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https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
REFACTOR: Convert 'if' statement to 'switch' statement.
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@@ -210,6 +210,7 @@ namespace DiscImageChef.Filesystems.CPM
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passwordCache = new Dictionary<string, byte[]>();
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DicConsole.DebugWriteLine("CP/M Plugin", "Traversing directory.");
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IntPtr dirPtr;
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// For each directory entry
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for(int dOff = 0; dOff < directory.Length; dOff += 32)
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@@ -218,7 +219,7 @@ namespace DiscImageChef.Filesystems.CPM
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if(allocationBlocks.Count > 256)
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{
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DirectoryEntry16 entry = new DirectoryEntry16();
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IntPtr dirPtr = Marshal.AllocHGlobal(32);
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dirPtr = Marshal.AllocHGlobal(32);
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Marshal.Copy(directory, dOff, dirPtr, 32);
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entry = (DirectoryEntry16)Marshal.PtrToStructure(dirPtr, typeof(DirectoryEntry16));
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Marshal.FreeHGlobal(dirPtr);
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@@ -312,7 +313,7 @@ namespace DiscImageChef.Filesystems.CPM
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else
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{
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DirectoryEntry entry = new DirectoryEntry();
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IntPtr dirPtr = Marshal.AllocHGlobal(32);
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dirPtr = Marshal.AllocHGlobal(32);
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Marshal.Copy(directory, dOff, dirPtr, 32);
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entry = (DirectoryEntry)Marshal.PtrToStructure(dirPtr, typeof(DirectoryEntry));
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Marshal.FreeHGlobal(dirPtr);
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@@ -407,7 +408,7 @@ namespace DiscImageChef.Filesystems.CPM
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else if((directory[dOff] & 0x7F) >= 0x10 && (directory[dOff] & 0x7F) < 0x20)
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{
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PasswordEntry entry = new PasswordEntry();
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IntPtr dirPtr = Marshal.AllocHGlobal(32);
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dirPtr = Marshal.AllocHGlobal(32);
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Marshal.Copy(directory, dOff, dirPtr, 32);
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entry = (PasswordEntry)Marshal.PtrToStructure(dirPtr, typeof(PasswordEntry));
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Marshal.FreeHGlobal(dirPtr);
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@@ -449,162 +450,163 @@ namespace DiscImageChef.Filesystems.CPM
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dirCnt++;
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}
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// Volume label and password entry. Volume password is ignored.
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else if((directory[dOff] & 0x7F) == 0x20)
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{
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LabelEntry entry = new LabelEntry();
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IntPtr dirPtr = Marshal.AllocHGlobal(32);
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Marshal.Copy(directory, dOff, dirPtr, 32);
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entry = (LabelEntry)Marshal.PtrToStructure(dirPtr, typeof(LabelEntry));
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Marshal.FreeHGlobal(dirPtr);
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else switch(directory[dOff] & 0x7F) {
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case 0x20:
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LabelEntry labelEntry;
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dirPtr = Marshal.AllocHGlobal(32);
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Marshal.Copy(directory, dOff, dirPtr, 32);
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labelEntry = (LabelEntry)Marshal.PtrToStructure(dirPtr, typeof(LabelEntry));
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Marshal.FreeHGlobal(dirPtr);
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// The volume label defines if one of the fields in CP/M 3 timestamp is a creation or an access time
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atime |= (entry.flags & 0x40) == 0x40;
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// The volume label defines if one of the fields in CP/M 3 timestamp is a creation or an access time
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atime |= (labelEntry.flags & 0x40) == 0x40;
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label = Encoding.ASCII.GetString(directory, dOff + 1, 11).Trim();
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labelCreationDate = new byte[4];
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labelUpdateDate = new byte[4];
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Array.Copy(directory, dOff + 24, labelCreationDate, 0, 4);
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Array.Copy(directory, dOff + 28, labelUpdateDate, 0, 4);
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label = Encoding.ASCII.GetString(directory, dOff + 1, 11).Trim();
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labelCreationDate = new byte[4];
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labelUpdateDate = new byte[4];
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Array.Copy(directory, dOff + 24, labelCreationDate, 0, 4);
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Array.Copy(directory, dOff + 28, labelUpdateDate, 0, 4);
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// Count entries 3 by 3 for timestamps
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switch(dirCnt % 3)
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{
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case 0:
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file1 = null;
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break;
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case 1:
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file2 = null;
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break;
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case 2:
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file3 = null;
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break;
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}
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dirCnt++;
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break;
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case 0x21:
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if(directory[dOff + 10] == 0x00 && directory[dOff + 20] == 0x00 && directory[dOff + 30] == 0x00 &&
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directory[dOff + 31] == 0x00)
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{
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DateEntry dateEntry;
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dirPtr = Marshal.AllocHGlobal(32);
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Marshal.Copy(directory, dOff, dirPtr, 32);
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dateEntry = (DateEntry)Marshal.PtrToStructure(dirPtr, typeof(DateEntry));
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Marshal.FreeHGlobal(dirPtr);
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FileEntryInfo fInfo;
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// Entry contains timestamps for last 3 entries, whatever the kind they are.
