libcproject/lib/array_list.c

#include "array_list.h"

struct array_list* array_list_initialization() {
  return array_list_initialization_with_capacity(ARRAY_LIST_INITIAL_CAPACITY);
}

struct array_list* array_list_initialization_with_capacity(size_t capacity) {
  struct array_list* list = malloc(sizeof(struct array_list));
  if (list == NULL) {
    perror("Error (array_list_initialization)");
    exit(EXIT_FAILURE);
  }
  list->size = 0;
  list->capacity = capacity;
  list->capacity_step = capacity;
  list->data = malloc(sizeof(void*) * list->capacity);
  if (list->data == NULL) {
    perror("Error (array_list_initialization)");
    exit(EXIT_FAILURE);
  }
  return list;
}

void array_list_add(struct array_list* list, void* element) {
  if (list->size >= list->capacity) {
    size_t previous_capacity = list->capacity;
    list->capacity += list->capacity_step;
    list->data = realloc(list->data, sizeof(void*) * list->capacity);
    if (list->data == NULL) {
      perror("Error (array_list_add)");
      exit(EXIT_FAILURE);
    }
    for (size_t index = previous_capacity; index < list->capacity; index++) {
      list->data[index] = NULL;
    }
  }
  list->data[list->size] = element;
  list->size++;
}

void array_list_remove(struct array_list* list, size_t index) {
  if (index >= list->size) {
    return;
  }
  for (size_t i = index; i < list->size - 1; i++) {
    list->data[i] = list->data[i + 1];
  }
  list->size--;
}

void* array_list_get(struct array_list* list, size_t index) {
  if (index >= list->size) {
    return NULL;
  }
  return list->data[index];
}

void array_list_free(struct array_list* list) {
  free(list->data);
  free(list);
}