public Errno Mount(IMediaImage imagePlugin, Partition partition, Encoding encoding,
Dictionary <string, string> options, string @namespace)
{
Encoding = encoding ?? Encoding.GetEncoding(1252);
byte[] vdMagic = new byte[5]; // Volume Descriptor magic "CD001"
byte[] hsMagic = new byte[5]; // Volume Descriptor magic "CDROM"
options ??= GetDefaultOptions();
if (options.TryGetValue("debug", out string debugString))
{
bool.TryParse(debugString, out _debug);
}
if (options.TryGetValue("use_path_table", out string usePathTableString))
{
bool.TryParse(usePathTableString, out _usePathTable);
}
if (options.TryGetValue("use_trans_tbl", out string useTransTblString))
{
bool.TryParse(useTransTblString, out _useTransTbl);
}
if (options.TryGetValue("use_evd", out string useEvdString))
{
bool.TryParse(useEvdString, out _useEvd);
}
// Default namespace
@namespace ??= "joliet";
switch (@namespace.ToLowerInvariant())
{
case "normal":
_namespace = Namespace.Normal;
break;
case "vms":
_namespace = Namespace.Vms;
break;
case "joliet":
_namespace = Namespace.Joliet;
break;
case "rrip":
_namespace = Namespace.Rrip;
break;
case "romeo":
_namespace = Namespace.Romeo;
break;
default: return(Errno.InvalidArgument);
}
PrimaryVolumeDescriptor?pvd = null;
PrimaryVolumeDescriptor?jolietvd = null;
BootRecord?bvd = null;
HighSierraPrimaryVolumeDescriptor?hsvd = null;
FileStructureVolumeDescriptor? fsvd = null;
// ISO9660 is designed for 2048 bytes/sector devices
if (imagePlugin.Info.SectorSize < 2048)
{
return(Errno.InvalidArgument);
}
// ISO9660 Primary Volume Descriptor starts at sector 16, so that's minimal size.
if (partition.End < 16)
{
return(Errno.InvalidArgument);
}
ulong counter = 0;
byte[] vdSector = imagePlugin.ReadSector(16 + counter + partition.Start);
int xaOff = vdSector.Length == 2336 ? 8 : 0;
Array.Copy(vdSector, 0x009 + xaOff, hsMagic, 0, 5);
_highSierra = Encoding.GetString(hsMagic) == HIGH_SIERRA_MAGIC;
int hsOff = 0;
if (_highSierra)
{
hsOff = 8;
}
_cdi = false;
List <ulong> bvdSectors = new List <ulong>();
List <ulong> pvdSectors = new List <ulong>();
List <ulong> svdSectors = new List <ulong>();
List <ulong> evdSectors = new List <ulong>();
List <ulong> vpdSectors = new List <ulong>();
while (true)
{
AaruConsole.DebugWriteLine("ISO9660 plugin", "Processing VD loop no. {0}", counter);
// Seek to Volume Descriptor
AaruConsole.DebugWriteLine("ISO9660 plugin", "Reading sector {0}", 16 + counter + partition.Start);
byte[] vdSectorTmp = imagePlugin.ReadSector(16 + counter + partition.Start);
vdSector = new byte[vdSectorTmp.Length - xaOff];
Array.Copy(vdSectorTmp, xaOff, vdSector, 0, vdSector.Length);
byte vdType = vdSector[0 + hsOff]; // Volume Descriptor Type, should be 1 or 2.
AaruConsole.DebugWriteLine("ISO9660 plugin", "VDType = {0}", vdType);
if (vdType == 255) // Supposedly we are in the PVD.
{
if (counter == 0)
{
return(Errno.InvalidArgument);
}
break;
}
Array.Copy(vdSector, 0x001, vdMagic, 0, 5);
Array.Copy(vdSector, 0x009, hsMagic, 0, 5);
if (Encoding.GetString(vdMagic) != ISO_MAGIC &&
Encoding.GetString(hsMagic) != HIGH_SIERRA_MAGIC &&
Encoding.GetString(vdMagic) != CDI_MAGIC
) // Recognized, it is an ISO9660, now check for rest of data.
