/*
 * fdlist.c   maintain lists of certain important fds 
 */

/* $Id: fdlist.c,v 1.1.1.1 2005/06/27 03:02:09 sheik Exp $ */

#include "struct.h"
#include "common.h"
#include "sys.h"
#include "h.h"
#include "config.h"
#include "fdlist.h"

#ifdef USE_KQUEUE
#include <sys/event.h>
#endif

void addto_fdlist(int fd, fdlist * listp)
{
    int index;
    
    if ((index = ++listp->last_entry) >= MAXCONNECTIONS) {
	/* list too big.. must exit */
	--listp->last_entry;
	
#ifdef	USE_SYSLOG
	(void) syslog(LOG_CRIT, "fdlist.c list too big.. must exit");
#endif
	abort();
    }
    else
	listp->entry[index] = fd;
    return;
}

void delfrom_fdlist(int fd, fdlist * listp)
{
    int i;
    
    for (i = listp->last_entry; i; i--)
    {
	if (listp->entry[i] == fd)
	    break;
    }
    if (!i)
	return;			/* could not find it! */
    /* swap with last_entry */
    if (i == listp->last_entry)
    {
	listp->entry[i] = 0;
	listp->last_entry--;
	return;
    }
    else
    {
	listp->entry[i] = listp->entry[listp->last_entry];
	listp->entry[listp->last_entry] = 0;
	listp->last_entry--;
	return;
    }
}

void init_fdlist(fdlist * listp)
{
    listp->last_entry = 0;
    memset((char *) listp->entry, '\0', sizeof(listp->entry));
#ifdef USE_KQUEUE
    listp->kqueue_fd = kqueue();
#endif
    return;
}