mirror of
https://github.com/aaru-dps/Aaru.git
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Natalia Portillo
4ef3252b24
Introduces constant fields for respective debug module names, replacing the hardcoded ones. This is done to standardize the naming convention, reduce redundancy and potentially avoid any typos or name mismatches across the project. This change makes the code more maintainable and easier to update in case module names need to be changed.
203 lines
9.1 KiB
C#
203 lines
9.1 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Mode2.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : ISO9660 filesystem plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Handles reading sectors in MODE 0, 1 and 2.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2023 Natalia Portillo
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// In the loving memory of Facunda "Tata" Suárez Domínguez, R.I.P. 2019/07/24
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// ****************************************************************************/
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using System;
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using System.IO;
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using Aaru.CommonTypes.Enums;
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using Aaru.Console;
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using Aaru.Decoders.CD;
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namespace Aaru.Filesystems;
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public sealed partial class ISO9660
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{
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ErrorNumber ReadSector(ulong sector, out byte[] buffer, bool interleaved = false, byte fileNumber = 0)
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{
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ErrorNumber errno;
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buffer = null;
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uint sectorCount = (uint)_blockSize / 2048;
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if(_blockSize % 2048 > 0)
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sectorCount++;
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ulong realSector = sector * _blockSize / 2048;
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ulong offset = sector * _blockSize % 2048;
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byte[] data;
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if(sectorCount == 1)
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{
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errno = _image.ReadSectorLong(realSector, out data);
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if(errno != ErrorNumber.NoError)
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errno = _image.ReadSector(realSector, out data);
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if(errno != ErrorNumber.NoError)
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return errno;
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if(_debug)
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switch(data.Length)
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{
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case 2048:
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AaruConsole.DebugWriteLine(MODULE_NAME,
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Localization.tor_Sector_0_Cooked_Mode_zero_one_Mode_two_Form_one,
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realSector);
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break;
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case 2324:
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.tor_Sector_0_Cooked_Mode_two_Form_two,
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realSector);
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break;
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case 2336:
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AaruConsole.DebugWriteLine(MODULE_NAME,
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Localization.
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tor_Sector_0_Cooked_Mode_two_Form_1_File_Number_2_Channel_Number_3_Submode_4_Coding_Information_5,
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realSector,
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((Mode2Submode)data[2]).HasFlag(Mode2Submode.Form2) ? 2 : 1, data[0],
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data[1], (Mode2Submode)data[2], data[3]);
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break;
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case 2352 when data[0] != 0x00 || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF ||
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data[4] != 0xFF || data[5] != 0xFF || data[6] != 0xFF || data[7] != 0xFF ||
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data[8] != 0xFF || data[9] != 0xFF || data[10] != 0xFF || data[11] != 0x00:
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.tor_Sector_0_Raw_Audio, realSector);
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break;
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case 2352 when data[15] != 2:
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.tor_Sector_0_1_2_3_Raw_Mode_4,
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realSector, data[12], data[13], data[14], data[15]);
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break;
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case 2352:
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AaruConsole.DebugWriteLine(MODULE_NAME,
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Localization.
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tor_Sector_0_1_2_3_Raw_Mode_two_Form_4_File_Number_5_Channel_Number_6_Submode_7_Coding_Information_8,
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realSector, data[12], data[13], data[14],
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((Mode2Submode)data[18]).HasFlag(Mode2Submode.Form2) ? 2 : 1,
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data[16], data[17], (Mode2Submode)data[18], data[19]);
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break;
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}
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if(_blockSize == 2048)
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{
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buffer = Sector.GetUserData(data, interleaved, fileNumber);
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return ErrorNumber.NoError;
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}
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byte[] tmp = new byte[_blockSize];
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Array.Copy(Sector.GetUserData(data, interleaved, fileNumber), (int)offset, tmp, 0, _blockSize);
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buffer = tmp;
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return errno;
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}
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else
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{
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var ms = new MemoryStream();
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for(uint i = 0; i < sectorCount; i++)
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{
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ulong dstSector = realSector + 1;
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errno = _image.ReadSectorLong(dstSector, out data);
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if(errno != ErrorNumber.NoError)
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errno = _image.ReadSector(dstSector, out data);
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if(errno != ErrorNumber.NoError)
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return errno;
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if(_debug)
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switch(data.Length)
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{
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case 2048:
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AaruConsole.DebugWriteLine(MODULE_NAME,
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Localization.tor_Sector_0_Cooked_Mode_zero_one_Mode_two_Form_one,
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dstSector);
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break;
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case 2324:
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AaruConsole.DebugWriteLine(MODULE_NAME,
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Localization.tor_Sector_0_Cooked_Mode_two_Form_two, dstSector);
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break;
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case 2336:
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AaruConsole.DebugWriteLine(MODULE_NAME,
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Localization.
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tor_Sector_0_Cooked_Mode_two_Form_1_File_Number_2_Channel_Number_3_Submode_4_Coding_Information_5,
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dstSector,
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((Mode2Submode)data[2]).HasFlag(Mode2Submode.Form2) ? 2 : 1,
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data[0], data[1], (Mode2Submode)data[2], data[3]);
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break;
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case 2352 when data[0] != 0x00 || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF ||
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data[4] != 0xFF || data[5] != 0xFF || data[6] != 0xFF || data[7] != 0xFF ||
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data[8] != 0xFF || data[9] != 0xFF || data[10] != 0xFF || data[11] != 0x00:
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.tor_Sector_0_Raw_Audio,
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dstSector);
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break;
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case 2352 when data[15] != 2:
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.tor_Sector_0_1_2_3_Raw_Mode_4,
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dstSector, data[12], data[13], data[14], data[15]);
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break;
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case 2352:
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AaruConsole.DebugWriteLine(MODULE_NAME,
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Localization.
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tor_Sector_0_1_2_3_Raw_Mode_two_Form_4_File_Number_5_Channel_Number_6_Submode_7_Coding_Information_8,
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dstSector, data[12], data[13], data[14],
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((Mode2Submode)data[18]).HasFlag(Mode2Submode.Form2) ? 2 : 1,
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data[16], data[17], (Mode2Submode)data[18], data[19]);
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break;
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}
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byte[] sectorData = Sector.GetUserData(data, interleaved, fileNumber);
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ms.Write(sectorData, 0, sectorData.Length);
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}
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byte[] tmp = new byte[_blockSize];
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Array.Copy(Sector.GetUserData(ms.ToArray(), interleaved, fileNumber), 0, tmp, 0, _blockSize);
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buffer = tmp;
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return ErrorNumber.NoError;
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}
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}
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} |