public bool Identify(IMediaImage imagePlugin, Partition partition)
{
if (partition.Length < 3)
{
return(false);
}
_multiplier = (uint)(imagePlugin.Info.SectorSize == 256 ? 2 : 1);
// Blocks 0 and 1 are boot code
byte[] volBlock = imagePlugin.ReadSectors((_multiplier * 2) + partition.Start, _multiplier);
// On Apple II, it's little endian
// TODO: Fix
/*BigEndianBitConverter.IsLittleEndian =
* multiplier == 2 ? !BitConverter.IsLittleEndian : BitConverter.IsLittleEndian;*/
var volEntry = new PascalVolumeEntry
{
FirstBlock = BigEndianBitConverter.ToInt16(volBlock, 0x00),
LastBlock = BigEndianBitConverter.ToInt16(volBlock, 0x02),
EntryType = (PascalFileKind)BigEndianBitConverter.ToInt16(volBlock, 0x04),
VolumeName = new byte[8],
Blocks = BigEndianBitConverter.ToInt16(volBlock, 0x0E),
Files = BigEndianBitConverter.ToInt16(volBlock, 0x10),
Dummy = BigEndianBitConverter.ToInt16(volBlock, 0x12),
LastBoot = BigEndianBitConverter.ToInt16(volBlock, 0x14),
Tail = BigEndianBitConverter.ToInt32(volBlock, 0x16)
};
Array.Copy(volBlock, 0x06, volEntry.VolumeName, 0, 8);
AaruConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.firstBlock = {0}", volEntry.FirstBlock);
AaruConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.lastBlock = {0}", volEntry.LastBlock);
AaruConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.entryType = {0}", volEntry.EntryType);
AaruConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.volumeName = {0}", volEntry.VolumeName);
AaruConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.blocks = {0}", volEntry.Blocks);
AaruConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.files = {0}", volEntry.Files);
AaruConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.dummy = {0}", volEntry.Dummy);
AaruConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.lastBoot = {0}", volEntry.LastBoot);
AaruConsole.DebugWriteLine("UCSD Pascal Plugin", "volEntry.tail = {0}", volEntry.Tail);
// First block is always 0 (even is it's sector 2)
if (volEntry.FirstBlock != 0)
{
return(false);
}
// Last volume record block must be after first block, and before end of device
if (volEntry.LastBlock <= volEntry.FirstBlock ||
(ulong)volEntry.LastBlock > (imagePlugin.Info.Sectors / _multiplier) - 2)
{
return(false);
}
// Volume record entry type must be volume or secure
if (volEntry.EntryType != PascalFileKind.Volume &&
volEntry.EntryType != PascalFileKind.Secure)
{
return(false);
}
// Volume name is max 7 characters
if (volEntry.VolumeName[0] > 7)
{
return(false);
}
// Volume blocks is equal to volume sectors
if (volEntry.Blocks < 0 ||
(ulong)volEntry.Blocks != imagePlugin.Info.Sectors / _multiplier)
{
return(false);
}
// There can be not less than zero files
return(volEntry.Files >= 0);
}
public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information,
Encoding encoding)
{
Encoding = encoding ?? new Apple2();
var sbInformation = new StringBuilder();
information = "";
_multiplier = (uint)(imagePlugin.Info.SectorSize == 256 ? 2 : 1);
if (imagePlugin.Info.Sectors < 3)
{
return;
}
// Blocks 0 and 1 are boot code
byte[] volBlock = imagePlugin.ReadSectors((_multiplier * 2) + partition.Start, _multiplier);
// On Apple //, it's little endian
// TODO: Fix
//BigEndianBitConverter.IsLittleEndian =
// multiplier == 2 ? !BitConverter.IsLittleEndian : BitConverter.IsLittleEndian;
var volEntry = new PascalVolumeEntry
{
FirstBlock = BigEndianBitConverter.ToInt16(volBlock, 0x00),
LastBlock = BigEndianBitConverter.ToInt16(volBlock, 0x02),
EntryType = (PascalFileKind)BigEndianBitConverter.ToInt16(volBlock, 0x04),
VolumeName = new byte[8],
Blocks = BigEndianBitConverter.ToInt16(volBlock, 0x0E),
Files = BigEndianBitConverter.ToInt16(volBlock, 0x10),
Dummy = BigEndianBitConverter.ToInt16(volBlock, 0x12),
LastBoot = BigEndianBitConverter.ToInt16(volBlock, 0x14),
Tail = BigEndianBitConverter.ToInt32(volBlock, 0x16)
};
Array.Copy(volBlock, 0x06, volEntry.VolumeName, 0, 8);
// First block is always 0 (even is it's sector 2)
if (volEntry.FirstBlock != 0)
{
return;
}
// Last volume record block must be after first block, and before end of device
if (volEntry.LastBlock <= volEntry.FirstBlock ||
(ulong)volEntry.LastBlock > (imagePlugin.Info.Sectors / _multiplier) - 2)
{
return;
}
// Volume record entry type must be volume or secure
if (volEntry.EntryType != PascalFileKind.Volume &&
volEntry.EntryType != PascalFileKind.Secure)
{
return;
}
// Volume name is max 7 characters
if (volEntry.VolumeName[0] > 7)
{
return;
}
// Volume blocks is equal to volume sectors
if (volEntry.Blocks < 0 ||
(ulong)volEntry.Blocks != imagePlugin.Info.Sectors / _multiplier)
{
return;
}
// There can be not less than zero files
if (volEntry.Files < 0)
{
return;
}
sbInformation.AppendFormat("Volume record spans from block {0} to block {1}", volEntry.FirstBlock,
volEntry.LastBlock).AppendLine();
sbInformation.
AppendFormat("Volume name: {0}", StringHandlers.PascalToString(volEntry.VolumeName, Encoding)).
AppendLine();
sbInformation.AppendFormat("Volume has {0} blocks", volEntry.Blocks).AppendLine();
sbInformation.AppendFormat("Volume has {0} files", volEntry.Files).AppendLine();
sbInformation.
AppendFormat("Volume last booted at {0}", DateHandlers.UcsdPascalToDateTime(volEntry.LastBoot)).
AppendLine();
information = sbInformation.ToString();
XmlFsType = new FileSystemType
{
Bootable = !ArrayHelpers.ArrayIsNullOrEmpty(imagePlugin.ReadSectors(partition.Start, _multiplier * 2)),
Clusters = (ulong)volEntry.Blocks,
ClusterSize = imagePlugin.Info.SectorSize,
Files = (ulong)volEntry.Files,
FilesSpecified = true,
Type = "UCSD Pascal",
VolumeName = StringHandlers.PascalToString(volEntry.VolumeName, Encoding)
};
}
