/// <summary>
/// Builds the allocation chain following an interval
/// </summary>
/// <param name="database">The database.</param>
/// <param name="pageAddress">The page address.</param>
protected virtual void BuildChain(Database database, PageAddress pageAddress)
{
var page = new AllocationPage(database, pageAddress);
if (page.Header.PageType == PageType.Iam)
{
//throw new ArgumentException();
}
Pages.Add(page);
SinglePageSlots.AddRange(page.SinglePageSlots);
interval = Database.AllocationInterval;
var pageCount = (int)Math.Ceiling(database.FileSize(pageAddress.FileId) / (decimal)interval);
if (pageCount > 1)
{
for (var i = 1; i < pageCount; i++)
{
Pages.Add(new AllocationPage(database,
new PageAddress(pageAddress.FileId,
pageAddress.PageId + (i * interval))));
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="Allocation"/> class.
/// </summary>
/// <param name="page">The page.</param>
public Allocation(AllocationPage page)
{
FileId = page.PageAddress.FileId;
MultiFile = false;
Pages.Add(page);
interval = Database.AllocationInterval;
SinglePageSlots.AddRange(page.SinglePageSlots);
}
/// <summary>
/// Refreshes this instance.
/// </summary>
public void Refresh()
{
SinglePageSlots.Clear();
foreach (var page in Pages)
{
page.Refresh();
SinglePageSlots.AddRange(page.SinglePageSlots);
}
}
/// <summary>
/// Builds an allocation chain based on linkage through the headers.
/// </summary>
/// <param name="database"></param>
/// <param name="pageAddress"></param>
protected new void BuildChain(Database database, PageAddress pageAddress)
{
var page = new AllocationPage(database, pageAddress);
Pages.Add(page);
SinglePageSlots.AddRange(page.SinglePageSlots);
if (page.Header.NextPage != PageAddress.Empty)
{
BuildChain(database, page.Header.NextPage);
}
}
/// <summary>
/// Loads the single page slots.
/// </summary>
private void LoadSinglePageSlots()
{
var offset = SinglePageSlotOffset;
for (var i = 0; i < 8; i++)
{
var pageAddress = new byte[6];
Array.Copy(PageData, offset, pageAddress, 0, 6);
SinglePageSlots.Add(new PageAddress(pageAddress));
offset += 6;
}
}
