interface.c
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#include <sys/types.h>
#include <stdlib.h>
#include "interface.h"
#ifndef TRUE
#define TRUE 1
#endif // TRUE
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;
}
/**
* this one is important in selector functions to get the correct interface
* implementation of a class.
*/
struct interface *
interfaceGet(iface_impl_ptr iface_impl, const iface_ptr _iface)
{
const iface_ptr * iface = &_iface;
void * dummy;
if (! iface_impl->simpl) {
qsort((void**)(iface_impl->impl), iface_impl->nimpl, sizeof(iface_ptr), comp);
iface_impl->simpl=TRUE;
}
dummy = bsearch(
&iface,
iface_impl->impl,
iface_impl->nimpl,
sizeof(iface_ptr),
comp);
return dummy? *(struct interface **)dummy : dummy;
}
// vim: set ts=4 sw=4: