1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                 Eclipse Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*          http://www.eclipse.org/org/documents/epl-v10.html           *
11*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
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 * Glenn Fowler
25 * AT&T Bell Laboratories
26 *
27 * single dir support for pathaccess()
28 */
29
30#define _AST_API_H	1
31
32#include <ast.h>
33
34/*
35 * building 3d flirts with the dark side
36 */
37
38#if _BLD_3d
39
40#undef	pathcat
41#define pathcat_20100601	_3d_pathcat
42
43#else
44
45char*
46pathcat(char* path, const char* dirs, int sep, const char* a, const char* b)
47{
48	return pathcat_20100601(dirs, sep, a, b, path, PATH_MAX);
49}
50
51#endif
52
53#undef	_AST_API
54
55#include <ast_api.h>
56
57char*
58pathcat_20100601(register const char* dirs, int sep, const char* a, register const char* b, char* path, size_t size)
59{
60	register char*	s;
61	register char*	e;
62
63	s = path;
64	e = path + size;
65	while (*dirs && *dirs != sep)
66	{
67		if (s >= e)
68			return 0;
69		*s++ = *dirs++;
70	}
71	if (s != path)
72	{
73		if (s >= e)
74			return 0;
75		*s++ = '/';
76	}
77	if (a)
78	{
79		while (*s = *a++)
80			if (++s >= e)
81				return 0;
82		if (b)
83		{
84			if (s >= e)
85				return 0;
86			*s++ = '/';
87		}
88	}
89	else if (!b)
90		b = ".";
91	if (b)
92		do
93		{
94			if (s >= e)
95				return 0;
96		} while (*s++ = *b++);
97	return *dirs ? (char*)++dirs : 0;
98}
99