public BATBlockAndIndex(int index, BATBlock block)
{
this.index = index;
this.block = block;
}
/// <summary>
/// Create an array of XBATBlocks from an array of int block
/// allocation table entries
/// </summary>
/// <param name="entries">the array of int entries</param>
/// <param name="startBlock">the start block of the array of XBAT blocks</param>
/// <returns>the newly created array of BATBlocks</returns>
public static BATBlock[] CreateXBATBlocks(POIFSBigBlockSize bigBlockSize, int[] entries,
int startBlock)
{
int block_count =
CalculateXBATStorageRequirements(entries.Length);
BATBlock[] blocks = new BATBlock[block_count];
int index = 0;
int remaining = entries.Length;
if (block_count != 0)
{
for (int j = 0; j < entries.Length; j += _entries_per_xbat_block)
{
blocks[index++] =
new BATBlock(bigBlockSize, entries, j,
(remaining > _entries_per_xbat_block)
? j + _entries_per_xbat_block
: entries.Length);
remaining -= _entries_per_xbat_block;
}
for (index = 0; index < blocks.Length - 1; index++)
{
blocks[index].SetXBATChain(bigBlockSize, startBlock + index + 1);
}
blocks[index].SetXBATChain(bigBlockSize, POIFSConstants.END_OF_CHAIN);
}
return blocks;
}
/// <summary>
/// Create an array of BATBlocks from an array of int block
/// allocation table entries
/// </summary>
/// <param name="entries">the array of int entries</param>
/// <returns>the newly created array of BATBlocks</returns>
public static BATBlock[] CreateBATBlocks(POIFSBigBlockSize bigBlockSize, int[] entries)
{
int block_count = CalculateStorageRequirements(entries.Length);
BATBlock[] blocks = new BATBlock[block_count];
int index = 0;
int remaining = entries.Length;
for (int j = 0; j < entries.Length; j += _entries_per_block)
{
blocks[index++] = new BATBlock(bigBlockSize, entries, j,
(remaining > _entries_per_block)
? j + _entries_per_block
: entries.Length);
remaining -= _entries_per_block;
}
return blocks;
}
///**
// * Creates a single BATBlock, with all the values set to empty.
// */
public static BATBlock CreateEmptyBATBlock(POIFSBigBlockSize bigBlockSize, bool isXBAT)
{
BATBlock block = new BATBlock(bigBlockSize);
if (isXBAT)
{
block.SetXBATChain(bigBlockSize, POIFSConstants.END_OF_CHAIN);
}
return block;
}
//public static BATBlock CreateBATBlock(POIFSBigBlockSize bigBlockSize, byte[] data)
public static BATBlock CreateBATBlock(POIFSBigBlockSize bigBlockSize, ByteBuffer data)
{
// Create an empty block
BATBlock block = new BATBlock(bigBlockSize);
// Fill it
byte[] buffer = new byte[LittleEndianConsts.INT_SIZE];
//int index = 0;
for (int i = 0; i < block._values.Length; i++)
{
//data.Read(buffer, 0, buffer.Length);
//for (int j = 0; j < buffer.Length; j++, index++)
// buffer[j] = data[index];
data.Read(buffer);
block._values[i] = LittleEndian.GetInt(buffer);
}
block.RecomputeFree();
// All done
return block;
}
/**
* Create a single BATBlock from the byte buffer, which must hold at least
* one big block of data to be read.
*/
public static BATBlock CreateBATBlock(POIFSBigBlockSize bigBlockSize, BinaryReader data)
{
// Create an empty block
BATBlock block = new BATBlock(bigBlockSize);
// Fill it
byte[] buffer = new byte[LittleEndianConsts.INT_SIZE];
for (int i = 0; i < block._values.Length; i++)
{
data.Read(buffer,0,buffer.Length);
block._values[i] = LittleEndian.GetInt(buffer);
}
block.RecomputeFree();
// All done
return block;
}
