/// <summary>
/// Initializes a new instance of the <see cref="ArchiveFileAllocationTable"/> class.
/// </summary>
/// <param name="parent">An <see cref="ArchiveFile"/> object.</param>
internal ArchiveFileAllocationTable(ArchiveFile parent)
{
m_parent = parent;
m_dataBlockPointers = new List <ArchiveDataBlockPointer>();
m_fixedTableRegion = new FixedTableRegion(this);
m_variableTableRegion = new VariableTableRegion(this);
if (m_parent.FileData.Length == 0)
{
// File is brand new.
m_fileStartTime = TimeTag.MinValue;
m_fileEndTime = TimeTag.MinValue;
m_dataBlockSize = m_parent.DataBlockSize;
m_dataBlockCount = ArchiveFile.MaximumDataBlocks(m_parent.FileSize, m_parent.DataBlockSize);
for (int i = 0; i < m_dataBlockCount; i++)
{
m_dataBlockPointers.Add(new ArchiveDataBlockPointer(m_parent, i));
}
}
else
{
// Existing file, read table regions:
// Seek to beginning of fixed table region
m_parent.FileData.Seek(-m_fixedTableRegion.BinaryLength, SeekOrigin.End);
// Parse fixed table region
m_fixedTableRegion.ParseBinaryImageFromStream(m_parent.FileData);
// Seek to beginning of variable table region (above fixed from bottom of file)
m_parent.FileData.Seek(-(m_fixedTableRegion.BinaryLength + m_variableTableRegion.BinaryLength), SeekOrigin.End);
// Parse variable table region
m_variableTableRegion.ParseBinaryImageFromStream(m_parent.FileData);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ArchiveFileAllocationTable"/> class.
/// </summary>
/// <param name="parent">An <see cref="ArchiveFile"/> object.</param>
internal ArchiveFileAllocationTable(ArchiveFile parent)
{
m_parent = parent;
m_dataBlockPointers = new List<ArchiveDataBlockPointer>();
m_fixedTableRegion = new FixedTableRegion(this);
m_variableTableRegion = new VariableTableRegion(this);
if (m_parent.FileData.Length == 0)
{
// File is brand new.
m_fileStartTime = TimeTag.MinValue;
m_fileEndTime = TimeTag.MinValue;
m_dataBlockSize = m_parent.DataBlockSize;
m_dataBlockCount = ArchiveFile.MaximumDataBlocks(m_parent.FileSize, m_parent.DataBlockSize);
for (int i = 0; i < m_dataBlockCount; i++)
{
m_dataBlockPointers.Add(new ArchiveDataBlockPointer(m_parent, i));
}
}
else
{
// Existing file, read table regions:
// Seek to beginning of fixed table region
m_parent.FileData.Seek(-m_fixedTableRegion.BinaryLength, SeekOrigin.End);
// Parse fixed table region
m_fixedTableRegion.ParseBinaryImageFromStream(m_parent.FileData);
// Seek to beginning of variable table region (above fixed from bottom of file)
m_parent.FileData.Seek(-(m_fixedTableRegion.BinaryLength + m_variableTableRegion.BinaryLength), SeekOrigin.End);
// Parse variable table region
m_variableTableRegion.ParseBinaryImageFromStream(m_parent.FileData);
}
}
