/*
 * Copyright (C) 2023 Johnny Richard
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
#include "vector.h"
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

vector_t *
vector_new()
{
  vector_t *vector = (vector_t *)malloc(sizeof(vector_t));

  if (vector == NULL) {
    fprintf(stderr, "failed to create vector: %s\n", strerror(errno));
    exit(EXIT_FAILURE);
  }

  vector->items = calloc(sizeof(void *), VECTOR_INITIAL_CAPACITY);

  if (vector->items == NULL) {
    free(vector);
    fprintf(stderr, "failed to create vector items: %s\n", strerror(errno));
    exit(EXIT_FAILURE);
  }

  vector->size = 0;
  vector->capacity = VECTOR_INITIAL_CAPACITY;
  return vector;
}

void
vector_resize(vector_t *vector)
{
  vector->capacity = vector->capacity * 2;
  vector->items = realloc(vector->items, sizeof(void *) * vector->capacity);
  if (vector->items == NULL) {
    vector_destroy(vector);
    fprintf(stderr, "failed to reallocat memory for vector: %s\n", strerror(errno));
    exit(EXIT_FAILURE);
  }
}

void
vector_push_back(vector_t *vector, void *item)
{
  assert(vector);
  assert(item);
  if (vector->size == vector->capacity) {
    vector_resize(vector);
  }
  vector->items[vector->size++] = item;
}

void *
vector_at(vector_t *vector, uint32_t index)
{
  assert(vector);
  return vector->items[index];
}

void
vector_destroy(vector_t *vector)
{
  assert(vector);
  free(vector->items);
  free(vector);
}