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