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if(!string.IsNullOrEmpty(file1))
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{
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if(statCache.TryGetValue(file1, out fInfo)) statCache.Remove(file1);
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else fInfo = new FileEntryInfo();
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if(atime) fInfo.AccessTime = DateHandlers.CPMToDateTime(dateEntry.date1);
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else fInfo.CreationTime = DateHandlers.CPMToDateTime(dateEntry.date1);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(dateEntry.date2);
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statCache.Add(file1, fInfo);
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}
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if(!string.IsNullOrEmpty(file2))
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{
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if(statCache.TryGetValue(file2, out fInfo)) statCache.Remove(file2);
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else fInfo = new FileEntryInfo();
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if(atime) fInfo.AccessTime = DateHandlers.CPMToDateTime(dateEntry.date3);
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else fInfo.CreationTime = DateHandlers.CPMToDateTime(dateEntry.date3);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(dateEntry.date4);
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statCache.Add(file2, fInfo);
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}
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if(!string.IsNullOrEmpty(file3))
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{
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if(statCache.TryGetValue(file3, out fInfo)) statCache.Remove(file3);
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else fInfo = new FileEntryInfo();
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if(atime) fInfo.AccessTime = DateHandlers.CPMToDateTime(dateEntry.date5);
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else fInfo.CreationTime = DateHandlers.CPMToDateTime(dateEntry.date5);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(dateEntry.date6);
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statCache.Add(file3, fInfo);
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}
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// Count entries 3 by 3 for timestamps
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switch(dirCnt % 3)
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{
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case 0:
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file1 = null;
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break;
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case 1:
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file2 = null;
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break;
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case 2:
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file3 = null;
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break;
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}
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dirCnt = 0;
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}
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// However, if this byte is 0, timestamp is in Z80DOS or DOS+ format
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else if(directory[dOff + 1] == 0x00)
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{
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TrdPartyDateEntry trdPartyDateEntry;
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dirPtr = Marshal.AllocHGlobal(32);
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Marshal.Copy(directory, dOff, dirPtr, 32);
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trdPartyDateEntry = (TrdPartyDateEntry)Marshal.PtrToStructure(dirPtr, typeof(TrdPartyDateEntry));
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Marshal.FreeHGlobal(dirPtr);
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dirCnt++;
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FileEntryInfo fInfo;
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// Entry contains timestamps for last 3 entries, whatever the kind they are.
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if(!string.IsNullOrEmpty(file1))
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{
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if(statCache.TryGetValue(file1, out fInfo)) statCache.Remove(file1);
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else fInfo = new FileEntryInfo();
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byte[] ctime = new byte[4];
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ctime[0] = trdPartyDateEntry.create1[0];
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ctime[1] = trdPartyDateEntry.create1[1];
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fInfo.AccessTime = DateHandlers.CPMToDateTime(trdPartyDateEntry.access1);
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fInfo.CreationTime = DateHandlers.CPMToDateTime(ctime);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(trdPartyDateEntry.modify1);
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statCache.Add(file1, fInfo);
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}
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if(!string.IsNullOrEmpty(file2))
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{
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if(statCache.TryGetValue(file2, out fInfo)) statCache.Remove(file2);
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else fInfo = new FileEntryInfo();
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byte[] ctime = new byte[4];
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ctime[0] = trdPartyDateEntry.create2[0];
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ctime[1] = trdPartyDateEntry.create2[1];
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fInfo.AccessTime = DateHandlers.CPMToDateTime(trdPartyDateEntry.access2);
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fInfo.CreationTime = DateHandlers.CPMToDateTime(ctime);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(trdPartyDateEntry.modify2);
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statCache.Add(file2, fInfo);
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}
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if(!string.IsNullOrEmpty(file3))
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{
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if(statCache.TryGetValue(file1, out fInfo)) statCache.Remove(file3);
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else fInfo = new FileEntryInfo();
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byte[] ctime = new byte[4];
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ctime[0] = trdPartyDateEntry.create3[0];
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ctime[1] = trdPartyDateEntry.create3[1];
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fInfo.AccessTime = DateHandlers.CPMToDateTime(trdPartyDateEntry.access3);
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fInfo.CreationTime = DateHandlers.CPMToDateTime(ctime);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(trdPartyDateEntry.modify3);
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statCache.Add(file3, fInfo);
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}
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file1 = null;
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file2 = null;
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file3 = null;
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dirCnt = 0;
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}
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break;
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}
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// Timestamp entry
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else if((directory[dOff] & 0x7F) == 0x21)
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if(directory[dOff + 10] == 0x00 && directory[dOff + 20] == 0x00 && directory[dOff + 30] == 0x00 &&
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directory[dOff + 31] == 0x00)
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{
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DateEntry entry = new DateEntry();
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IntPtr dirPtr = Marshal.AllocHGlobal(32);
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Marshal.Copy(directory, dOff, dirPtr, 32);
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entry = (DateEntry)Marshal.PtrToStructure(dirPtr, typeof(DateEntry));
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Marshal.FreeHGlobal(dirPtr);
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FileEntryInfo fInfo;
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// Entry contains timestamps for last 3 entries, whatever the kind they are.
