mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
REFACTOR: Invert 'if' statement to reduce nesting.
This commit is contained in:
@@ -89,230 +89,229 @@ namespace DiscImageChef.Filesystems.LisaFS
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if(volumePrefix == device.ImageInfo.Sectors && searchTag.fileID == FILEID_LOADER_SIGNED)
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volumePrefix = i - 1;
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if(searchTag.fileID == FILEID_MDDF)
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if(searchTag.fileID != FILEID_MDDF) continue;
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devTagSize = device.ReadSectorTag(i, SectorTagType.AppleSectorTag).Length;
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byte[] sector = device.ReadSector(i);
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mddf = new MDDF();
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byte[] pString = new byte[33];
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uint lisa_time;
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mddf.fsversion = BigEndianBitConverter.ToUInt16(sector, 0x00);
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mddf.volid = BigEndianBitConverter.ToUInt64(sector, 0x02);
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mddf.volnum = BigEndianBitConverter.ToUInt16(sector, 0x0A);
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Array.Copy(sector, 0x0C, pString, 0, 33);
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mddf.volname = StringHandlers.PascalToString(pString, CurrentEncoding);
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mddf.unknown1 = sector[0x2D];
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Array.Copy(sector, 0x2E, pString, 0, 33);
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// Prevent garbage
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if(pString[0] <= 32) mddf.password = StringHandlers.PascalToString(pString, CurrentEncoding);
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else mddf.password = "";
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mddf.unknown2 = sector[0x4F];
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mddf.machine_id = BigEndianBitConverter.ToUInt32(sector, 0x50);
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mddf.master_copy_id = BigEndianBitConverter.ToUInt32(sector, 0x54);
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lisa_time = BigEndianBitConverter.ToUInt32(sector, 0x58);
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mddf.dtvc = DateHandlers.LisaToDateTime(lisa_time);
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lisa_time = BigEndianBitConverter.ToUInt32(sector, 0x5C);
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mddf.dtcc = DateHandlers.LisaToDateTime(lisa_time);
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lisa_time = BigEndianBitConverter.ToUInt32(sector, 0x60);
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mddf.dtvb = DateHandlers.LisaToDateTime(lisa_time);
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lisa_time = BigEndianBitConverter.ToUInt32(sector, 0x64);
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mddf.dtvs = DateHandlers.LisaToDateTime(lisa_time);
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mddf.unknown3 = BigEndianBitConverter.ToUInt32(sector, 0x68);
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mddf.mddf_block = BigEndianBitConverter.ToUInt32(sector, 0x6C);
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mddf.volsize_minus_one = BigEndianBitConverter.ToUInt32(sector, 0x70);
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mddf.volsize_minus_mddf_minus_one = BigEndianBitConverter.ToUInt32(sector, 0x74);
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mddf.vol_size = BigEndianBitConverter.ToUInt32(sector, 0x78);
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mddf.blocksize = BigEndianBitConverter.ToUInt16(sector, 0x7C);
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mddf.datasize = BigEndianBitConverter.ToUInt16(sector, 0x7E);
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mddf.unknown4 = BigEndianBitConverter.ToUInt16(sector, 0x80);
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mddf.unknown5 = BigEndianBitConverter.ToUInt32(sector, 0x82);
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mddf.unknown6 = BigEndianBitConverter.ToUInt32(sector, 0x86);
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mddf.clustersize = BigEndianBitConverter.ToUInt16(sector, 0x8A);
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mddf.fs_size = BigEndianBitConverter.ToUInt32(sector, 0x8C);
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mddf.unknown7 = BigEndianBitConverter.ToUInt32(sector, 0x90);
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mddf.srec_ptr = BigEndianBitConverter.ToUInt32(sector, 0x94);
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mddf.unknown9 = BigEndianBitConverter.ToUInt16(sector, 0x98);
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mddf.srec_len = BigEndianBitConverter.ToUInt16(sector, 0x9A);
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mddf.unknown10 = BigEndianBitConverter.ToUInt32(sector, 0x9C);
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mddf.unknown11 = BigEndianBitConverter.ToUInt32(sector, 0xA0);
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mddf.unknown12 = BigEndianBitConverter.ToUInt32(sector, 0xA4);
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mddf.unknown13 = BigEndianBitConverter.ToUInt32(sector, 0xA8);
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mddf.unknown14 = BigEndianBitConverter.ToUInt32(sector, 0xAC);
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mddf.filecount = BigEndianBitConverter.ToUInt16(sector, 0xB0);
