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Fix deleting of directories with small offset (most commonly subdirectories)

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This commit is contained in:
Quajak 2020-09-19 21:44:28 +02:00
parent ec840b04a7
commit e1bda335ab
2 changed files with 28 additions and 18 deletions
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23
Tests/Kernels/Cosmos.Kernel.Tests.Fat/System.IO/DirectoryTest.cs
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@ -12,7 +12,6 @@ namespace Cosmos.Kernel.Tests.Fat.System.IO
/// </summary>
public static void Execute(Debugger mDebugger)
{
mDebugger.Send("START TEST: Delete a directory:");
Directory.CreateDirectory(@"0:\TestDir1");
Assert.IsTrue(Directory.Exists(@"0:\TestDir1"), "TestDir1 wasn't created!");
@ -97,22 +96,20 @@ namespace Cosmos.Kernel.Tests.Fat.System.IO
mDebugger.Send("");
#if false
mDebugger.Send("START TEST: Delete a file with Directory.Delete:");
File.Create(@"0:\file1.txt");
mDebugger.Send("START TEST: Creating a subdirecty with Directory.CreateDirectory:");
try
{
Directory.Delete(@"0:\file1.txt");
}
catch (Exception e)
{
Assert.IsTrue(File.Exists(@"0:\file1.txt"), "The file was deleted by Directory.Delete.");
}
Directory.CreateDirectory(@"0:\TestDir1");
Assert.IsTrue(Directory.Exists(@"0:\TestDir1"), "TestDir1 was created!");
Directory.CreateDirectory(@"0:\TestDir1\test");
Assert.IsTrue(Directory.Exists(@"0:\TestDir1\test"), "test subdirectory was created!");
Directory.Delete(@"0:\TestDir1\test");
Assert.IsFalse(Directory.Exists(@"0:\TestDir1\test"), "test subdirectory was deleted!");
Directory.Delete(@"0:\TestDir1");
Assert.IsFalse(Directory.Exists(@"0:\TestDir1"), "TestDir1 was deleted!");
mDebugger.Send("END TEST");
mDebugger.Send("");
#endif
mDebugger.Send("START TEST: Create a directory with a Long Filename:");
Directory.CreateDirectory(@"0:\TestDir1");

23
source/Cosmos.System2/FileSystem/FAT/Listing/FatDiretoryEntry.cs
View file

@ -512,6 +512,8 @@ namespace Cosmos.System.FileSystem.FAT.Listing
/// <exception cref="NotSupportedException">Thrown when FAT type is unknown.</exception>
public void DeleteDirectoryEntry()
{
Global.mFileSystemDebugger.SendInternal("-- FatDirectoryEntry.DeleteDirectoryEntry --");
if (mEntryType == DirectoryEntryTypeEnum.Unknown)
{
throw new NotImplementedException();
@ -524,12 +526,17 @@ namespace Cosmos.System.FileSystem.FAT.Listing
var xData = ((FatDirectoryEntry)mParent).GetDirectoryEntryData();
var xEntryOffset = mEntryHeaderDataOffset - 32;
while (xData[xEntryOffset + 11] == FatDirectoryEntryAttributeConsts.LongName)
if(mEntryHeaderDataOffset > 32)
{
xData[xEntryOffset] = FatDirectoryEntryAttributeConsts.UnusedOrDeletedEntry;
xEntryOffset -= 32;
var xEntryOffset = mEntryHeaderDataOffset - 32;
Global.mFileSystemDebugger.SendInternal("xEntryOffset: " + xEntryOffset);
while (xData[xEntryOffset + 11] == FatDirectoryEntryAttributeConsts.LongName)
{
xData[xEntryOffset] = FatDirectoryEntryAttributeConsts.UnusedOrDeletedEntry;
xEntryOffset -= 32;
}
}
((FatDirectoryEntry)mParent).SetDirectoryEntryData(xData);
@ -988,6 +995,7 @@ namespace Cosmos.System.FileSystem.FAT.Listing
internal void SetDirectoryEntryMetadataValue(FatDirectoryEntryMetadata aEntryMetadata, byte aValue)
{
Global.mFileSystemDebugger.SendInternal(" -- FatDirectoryEntry.SetDirectoryEntryMetadataValue(uint) --");
Global.mFileSystemDebugger.SendInternal("aEntryMetadata = " + aEntryMetadata.DataOffset);
Global.mFileSystemDebugger.SendInternal("aValue = " + aValue);
if (IsRootDirectory())
@ -1043,6 +1051,7 @@ namespace Cosmos.System.FileSystem.FAT.Listing
internal void SetDirectoryEntryMetadataValue(FatDirectoryEntryMetadata aEntryMetadata, ushort aValue)
{
Global.mFileSystemDebugger.SendInternal(" -- FatDirectoryEntry.SetDirectoryEntryMetadataValue(uint) --");
Global.mFileSystemDebugger.SendInternal("aEntryMetadata = " + aEntryMetadata.DataOffset);
Global.mFileSystemDebugger.SendInternal("aValue = " + aValue);
if (IsRootDirectory())
@ -1054,6 +1063,7 @@ namespace Cosmos.System.FileSystem.FAT.Listing
if (xData.Length > 0)
{
Global.mFileSystemDebugger.SendInternal("mEntryHeaderDataOffset = " + mEntryHeaderDataOffset);
var xValue = new byte[aEntryMetadata.DataLength];
xValue.SetUInt16(0, aValue);
uint offset = mEntryHeaderDataOffset + aEntryMetadata.DataOffset;
@ -1100,6 +1110,7 @@ namespace Cosmos.System.FileSystem.FAT.Listing
internal void SetDirectoryEntryMetadataValue(FatDirectoryEntryMetadata aEntryMetadata, uint aValue)
{
Global.mFileSystemDebugger.SendInternal(" -- FatDirectoryEntry.SetDirectoryEntryMetadataValue(uint) --");
Global.mFileSystemDebugger.SendInternal("aEntryMetadata = " + aEntryMetadata.DataOffset);
Global.mFileSystemDebugger.SendInternal("aValue = " + aValue);
if (IsRootDirectory())
@ -1157,6 +1168,7 @@ namespace Cosmos.System.FileSystem.FAT.Listing
internal void SetDirectoryEntryMetadataValue(FatDirectoryEntryMetadata aEntryMetadata, long aValue)
{
Global.mFileSystemDebugger.SendInternal("-- FatDirectoryEntry.SetDirectoryEntryMetadataValue(long) --");
Global.mFileSystemDebugger.SendInternal("aEntryMetadata = " + aEntryMetadata.DataOffset);
Global.mFileSystemDebugger.SendInternal("aValue =");
Global.mFileSystemDebugger.SendInternal(aValue);
@ -1218,6 +1230,7 @@ namespace Cosmos.System.FileSystem.FAT.Listing
internal void SetDirectoryEntryMetadataValue(FatDirectoryEntryMetadata aEntryMetadata, string aValue)
{
Global.mFileSystemDebugger.SendInternal("-- FatDirectoryEntry.SetDirectoryEntryMetadataValue(string) --");
Global.mFileSystemDebugger.SendInternal("aEntryMetadata = " + aEntryMetadata.DataOffset);
Global.mFileSystemDebugger.SendInternal($"aValue = {aValue}");
if (IsRootDirectory())