1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2010 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23/*
24 * strlcat implementation
25 */
26
27#define strlcat		______strlcat
28
29#include <ast.h>
30
31#undef	strlcat
32
33#undef	_def_map_ast
34#include <ast_map.h>
35
36#if _lib_strlcat
37
38NoN(strlcat)
39
40#else
41
42/*
43 * append t onto s limiting total size of s to n
44 * s 0 terminated if n>0
45 * min(n,strlen(s))+strlen(t) returned
46 */
47
48#if defined(__EXPORT__)
49#define extern	__EXPORT__
50#endif
51
52extern size_t
53strlcat(register char* s, register const char* t, register size_t n)
54{
55	register size_t	m;
56	const char*	o = t;
57
58	if (m = n)
59	{
60		while (n && *s)
61		{
62			n--;
63			s++;
64		}
65		m -= n;
66		if (n)
67			do
68			{
69				if (!--n)
70				{
71					*s = 0;
72					break;
73				}
74			} while (*s++ = *t++);
75		else
76			*s = 0;
77	}
78	if (!n)
79		while (*t++);
80	return (t - o) + m - 1;
81}
82
83#endif
84