#include "types.h"

#include <stdlib.h>

void stack_init(Stack* stack, uint32_t len) {
    stack->index = 0;
    stack->len = len;
    stack->data = malloc(stack->len * sizeof(union stored));
}

void stack_push(Stack* stack, void* value) {
    if (stack->index == stack->len) {
        stack->len *= 2;
        stack->data = realloc(stack->data, stack->len * sizeof(union stored));
    }
    stack->data[stack->index].p = value;
    stack->index++;
}

void* stack_pop(Stack* stack) {
    if (stack->index == 0) {
        return NULL;
    }
    stack->index--;
    return stack->data[stack->index].p;
}

void stack_pushi(Stack* stack, uint32_t value) {
    if (stack->index == stack->len) {
        stack->len *= 2;
        stack->data = realloc(stack->data, stack->len * sizeof(union stored));
    }
    stack->data[stack->index].i = value;
    stack->index++;
}

uint32_t stack_popi(Stack* stack) {
    if (stack->index == 0) {
        return 0;
    }
    stack->index--;
    return stack->data[stack->index].i;
}

void stack_free(Stack* stack) {
    free(stack->data);
}