/**
* Read and process the PropertiesTable and the
* FAT / XFAT blocks, so that we're Ready to
* work with the file
*/
private void ReadCoreContents()
{
// Grab the block size
bigBlockSize = _header.BigBlockSize;
// Each block should only ever be used by one of the
// FAT, XFAT or Property Table. Ensure it does
ChainLoopDetector loopDetector = GetChainLoopDetector();
// Read the FAT blocks
foreach (int fatAt in _header.BATArray)
{
ReadBAT(fatAt, loopDetector);
}
// Now read the XFAT blocks, and the FATs within them
BATBlock xfat;
int nextAt = _header.XBATIndex;
for (int i = 0; i < _header.XBATCount; i++)
{
loopDetector.Claim(nextAt);
ByteBuffer fatData = GetBlockAt(nextAt);
xfat = BATBlock.CreateBATBlock(bigBlockSize, fatData);
xfat.OurBlockIndex = nextAt;
nextAt = xfat.GetValueAt(bigBlockSize.GetXBATEntriesPerBlock());
_xbat_blocks.Add(xfat);
for (int j = 0; j < bigBlockSize.GetXBATEntriesPerBlock(); j++)
{
int fatAt = xfat.GetValueAt(j);
if (fatAt == POIFSConstants.UNUSED_BLOCK)
{
break;
}
ReadBAT(fatAt, loopDetector);
}
}
// We're now able to load steams
// Use this to read in the properties
_property_table = new NPropertyTable(_header, this);
// Finally read the Small Stream FAT (SBAT) blocks
BATBlock sfat;
List <BATBlock> sbats = new List <BATBlock>();
_mini_store = new NPOIFSMiniStore(this, _property_table.Root, sbats, _header);
nextAt = _header.SBATStart;
for (int i = 0; i < _header.SBATCount; i++)
{
loopDetector.Claim(nextAt);
ByteBuffer fatData = GetBlockAt(nextAt);
sfat = BATBlock.CreateBATBlock(bigBlockSize, fatData);
sfat.OurBlockIndex = nextAt;
sbats.Add(sfat);
nextAt = GetNextBlock(nextAt);
}
}
private NPOIFSFileSystem(bool newFS)
{
_header = new HeaderBlock(bigBlockSize);
_property_table = new NPropertyTable(_header);
_mini_store = new NPOIFSMiniStore(this, _property_table.Root, new List <BATBlock>(), _header);
_xbat_blocks = new List <BATBlock>();
_bat_blocks = new List <BATBlock>();
_root = null;
if (newFS)
{
// Data needs to Initially hold just the header block,
// a single bat block, and an empty properties section
_data = new ByteArrayBackedDataSource(new byte[bigBlockSize.GetBigBlockSize() * 3]);
}
}
public void TestPropertiesAndFatOnRead()
{
NPOIFSFileSystem fsA, fsB;
fsA = new NPOIFSFileSystem(_inst.GetFile("BlockSize512.zvi"));
fsB = new NPOIFSFileSystem(_inst.OpenResourceAsStream("BlockSize512.zvi"));
foreach (NPOIFSFileSystem fs in new NPOIFSFileSystem[] { fsA, fsB })
{
fs.GetBATBlockAndIndex(0);
fs.GetBATBlockAndIndex(1);
try
{
fs.GetBATBlockAndIndex(140);
Assert.Fail("Should only be one BAT, but a 2nd was found");
}
//catch (IndexOutOfRangeException)
catch (ArgumentOutOfRangeException)
{
}
Assert.AreEqual(98, fs.GetNextBlock(97));
Assert.AreEqual(POIFSConstants.END_OF_CHAIN, fs.GetNextBlock(98));
NPropertyTable props = fs.PropertyTable;
Assert.AreEqual(90, props.StartBlock);
Assert.AreEqual(7, props.CountBlocks);
RootProperty root = props.Root;
Assert.AreEqual("Root Entry", root.Name);
Assert.AreEqual(11564, root.Size);
Assert.AreEqual(0, root.StartBlock);
NStorage.Properties.Property prop;
IEnumerator <NStorage.Properties.Property> pi = root.Children;
//prop = pi.Current;
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual("Thumbnail", prop.Name);
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual("\x0005DocumentSummaryInformation", prop.Name);
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual("\x0005SummaryInformation", prop.Name);
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual("Image", prop.Name);
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual(false, pi.MoveNext());
NPOIFSMiniStore miniStore = fs.GetMiniStore();
miniStore.GetBATBlockAndIndex(0);
miniStore.GetBATBlockAndIndex(128);
try
{
miniStore.GetBATBlockAndIndex(256);
Assert.Fail("Should only be two SBATs, but a 3rd was found");
}
//catch (IndexOutOfRangeException)
catch (ArgumentOutOfRangeException)
{
}
for (int i = 0; i < 50; i++)
{
Assert.AreEqual(i + 1, miniStore.GetNextBlock(i));
}
Assert.AreEqual(POIFSConstants.END_OF_CHAIN, miniStore.GetNextBlock(50));
fs.Close();
}
fsA = new NPOIFSFileSystem(_inst.GetFile("BlockSize4096.zvi"));
fsB = new NPOIFSFileSystem(_inst.OpenResourceAsStream("BlockSize4096.zvi"));
foreach (NPOIFSFileSystem fs in new NPOIFSFileSystem[] { fsA, fsB })
{
fs.GetBATBlockAndIndex(0);
fs.GetBATBlockAndIndex(1);
try
{
fs.GetBATBlockAndIndex(1040);
Assert.Fail("Should only be one BAT, but a 2nd was found");
}
//catch (IndexOutOfRangeException)
catch (ArgumentOutOfRangeException)
{
}
Assert.AreEqual(1, fs.GetNextBlock(0));
Assert.AreEqual(2, fs.GetNextBlock(1));
Assert.AreEqual(POIFSConstants.END_OF_CHAIN, fs.GetNextBlock(2));
NPropertyTable props = fs.PropertyTable;
Assert.AreEqual(12, props.StartBlock);
Assert.AreEqual(1, props.CountBlocks);
RootProperty root = props.Root;
Assert.AreEqual("Root Entry", root.Name);
Assert.AreEqual(11564, root.Size);
Assert.AreEqual(0, root.StartBlock);
NStorage.Properties.Property prop;
IEnumerator <NStorage.Properties.Property> pi = root.Children;
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual("Thumbnail", prop.Name);
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual("\x0005DocumentSummaryInformation", prop.Name);
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual("\x0005SummaryInformation", prop.Name);
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual("Image", prop.Name);
pi.MoveNext();
prop = pi.Current;
Assert.AreEqual("Tags", prop.Name);
Assert.AreEqual(false, pi.MoveNext());
NPOIFSMiniStore miniStore = fs.GetMiniStore();
miniStore.GetBATBlockAndIndex(0);
miniStore.GetBATBlockAndIndex(128);
miniStore.GetBATBlockAndIndex(1023);
try
{
miniStore.GetBATBlockAndIndex(1024);
Assert.Fail("Should only be one SBAT, but a 2nd was found");
}
//catch(IndexOutOfRangeException)
catch (ArgumentOutOfRangeException)
{
}
for (int i = 0; i < 50; i++)
{
Assert.AreEqual(i + 1, miniStore.GetNextBlock(i));
}
Assert.AreEqual(POIFSConstants.END_OF_CHAIN, miniStore.GetNextBlock(50));
fs.Close();
}
}
