pathqueue.h

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#ifndef _PATH_QUEUE_H
#define _PATH_QUEUE_H


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

#ifdef __cplusplus
extern "C" {
#endif 

typedef struct _Node{
        int x;          
        int y;          
        struct _Node * next; 
} Node;

typedef struct _NodeQueue{
        Node *first;    
        Node *last;     
} NodeQueue;

int queueIsEmpty(NodeQueue *q);

void pushNode(NodeQueue * q, int x, int y);

void pushNodeLast(NodeQueue * q, int x, int y);

int popNode(NodeQueue * q, Node * n);

void printQueue(NodeQueue * q);

NodeQueue * newQueue( void );

int delQueue(NodeQueue * q);

int isInQueue(NodeQueue * q, int x, int y);

void drainQueue(NodeQueue * q);




#ifdef __cplusplus
}
#endif 

#endif /*_PATH_QUEUE_H*/

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