/**
* Returns the BATBlock that handles the specified offset,
* and the relative index within it
*/
public override BATBlockAndIndex GetBATBlockAndIndex(int offset)
{
return(BATBlock.GetBATBlockAndIndex(offset, _header, _bat_blocks));
}
public void TestGetBATBlockAndIndex()
{
HeaderBlock header = new HeaderBlock(POIFSConstants.SMALLER_BIG_BLOCK_SIZE_DETAILS);
List <BATBlock> blocks = new List <BATBlock>();
int offset;
// First, try a one BAT block file
header.BATCount = (1);
blocks.Add(
BATBlock.CreateBATBlock(header.BigBlockSize, new ByteBuffer(512, 512))
);
offset = 0;
Assert.AreEqual(0, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 1;
Assert.AreEqual(1, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 127;
Assert.AreEqual(127, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
// Now go for one with multiple BAT blocks
header.BATCount = (2);
blocks.Add(
BATBlock.CreateBATBlock(header.BigBlockSize, new ByteBuffer(512, 512))
);
offset = 0;
Assert.AreEqual(0, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 127;
Assert.AreEqual(127, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 128;
Assert.AreEqual(0, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(1, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 129;
Assert.AreEqual(1, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(1, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
// The XBAT count makes no difference, as we flatten in memory
header.BATCount = (1);
header.XBATCount = (1);
offset = 0;
Assert.AreEqual(0, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 126;
Assert.AreEqual(126, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 127;
Assert.AreEqual(127, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 128;
Assert.AreEqual(0, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(1, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 129;
Assert.AreEqual(1, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(1, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
// Check with the bigger block size too
header = new HeaderBlock(POIFSConstants.LARGER_BIG_BLOCK_SIZE_DETAILS);
offset = 0;
Assert.AreEqual(0, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 1022;
Assert.AreEqual(1022, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 1023;
Assert.AreEqual(1023, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 1024;
Assert.AreEqual(0, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(1, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
// Biggr block size, back to real BATs
header.BATCount = (2);
offset = 0;
Assert.AreEqual(0, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 1022;
Assert.AreEqual(1022, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 1023;
Assert.AreEqual(1023, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(0, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
offset = 1024;
Assert.AreEqual(0, BATBlock.GetBATBlockAndIndex(offset, header, blocks).Index);
Assert.AreEqual(1, blocks.IndexOf(BATBlock.GetBATBlockAndIndex(offset, header, blocks).Block));
}