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: }
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