#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "queue.h"

/****************************************************************************
 *  InitQueue initializes a queue for use by the other queue functions.
 ***************************************************************************/

 void
InitQueue (QUE_DEF * Q) {

	Q->Head = Q->Current = NULL;
	Q->Count = 0;
	}

/****************************************************************************
 *  Enque  creates a queue entry linked to the other entries in FIFO order
 *  and puts the string passed into the queue entry.  It returns a pointer
 *  to the entry created [NULL if there is not enough memory for the entry.
 ***************************************************************************/

 QUE_ENTRY      *
Enque (QUE_DEF * Q, void *Body) {
	QUE_ENTRY      *p;

	if ((p = malloc(sizeof(QUE_ENTRY))) == NULL) return (NULL);
	p->Next = NULL;
	p->Body = Body;
	if (Q->Head == NULL) Q->Head = p;
	else Q->Current->Next = p;
	Q->Current = p;
	++Q->Count;
	return (p);
	}