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libevent

    1: /*	$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $	*/
    2: 
    3: /*
    4:  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
    5:  * All rights reserved.
    6:  *
    7:  * Redistribution and use in source and binary forms, with or without
    8:  * modification, are permitted provided that the following conditions
    9:  * are met:
   10:  * 1. Redistributions of source code must retain the above copyright
   11:  *    notice, this list of conditions and the following disclaimer.
   12:  * 2. Redistributions in binary form must reproduce the above copyright
   13:  *    notice, this list of conditions and the following disclaimer in the
   14:  *    documentation and/or other materials provided with the distribution.
   15:  * 3. The name of the author may not be used to endorse or promote products
   16:  *    derived from this software without specific prior written permission.
   17:  *
   18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
   19:  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
   20:  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
   21:  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   22:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   23:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   24:  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   25:  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   26:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   27:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   28:  */
   29: 
   30: #if defined(LIBC_SCCS) && !defined(lint)
   31: static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $";
   32: #endif /* LIBC_SCCS and not lint */
   33: 
   34: #include <sys/types.h>
   35: 
   36: #ifdef HAVE_CONFIG_H
   37: #include "config.h"
   38: #endif /* HAVE_CONFIG_H */
   39: 
   40: #ifndef HAVE_STRLCPY
   41: #include "strlcpy-internal.h"
   42: 
   43: /*
   44:  * Copy src to string dst of size siz.  At most siz-1 characters
   45:  * will be copied.  Always NUL terminates (unless siz == 0).
   46:  * Returns strlen(src); if retval >= siz, truncation occurred.
   47:  */
   48: size_t
   49: _event_strlcpy(dst, src, siz)
   50: 	char *dst;
   51: 	const char *src;
   52: 	size_t siz;
   53: {
   54: 	register char *d = dst;
   55: 	register const char *s = src;
   56: 	register size_t n = siz;
   57: 
   58: 	/* Copy as many bytes as will fit */
   59: 	if (n != 0 && --n != 0) {
   60: 		do {
   61: 			if ((*d++ = *s++) == 0)
   62: 				break;
   63: 		} while (--n != 0);
   64: 	}
   65: 
   66: 	/* Not enough room in dst, add NUL and traverse rest of src */
   67: 	if (n == 0) {
   68: 		if (siz != 0)
   69: 			*d = '\0';		/* NUL-terminate dst */
   70: 		while (*s++)
   71: 			;
   72: 	}
   73: 
   74: 	return(s - src - 1);	/* count does not include NUL */
   75: }
   76: #endif