blib

queue.h

#ifndef DATA
 #define DATA void 
 #endif

 #ifndef QUEUE_H
 #define QUEUE_H

 struct qstruct;                              
 struct qiteratorstruct;                      

 typedef struct qstruct *Queue;               
 typedef struct qiteratorstruct *Iterator;    

 Queue new_queue();                   
 void delete_queue(Queue q);          
 void clear(Queue q);                 
 int  size(Queue q);                          
 void add(Queue q, int priority, DATA *d);    
 DATA *get_first(Queue q);                    
 void remove_first(Queue q);                   

 Iterator new_iterator(Queue q);       
 void delete_iterator(Iterator it);    
 void go_to_first(Iterator it);        
 void go_to_last(Iterator it);         
 void go_to_next(Iterator it);         
 void go_to_previous(Iterator it);     
 DATA *get_current(Iterator it);       
 int is_valid(Iterator it);            
                                       
 void change_current(Iterator it, DATA *d); 
 void remove_current(Iterator it);         
 void find(Iterator it, DATA *d);          
                                           
 #endif