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mddf.unknown15 = BigEndianBitConverter.ToUInt32(sector, 0xB2);
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mddf.unknown16 = BigEndianBitConverter.ToUInt32(sector, 0xB6);
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mddf.freecount = BigEndianBitConverter.ToUInt32(sector, 0xBA);
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mddf.unknown17 = BigEndianBitConverter.ToUInt16(sector, 0xBE);
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mddf.unknown18 = BigEndianBitConverter.ToUInt32(sector, 0xC0);
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mddf.overmount_stamp = BigEndianBitConverter.ToUInt64(sector, 0xC4);
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mddf.serialization = BigEndianBitConverter.ToUInt32(sector, 0xCC);
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mddf.unknown19 = BigEndianBitConverter.ToUInt32(sector, 0xD0);
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mddf.unknown_timestamp = BigEndianBitConverter.ToUInt32(sector, 0xD4);
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mddf.unknown20 = BigEndianBitConverter.ToUInt32(sector, 0xD8);
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mddf.unknown21 = BigEndianBitConverter.ToUInt32(sector, 0xDC);
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mddf.unknown22 = BigEndianBitConverter.ToUInt32(sector, 0xE0);
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mddf.unknown23 = BigEndianBitConverter.ToUInt32(sector, 0xE4);
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mddf.unknown24 = BigEndianBitConverter.ToUInt32(sector, 0xE8);
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mddf.unknown25 = BigEndianBitConverter.ToUInt32(sector, 0xEC);
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mddf.unknown26 = BigEndianBitConverter.ToUInt32(sector, 0xF0);
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mddf.unknown27 = BigEndianBitConverter.ToUInt32(sector, 0xF4);
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mddf.unknown28 = BigEndianBitConverter.ToUInt32(sector, 0xF8);
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mddf.unknown29 = BigEndianBitConverter.ToUInt32(sector, 0xFC);
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mddf.unknown30 = BigEndianBitConverter.ToUInt32(sector, 0x100);
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mddf.unknown31 = BigEndianBitConverter.ToUInt32(sector, 0x104);
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mddf.unknown32 = BigEndianBitConverter.ToUInt32(sector, 0x108);
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mddf.unknown33 = BigEndianBitConverter.ToUInt32(sector, 0x10C);
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mddf.unknown34 = BigEndianBitConverter.ToUInt32(sector, 0x110);
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mddf.unknown35 = BigEndianBitConverter.ToUInt32(sector, 0x114);
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mddf.backup_volid = BigEndianBitConverter.ToUInt64(sector, 0x118);
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mddf.label_size = BigEndianBitConverter.ToUInt16(sector, 0x120);
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mddf.fs_overhead = BigEndianBitConverter.ToUInt16(sector, 0x122);
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mddf.result_scavenge = BigEndianBitConverter.ToUInt16(sector, 0x124);
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mddf.boot_code = BigEndianBitConverter.ToUInt16(sector, 0x126);
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mddf.boot_environ = BigEndianBitConverter.ToUInt16(sector, 0x6C);
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mddf.unknown36 = BigEndianBitConverter.ToUInt32(sector, 0x12A);
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mddf.unknown37 = BigEndianBitConverter.ToUInt32(sector, 0x12E);
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mddf.unknown38 = BigEndianBitConverter.ToUInt32(sector, 0x132);
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mddf.vol_sequence = BigEndianBitConverter.ToUInt16(sector, 0x136);
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mddf.vol_left_mounted = sector[0x138];
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// Check that the MDDF is correct
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if(mddf.mddf_block != i - volumePrefix || mddf.vol_size > device.GetSectors() ||
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mddf.vol_size - 1 != mddf.volsize_minus_one ||
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mddf.vol_size - i - 1 != mddf.volsize_minus_mddf_minus_one - volumePrefix ||
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mddf.datasize > mddf.blocksize || mddf.blocksize < device.GetSectorSize() ||
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mddf.datasize != device.GetSectorSize())
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{
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devTagSize = device.ReadSectorTag(i, SectorTagType.AppleSectorTag).Length;
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DicConsole.DebugWriteLine("LisaFS plugin", "Incorrect MDDF found");
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return Errno.InvalidArgument;
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}
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byte[] sector = device.ReadSector(i);
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mddf = new MDDF();
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byte[] pString = new byte[33];
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uint lisa_time;
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// Check MDDF version
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switch(mddf.fsversion)
