#include <stdlib.h> // NULL
#include "stack.h"

struct Stack {
  int length;
};

struct Stack* s_create() {
  return NULL;
}

int s_push(struct Stack* s, void* v) {
  return 0;
}

int s_length(struct Stack* s) {
  return 0;
}

void* s_pop(struct Stack* s) {
  return NULL;
}

void* s_peek(struct Stack* s) {
  return NULL;
}

void s_destroy(struct Stack* s) {
}