{
if (counter == 0)
{
return(Errno.InvalidArgument);
}
break;
}
_cdi |= Encoding.GetString(vdMagic) == CDI_MAGIC;
switch (vdType)
{
case 0:
{
if (_debug)
{
bvdSectors.Add(16 + counter + partition.Start);
}
break;
}
case 1:
{
if (_highSierra)
{
hsvd = Marshal.
ByteArrayToStructureLittleEndian <HighSierraPrimaryVolumeDescriptor>(vdSector);
}
else if (_cdi)
{
fsvd = Marshal.ByteArrayToStructureBigEndian <FileStructureVolumeDescriptor>(vdSector);
}
else
{
pvd = Marshal.ByteArrayToStructureLittleEndian <PrimaryVolumeDescriptor>(vdSector);
}
if (_debug)
{
pvdSectors.Add(16 + counter + partition.Start);
}
break;
}
case 2:
{
PrimaryVolumeDescriptor svd =
Marshal.ByteArrayToStructureLittleEndian <PrimaryVolumeDescriptor>(vdSector);
// TODO: Other escape sequences
// Check if this is Joliet
if (svd.version == 1)
{
if (svd.escape_sequences[0] == '%' &&
svd.escape_sequences[1] == '/')
{
if (svd.escape_sequences[2] == '@' ||
svd.escape_sequences[2] == 'C' ||
svd.escape_sequences[2] == 'E')
{
jolietvd = svd;
}
else
{
AaruConsole.DebugWriteLine("ISO9660 plugin",
"Found unknown supplementary volume descriptor");
}
}
if (_debug)
{
svdSectors.Add(16 + counter + partition.Start);
}
}
else
{
if (_debug)
{
evdSectors.Add(16 + counter + partition.Start);
}
if (_useEvd)
{
// Basically until escape sequences are implemented, let the user chose the encoding.
// This is the same as user choosing Romeo namespace, but using the EVD instead of the PVD
_namespace = Namespace.Romeo;
pvd = svd;
}
}
break;
}
case 3:
{
if (_debug)
{
vpdSectors.Add(16 + counter + partition.Start);
}
break;
}
}
counter++;
}
DecodedVolumeDescriptor decodedVd;
var decodedJolietVd = new DecodedVolumeDescriptor();
XmlFsType = new FileSystemType();
if (pvd == null &&
hsvd == null &&
fsvd == null)
{
AaruConsole.ErrorWriteLine("ERROR: Could not find primary volume descriptor");
return(Errno.InvalidArgument);
}
if (_highSierra)
{
decodedVd = DecodeVolumeDescriptor(hsvd.Value);
}
else if (_cdi)
{
decodedVd = DecodeVolumeDescriptor(fsvd.Value);
}
else
{
decodedVd = DecodeVolumeDescriptor(pvd.Value);
}
if (jolietvd != null)
{
decodedJolietVd = DecodeJolietDescriptor(jolietvd.Value);
}
if (_namespace != Namespace.Romeo)
{
Encoding = Encoding.ASCII;
}
string fsFormat;
byte[] pathTableData;
uint pathTableMsbLocation;
uint pathTableLsbLocation = 0; // Initialize to 0 as ignored in CD-i
_image = imagePlugin;
if (_highSierra)
{
pathTableData = ReadSingleExtent(0, hsvd.Value.path_table_size,
Swapping.Swap(hsvd.Value.mandatory_path_table_msb));
fsFormat = "High Sierra Format";
pathTableMsbLocation = hsvd.Value.mandatory_path_table_msb;
pathTableLsbLocation = hsvd.Value.mandatory_path_table_lsb;
}
else if (_cdi)
{
pathTableData = ReadSingleExtent(0, fsvd.Value.path_table_size, fsvd.Value.path_table_addr);
fsFormat = "CD-i";
pathTableMsbLocation = fsvd.Value.path_table_addr;
// TODO: Until escape sequences are implemented this is the default CD-i encoding.