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{
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case LisaFSv1:
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DicConsole.DebugWriteLine("LisaFS plugin", "Mounting LisaFS v1");
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break;
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case LisaFSv2:
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DicConsole.DebugWriteLine("LisaFS plugin", "Mounting LisaFS v2");
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break;
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case LisaFSv3:
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DicConsole.DebugWriteLine("LisaFS plugin", "Mounting LisaFS v3");
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break;
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default:
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DicConsole.ErrorWriteLine("Cannot mount LisaFS version {0}", mddf.fsversion.ToString());
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return Errno.NotSupported;
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}
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mddf.fsversion = BigEndianBitConverter.ToUInt16(sector, 0x00);
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mddf.volid = BigEndianBitConverter.ToUInt64(sector, 0x02);
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mddf.volnum = BigEndianBitConverter.ToUInt16(sector, 0x0A);
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Array.Copy(sector, 0x0C, pString, 0, 33);
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mddf.volname = StringHandlers.PascalToString(pString, CurrentEncoding);
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mddf.unknown1 = sector[0x2D];
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Array.Copy(sector, 0x2E, pString, 0, 33);
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// Prevent garbage
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if(pString[0] <= 32) mddf.password = StringHandlers.PascalToString(pString, CurrentEncoding);
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else mddf.password = "";
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mddf.unknown2 = sector[0x4F];
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mddf.machine_id = BigEndianBitConverter.ToUInt32(sector, 0x50);
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mddf.master_copy_id = BigEndianBitConverter.ToUInt32(sector, 0x54);
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lisa_time = BigEndianBitConverter.ToUInt32(sector, 0x58);
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mddf.dtvc = DateHandlers.LisaToDateTime(lisa_time);
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lisa_time = BigEndianBitConverter.ToUInt32(sector, 0x5C);
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mddf.dtcc = DateHandlers.LisaToDateTime(lisa_time);
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lisa_time = BigEndianBitConverter.ToUInt32(sector, 0x60);
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mddf.dtvb = DateHandlers.LisaToDateTime(lisa_time);
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lisa_time = BigEndianBitConverter.ToUInt32(sector, 0x64);
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mddf.dtvs = DateHandlers.LisaToDateTime(lisa_time);
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mddf.unknown3 = BigEndianBitConverter.ToUInt32(sector, 0x68);
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mddf.mddf_block = BigEndianBitConverter.ToUInt32(sector, 0x6C);
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mddf.volsize_minus_one = BigEndianBitConverter.ToUInt32(sector, 0x70);
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mddf.volsize_minus_mddf_minus_one = BigEndianBitConverter.ToUInt32(sector, 0x74);
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mddf.vol_size = BigEndianBitConverter.ToUInt32(sector, 0x78);
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mddf.blocksize = BigEndianBitConverter.ToUInt16(sector, 0x7C);
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mddf.datasize = BigEndianBitConverter.ToUInt16(sector, 0x7E);
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mddf.unknown4 = BigEndianBitConverter.ToUInt16(sector, 0x80);
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mddf.unknown5 = BigEndianBitConverter.ToUInt32(sector, 0x82);
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mddf.unknown6 = BigEndianBitConverter.ToUInt32(sector, 0x86);
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mddf.clustersize = BigEndianBitConverter.ToUInt16(sector, 0x8A);
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mddf.fs_size = BigEndianBitConverter.ToUInt32(sector, 0x8C);
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mddf.unknown7 = BigEndianBitConverter.ToUInt32(sector, 0x90);
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mddf.srec_ptr = BigEndianBitConverter.ToUInt32(sector, 0x94);
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mddf.unknown9 = BigEndianBitConverter.ToUInt16(sector, 0x98);
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mddf.srec_len = BigEndianBitConverter.ToUInt16(sector, 0x9A);
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mddf.unknown10 = BigEndianBitConverter.ToUInt32(sector, 0x9C);
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mddf.unknown11 = BigEndianBitConverter.ToUInt32(sector, 0xA0);
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mddf.unknown12 = BigEndianBitConverter.ToUInt32(sector, 0xA4);
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mddf.unknown13 = BigEndianBitConverter.ToUInt32(sector, 0xA8);
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mddf.unknown14 = BigEndianBitConverter.ToUInt32(sector, 0xAC);
