#ifndef _TAPE_H
#define _TAPE_H
#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include "table.h"

#define TAPE_CHUNK_SIZE 100

struct tape
{
    int head;                   // Head position
    int blank;                  // Blank symbol
    int *nsyms, *psyms;         // Halves of the infinite tape for negative and positive indices
    int ncapacity, pcapacity;   // Capacities of the two tape halves
};

struct tape *tape_new(int blank);
int tape_read(struct tape *t, int pos);
void tape_write(struct tape *t, int pos, int sym);
int tape_load(struct tape *t, FILE *f, int offset, struct table *symbols);
void tape_print(struct tape *t, struct table *sym);

#endif