/// <summary>
/// Initializes a new instance of the <see cref="Directory"/> class
/// from an array of bytes.
/// </summary>
/// <param name="buffer">Array of bytes containing the directory information</param>
/// <param name="diskFormatType">Disk Format to use when interpreting the Array of bytes</param>
public Directory(byte[] buffer, DiskFormatType diskFormatType)
{
this.FormatType = diskFormatType;
this.entries = new List <DirectoryEntry>();
int offset = 0;
switch (diskFormatType)
{
case DiskFormatType.DragonDosFormat:
List <byte[]> entries = new List <byte[]>();
while (offset < buffer.Length)
{
if ((buffer[offset] & 0x08) == 0x08)
{
break;
}
entries.Add(buffer.Subset(offset, 0x19));
offset += 19;
if ((offset + 6) % 100 == 0)
{
offset += 6;
}
}
byte[][] blocks = entries.ToArray();
foreach (byte[] block in blocks)
{
DirectoryEntry entry = new DirectoryEntry(block, this.FormatType);
this.entries.Add(entry);
if (entry.NextDirectoryEntry != 0)
{
entry.PutDragonDosExtBytes(blocks[entry.NextDirectoryEntry]);
}
}
break;
case DiskFormatType.OS9Format:
case DiskFormatType.RSDOSFormat:
while (offset < buffer.Length)
{
this.entries.Add(new DirectoryEntry(buffer.Subset(offset, 32), this.FormatType));
offset += 32;
}
break;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="DirectoryEntry"/> class
/// from an Array of bytes.
/// </summary>
/// <param name="directoryEntryBytes">Array of bytes containing directory entry information</param>
/// <param name="diskFormatType">Type of Disk Format</param>
public DirectoryEntry(byte[] directoryEntryBytes, DiskFormatType diskFormatType)
{
this.FormatType = diskFormatType;
string filename, ext;
switch (diskFormatType)
{
case DiskFormatType.OS9Format:
if (directoryEntryBytes[0] == 0x00)
{
this.Deleted = true;
this.Filename = "?" + Util.GetString(directoryEntryBytes.Subset(1, 29));
}
else
{
this.Deleted = false;
this.Filename = Util.GetString(directoryEntryBytes.Subset(0, 29));
}
this.LSN = Util.Int24(directoryEntryBytes.Subset(29, 3));
this.SegmentList = new FileSegment[48];
break;
case DiskFormatType.DragonDosFormat:
this.AttrByte = directoryEntryBytes[0];
this.Deleted = (directoryEntryBytes[0] & 0x80) == 0x80;
this.Protected = (directoryEntryBytes[0] & 0x02) == 0x02;
filename = Util.GetString(directoryEntryBytes.Subset(1, 8));
ext = Util.GetString(directoryEntryBytes.Subset(9, 3));
this.Filename = string.Format("{0}.{1}", filename, ext);
this.SectorAllocationBlocks = new SectorAllocationBlock[11];
for (int i = 0; i < 4; i++)
{
this.SectorAllocationBlocks[i] = new SectorAllocationBlock(directoryEntryBytes.Subset(12 + (i * 3), 3));
}
if ((directoryEntryBytes[0] & 0x20) == 0x20)
{
this.NextDirectoryEntry = directoryEntryBytes[0x18];
}
else
{
this.BytesUsedInLastSector = directoryEntryBytes[0x18];
}
int size = 0;
for (int i = 0; i < 11; i++)
{
if (this.SectorAllocationBlocks[i].Sectors != 0)
{
size += this.SectorAllocationBlocks[i].Sectors * 256;
}
}
this.Size = (uint)size;
if (this.BytesUsedInLastSector != 0)
{
size -= 0x100 - this.BytesUsedInLastSector;
}
break;
case DiskFormatType.RSDOSFormat:
if (directoryEntryBytes[0] == 0x00)
{
this.Deleted = true;
filename = "?" + Util.GetString(directoryEntryBytes.Subset(1, 8)).Trim();
}
else
{
Deleted = false;
filename = Util.GetString(directoryEntryBytes.Subset(0, 8)).Trim();
}
ext = Util.GetString(directoryEntryBytes.Subset(8, 3)).Trim();
this.Filename = string.Format("{0}.{1}", filename, ext);
this.FileType = directoryEntryBytes[0x0b];
this.AsciiFlag = directoryEntryBytes[0x0c];
this.FirstGranule = directoryEntryBytes[0x0d];
this.LastSectorBytesMSB = directoryEntryBytes[0x0e];
this.LastSectorBytesLSB = directoryEntryBytes[0x0f];
break;
}
}