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mddf.filecount = BigEndianBitConverter.ToUInt16(sector, 0xB0);
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mddf.unknown15 = BigEndianBitConverter.ToUInt32(sector, 0xB2);
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mddf.unknown16 = BigEndianBitConverter.ToUInt32(sector, 0xB6);
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mddf.freecount = BigEndianBitConverter.ToUInt32(sector, 0xBA);
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mddf.unknown17 = BigEndianBitConverter.ToUInt16(sector, 0xBE);
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mddf.unknown18 = BigEndianBitConverter.ToUInt32(sector, 0xC0);
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mddf.overmount_stamp = BigEndianBitConverter.ToUInt64(sector, 0xC4);
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mddf.serialization = BigEndianBitConverter.ToUInt32(sector, 0xCC);
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mddf.unknown19 = BigEndianBitConverter.ToUInt32(sector, 0xD0);
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mddf.unknown_timestamp = BigEndianBitConverter.ToUInt32(sector, 0xD4);
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mddf.unknown20 = BigEndianBitConverter.ToUInt32(sector, 0xD8);
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mddf.unknown21 = BigEndianBitConverter.ToUInt32(sector, 0xDC);
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mddf.unknown22 = BigEndianBitConverter.ToUInt32(sector, 0xE0);
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mddf.unknown23 = BigEndianBitConverter.ToUInt32(sector, 0xE4);
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mddf.unknown24 = BigEndianBitConverter.ToUInt32(sector, 0xE8);
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mddf.unknown25 = BigEndianBitConverter.ToUInt32(sector, 0xEC);
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mddf.unknown26 = BigEndianBitConverter.ToUInt32(sector, 0xF0);
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mddf.unknown27 = BigEndianBitConverter.ToUInt32(sector, 0xF4);
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mddf.unknown28 = BigEndianBitConverter.ToUInt32(sector, 0xF8);
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mddf.unknown29 = BigEndianBitConverter.ToUInt32(sector, 0xFC);
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mddf.unknown30 = BigEndianBitConverter.ToUInt32(sector, 0x100);
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mddf.unknown31 = BigEndianBitConverter.ToUInt32(sector, 0x104);
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mddf.unknown32 = BigEndianBitConverter.ToUInt32(sector, 0x108);
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mddf.unknown33 = BigEndianBitConverter.ToUInt32(sector, 0x10C);
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mddf.unknown34 = BigEndianBitConverter.ToUInt32(sector, 0x110);
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mddf.unknown35 = BigEndianBitConverter.ToUInt32(sector, 0x114);
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mddf.backup_volid = BigEndianBitConverter.ToUInt64(sector, 0x118);
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mddf.label_size = BigEndianBitConverter.ToUInt16(sector, 0x120);
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mddf.fs_overhead = BigEndianBitConverter.ToUInt16(sector, 0x122);
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mddf.result_scavenge = BigEndianBitConverter.ToUInt16(sector, 0x124);
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mddf.boot_code = BigEndianBitConverter.ToUInt16(sector, 0x126);
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mddf.boot_environ = BigEndianBitConverter.ToUInt16(sector, 0x6C);
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mddf.unknown36 = BigEndianBitConverter.ToUInt32(sector, 0x12A);
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mddf.unknown37 = BigEndianBitConverter.ToUInt32(sector, 0x12E);
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mddf.unknown38 = BigEndianBitConverter.ToUInt32(sector, 0x132);
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mddf.vol_sequence = BigEndianBitConverter.ToUInt16(sector, 0x136);
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mddf.vol_left_mounted = sector[0x138];
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// Initialize caches
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extentCache = new Dictionary<short, ExtentFile>();
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systemFileCache = new Dictionary<short, byte[]>();
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fileCache = new Dictionary<short, byte[]>();
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//catalogCache = new Dictionary<short, List<CatalogEntry>>();
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fileSizeCache = new Dictionary<short, int>();
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// Check that the MDDF is correct
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if(mddf.mddf_block != i - volumePrefix || mddf.vol_size > device.GetSectors() ||
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mddf.vol_size - 1 != mddf.volsize_minus_one ||
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mddf.vol_size - i - 1 != mddf.volsize_minus_mddf_minus_one - volumePrefix ||
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mddf.datasize > mddf.blocksize || mddf.blocksize < device.GetSectorSize() ||
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mddf.datasize != device.GetSectorSize())
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{
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DicConsole.DebugWriteLine("LisaFS plugin", "Incorrect MDDF found");
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return Errno.InvalidArgument;
