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[Aaru.Core] Improve null safety

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Several files in the Aaru.Core project have been updated to improve null safety. The modification of these files specifically handled null occurrences. Nullable value types are now correctly handled and default values are set to be used where nulls were previously unhandled. This will help prevent null reference exceptions and improve the overall stability of the code.
This commit is contained in:
Natalia Portillo
2023-10-05 02:19:02 +01:00
parent 71a00378b4
commit 2c955cfc49
11 changed files with 77 additions and 61 deletions
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3
Aaru.Core/Devices/Dumping/ATA.cs
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@@ -96,7 +96,8 @@ public partial class Dump
if(ataIdNullable != null)
{
Identify.IdentifyDevice ataId = ataIdNullable.Value;
// Guaranteed to never fall into default
Identify.IdentifyDevice ataId = ataIdNullable ?? default(Identify.IdentifyDevice);
byte[] ataIdentify = cmdBuf;
double totalDuration = 0;
double currentSpeed = 0;

2
Aaru.Core/Devices/Dumping/MiniDisc.cs
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@@ -93,7 +93,7 @@ partial class Dump
decMode = Modes.DecodeMode6(cmdBuf, _dev.ScsiType);
if(decMode.HasValue)
scsiMediumType = (byte)decMode.Value.Header.MediumType;
scsiMediumType = (byte)(decMode?.Header.MediumType ?? default(MediumTypes));
if(blockSize != 2048)
{

