xref: /freebsd/crypto/heimdal/lib/roken/strlcpy.c (revision 02e9120893770924227138ba49df1edb3896112a)
1 /*
2  * Copyright (c) 1995-2002 Kungliga Tekniska Högskolan
3  * (Royal Institute of Technology, Stockholm, Sweden).
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * 3. Neither the name of the Institute nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 #include <config.h>
35 #include "roken.h"
36 
37 #ifndef HAVE_STRLCPY
38 
39 #if defined(_MSC_VER) && _MSC_VER >= 1400
40 
41 ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL
42 strlcpy (char *dst, const char *src, size_t dst_cch)
43 {
44     errno_t e;
45 
46     if (dst_cch > 0)
47         e = strncpy_s(dst, dst_cch, src, _TRUNCATE);
48 
49     return strlen (src);
50 }
51 
52 #else
53 
54 ROKEN_LIB_FUNCTION size_t ROKEN_LIB_CALL
55 strlcpy (char *dst, const char *src, size_t dst_sz)
56 {
57     size_t n;
58 
59     for (n = 0; n < dst_sz; n++) {
60 	if ((*dst++ = *src++) == '\0')
61 	    break;
62     }
63 
64     if (n < dst_sz)
65 	return n;
66     if (n > 0)
67 	*(dst - 1) = '\0';
68     return n + strlen (src);
69 }
70 
71 #endif
72 
73 #endif
74