private void InitFsmPage(IPage page, long previousPageIndex, long nextPageIndex, long basePageIndex)
{
var header = new FreeSpaceMapPageHeader
{
StartPageIndex = _firstFsmPageIndex,
NextPageIndex = nextPageIndex,
PreviousPageIndex = previousPageIndex,
BasePageIndex = basePageIndex
};
PageFormatter.InitPage(page, header);
PageFormatter.SetAllFsmValues(page, FsmValue.Full);
}
public void FsmPage()
{
int pageSize = 32768;
var dummyPageManager = new FileSystemPageManager(pageSize);
var p = new Page(dummyPageManager, 0, new byte[pageSize]);
var fsmh = new FreeSpaceMapPageHeader();
var r = new Random();
PageFormatter.InitPage(p, fsmh);
int fsmEntryCount = PageFormatter.GetFsmEntryCount(p);
// set all values to "full"
PageFormatter.SetAllFsmValues(p, FsmValue.Full);
// check if all values are actually "full"
for (int i = 0; i < fsmEntryCount; i++)
{
Assert.AreEqual(FsmValue.Full, PageFormatter.GetFsmValue(p, i));
}
var values = new FsmValue[fsmEntryCount];
// set and keep random values
for (int i = 0; i < fsmEntryCount; i++)
{
var value = (byte)r.Next((byte)FsmValue.Full + 1);
PageFormatter.SetFsmValue(p, i, (FsmValue)value);
values[i] = (FsmValue)value;
}
// compare it
for (int i = 0; i < fsmEntryCount; i++)
{
Assert.AreEqual(values[i], PageFormatter.GetFsmValue(p, i));
}
}
protected virtual void Init()
{
// add header page
IPage headingPage = PageManager.CreatePage();
Debug.Assert(headingPage.Index == 0, "The header page should have zero index");
var hph = new HeadingPageHeader
{
FsmPageIndex = 1,
AccessMethodPageIndex = 2,
PageSize = PageManager.PageSize,
OnDiskStructureVersion = OnDiskStructureVersion,
AccessMethod = (short)AccessMethod
};
PageFormatter.InitPage(headingPage, hph);
PageManager.UpdatePage(headingPage);
// add the first free-space-map page
IPage fsmPage = PageManager.CreatePage();
Debug.Assert(fsmPage.Index == 1, "The first free-space-map page should have index 1");
var fsmh = new FreeSpaceMapPageHeader
{
StartPageIndex = fsmPage.Index,
PreviousPageIndex = -1,
NextPageIndex = -1,
BasePageIndex = 0
};
PageFormatter.InitPage(fsmPage, fsmh);
PageFormatter.SetAllFsmValues(fsmPage, FsmValue.Full);
PageManager.UpdatePage(fsmPage);
}
