pcsc-lite  1.8.8
strlcat.c
1 /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
2 
3 /*
4  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #ifdef HAVE_CONFIG_H
20 #include "config.h"
21 #endif
22 
23 #ifndef HAVE_STRLCPY
24 
25 #include <sys/types.h>
26 #include <string.h>
27 #include "strlcpycat.h"
28 
29 /*
30  * Appends src to string dst of size siz (unlike strncat, siz is the
31  * full size of dst, not space left). At most siz-1 characters
32  * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
33  * Returns strlen(src) + MIN(siz, strlen(initial dst)).
34  * If retval >= siz, truncation occurred.
35  */
36 size_t
37 strlcat(char *dst, const char *src, size_t siz)
38 {
39  char *d = dst;
40  const char *s = src;
41  size_t n = siz;
42  size_t dlen;
43 
44  /* Find the end of dst and adjust bytes left but don't go past end */
45  while (n-- != 0 && *d != '\0')
46  d++;
47  dlen = d - dst;
48  n = siz - dlen;
49 
50  if (n == 0)
51  return(dlen + strlen(s));
52  while (*s != '\0') {
53  if (n != 1) {
54  *d++ = *s;
55  n--;
56  }
57  s++;
58  }
59  *d = '\0';
60 
61  return(dlen + (s - src)); /* count does not include NUL */
62 }
63 #endif
prototypes of strlcpy()/strlcat() imported from OpenBSD