52
Aaru.Core/Devices/Dumping/SSC.cs
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@@ -78,23 +78,23 @@ partial class Dump
InitProgress?.Invoke();
if(decSense.HasValue && decSense.Value.SenseKey != SenseKeys.NoSense)
if(decSense.HasValue && decSense?.SenseKey != SenseKeys.NoSense)
{
_dumpLog.WriteLine(Localization.Core.Device_not_ready_Sense, decSense.Value.SenseKey, decSense.Value.ASC,
decSense.Value.ASCQ);
_dumpLog.WriteLine(Localization.Core.Device_not_ready_Sense, decSense?.SenseKey, decSense?.ASC,
decSense?.ASCQ);
StoppingErrorMessage?.Invoke(Localization.Core.Drive_has_status_error_please_correct_Sense_follows +
Environment.NewLine +
decSense.Value.Description);
decSense?.Description);
return;
}
// Not in BOM/P
if(decSense is { ASC: 0x00 } &&
decSense.Value.ASCQ != 0x00 &&
decSense.Value.ASCQ != 0x04 &&
decSense.Value.SenseKey != SenseKeys.IllegalRequest)
if(decSense is { ASC: 0x00 } &&
decSense?.ASCQ != 0x00 &&
decSense?.ASCQ != 0x04 &&
decSense?.SenseKey != SenseKeys.IllegalRequest)
{
_dumpLog.WriteLine(Localization.Core.Rewinding_please_wait);
PulseProgress?.Invoke(Localization.Core.Rewinding_please_wait);
@@ -116,17 +116,16 @@ partial class Dump
// And yet, did not rewind!
if(decSense.HasValue &&
(decSense.Value.ASC == 0x00 && decSense.Value.ASCQ != 0x04 && decSense.Value.ASCQ != 0x00 ||
decSense.Value.ASC != 0x00))
(decSense?.ASC == 0x00 && decSense?.ASCQ != 0x04 && decSense?.ASCQ != 0x00 || decSense?.ASC != 0x00))
{
StoppingErrorMessage?.Invoke(Localization.Core.Drive_could_not_rewind_please_correct_Sense_follows +
Environment.NewLine +
decSense.Value.Description);
decSense?.Description);
_dumpLog.WriteLine(Localization.Core.Drive_could_not_rewind_please_correct_Sense_follows);
_dumpLog.WriteLine(Localization.Core.Device_not_ready_Sense, decSense.Value.SenseKey,
decSense.Value.ASC, decSense.Value.ASCQ);
_dumpLog.WriteLine(Localization.Core.Device_not_ready_Sense, decSense?.SenseKey, decSense?.ASC,
decSense?.ASCQ);
return;
}
@@ -142,17 +141,17 @@ partial class Dump
decSense = Sense.Decode(senseBuf);
if(decSense.HasValue &&
(decSense.Value.ASC == 0x20 && decSense.Value.ASCQ != 0x00 ||
decSense.Value.ASC != 0x20 && decSense.Value.SenseKey != SenseKeys.IllegalRequest))
(decSense?.ASC == 0x20 && decSense?.ASCQ != 0x00 ||
decSense?.ASC != 0x20 && decSense?.SenseKey != SenseKeys.IllegalRequest))
{
StoppingErrorMessage?.Invoke(Localization.Core.Could_not_get_position_Sense_follows +
Environment.NewLine +
decSense.Value.Description);
decSense?.Description);
_dumpLog.WriteLine(Localization.Core.Could_not_get_position_Sense_follows);
_dumpLog.WriteLine(Localization.Core.Device_not_ready_Sense, decSense.Value.SenseKey,
decSense.Value.ASC, decSense.Value.ASCQ);
_dumpLog.WriteLine(Localization.Core.Device_not_ready_Sense, decSense?.SenseKey, decSense?.ASC,
decSense?.ASCQ);
return;
}
@@ -194,17 +193,16 @@ partial class Dump
// And yet, did not rewind!
if(decSense.HasValue &&
(decSense.Value.ASC == 0x00 && decSense.Value.ASCQ != 0x04 && decSense.Value.ASCQ != 0x00 ||
decSense.Value.ASC != 0x00))
(decSense?.ASC == 0x00 && decSense?.ASCQ != 0x04 && decSense?.ASCQ != 0x00 || decSense?.ASC != 0x00))
{
StoppingErrorMessage?.Invoke(Localization.Core.Drive_could_not_rewind_please_correct_Sense_follows +
Environment.NewLine +
decSense.Value.Description);
decSense?.Description);
_dumpLog.WriteLine(Localization.Core.Drive_could_not_rewind_please_correct_Sense_follows);
_dumpLog.WriteLine(Localization.Core.Device_not_ready_Sense, decSense.Value.SenseKey,
decSense.Value.ASC, decSense.Value.ASCQ);
_dumpLog.WriteLine(Localization.Core.Device_not_ready_Sense, decSense?.SenseKey, decSense?.ASC,
decSense?.ASCQ);
return;
}
@@ -289,12 +287,12 @@ partial class Dump
// TODO: Check partitions page
if(decMode.HasValue)
{
scsiMediumTypeTape = (byte)decMode.Value.Header.MediumType;
scsiMediumTypeTape = (byte)(decMode?.Header.MediumType ?? default(MediumTypes));
if(decMode.Value.Header.BlockDescriptors?.Length > 0)
scsiDensityCodeTape = (byte)decMode.Value.Header.BlockDescriptors[0].Density;
if(decMode?.Header.BlockDescriptors?.Length > 0)
scsiDensityCodeTape = (byte)(decMode?.Header.BlockDescriptors[0].Density ?? default(DensityType));
blockSize = decMode.Value.Header.BlockDescriptors?[0].BlockLength ?? 0;
blockSize = decMode?.Header.BlockDescriptors?[0].BlockLength ?? 0;
UpdateStatus?.Invoke(string.Format(Localization.Core.Device_reports_0_blocks, blocks));
}