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}
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Errno error;
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// Check MDDF version
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switch(mddf.fsversion)
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{
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case LisaFSv1:
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DicConsole.DebugWriteLine("LisaFS plugin", "Mounting LisaFS v1");
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break;
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case LisaFSv2:
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DicConsole.DebugWriteLine("LisaFS plugin", "Mounting LisaFS v2");
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break;
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case LisaFSv3:
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DicConsole.DebugWriteLine("LisaFS plugin", "Mounting LisaFS v3");
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break;
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default:
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DicConsole.ErrorWriteLine("Cannot mount LisaFS version {0}", mddf.fsversion.ToString());
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return Errno.NotSupported;
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}
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mounted = true;
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this.debug = debug;
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// Initialize caches
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extentCache = new Dictionary<short, ExtentFile>();
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systemFileCache = new Dictionary<short, byte[]>();
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fileCache = new Dictionary<short, byte[]>();
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//catalogCache = new Dictionary<short, List<CatalogEntry>>();
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fileSizeCache = new Dictionary<short, int>();
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if(debug) printedExtents = new List<short>();
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Errno error;
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// Read the S-Records file
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error = ReadSRecords();
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if(error != Errno.NoError)
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{
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DicConsole.ErrorWriteLine("Error {0} reading S-Records file.", error);
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return error;
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}
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mounted = true;
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this.debug = debug;
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directoryDTCCache = new Dictionary<short, DateTime>();
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directoryDTCCache.Add(DIRID_ROOT, mddf.dtcc);
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if(debug) printedExtents = new List<short>();
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// Read the Catalog File
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error = ReadCatalog();
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// Read the S-Records file
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error = ReadSRecords();
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if(error != Errno.NoError)
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{
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DicConsole.DebugWriteLine("LisaFS plugin", "Cannot read Catalog File, error {0}",
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error.ToString());
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mounted = false;
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return error;
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}
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// If debug, cache system files
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if(debug)
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{
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byte[] temp;
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error = ReadSystemFile(FILEID_BOOT_SIGNED, out temp);
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if(error != Errno.NoError)
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{
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DicConsole.ErrorWriteLine("Error {0} reading S-Records file.", error);
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return error;
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}
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directoryDTCCache = new Dictionary<short, DateTime>();
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directoryDTCCache.Add(DIRID_ROOT, mddf.dtcc);
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// Read the Catalog File
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error = ReadCatalog();
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if(error != Errno.NoError)
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{
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DicConsole.DebugWriteLine("LisaFS plugin", "Cannot read Catalog File, error {0}",
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error.ToString());
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DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read boot blocks");
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mounted = false;
