#pragma once
#include <stddef.h>
#include <stdint.h>

// uint64_t only
struct stack {
    size_t sp, size;
    uint64_t *data;
};

int stack_init(struct stack *st, size_t size);
void stack_free(struct stack *st);
int stack_push(struct stack *st, uint64_t w);
int stack_pop(struct stack *st, uint64_t *w);