Encoding = Encoding.GetEncoding("iso8859-1");
}
else
{
pathTableData =
ReadSingleExtent(0, pvd.Value.path_table_size, Swapping.Swap(pvd.Value.type_m_path_table));
fsFormat = "ISO9660";
pathTableMsbLocation = pvd.Value.type_m_path_table;
pathTableLsbLocation = pvd.Value.type_l_path_table;
}
_pathTable = _highSierra ? DecodeHighSierraPathTable(pathTableData) : DecodePathTable(pathTableData);
// High Sierra and CD-i do not support Joliet or RRIP
if ((_highSierra || _cdi) &&
_namespace != Namespace.Normal &&
_namespace != Namespace.Vms)
{
_namespace = Namespace.Normal;
}
if (jolietvd is null &&
_namespace == Namespace.Joliet)
{
_namespace = Namespace.Normal;
}
uint rootLocation;
uint rootSize;
byte rootXattrLength = 0;
if (!_cdi)
{
rootLocation = _highSierra ? hsvd.Value.root_directory_record.extent
: pvd.Value.root_directory_record.extent;
rootXattrLength = _highSierra ? hsvd.Value.root_directory_record.xattr_len
: pvd.Value.root_directory_record.xattr_len;
rootSize = _highSierra ? hsvd.Value.root_directory_record.size : pvd.Value.root_directory_record.size;
if (pathTableData.Length > 1 &&
rootLocation != _pathTable[0].Extent)
{
AaruConsole.DebugWriteLine("ISO9660 plugin",
"Path table and PVD do not point to the same location for the root directory!");
byte[] firstRootSector = ReadSector(rootLocation);
bool pvdWrongRoot = false;
if (_highSierra)
{
HighSierraDirectoryRecord rootEntry =
Marshal.ByteArrayToStructureLittleEndian <HighSierraDirectoryRecord>(firstRootSector);
if (rootEntry.extent != rootLocation)
{
pvdWrongRoot = true;
}
}
else
{
DirectoryRecord rootEntry =
Marshal.ByteArrayToStructureLittleEndian <DirectoryRecord>(firstRootSector);
if (rootEntry.extent != rootLocation)
{
pvdWrongRoot = true;
}
}
if (pvdWrongRoot)
{
AaruConsole.DebugWriteLine("ISO9660 plugin",
"PVD does not point to correct root directory, checking path table...");
bool pathTableWrongRoot = false;
rootLocation = _pathTable[0].Extent;
firstRootSector = ReadSector(_pathTable[0].Extent);
if (_highSierra)
{
HighSierraDirectoryRecord rootEntry =
Marshal.ByteArrayToStructureLittleEndian <HighSierraDirectoryRecord>(firstRootSector);
if (rootEntry.extent != rootLocation)
{
pathTableWrongRoot = true;
}
}
else
{
DirectoryRecord rootEntry =
Marshal.ByteArrayToStructureLittleEndian <DirectoryRecord>(firstRootSector);
if (rootEntry.extent != rootLocation)
{
pathTableWrongRoot = true;
}
}
if (pathTableWrongRoot)
{
AaruConsole.ErrorWriteLine("Cannot find root directory...");
return(Errno.InvalidArgument);
}
_usePathTable = true;
}
}
}
else
{
rootLocation = _pathTable[0].Extent;
byte[] firstRootSector = ReadSector(rootLocation);
CdiDirectoryRecord rootEntry =
Marshal.ByteArrayToStructureBigEndian <CdiDirectoryRecord>(firstRootSector);
rootSize = rootEntry.size;
_usePathTable = _usePathTable || _pathTable.Length == 1;
_useTransTbl = false;
}
