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🐛Correct UCSD Pascal filesystem on Apple II disks.

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This commit is contained in:
Natalia Portillo
2018-01-06 00:41:14 +00:00
parent 4b359e71f8
commit 38725e5625
6 changed files with 167 additions and 134 deletions
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84
DiscImageChef.Filesystems/UCSDPascal/Super.cs
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@@ -52,65 +52,71 @@ namespace DiscImageChef.Filesystems.UCSDPascal
if(options.TryGetValue("debug", out string debugString)) bool.TryParse(debugString, out debug);
if(device.Info.Sectors < 3) return Errno.InvalidArgument;
multiplier = (uint)(imagePlugin.Info.SectorSize == 256 ? 2 : 1);
// Blocks 0 and 1 are boot code
catalogBlocks = device.ReadSector(2);
catalogBlocks = device.ReadSectors(multiplier * 2, multiplier);
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
// On Apple //, it's little endian
BigEndianBitConverter.IsLittleEndian =
multiplier == 2 ? !BitConverter.IsLittleEndian : BitConverter.IsLittleEndian;
mountedVolEntry.firstBlock = BigEndianBitConverter.ToInt16(catalogBlocks, 0x00);
mountedVolEntry.lastBlock = BigEndianBitConverter.ToInt16(catalogBlocks, 0x02);
mountedVolEntry.entryType = (PascalFileKind)BigEndianBitConverter.ToInt16(catalogBlocks, 0x04);
mountedVolEntry.volumeName = new byte[8];
Array.Copy(catalogBlocks, 0x06, mountedVolEntry.volumeName, 0, 8);
mountedVolEntry.blocks = BigEndianBitConverter.ToInt16(catalogBlocks, 0x0E);
mountedVolEntry.files = BigEndianBitConverter.ToInt16(catalogBlocks, 0x10);
mountedVolEntry.dummy = BigEndianBitConverter.ToInt16(catalogBlocks, 0x12);
mountedVolEntry.lastBoot = BigEndianBitConverter.ToInt16(catalogBlocks, 0x14);
mountedVolEntry.tail = BigEndianBitConverter.ToInt32(catalogBlocks, 0x16);
mountedVolEntry.FirstBlock = BigEndianBitConverter.ToInt16(catalogBlocks, 0x00);
mountedVolEntry.LastBlock = BigEndianBitConverter.ToInt16(catalogBlocks, 0x02);
mountedVolEntry.EntryType = (PascalFileKind)BigEndianBitConverter.ToInt16(catalogBlocks, 0x04);
mountedVolEntry.VolumeName = new byte[8];
Array.Copy(catalogBlocks, 0x06, mountedVolEntry.VolumeName, 0, 8);
mountedVolEntry.Blocks = BigEndianBitConverter.ToInt16(catalogBlocks, 0x0E);
mountedVolEntry.Files = BigEndianBitConverter.ToInt16(catalogBlocks, 0x10);
mountedVolEntry.Dummy = BigEndianBitConverter.ToInt16(catalogBlocks, 0x12);
mountedVolEntry.LastBoot = BigEndianBitConverter.ToInt16(catalogBlocks, 0x14);
mountedVolEntry.Tail = BigEndianBitConverter.ToInt32(catalogBlocks, 0x16);
if(mountedVolEntry.firstBlock != 0 ||
mountedVolEntry.lastBlock <= mountedVolEntry.firstBlock ||
(ulong)mountedVolEntry.lastBlock > device.Info.Sectors - 2 ||
mountedVolEntry.entryType != PascalFileKind.Volume &&
mountedVolEntry.entryType != PascalFileKind.Secure ||
mountedVolEntry.volumeName[0] > 7 ||
mountedVolEntry.blocks < 0 ||
(ulong)mountedVolEntry.blocks != device.Info.Sectors ||
mountedVolEntry.files < 0) return Errno.InvalidArgument;
if(mountedVolEntry.FirstBlock != 0 ||
mountedVolEntry.LastBlock <= mountedVolEntry.FirstBlock ||
