fis-gtm/sr_unix_gnp/cmj_firstone.c

31 lines
736 B
C

/****************************************************************
* *
* Copyright 2001 Sanchez Computer Associates, Inc. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "cmidef.h"
/* scan and reset the first fd
* n - max fd (+1) to look at
*
* return -1 (if no bits set) or fd
*/
int cmj_firstone(fd_set *s, int n)
{
int i;
for (i = 0; i < n; i++) {
if (FD_ISSET(i, s)) {
FD_CLR(i, s);
return i;
}
}
return -1;
}