#ifndef SINGLE_LIST
#define SINGLE_LIST

#include <stdlib.h>

typedef struct single_node {
	int value;
	struct single_node *next;
} Single_node;

/* typedef struct single_node Single_node; */

typedef struct {
	Single_node *head;
	Single_node *tail;
	int count;
} Single_list;

extern void init_sl( Single_list *this );
extern void destroy_sl( Single_list *this );
extern void init_sn( Single_node *this, int v, Single_node *n );
extern int empty( Single_list *this );
extern int size( Single_list *this );
extern int front( Single_list *this );
extern int back( Single_list *this );
extern void push_front( Single_list *this, int v );
extern void push_back( Single_list *this, int v );
extern int pop_front( Single_list *this );

#endif