public override Block Create(uint block)
{
if (!vhdFile.BlockAllocationTable.HasData(block))
{
if (cachedBlock == null || cachedBlock.BlockIndex != block)
{
cachedBlock = new Block(this)
{
BlockIndex = block,
VhdUniqueId = this.vhdFile.Footer.UniqueId,
LogicalRange = IndexRange.FromLength(block * GetBlockSize(), vhdFile.Header.BlockSize),
BitMap = null,
Empty = true
};
}
return(cachedBlock);
}
if (cachedBlock == null || cachedBlock.BlockIndex != block)
{
cachedBlock = new Block(this)
{
BlockIndex = block,
VhdUniqueId = this.vhdFile.Footer.UniqueId,
LogicalRange = IndexRange.FromLength(block * GetBlockSize(), vhdFile.Header.BlockSize),
BitMap = bitMapFactory.Create(block),
Empty = false
};
}
return(cachedBlock);
}
public override Block Create(uint block)
{
if (!vhdFile.BlockAllocationTable.HasData(block))
{
if (cachedBlock == null || cachedBlock.BlockIndex != block)
{
IndexRange logicalRange = IndexRange.FromLength(block * GetBlockSize(), this.GetBlockSize());
if (ExtraBlockIndex.HasValue && block == ExtraBlockIndex)
{
long startIndex = block * GetBlockSize();
long size = vhdFile.Footer.CurrentSize - startIndex;
logicalRange = IndexRange.FromLength(startIndex, size);
}
cachedBlock = new Block(this)
{
BlockIndex = block,
VhdUniqueId = this.vhdFile.Footer.UniqueId,
LogicalRange = logicalRange,
BitMap = null,
Empty = true
};
}
return(cachedBlock);
}
if (cachedBlock == null || cachedBlock.BlockIndex != block)
{
IndexRange logicalRange = IndexRange.FromLength(block * GetBlockSize(), this.GetBlockSize());
if (ExtraBlockIndex.HasValue && block == ExtraBlockIndex)
{
long startIndex = block * GetBlockSize();
long size = vhdFile.Footer.CurrentSize - startIndex;
logicalRange = IndexRange.FromLength(startIndex, size);
}
cachedBlock = new Block(this)
{
BlockIndex = block,
VhdUniqueId = this.vhdFile.Footer.UniqueId,
LogicalRange = logicalRange,
BitMap = bitMapFactory.Create(block),
Empty = false
};
}
return(cachedBlock);
}