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 #include <ast.h>
25 
26 #if !_UWIN
27 
_STUB_stdfun()28 void _STUB_stdfun(){}
29 
30 #else
31 
32 #include <ast_windows.h>
33 #include <uwin.h>
34 #include <dlfcn.h>
35 #include "FEATURE/uwin"
36 
37 #if _lib___iob_func
38 #define IOB		((char*)__iob_func())
39 #elif _lib___p__iob
40 #define IOB		((char*)__p__iob())
41 #elif _dat__iob
42 #define IOB		((char*)_iob)
43 #else
44 #define IOB		((char*)_p__iob())
45 #endif
46 
47 #define IOBMAX		(512*32)
48 
49 #include "stdhdr.h"
50 
51 int
_stdfun(Sfio_t * f,Funvec_t * vp)52 _stdfun(Sfio_t* f, Funvec_t* vp)
53 {
54 	static char*	iob;
55 	static int	init;
56 	static void*	bp;
57 	static void*	np;
58 
59 	if (!iob && !(iob = IOB))
60 		return 0;
61 	if (f && ((char*)f < iob || (char*)f > iob+IOBMAX))
62 		return 0;
63 	if (!vp->vec[1])
64 	{
65 		if (!init)
66 		{
67 			init = 1;
68 			bp = dlopen("/usr/bin/stdio.dll", 0);
69 		}
70 		if (bp && (vp->vec[1] = (Fun_f)dlsym(bp, vp->name)))
71 			return 1;
72 		if (!np && !(np = dlopen("/sys/msvcrt.dll", 0)))
73 			return -1;
74 		if (!(vp->vec[1] = (Fun_f)dlsym(np, vp->name)))
75 			return -1;
76 	}
77 	return 1;
78 }
79 
80 #endif
81