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The Datafile PD-CD 4
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deque
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Text File
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1992-07-21
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1KB
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45 lines
/* > H.Deque - Deque data type header file */
#ifndef __deque_h
#define __deque_h
struct deque
{
void *head; /* pointer to head of deque */
void *tail; /* pointer to tail of deque */
int obj_size; /* size of one element */
};
typedef struct deque *deque;
#define Front 1
#define Back 0
/* General component routines */
deque deq_new (int obj_len);
void deq_free (deque d);
void deq_clear (deque d);
int deq_copy (deque d1, const deque d2);
int deq_equal (const deque d1, const deque d2);
int deq_empty (const deque d);
int deq_size (const deque d);
/* Iterator */
#define STATUS_CONTINUE 0 /* Continue processing */
#define STATUS_STOP 1 /* Stop processing */
#define STATUS_ERROR (-1) /* Error - terminate */
int deq_iterate (const deque d, int (*process)(void *));
/* Deque-specific routines */
int deq_add (deque d, int pos, const void *object);
int deq_pop (deque d, int pos);
void *deq_front (const deque d);
void *deq_back (const deque d);
#endif