/* This file is part of the Project Athena Zephyr Notification System.
 * It contains source for the ZPeekIfNotice function.
 *
 *	Created by:	Robert French
 *
 *	$Source$
 *	$Author$
 *
 *	Copyright (c) 1987,1988 by the Massachusetts Institute of Technology.
 *	For copying and distribution information, see the file
 *	"mit-copyright.h". 
 */
/* $Header$ */

#ifndef lint
static char rcsid_ZPeekIfNotice_c[] = "$Header$";
#endif

#include <zephyr/mit-copyright.h>

#include <zephyr/zephyr_internal.h>

Code_t ZPeekIfNotice(notice, from, predicate, args)
    ZNotice_t *notice;
    struct sockaddr_in *from;
    int (*predicate)();
    char *args;
{
    ZNotice_t tmpnotice;
    Code_t retval;
    char *buffer;
    struct _Z_InputQ *qptr;

    if ((retval = Z_WaitForComplete()) != ZERR_NONE)
	return (retval);
    
    for (;;) {
	qptr = Z_GetFirstComplete();
	while (qptr) {
	    if ((retval = ZParseNotice(qptr->packet, qptr->packet_len, 
				       &tmpnotice)) != ZERR_NONE)
		return (retval);
	    if ((*predicate)(&tmpnotice, args)) {
		if (!(buffer = (char *) malloc((unsigned) qptr->packet_len)))
		    return (ENOMEM);
		bcopy(qptr->packet, buffer, qptr->packet_len);
		if (from)
		    *from = qptr->from;
		if ((retval = ZParseNotice(buffer, qptr->packet_len, 
					   notice)) != ZERR_NONE) {
		    free(buffer);
		    return (retval);
		}
		return (ZERR_NONE);
	    }
	    qptr = Z_GetNextComplete(qptr);
	}
	if ((retval = Z_ReadWait()) != ZERR_NONE)
	    return (retval);
    }
}