// In case the path table is incomplete
if (_usePathTable && pathTableData.Length == 1)
{
_usePathTable = false;
}
if (_usePathTable && !_cdi)
{
rootLocation = _pathTable[0].Extent;
byte[] firstRootSector = ReadSector(rootLocation);
if (_highSierra)
{
HighSierraDirectoryRecord rootEntry =
Marshal.ByteArrayToStructureLittleEndian <HighSierraDirectoryRecord>(firstRootSector);
rootSize = rootEntry.size;
}
else
{
DirectoryRecord rootEntry =
Marshal.ByteArrayToStructureLittleEndian <DirectoryRecord>(firstRootSector);
rootSize = rootEntry.size;
}
rootXattrLength = _pathTable[0].XattrLength;
}
try
{
_ = ReadSingleExtent(0, rootSize, rootLocation);
}
catch
{
return(Errno.InvalidArgument);
}
byte[] ipbinSector = ReadSector(partition.Start);
CD.IPBin? segaCd = CD.DecodeIPBin(ipbinSector);
Saturn.IPBin? saturn = Saturn.DecodeIPBin(ipbinSector);
Dreamcast.IPBin?dreamcast = Dreamcast.DecodeIPBin(ipbinSector);
if (_namespace == Namespace.Joliet ||
_namespace == Namespace.Rrip)
{
_usePathTable = false;
_useTransTbl = false;
}
// Cannot traverse path table if we substitute the names for the ones in TRANS.TBL
if (_useTransTbl)
{
_usePathTable = false;
}
if (_namespace != Namespace.Joliet)
{
_rootDirectoryCache = _cdi
? DecodeCdiDirectory(rootLocation, rootSize, rootXattrLength)
: _highSierra
? DecodeHighSierraDirectory(rootLocation, rootSize, rootXattrLength)
: DecodeIsoDirectory(rootLocation, rootSize, rootXattrLength);
}
XmlFsType.Type = fsFormat;
if (jolietvd != null &&
(_namespace == Namespace.Joliet || _namespace == Namespace.Rrip))
{
rootLocation = jolietvd.Value.root_directory_record.extent;
rootXattrLength = jolietvd.Value.root_directory_record.xattr_len;
rootSize = jolietvd.Value.root_directory_record.size;
_joliet = true;
_rootDirectoryCache = DecodeIsoDirectory(rootLocation, rootSize, rootXattrLength);
XmlFsType.VolumeName = decodedJolietVd.VolumeIdentifier;
if (string.IsNullOrEmpty(decodedJolietVd.SystemIdentifier) ||
decodedVd.SystemIdentifier.Length > decodedJolietVd.SystemIdentifier.Length)
{
XmlFsType.SystemIdentifier = decodedVd.SystemIdentifier;
}
else
{
XmlFsType.SystemIdentifier = string.IsNullOrEmpty(decodedJolietVd.SystemIdentifier) ? null
: decodedJolietVd.SystemIdentifier;
}
if (string.IsNullOrEmpty(decodedJolietVd.VolumeSetIdentifier) ||
decodedVd.VolumeSetIdentifier.Length > decodedJolietVd.VolumeSetIdentifier.Length)
{
XmlFsType.VolumeSetIdentifier = decodedVd.VolumeSetIdentifier;
}
else
{
XmlFsType.VolumeSetIdentifier = string.IsNullOrEmpty(decodedJolietVd.VolumeSetIdentifier) ? null
: decodedJolietVd.VolumeSetIdentifier;
}
if (string.IsNullOrEmpty(decodedJolietVd.PublisherIdentifier) ||
decodedVd.PublisherIdentifier.Length > decodedJolietVd.PublisherIdentifier.Length)
{
XmlFsType.PublisherIdentifier = decodedVd.PublisherIdentifier;
}
else
{
XmlFsType.PublisherIdentifier = string.IsNullOrEmpty(decodedJolietVd.PublisherIdentifier) ? null
