public CasetteStream(IDeviceMapping deviceMap, String tiFileName, FileType fileType,
FileOpenMode fileMode, int recSize)
{
String nativeFileName = deviceMap.GetNativeFileName(tiFileName);
if (recordSize > allowableRecordSizes[allowableRecordSizes.Length-1]) throw new ArgumentOutOfRangeException("recordSize");
if (fileType == FileType.Display) throw new NotImplementedException("Display mode not yet supported");
foreach(int i in allowableRecordSizes)
{
if (i > recSize)
{
this.recordSize = i;
break;
}
}
this.fileType = fileType;
this.fileMode = fileMode;
if (this.fileMode == FileOpenMode.Output)
{
CreateBuffer();
stream = NativeFile.Open(nativeFileName, FileMode.Create, FileAccess.Write, FileShare.Read);
}
else
{
buffer = new byte[this.recordSize];
stream = NativeFile.Open(nativeFileName, FileMode.Open, FileAccess.Read, FileShare.Read);
}
}
public static File Open(IDeviceMapping deviceMap, String fileName, FileOrganization org, FileType fileType,
FileOpenMode mode, FileRecordType recordType)
{
return new File(deviceMap, fileName, org, fileType, mode, recordType);
}
private File(IDeviceMapping deviceMap, String fileName, FileOrganization org, FileType fileType,
FileOpenMode mode, FileRecordType recordType)
{
//if (fileName != CS1 && fileName != CS2) throw new InvalidOperationException("Only fileNames of CS1 and CS2 are currently supported");
String nativeFileName = deviceMap.GetNativeFileName(fileName);
//if (fileName == CS2 && mode == FileOpenMode.Input) throw new InvalidOperationException("Can't use CS2 for Input");
if (org != FileOrganization.Sequential) throw new InvalidOperationException("CS1 and CS2 only support sequential");
if (recordType != FileRecordType.Fixed) throw new InvalidOperationException("CS1 and CS2 only support Fixed");
if (fileType != FileType.Internal) throw new NotImplementedException("Internal is preferred for casettes, Display is not yet implemented.");
if (mode == FileOpenMode.Input)
{
FileStream stream = NativeFile.Open(nativeFileName, FileMode.Open, FileAccess.Read, FileShare.Read);
reader = new StreamReader(stream, encoding);
}
else
{
FileStream stream = NativeFile.Open(nativeFileName, FileMode.Create, FileAccess.Write, FileShare.Read);
writer = new StreamWriter(stream, encoding);
writer.AutoFlush = true;
}
isCasette = true;
}
