1*4887Schin /***********************************************************************
2*4887Schin *                                                                      *
3*4887Schin *               This software is part of the ast package               *
4*4887Schin *           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
5*4887Schin *                      and is licensed under the                       *
6*4887Schin *                  Common Public License, Version 1.0                  *
7*4887Schin *                      by AT&T Knowledge Ventures                      *
8*4887Schin *                                                                      *
9*4887Schin *                A copy of the License is available at                 *
10*4887Schin *            http://www.opensource.org/licenses/cpl1.0.txt             *
11*4887Schin *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*4887Schin *                                                                      *
13*4887Schin *              Information and Software Systems Research               *
14*4887Schin *                            AT&T Research                             *
15*4887Schin *                           Florham Park NJ                            *
16*4887Schin *                                                                      *
17*4887Schin *                 Glenn Fowler <gsf@research.att.com>                  *
18*4887Schin *                  David Korn <dgk@research.att.com>                   *
19*4887Schin *                   Phong Vo <kpv@research.att.com>                    *
20*4887Schin *                                                                      *
21*4887Schin ***********************************************************************/
22*4887Schin #pragma prototyped
23*4887Schin 
24*4887Schin #if defined(__STDPP__directive) && defined(__STDPP__hide)
25*4887Schin __STDPP__directive pragma pp:hide strstr
26*4887Schin #else
27*4887Schin #define strstr		______strstr
28*4887Schin #endif
29*4887Schin 
30*4887Schin #include <ast.h>
31*4887Schin 
32*4887Schin #if defined(__STDPP__directive) && defined(__STDPP__hide)
33*4887Schin __STDPP__directive pragma pp:nohide strstr
34*4887Schin #else
35*4887Schin #undef	strstr
36*4887Schin #endif
37*4887Schin 
38*4887Schin #if _lib_strstr
39*4887Schin 
40*4887Schin NoN(strstr)
41*4887Schin 
42*4887Schin #else
43*4887Schin 
44*4887Schin #if defined(__EXPORT__)
45*4887Schin #define extern	__EXPORT__
46*4887Schin #endif
47*4887Schin 
48*4887Schin extern char*
49*4887Schin strstr(register const char* s1, register const char* s2)
50*4887Schin {
51*4887Schin 	register int		c1;
52*4887Schin 	register int		c2;
53*4887Schin 	register const char*	t1;
54*4887Schin 	register const char*	t2;
55*4887Schin 
56*4887Schin 	if (s2)
57*4887Schin 	{
58*4887Schin 		if (!*s2)
59*4887Schin 			return (char*)s1;
60*4887Schin 		c2 = *s2++;
61*4887Schin 		while (c1 = *s1++)
62*4887Schin 			if (c1 == c2)
63*4887Schin 			{
64*4887Schin 				t1 = s1;
65*4887Schin 				t2 = s2;
66*4887Schin 				do
67*4887Schin 				{
68*4887Schin 					if (!*t2)
69*4887Schin 						return (char*)s1 - 1;
70*4887Schin 				} while (*t1++ == *t2++);
71*4887Schin 			}
72*4887Schin 	}
73*4887Schin 	return 0;
74*4887Schin }
75*4887Schin 
76*4887Schin #endif
77