private static void MergeAfterTestAssert(int sizeIndex1, int endIndex1, int sizeIndex2, int endIndex2)
{
PersistentHeapFreeSpace freeSpace1 = new PersistentHeapFreeSpace(sizeIndex1, endIndex1, 5);
PersistentHeapFreeSpace freeSpace2 = new PersistentHeapFreeSpace(sizeIndex2, endIndex2, 6);
freeSpace1.MergeAfter(freeSpace2);
Assert.AreEqual(endIndex2, freeSpace1.EndIndex);
Assert.AreEqual(endIndex2 - sizeIndex1 - PersistentHeapSpace.GetUserSizeSize() + 1, freeSpace1.UserSize);
}
private static void SplitTestAssert(int sizeIndex, int userSize, int newUserSize)
{
PersistentHeapFreeSpace freeSpace = new PersistentHeapFreeSpace(sizeIndex, sizeIndex + userSize + PersistentHeapSpace.GetUserSizeSize() - 1, 29);
PersistentHeapUsedSpace usedSpace = freeSpace.Split(newUserSize);
Assert.AreEqual(newUserSize, freeSpace.UserSize);
Assert.AreEqual(sizeIndex, freeSpace.SizeIndex);
Assert.AreEqual(sizeIndex + newUserSize + PersistentHeapSpace.GetUserSizeSize() - 1, freeSpace.EndIndex);
Assert.AreEqual(userSize - newUserSize - PersistentHeapSpace.GetUserSizeSize(), usedSpace.UserSize);
Assert.AreEqual(sizeIndex + newUserSize + PersistentHeapSpace.GetUserSizeSize() - 1 + 1, usedSpace.SizeIndex);
}
public void SerializeTest()
{
int sizeIndex = 7;
int endIndex = 20;
byte[] data = new byte[] { 1, 2, 3, 4, 5, 6, };
PersistentHeapUsedSpace usedSpace = new PersistentHeapUsedSpace(sizeIndex, endIndex, data);
int userSize = (endIndex - sizeIndex - PersistentHeapSpace.GetUserSizeSize() + 1);
byte[] userSizeBytes = userSize.ToBytes();
byte[] expected = userSizeBytes.Append(data);
TestHelper.AssertByteArraysAreSame(expected, usedSpace.Serialize());
}
private PersistentHeapUsedSpace GetSpaceAt(int token)
{
int sizeIndex = token - PersistentHeapSpace.GetUserSizeSize();
byte[] sizeBytes = _file.GetAmount(sizeIndex, PersistentHeapSpace.GetUserSizeSize());
int userSize = PersistentHeapSpace.GetUserSize(sizeBytes);
int fullLength = userSize + PersistentHeapSpace.GetUserSizeSize();
int endIndex = sizeIndex + fullLength - 1;
byte[] data = _file.GetRange(sizeIndex + PersistentHeapSpace.GetUserSizeSize(), endIndex);
//let PersistentHeapUsedSpace be default
PersistentHeapUsedSpace usedSpace = new PersistentHeapUsedSpace(sizeIndex, endIndex, data);
return(usedSpace);
}
private PersistentHeapFreeSpace GetFreeSpaceThatIsAtLeast(int userSize)
{
PersistentHeapFreeSpace lastFreeSpace = null;
//try to find a space in the free spaces list
foreach (PersistentHeapFreeSpace persistentHeapFreeSpace in GetFreeSpaces())
{
if (persistentHeapFreeSpace.UserSize >= userSize)
{
return(persistentHeapFreeSpace);
}
lastFreeSpace = persistentHeapFreeSpace;
}
//couldn't freespace available that is big enough, going to make our own
int openIndex = _file.GetNextIndex();
int fullSize = userSize + PersistentHeapSpace.GetUserSizeSize();
PersistentHeapFreeSpace freeSpaceOnTheEnd = new PersistentHeapFreeSpace(openIndex, openIndex + fullSize - 1, FreeLinkedListNullPointer);
//update the free linked list
if (lastFreeSpace == null) //there are no nodes in the free space linked list
{
Debug.Assert(GetFreeSpaceHead() == FreeLinkedListNullPointer);
PutFreeSpaceHead(freeSpaceOnTheEnd.StartIndex);
}
else //there are nodes in the free space linked list
{
Debug.Assert(lastFreeSpace != null);
lastFreeSpace.NextFreeSpace = freeSpaceOnTheEnd.StartIndex;
PutFullSpace(lastFreeSpace);
}
PutFullSpace(freeSpaceOnTheEnd);
return(freeSpaceOnTheEnd);
}
private static void StartIndexTestAssert(int startIndex, int userSize)
{
PersistentHeapSpace space = InitHeapSpace(startIndex - PersistentHeapSpace.GetUserSizeSize(), startIndex + userSize, new byte[0]);
Assert.AreEqual(startIndex, space.StartIndex);
}
private static void UserSizeTestAssert(int userSize, int sizeIndex)
{
PersistentHeapSpace space = InitHeapSpace(sizeIndex, sizeIndex + userSize + PersistentHeapSpace.GetUserSizeSize() - 1, new byte[0]);
Assert.AreEqual(userSize, space.UserSize);
}