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return error;
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}
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// If debug, cache system files
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if(debug)
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error = ReadSystemFile(FILEID_LOADER_SIGNED, out temp);
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if(error != Errno.NoError)
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{
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byte[] temp;
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error = ReadSystemFile(FILEID_BOOT_SIGNED, out temp);
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if(error != Errno.NoError)
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{
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DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read boot blocks");
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mounted = false;
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return error;
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}
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error = ReadSystemFile(FILEID_LOADER_SIGNED, out temp);
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if(error != Errno.NoError)
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{
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DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read boot loader");
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mounted = false;
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return error;
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}
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error = ReadSystemFile((short)FILEID_MDDF, out temp);
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if(error != Errno.NoError)
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{
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DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read MDDF");
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mounted = false;
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return error;
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}
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|
||||
error = ReadSystemFile((short)FILEID_BITMAP, out temp);
|
||||
if(error != Errno.NoError)
|
||||
{
|
||||
DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read volume bitmap");
|
||||
mounted = false;
|
||||
return error;
|
||||
}
|
||||
|
||||
error = ReadSystemFile((short)FILEID_SRECORD, out temp);
|
||||
if(error != Errno.NoError)
|
||||
{
|
||||
DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read S-Records file");
|
||||
mounted = false;
|
||||
return error;
|
||||
}
|
||||
DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read boot loader");
|
||||
mounted = false;
|
||||
return error;
|
||||
}
|
||||
|
||||
// Create XML metadata for mounted filesystem
|
||||
xmlFSType = new Schemas.FileSystemType();
|
||||
if(DateTime.Compare(mddf.dtvb, DateHandlers.LisaToDateTime(0)) > 0)
|
||||
error = ReadSystemFile((short)FILEID_MDDF, out temp);
|
||||
if(error != Errno.NoError)
|
||||
{
|
||||
xmlFSType.BackupDate = mddf.dtvb;
|
||||
xmlFSType.BackupDateSpecified = true;
|
||||
DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read MDDF");
|
||||
mounted = false;
|
||||
return error;
|
||||
}
|
||||
xmlFSType.Clusters = mddf.vol_size;
|
||||
xmlFSType.ClusterSize = mddf.clustersize * mddf.datasize;
|
||||
if(DateTime.Compare(mddf.dtvc, DateHandlers.LisaToDateTime(0)) > 0)
|
||||
{
|
||||
xmlFSType.CreationDate = mddf.dtvc;
|
||||
xmlFSType.CreationDateSpecified = true;
|
||||
}
|
||||
xmlFSType.Dirty = mddf.vol_left_mounted != 0;
|
||||
xmlFSType.Files = mddf.filecount;
|
||||
xmlFSType.FilesSpecified = true;
|
||||
xmlFSType.FreeClusters = mddf.freecount;
|
||||
xmlFSType.FreeClustersSpecified = true;
|
||||
xmlFSType.Type = "LisaFS";
|
||||
xmlFSType.VolumeName = mddf.volname;
|
||||
xmlFSType.VolumeSerial = string.Format("{0:X16}", mddf.volid);
|
||||
|
||||
return Errno.NoError;
|
||||
error = ReadSystemFile((short)FILEID_BITMAP, out temp);
|
||||
if(error != Errno.NoError)
|
||||
{
|
||||
DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read volume bitmap");
|
||||
mounted = false;
|
||||
return error;
|
||||
}
|
||||
|
||||
error = ReadSystemFile((short)FILEID_SRECORD, out temp);
|
||||
if(error != Errno.NoError)
|
||||
{
|
||||
DicConsole.DebugWriteLine("LisaFS plugin", "Unable to read S-Records file");
|
||||
mounted = false;
|
||||
return error;
|
||||
}
|
||||
}
|
||||
|
||||
// Create XML metadata for mounted filesystem
|
||||
xmlFSType = new Schemas.FileSystemType();
|
||||
if(DateTime.Compare(mddf.dtvb, DateHandlers.LisaToDateTime(0)) > 0)
|
||||
{
|
||||
xmlFSType.BackupDate = mddf.dtvb;
|
||||
xmlFSType.BackupDateSpecified = true;
|
||||
}
|
||||
xmlFSType.Clusters = mddf.vol_size;
|
||||
xmlFSType.ClusterSize = mddf.clustersize * mddf.datasize;
|
||||
if(DateTime.Compare(mddf.dtvc, DateHandlers.LisaToDateTime(0)) > 0)
|
||||
{
|
||||
xmlFSType.CreationDate = mddf.dtvc;
|
||||
xmlFSType.CreationDateSpecified = true;
|
||||
}
|
||||
xmlFSType.Dirty = mddf.vol_left_mounted != 0;
|
||||
xmlFSType.Files = mddf.filecount;
|
||||
xmlFSType.FilesSpecified = true;
|
||||
xmlFSType.FreeClusters = mddf.freecount;
|
||||
xmlFSType.FreeClustersSpecified = true;
|
||||
xmlFSType.Type = "LisaFS";
|
||||
xmlFSType.VolumeName = mddf.volname;
|
||||
xmlFSType.VolumeSerial = string.Format("{0:X16}", mddf.volid);
|
||||
|
||||
return Errno.NoError;
|
||||
}
|
||||
|
||||
DicConsole.DebugWriteLine("LisaFS plugin", "Not a Lisa filesystem");
|
||||
|
||||
Reference in New Issue
Block a user