: decodedJolietVd.PublisherIdentifier;
}
if (string.IsNullOrEmpty(decodedJolietVd.DataPreparerIdentifier) ||
decodedVd.DataPreparerIdentifier.Length > decodedJolietVd.DataPreparerIdentifier.Length)
{
XmlFsType.DataPreparerIdentifier = decodedVd.DataPreparerIdentifier;
}
else
{
XmlFsType.DataPreparerIdentifier = string.IsNullOrEmpty(decodedJolietVd.DataPreparerIdentifier)
? null : decodedJolietVd.DataPreparerIdentifier;
}
if (string.IsNullOrEmpty(decodedJolietVd.ApplicationIdentifier) ||
decodedVd.ApplicationIdentifier.Length > decodedJolietVd.ApplicationIdentifier.Length)
{
XmlFsType.ApplicationIdentifier = decodedVd.ApplicationIdentifier;
}
else
{
XmlFsType.ApplicationIdentifier = string.IsNullOrEmpty(decodedJolietVd.ApplicationIdentifier) ? null
: decodedJolietVd.ApplicationIdentifier;
}
XmlFsType.CreationDate = decodedJolietVd.CreationTime;
XmlFsType.CreationDateSpecified = true;
if (decodedJolietVd.HasModificationTime)
{
XmlFsType.ModificationDate = decodedJolietVd.ModificationTime;
XmlFsType.ModificationDateSpecified = true;
}
if (decodedJolietVd.HasExpirationTime)
{
XmlFsType.ExpirationDate = decodedJolietVd.ExpirationTime;
XmlFsType.ExpirationDateSpecified = true;
}
if (decodedJolietVd.HasEffectiveTime)
{
XmlFsType.EffectiveDate = decodedJolietVd.EffectiveTime;
XmlFsType.EffectiveDateSpecified = true;
}
decodedVd = decodedJolietVd;
}
else
{
XmlFsType.SystemIdentifier = decodedVd.SystemIdentifier;
XmlFsType.VolumeName = decodedVd.VolumeIdentifier;
XmlFsType.VolumeSetIdentifier = decodedVd.VolumeSetIdentifier;
XmlFsType.PublisherIdentifier = decodedVd.PublisherIdentifier;
XmlFsType.DataPreparerIdentifier = decodedVd.DataPreparerIdentifier;
XmlFsType.ApplicationIdentifier = decodedVd.ApplicationIdentifier;
XmlFsType.CreationDate = decodedVd.CreationTime;
XmlFsType.CreationDateSpecified = true;
if (decodedVd.HasModificationTime)
{
XmlFsType.ModificationDate = decodedVd.ModificationTime;
XmlFsType.ModificationDateSpecified = true;
}
if (decodedVd.HasExpirationTime)
{
XmlFsType.ExpirationDate = decodedVd.ExpirationTime;
XmlFsType.ExpirationDateSpecified = true;
}
if (decodedVd.HasEffectiveTime)
{
XmlFsType.EffectiveDate = decodedVd.EffectiveTime;
XmlFsType.EffectiveDateSpecified = true;
}
}
if (_debug)
{
_rootDirectoryCache.Add("$", new DecodedDirectoryEntry
{
Extents = new List <(uint extent, uint size)>
{
(rootLocation, rootSize)
},
Filename = "$",
Size = rootSize,
Timestamp = decodedVd.CreationTime
});
public Errno Mount(IMediaImage imagePlugin, Partition partition, Encoding encoding,
Dictionary <string, string> options, string @namespace)
{
Encoding = encoding ?? Encoding.GetEncoding(1252);
byte[] vdMagic = new byte[5]; // Volume Descriptor magic "CD001"
byte[] hsMagic = new byte[5]; // Volume Descriptor magic "CDROM"
if (options == null)
{
options = GetDefaultOptions();
}
