/// <summary>
/// Creates file for write
/// </summary>
/// <param name="in_data">Function parameter bytes</param>
private void CasCreate(byte in_data)
{
if (m_write_data_index == 0)
{
m_filename_length_param = in_data;
m_filename_param = "";
}
// store filename character
int filename_index = m_write_data_index - 1;
if (filename_index >= 0 && filename_index < m_filename_length_param)
{
m_filename_param += (char)in_data;
}
// if last character is received
if (filename_index + 1 == m_filename_length_param)
{
// create file
if (m_write_file == null)
{
string filename = GetFilePath(m_filename_param);
if (File.Exists(filename))
{
EndFunction(CoProcessorConstants.ERR_FILE_EXISTS);
}
else
{
if (!Directory.Exists(Path.GetDirectoryName(filename)))
{
EndFunction(CoProcessorConstants.ERR_NO_PATH);
}
else
{
// try to create file
try
{
m_write_stream = File.Open(filename, FileMode.Create, FileAccess.ReadWrite);
m_write_file = new BinaryWriter(m_write_stream);
// In case of CAS file write UPM header
if (string.Compare(Path.GetExtension(filename), ".CAS", true) == 0)
{
m_write_mode = FileWriteMode.CASFile;
// create and write empty upm header (close will update it)
TVCFileTypes.CASUPMHeaderType upm_header = new TVCFileTypes.CASUPMHeaderType();
upm_header.FileType = TVCFileTypes.CASBlockHeaderFileUnbuffered;
upm_header.CopyProtect = 0;
upm_header.BlockNumber = 0;
upm_header.LastBlockBytes = 0;
m_write_file.Write(upm_header);
}
else
{
m_write_mode = FileWriteMode.File;
}
// gererate result file name
filename = Path.GetFileNameWithoutExtension(filename);
m_filename_param = TVCCharacterCodePage.UNICODEStringToTVCString(filename);
SetReadResult(CoProcessorReadFilename);
}
catch
{
EndFunction(CoProcessorConstants.ERR_FILE_EXISTS);
}
}
}
}
else
{
// if file is already created
EndFunction(CoProcessorConstants.ERR_ALREADY_OPENED);
}
}
m_write_data_index++;
}
/// <summary>
/// Opens file for reading
/// </summary>
/// <param name="in_data">Function parameter bytes</param>
private void CasOpen(byte in_data)
{
if (m_write_data_index == 0)
{
m_filename_length_param = in_data;
m_filename_param = "";
}
// store filename character
int filename_index = m_write_data_index - 1;
if (filename_index >= 0 && filename_index < m_filename_length_param)
{
m_filename_param += (char)in_data;
}
// if last character is received
if (filename_index + 1 == m_filename_length_param)
{
if (m_filename_param == "+")
{
m_read_mode = FileReadMode.Directory;
m_directory_file.Open();
m_filename_param = "+";
SetReadResult(CoProcessorReadFilename);
}
else
{
if (m_read_stream == null)
{
// Last filename character received
m_read_mode = FileReadMode.File;
string filename;
if (m_filename_length_param == 0)
{
filename = GetFilePath("start");
}
else
{
filename = GetFilePath(m_filename_param);
}
if (!File.Exists(filename))
{
EndFunction(CoProcessorConstants.ERR_FILE_NOT_FOUND);
}
else
{
if (!Directory.Exists(Path.GetDirectoryName(filename)))
{
EndFunction(CoProcessorConstants.ERR_NO_PATH);
}
else
{
// try to open the file
try
{
m_read_stream = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
m_read_file = new BinaryReader(m_read_stream);
// In case of CAS file skip UPM header
if (string.Compare(Path.GetExtension(filename), ".CAS", true) == 0)
{
m_read_stream.Seek(Marshal.SizeOf(typeof(TVCFileTypes.CASUPMHeaderType)), SeekOrigin.Begin);
}
// generate result file name
filename = Path.GetFileName(filename);
if (filename.Length < m_filename_length_param)
{
m_filename_length_param = filename.Length;
}
m_filename_param = TVCCharacterCodePage.UNICODEStringToTVCString(filename);
SetReadResult(CoProcessorReadFilename);
}
catch
{
EndFunction(CoProcessorConstants.ERR_FILE_NOT_FOUND);
}
}
}
}
else
{
// if file is already created
EndFunction(CoProcessorConstants.ERR_ALREADY_OPENED);
}
}
}
m_write_data_index++;
}