1 /*
2  * ngIRCd -- The Next Generation IRC Daemon
3  * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  * Please read the file COPYING, README and AUTHORS for more information.
10  *
11  * strlcpy() and strlcat() replacement functions.
12  * See <http://www.openbsd.org/papers/strlcpy-paper.ps> for details.
13  *
14  * Code partially borrowed from compat.c of rsync, written by Andrew
15  * Tridgell (1998) and Martin Pool (2002):
16  * <http://samba.anu.edu.au/rsync/doxygen/head/lib_2compat_8c.html>
17  */
18 
19 
20 #include "portab.h"
21 
22 static char UNUSED id[] = "$Id: strlcpy.c,v 1.3 2005/01/18 09:05:37 alex Exp $";
23 
24 #include "imp.h"
25 #include <string.h>
26 #include <sys/types.h>
27 
28 #include "exp.h"
29 
30 
31 #ifndef HAVE_STRLCAT
32 
33 GLOBAL size_t
34 strlcat( CHAR *dst, CONST CHAR *src, size_t size )
35 {
36 	/* Like strncat() but does not 0 fill the buffer and
37 	 * always null terminates. */
38 
39 	size_t len1 = strlen( dst );
40 	size_t len2 = strlen( src );
41 	size_t ret = len1 + len2;
42 	
43 	if( len1 + len2 >= size ) len2 = size - ( len1 + 1 );
44 	if( len2 > 0 )
45 	{
46 		memcpy( dst + len1, src, len2 );
47 		dst[len1 + len2] = 0;
48 	}
49 	return ret;
50 } /* strlcat */
51 
52 #endif
53 
54 
55 #ifndef HAVE_STRLCPY
56 
57 GLOBAL size_t
58 strlcpy( CHAR *dst, CONST CHAR *src, size_t size )
59 {
60 	/* Like strncpy but does not 0 fill the buffer and
61 	 * always null terminates. */
62 
63 	size_t len = strlen( src );
64 	size_t ret = len;
65 
66 	if( size <= 0 ) return 0;
67 	if( len >= size ) len = size - 1;
68 	memcpy( dst, src, len );
69 	dst[len] = 0;
70 	return ret;
71 } /* strlcpy */
72 
73 #endif
74 
75 
76 /* -eof- */