if (options.TryGetValue("debug", out string debugString))
{
bool.TryParse(debugString, out debug);
}
if (options.TryGetValue("use_path_table", out string usePathTableString))
{
bool.TryParse(usePathTableString, out usePathTable);
}
if (options.TryGetValue("use_trans_tbl", out string useTransTblString))
{
bool.TryParse(useTransTblString, out useTransTbl);
}
if (options.TryGetValue("use_evd", out string useEvdString))
{
bool.TryParse(useEvdString, out useEvd);
}
// Default namespace
if (@namespace is null)
{
@namespace = "joliet";
}
switch (@namespace.ToLowerInvariant())
{
case "normal":
this.@namespace = Namespace.Normal;
break;
case "vms":
this.@namespace = Namespace.Vms;
break;
case "joliet":
this.@namespace = Namespace.Joliet;
break;
case "rrip":
this.@namespace = Namespace.Rrip;
break;
case "romeo":
this.@namespace = Namespace.Romeo;
break;
default: return(Errno.InvalidArgument);
}
PrimaryVolumeDescriptor?pvd = null;
PrimaryVolumeDescriptor?jolietvd = null;
BootRecord?bvd = null;
HighSierraPrimaryVolumeDescriptor?hsvd = null;
FileStructureVolumeDescriptor? fsvd = null;
// ISO9660 is designed for 2048 bytes/sector devices
if (imagePlugin.Info.SectorSize < 2048)
{
return(Errno.InvalidArgument);
}
// ISO9660 Primary Volume Descriptor starts at sector 16, so that's minimal size.
if (partition.End < 16)
{
return(Errno.InvalidArgument);
}
ulong counter = 0;
byte[] vdSector = imagePlugin.ReadSector(16 + counter + partition.Start);
int xaOff = vdSector.Length == 2336 ? 8 : 0;
Array.Copy(vdSector, 0x009 + xaOff, hsMagic, 0, 5);
highSierra = Encoding.GetString(hsMagic) == HIGH_SIERRA_MAGIC;
int hsOff = 0;
if (highSierra)
{
hsOff = 8;
}
cdi = false;
List <ulong> bvdSectors = new List <ulong>();
List <ulong> pvdSectors = new List <ulong>();
List <ulong> svdSectors = new List <ulong>();
List <ulong> evdSectors = new List <ulong>();
List <ulong> vpdSectors = new List <ulong>();
while (true)
{
DicConsole.DebugWriteLine("ISO9660 plugin", "Processing VD loop no. {0}", counter);
// Seek to Volume Descriptor
DicConsole.DebugWriteLine("ISO9660 plugin", "Reading sector {0}", 16 + counter + partition.Start);
byte[] vdSectorTmp = imagePlugin.ReadSector(16 + counter + partition.Start);
vdSector = new byte[vdSectorTmp.Length - xaOff];
Array.Copy(vdSectorTmp, xaOff, vdSector, 0, vdSector.Length);
byte vdType = vdSector[0 + hsOff]; // Volume Descriptor Type, should be 1 or 2.
DicConsole.DebugWriteLine("ISO9660 plugin", "VDType = {0}", vdType);
if (vdType == 255) // Supposedly we are in the PVD.
{
if (counter == 0)
{
return(Errno.InvalidArgument);
}
break;
}
Array.Copy(vdSector, 0x001, vdMagic, 0, 5);
Array.Copy(vdSector, 0x009, hsMagic, 0, 5);
if (Encoding.GetString(vdMagic) != ISO_MAGIC && Encoding.GetString(hsMagic) != HIGH_SIERRA_MAGIC &&
Encoding.GetString(vdMagic) != CDI_MAGIC
) // Recognized, it is an ISO9660, now check for rest of data.
