src/tape.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

#include "types.h"

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

void tape_init(Tape* tape, uint8_t len) {
    tape->index = 0;
    tape->len = len;
    tape->data = malloc(tape->len);
    memset(tape->data, 0, len);
}

void tape_free(Tape* tape) {
    free(tape->data);
}

void tape_left(Tape* tape) {
    tape->index--;
}

void tape_right(Tape* tape) {
    tape->index++;
}

void tape_increment(Tape* tape) {
    tape->data[tape->index]++;
}

void tape_decrement(Tape* tape) {
    tape->data[tape->index]--;
}

uint8_t tape_get(Tape* tape) {
    return tape->data[tape->index];
}

void tape_set(Tape* tape, uint8_t value) {
    tape->data[tape->index] = value;
}

void* tape_ptr(Tape* tape) {
    return tape->data + tape->index;
}