Function AddListItem

Descent3/list.cpp:43–75

Adds an item to a list Returns 1 if everything is ok, else 0

// Adds an item to a list
// Returns 1 if everything is ok, else 0
int AddListItem(listnode **listp, void *item) {
  listnode *newnode, *curr;

  newnode = NewListNode();

  if (newnode == NULL) {
    mprintf(0, "There was a problem mallocing list node memory!\n");
    Int3();
    return 0;
  }

  if (*listp == NULL) // If this list is empty, construct a new head
  {
    newnode->data = item;
    *listp = newnode;
    return 1;
  } else {
    // Go through until the end of the list and add the new item there
    for (curr = *listp; curr->next != NULL; curr = curr->next) {
      if (curr->data == item) {
        Int3();
        return 0;
      }
    }

    newnode->data = item;
    curr->next = newnode;
    newnode->next = NULL;
    newnode->prev = curr;
  }

  return 1;
}

// Removes an item from a list
int RemoveListItem(listnode **listp, void *item) {