strlcat.c - vx32 - Local 9vx git repository for patches.
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       ---
       strlcat.c (2386B)
       ---
            1 /*        $OpenBSD: strlcat.c,v 1.2 1999/06/17 16:28:58 millert 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 #include <sys/types.h>
           31 #include <string.h>
           32 
           33 /*
           34  * Appends src to string dst of size siz (unlike strncat, siz is the
           35  * full size of dst, not space left).  At most siz-1 characters
           36  * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
           37  * Returns strlen(src) + MIN(siz, strlen(initial dst)).
           38  * If retval >= siz, truncation occurred.
           39  */
           40 size_t
           41 strlcat(dst, src, siz)
           42         char *dst;
           43         const char *src;
           44         size_t siz;
           45 {
           46         char *d = dst;
           47         const char *s = src;
           48         size_t n = siz;
           49         size_t dlen;
           50 
           51         /* Find the end of dst and adjust bytes left but don't go past end */
           52         while (n-- != 0 && *d != '\0')
           53                 d++;
           54         dlen = d - dst;
           55         n = siz - dlen;
           56 
           57         if (n == 0)
           58                 return(dlen + strlen(s));
           59         while (*s != '\0') {
           60                 if (n != 1) {
           61                         *d++ = *s;
           62                         n--;
           63                 }
           64                 s++;
           65         }
           66         *d = '\0';
           67 
           68         return(dlen + (s - src));        /* count does not include NUL */
           69 }