12
Aaru.Core/Devices/Dumping/Sbc/Dump.cs
View File

@@ -176,15 +176,15 @@ partial class Dump
if(decMode.HasValue)
{
scsiMediumType = (byte)decMode.Value.Header.MediumType;
scsiMediumType = (byte)(decMode?.Header.MediumType ?? default(MediumTypes));
if(decMode.Value.Header.BlockDescriptors?.Length > 0)
scsiDensityCode = (byte)decMode.Value.Header.BlockDescriptors[0].Density;
if(decMode?.Header.BlockDescriptors?.Length > 0)
scsiDensityCode = (byte)(decMode?.Header.BlockDescriptors[0].Density ?? default(DensityType));
// TODO: Fix this
containsFloppyPage = decMode.Value.Pages?.Aggregate(containsFloppyPage,
(current, modePage) =>
current | modePage.Page == 0x05) ==
containsFloppyPage = decMode?.Pages?.Aggregate(containsFloppyPage,
(current, modePage) =>
current | modePage.Page == 0x05) ==
true;
}
}

3
Aaru.Core/Devices/Dumping/XGD.cs
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@@ -356,7 +356,8 @@ partial class Dump
return;
}
PFI.PhysicalFormatInformation wxRipperPfi = wxRipperPfiNullable.Value;
// Guaranteed to never fall into default
PFI.PhysicalFormatInformation wxRipperPfi = wxRipperPfiNullable ?? default(PFI.PhysicalFormatInformation);
UpdateStatus?.Invoke(string.Format(Localization.Core.WxRipper_PFI_Data_Area_Start_PSN_0_sectors,
wxRipperPfi.DataAreaStartPSN));

6
Aaru.Core/Devices/Report/GdRomSwapTrick.cs
View File

@@ -126,7 +126,8 @@ public sealed partial class DeviceReport
return;
}
FullTOC.CDFullTOC toc = decodedToc.Value;
// Guaranteed to never fall into default
FullTOC.CDFullTOC toc = decodedToc ?? default(FullTOC.CDFullTOC);
FullTOC.TrackDataDescriptor leadOutTrack = toc.TrackDescriptors.FirstOrDefault(t => t.POINT == 0xA2);
@@ -241,7 +242,8 @@ public sealed partial class DeviceReport
return;
}
toc = decodedToc.Value;
// Guaranteed to never fall into default
toc = decodedToc ?? default(FullTOC.CDFullTOC);
FullTOC.TrackDataDescriptor newLeadOutTrack = toc.TrackDescriptors.FirstOrDefault(t => t.POINT == 0xA2);

4
Aaru.Core/Devices/Report/MMC.cs
View File

@@ -1373,7 +1373,7 @@ public sealed partial class DeviceReport
if(mediaType == "Audio CD")
{
mediaTest.CanReadLeadOut = !_dev.ReadCd(out buffer, out senseBuffer,
(uint)(mediaTest.Blocks + 1), 2352, 1,
(uint)((mediaTest.Blocks ?? 0) + 1), 2352, 1,
MmcSectorTypes.Cdda, false, false, false,
MmcHeaderCodes.None, true, false, MmcErrorField.None,
MmcSubchannel.None, _dev.Timeout, out _);
@@ -1381,7 +1381,7 @@ public sealed partial class DeviceReport
else
{
mediaTest.CanReadLeadOut = !_dev.ReadCd(out buffer, out senseBuffer,
(uint)(mediaTest.Blocks + 1), 2352, 1,
(uint)((mediaTest.Blocks ?? 0) + 1), 2352, 1,
MmcSectorTypes.AllTypes, false, false, true,
MmcHeaderCodes.AllHeaders, true, true,
MmcErrorField.None, MmcSubchannel.None, _dev.Timeout,

2
Aaru.Core/Devices/Report/SSC.cs
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@@ -198,7 +198,7 @@ public sealed partial class DeviceReport
seqTest.MediumType = (byte)decMode.Value.Header.MediumType;
if(decMode.Value.Header.BlockDescriptors?.Length > 0)
seqTest.Density = (byte)decMode.Value.Header.BlockDescriptors?[0].Density;
seqTest.Density = (byte)(decMode.Value.Header.BlockDescriptors?[0].Density ?? default(DensityType));
}
Spectre.ProgressSingleSpinner(ctx =>