
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+----------------------------------------------------------------------+
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| This source file is subject to the Modified BSD License that is |
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| bundled with this package in the file LICENSE, and is available |
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| through the World Wide Web at <https://www.php.net/license/>. |
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| SPDX-License-Identifier: BSD-3-Clause |
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+----------------------------------------------------------------------+
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*/
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#include "php.h"
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#ifdef USE_STRLCAT_PHP_IMPL
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/* $OpenBSD: strlcat.c,v 1.18 2016/10/16 17:37:39 dtucker Exp $ */
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/*
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* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static const char *rcsid = "$OpenBSD: strlcat.c,v 1.17 2016/10/14 18:19:04 dtucker Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <string.h>
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/*
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* Appends src to string dst of size siz (unlike strncat, siz is the
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* full size of dst, not space left). At most siz-1 characters
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* will be copied. Always NUL terminates (unless siz <= strlen(dst)).
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* Returns strlen(src) + MIN(siz, strlen(initial dst).
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* If retval >= siz, truncation occurred.
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*/
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PHPAPI size_t php_strlcat(char *dst, const char *src, size_t siz)
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{
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const char *d = dst;
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const char *s = src;
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size_t n = siz;
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size_t dlen;
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/* Find the end of dst and adjust bytes left but don't go past end */
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while (n-- != 0 && *dst != '\0')
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dst++;
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dlen = dst - d;
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n = siz - dlen;
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if (n-- == 0)
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return(dlen + strlen(src));
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while (*src != '\0') {
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if (n != 0) {
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*dst++ = *src;
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n--;
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}
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src++;
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}
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*dst = '\0';
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return(dlen + (src - s));
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}
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#endif /* !HAVE_STRLCAT */
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