(ulong)mountedVolEntry.LastBlock > device.Info.Sectors / multiplier - 2 ||
mountedVolEntry.EntryType != PascalFileKind.Volume &&
mountedVolEntry.EntryType != PascalFileKind.Secure ||
mountedVolEntry.VolumeName[0] > 7 ||
mountedVolEntry.Blocks < 0 ||
(ulong)mountedVolEntry.Blocks != device.Info.Sectors / multiplier ||
mountedVolEntry.Files < 0) return Errno.InvalidArgument;
catalogBlocks = device.ReadSectors(2, (uint)(mountedVolEntry.lastBlock - mountedVolEntry.firstBlock - 2));
int offset = 26;
catalogBlocks = device.ReadSectors(multiplier * 2,
(uint)(mountedVolEntry.LastBlock - mountedVolEntry.FirstBlock - 2) *
multiplier);
int offset = 26;
fileEntries = new List<PascalFileEntry>();
while(offset + 26 < catalogBlocks.Length)
{
PascalFileEntry entry = new PascalFileEntry
{
filename = new byte[16],
firstBlock = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x00),
lastBlock = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x02),
entryType = (PascalFileKind)BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x04),
lastBytes = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x16),
mtime = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x18)
Filename = new byte[16],
FirstBlock = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x00),
LastBlock = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x02),
EntryType = (PascalFileKind)BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x04),
LastBytes = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x16),
ModificationTime = BigEndianBitConverter.ToInt16(catalogBlocks, offset + 0x18)
};
Array.Copy(catalogBlocks, offset + 0x06, entry.filename, 0, 16);
Array.Copy(catalogBlocks, offset + 0x06, entry.Filename, 0, 16);
if(entry.filename[0] <= 15 && entry.filename[0] > 0) fileEntries.Add(entry);
if(entry.Filename[0] <= 15 && entry.Filename[0] > 0) fileEntries.Add(entry);
offset += 26;
}
bootBlocks = device.ReadSectors(0, 2);
bootBlocks = device.ReadSectors(0, 2 * multiplier);
XmlFsType = new FileSystemType
{
Bootable = !ArrayHelpers.ArrayIsNullOrEmpty(bootBlocks),
Clusters = mountedVolEntry.blocks,
Clusters = mountedVolEntry.Blocks,
ClusterSize = (int)device.Info.SectorSize,
Files = mountedVolEntry.files,
Files = mountedVolEntry.Files,
FilesSpecified = true,
Type = "UCSD Pascal",
VolumeName = StringHandlers.PascalToString(mountedVolEntry.volumeName, Encoding)
VolumeName = StringHandlers.PascalToString(mountedVolEntry.VolumeName, Encoding)
};
mounted = true;
@@ -129,17 +135,17 @@ namespace DiscImageChef.Filesystems.UCSDPascal
{
stat = new FileSystemInfo
{
Blocks = mountedVolEntry.blocks,
Blocks = mountedVolEntry.Blocks,
FilenameLength = 16,
Files = (ulong)mountedVolEntry.files,
Files = (ulong)mountedVolEntry.Files,
FreeBlocks = 0,
PluginId = Id,
Type = "UCSD Pascal"
};
stat.FreeBlocks = mountedVolEntry.blocks - (mountedVolEntry.lastBlock - mountedVolEntry.firstBlock);
stat.FreeBlocks = mountedVolEntry.Blocks - (mountedVolEntry.LastBlock - mountedVolEntry.FirstBlock);
foreach(PascalFileEntry entry in fileEntries) stat.FreeBlocks -= entry.lastBlock - entry.firstBlock;
foreach(PascalFileEntry entry in fileEntries) stat.FreeBlocks -= entry.LastBlock - entry.FirstBlock;
return Errno.NotImplemented;
}