{
if (counter == 0)
{
return(Errno.InvalidArgument);
}
break;
}
cdi |= Encoding.GetString(vdMagic) == CDI_MAGIC;
switch (vdType)
{
case 0:
{
if (debug)
{
bvdSectors.Add(16 + counter + partition.Start);
}
break;
}
case 1:
{
if (highSierra)
{
hsvd = Marshal
.ByteArrayToStructureLittleEndian <HighSierraPrimaryVolumeDescriptor>(vdSector);
}
else if (cdi)
{
fsvd = Marshal.ByteArrayToStructureBigEndian <FileStructureVolumeDescriptor>(vdSector);
}
else
{
pvd = Marshal.ByteArrayToStructureLittleEndian <PrimaryVolumeDescriptor>(vdSector);
}
if (debug)
{
pvdSectors.Add(16 + counter + partition.Start);
}
break;
}
case 2:
{
PrimaryVolumeDescriptor svd =
Marshal.ByteArrayToStructureLittleEndian <PrimaryVolumeDescriptor>(vdSector);
// TODO: Other escape sequences
// Check if this is Joliet
if (svd.version == 1)
{
if (svd.escape_sequences[0] == '%' && svd.escape_sequences[1] == '/')
{
if (svd.escape_sequences[2] == '@' || svd.escape_sequences[2] == 'C' ||
svd.escape_sequences[2] == 'E')
{
jolietvd = svd;
}
else
{
DicConsole.WriteLine("ISO9660 plugin",
"Found unknown supplementary volume descriptor");
}
}
if (debug)
{
svdSectors.Add(16 + counter + partition.Start);
}
}
else
{
if (debug)
{
evdSectors.Add(16 + counter + partition.Start);
}
if (useEvd)
{
// Basically until escape sequences are implemented, let the user chose the encoding.
// This is the same as user chosing Romeo namespace, but using the EVD instead of the PVD
this.@namespace = Namespace.Romeo;
pvd = svd;
}
}
break;
}
case 3:
{
if (debug)
{
vpdSectors.Add(16 + counter + partition.Start);
}
break;
}
}
counter++;
}
DecodedVolumeDescriptor decodedVd;
DecodedVolumeDescriptor decodedJolietVd = new DecodedVolumeDescriptor();
XmlFsType = new FileSystemType();
if (pvd == null && hsvd == null && fsvd == null)
{
DicConsole.ErrorWriteLine("ERROR: Could not find primary volume descriptor");
return(Errno.InvalidArgument);
}
if (highSierra)
{
decodedVd = DecodeVolumeDescriptor(hsvd.Value);
}
else if (cdi)
{
decodedVd = DecodeVolumeDescriptor(fsvd.Value);
}
else
{
decodedVd = DecodeVolumeDescriptor(pvd.Value);
}
if (jolietvd != null)
{
decodedJolietVd = DecodeJolietDescriptor(jolietvd.Value);
}
if (this.@namespace != Namespace.Romeo)
{
Encoding = Encoding.ASCII;
}
string fsFormat;
byte[] pathTableData;
uint pathTableSizeInSectors;
uint pathTableMsbLocation;
uint pathTableLsbLocation = 0; // Initialize to 0 as ignored in CD-i
image = imagePlugin;
if (highSierra)
{
pathTableSizeInSectors = hsvd.Value.path_table_size / 2048;
if (hsvd.Value.path_table_size % 2048 > 0)
{
pathTableSizeInSectors++;
}
pathTableData = ReadSectors(Swapping.Swap(hsvd.Value.mandatory_path_table_msb), pathTableSizeInSectors);
fsFormat = "High Sierra Format";
pathTableMsbLocation = hsvd.Value.mandatory_path_table_msb;
pathTableLsbLocation = hsvd.Value.mandatory_path_table_lsb;
}
else if (cdi)
{
pathTableSizeInSectors = fsvd.Value.path_table_size / 2048;
if (fsvd.Value.path_table_size % 2048 > 0)
{
pathTableSizeInSectors++;
}
pathTableData = ReadSectors(fsvd.Value.path_table_addr, pathTableSizeInSectors);
fsFormat = "CD-i";
pathTableMsbLocation = fsvd.Value.path_table_addr;
// TODO: Until escape sequences are implemented this is the default CD-i encoding.
