interface.c
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/**
* \file
* Get an interface implementation from a implementation structure.
*
* \author Georg Hopp
*
* \copyright
* Copyright © 2014 Georg Hopp
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <stdlib.h>
#include "tr/interface.h"
#include "tr/commons.h"
/**
* Compare interfaces.
* Used with bsearch on the interfaces.
*/
static
inline
int
comp(const void * _a, const void * _b)
{
const struct interface * a = **(const struct interface ***)_a;
const struct interface * b = **(const struct interface ***)_b;
return ((a)<(b))? -1 : ((a)>(b))? 1 : 0;
}
/**
* Get a specific interface implementation from the interface
* implementation from a class.
*/
TR_iface_ptr
TR_interfaceGet(TR_iface_impl_ptr iface_impl, const TR_iface_ptr _iface)
{
const TR_iface_ptr * iface = &_iface;
TR_iface_ptr * found;
if (! iface_impl->simpl) {
qsort(
(void**)(iface_impl->impl),
iface_impl->nimpl,
sizeof(TR_iface_ptr), comp);
iface_impl->simpl=TRUE;
}
found = bsearch(
&iface,
iface_impl->impl,
iface_impl->nimpl,
sizeof(TR_iface_ptr),
comp);
return found? *found : (TR_iface_ptr)NULL;
}
// vim: set ts=4 sw=4: