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Annotation of dgamelaunch-openbsd/strlcat.c, Revision 1.1.1.1

1.1       rubenllo    1: /*     $OpenBSD: strlcat.c,v 1.8 2001/05/13 15:40:15 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 =
                     32:   "$OpenBSD: strlcat.c,v 1.8 2001/05/13 15:40:15 deraadt Exp $";
                     33: #endif /* LIBC_SCCS and not lint */
                     34:
                     35: #include <sys/types.h>
                     36: #include <string.h>
                     37:
                     38: /*
                     39:  * Appends src to string dst of size siz (unlike strncat, siz is the
                     40:  * full size of dst, not space left).  At most siz-1 characters
                     41:  * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
                     42:  * Returns strlen(src) + MIN(siz, strlen(initial dst)).
                     43:  * If retval >= siz, truncation occurred.
                     44:  */
                     45: size_t
                     46: strlcat (dst, src, siz)
                     47:      char *dst;
                     48:      const char *src;
                     49:      size_t siz;
                     50: {
                     51:   register char *d = dst;
                     52:   register const char *s = src;
                     53:   register size_t n = siz;
                     54:   size_t dlen;
                     55:
                     56:   /* Find the end of dst and adjust bytes left but don't go past end */
                     57:   while (n-- != 0 && *d != '\0')
                     58:     d++;
                     59:   dlen = d - dst;
                     60:   n = siz - dlen;
                     61:
                     62:   if (n == 0)
                     63:     return (dlen + strlen (s));
                     64:   while (*s != '\0')
                     65:     {
                     66:       if (n != 1)
                     67:         {
                     68:           *d++ = *s;
                     69:           n--;
                     70:         }
                     71:       s++;
                     72:     }
                     73:   *d = '\0';
                     74:
                     75:   return (dlen + (s - src));    /* count does not include NUL */
                     76: }