Encoding = Encoding.GetEncoding("iso8859-1");
}
else
{
pathTableSizeInSectors = pvd.Value.path_table_size / 2048;
if (pvd.Value.path_table_size % 2048 > 0)
{
pathTableSizeInSectors++;
}
pathTableData = ReadSectors(Swapping.Swap(pvd.Value.type_m_path_table), pathTableSizeInSectors);
fsFormat = "ISO9660";
pathTableMsbLocation = pvd.Value.type_m_path_table;
pathTableLsbLocation = pvd.Value.type_l_path_table;
}
pathTable = highSierra ? DecodeHighSierraPathTable(pathTableData) : DecodePathTable(pathTableData);
// High Sierra and CD-i do not support Joliet or RRIP
if ((highSierra || cdi) && this.@namespace != Namespace.Normal && this.@namespace != Namespace.Vms)
{
this.@namespace = Namespace.Normal;
}
if (jolietvd is null && this.@namespace == Namespace.Joliet)
{
this.@namespace = Namespace.Normal;
}
uint rootLocation;
uint rootSize;
byte rootXattrLength = 0;
if (!cdi)
{
rootLocation = highSierra
? hsvd.Value.root_directory_record.extent
: pvd.Value.root_directory_record.extent;
rootXattrLength = highSierra
? hsvd.Value.root_directory_record.xattr_len
: pvd.Value.root_directory_record.xattr_len;
if (highSierra)
{
rootSize = hsvd.Value.root_directory_record.size / hsvd.Value.logical_block_size;
if (hsvd.Value.root_directory_record.size % hsvd.Value.logical_block_size > 0)
{
rootSize++;
}
}
else
{
rootSize = pvd.Value.root_directory_record.size / pvd.Value.logical_block_size;
if (pvd.Value.root_directory_record.size % pvd.Value.logical_block_size > 0)
{
rootSize++;
}
}
}
else
{
rootLocation = pathTable[0].Extent;
byte[] firstRootSector = ReadSectors(rootLocation, 1);
CdiDirectoryRecord rootEntry =
Marshal.ByteArrayToStructureBigEndian <CdiDirectoryRecord>(firstRootSector);
rootSize = rootEntry.size / fsvd.Value.logical_block_size;
if (rootEntry.size % fsvd.Value.logical_block_size > 0)
{
rootSize++;
}
usePathTable = usePathTable || pathTable.Length == 1;
useTransTbl = false;
}
// In case the path table is incomplete
if (usePathTable && pathTableData.Length == 1)
{
usePathTable = false;
}
if (rootLocation + rootSize >= imagePlugin.Info.Sectors)
{
return(Errno.InvalidArgument);
}
byte[] rootDir = ReadSectors(rootLocation, rootSize);
byte[] ipbinSector = ReadSectors(partition.Start, 1);
CD.IPBin? segaCd = CD.DecodeIPBin(ipbinSector);
Saturn.IPBin? saturn = Saturn.DecodeIPBin(ipbinSector);
Dreamcast.IPBin?dreamcast = Dreamcast.DecodeIPBin(ipbinSector);
if (this.@namespace == Namespace.Joliet || this.@namespace == Namespace.Rrip)
{
usePathTable = false;
useTransTbl = false;
}
// Cannot traverse path table if we substitute the names for the ones in TRANS.TBL
if (useTransTbl)
{
usePathTable = false;
}
if (this.@namespace != Namespace.Joliet)
{
rootDirectoryCache = cdi
? DecodeCdiDirectory(rootLocation, rootSize, rootXattrLength)
: highSierra
? DecodeHighSierraDirectory(rootLocation, rootSize, rootXattrLength)
: DecodeIsoDirectory(rootLocation, rootSize, rootXattrLength);
}
XmlFsType.Type = fsFormat;
if (debug)
{
rootDirectoryCache.Add("$",
new DecodedDirectoryEntry
{
Extents =
new List <(uint extent, uint size)>
{
(rootLocation, (uint)rootDir.Length)
},
Filename = "$",
Size = (uint)rootDir.Length,
Timestamp = decodedVd.CreationTime
});
