taskrambler  0.1.8
Web server and task management solution.
interface.c
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1 /**
2  * \file
3  *
4  * \author Georg Hopp
5  *
6  * \copyright
7  * Copyright © 2012 Georg Hopp
8  *
9  * This program is free software: you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation, either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program. If not, see <http://www.gnu.org/licenses/>.
21  */
22 
23 #include <sys/types.h>
24 #include <stdlib.h>
25 
26 #include "class/interface.h"
27 #include "commons.h"
28 
29 static
30 inline
31 int
32 comp(const void * _a, const void * _b)
33 {
34  const struct interface * a = **(const struct interface ***)_a;
35  const struct interface * b = **(const struct interface ***)_b;
36  return ((a)<(b))? -1 : ((a)>(b))? 1 : 0;
37 }
38 
39 /**
40  * this one is important in selector functions to get the correct interface
41  * implementation of a class.
42  */
44 interfaceGet(iface_impl_ptr iface_impl, const iface_ptr _iface)
45 {
46  const iface_ptr * iface = &_iface;
47  iface_ptr * found;
48 
49  if (! iface_impl->simpl) {
50  qsort((void**)(iface_impl->impl), iface_impl->nimpl, sizeof(iface_ptr), comp);
51  iface_impl->simpl=TRUE;
52  }
53 
54  found = bsearch(
55  &iface,
56  iface_impl->impl,
57  iface_impl->nimpl,
58  sizeof(iface_ptr),
59  comp);
60 
61  return found? *found : (iface_ptr)NULL;
62 }
63 
64 // vim: set ts=4 sw=4:
const struct interface * iface_ptr
Definition: interface.h:46
static int comp(const void *_a, const void *_b)
Definition: interface.c:32
#define TRUE
Definition: commons.h:27
iface_ptr interfaceGet(iface_impl_ptr iface_impl, const iface_ptr _iface)
Definition: interface.c:44