container.c

#include "nacc.h"

Vector *new_vector() {
  Vector *vec = malloc(sizeof(Vector));
  vec->data = malloc(sizeof(void *) * 16);
  vec->capacity = 16;
  vec->len = 0;
  return vec;
}

void vec_push(Vector *vec, void *elem) {
  if (vec->capacity == vec->len) {
    vec->capacity *= 2;
    vec->data = realloc(vec->data, sizeof(void *) * vec->capacity);
  }
  vec->data[vec->len++] = elem;
}

void expect(int line, int expected, int actual) {
  if (expected == actual) return;
  fprintf(stderr, "%d: %d expected, but got %d\n", line, expected, actual);
  exit(1);
}

void test_vector() {
  Vector *vec = new_vector();
  expect(__LINE__, 0, vec->len);

  // intだとサイズが違って警告が出るので代わりにlongを使う
  // warning: cast to pointer from integer of different size
  // [-Wint-to-pointer-cast]
  // for (int i = 0; i < 100; i++) vec_push(vec, (void *)i);
  for (long i = 0; i < 100; i++) vec_push(vec, (void *)i);

  expect(__LINE__, 100, vec->len);
  expect(__LINE__, 0, (long)vec->data[0]);
  expect(__LINE__, 50, (long)vec->data[50]);
  expect(__LINE__, 99, (long)vec->data[99]);
}

void runtest() {
  test_vector();

  printf("OK\n");
}