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if(!string.IsNullOrEmpty(file1))
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{
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if(statCache.TryGetValue(file1, out fInfo)) statCache.Remove(file1);
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else fInfo = new FileEntryInfo();
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if(atime) fInfo.AccessTime = DateHandlers.CPMToDateTime(entry.date1);
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else fInfo.CreationTime = DateHandlers.CPMToDateTime(entry.date1);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(entry.date2);
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statCache.Add(file1, fInfo);
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}
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if(!string.IsNullOrEmpty(file2))
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{
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if(statCache.TryGetValue(file2, out fInfo)) statCache.Remove(file2);
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else fInfo = new FileEntryInfo();
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if(atime) fInfo.AccessTime = DateHandlers.CPMToDateTime(entry.date3);
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else fInfo.CreationTime = DateHandlers.CPMToDateTime(entry.date3);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(entry.date4);
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statCache.Add(file2, fInfo);
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}
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if(!string.IsNullOrEmpty(file3))
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{
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if(statCache.TryGetValue(file3, out fInfo)) statCache.Remove(file3);
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else fInfo = new FileEntryInfo();
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if(atime) fInfo.AccessTime = DateHandlers.CPMToDateTime(entry.date5);
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else fInfo.CreationTime = DateHandlers.CPMToDateTime(entry.date5);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(entry.date6);
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statCache.Add(file3, fInfo);
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}
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file1 = null;
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file2 = null;
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file3 = null;
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dirCnt = 0;
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}
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// However, if this byte is 0, timestamp is in Z80DOS or DOS+ format
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else if(directory[dOff + 1] == 0x00)
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{
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TrdPartyDateEntry entry = new TrdPartyDateEntry();
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IntPtr dirPtr = Marshal.AllocHGlobal(32);
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Marshal.Copy(directory, dOff, dirPtr, 32);
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entry = (TrdPartyDateEntry)Marshal.PtrToStructure(dirPtr, typeof(TrdPartyDateEntry));
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Marshal.FreeHGlobal(dirPtr);
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FileEntryInfo fInfo;
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// Entry contains timestamps for last 3 entries, whatever the kind they are.
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if(!string.IsNullOrEmpty(file1))
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{
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if(statCache.TryGetValue(file1, out fInfo)) statCache.Remove(file1);
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else fInfo = new FileEntryInfo();
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byte[] ctime = new byte[4];
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ctime[0] = entry.create1[0];
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ctime[1] = entry.create1[1];
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fInfo.AccessTime = DateHandlers.CPMToDateTime(entry.access1);
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fInfo.CreationTime = DateHandlers.CPMToDateTime(ctime);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(entry.modify1);
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statCache.Add(file1, fInfo);
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}
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if(!string.IsNullOrEmpty(file2))
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{
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if(statCache.TryGetValue(file2, out fInfo)) statCache.Remove(file2);
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else fInfo = new FileEntryInfo();
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byte[] ctime = new byte[4];
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ctime[0] = entry.create2[0];
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ctime[1] = entry.create2[1];
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fInfo.AccessTime = DateHandlers.CPMToDateTime(entry.access2);
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fInfo.CreationTime = DateHandlers.CPMToDateTime(ctime);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(entry.modify2);
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statCache.Add(file2, fInfo);
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}
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if(!string.IsNullOrEmpty(file3))
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{
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if(statCache.TryGetValue(file1, out fInfo)) statCache.Remove(file3);
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else fInfo = new FileEntryInfo();
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byte[] ctime = new byte[4];
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ctime[0] = entry.create3[0];
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ctime[1] = entry.create3[1];
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fInfo.AccessTime = DateHandlers.CPMToDateTime(entry.access3);
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fInfo.CreationTime = DateHandlers.CPMToDateTime(ctime);
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fInfo.LastWriteTime = DateHandlers.CPMToDateTime(entry.modify3);
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statCache.Add(file3, fInfo);
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}
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file1 = null;
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file2 = null;
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file3 = null;
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dirCnt = 0;
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}
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// Cache all files. As CP/M maximum volume size is 8 Mib
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// this should not be a problem
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Block a user