public static void LoadFile(string path, Action<string, Stream> onSuccessfulLoad, TextWriter errorOut)
{
const string ioExceptionPreamble = "Could not read program file due to an IO Exception.";
FileStream fileStream = null;
try
{
fileStream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read, fileBufferSize, true);
}
catch (FileNotFoundException fileNotFoundException)
{
errorOut.WriteLine("Could not read program file." + fileNotFoundException.Message);
return;
}
catch (IOException ioException)
{
errorOut.Write(ioExceptionPreamble + ioException.Message);
return;
}
LoadState loadState = new LoadState(fileBufferSize);
int bytesRead = -1;
Func<bool> iterate = null;
AsyncCallback onEndRead = null;
Action onLoadComplete = null;
iterate = () =>
{
while (bytesRead != 0)
{
IAsyncResult result = fileStream.BeginRead(loadState.ReadBuffer, 0, fileBufferSize, onEndRead, null);
if (!result.CompletedSynchronously)
{
return false;
}
bytesRead = fileStream.EndRead(result);
loadState.FlushReadBuffer(bytesRead);
}
return true;
};
onEndRead = (ar) =>
{
if (!ar.CompletedSynchronously)
{
try
{
bytesRead = fileStream.EndRead(ar);
loadState.FlushReadBuffer(bytesRead);
if (iterate())
{
onLoadComplete();
}
}
catch (IOException ioException)
{
errorOut.Write(ioExceptionPreamble + ioException.Message);
fileStream.Close();
}
catch
{
fileStream.Close();
throw;
}
}
};
onLoadComplete = () =>
{
fileStream.Close();
loadState.BufferedFile.Seek(0, SeekOrigin.Begin);
onSuccessfulLoad(path, loadState.BufferedFile);
};
try
{
if (iterate())
{
onLoadComplete();
}
}
catch (IOException ioException)
{
errorOut.Write(ioExceptionPreamble + ioException.Message);
fileStream.Close();
}
catch
{
fileStream.Close();
throw;
}
}
public static void LoadFile(string path, Action <string, Stream> onSuccessfulLoad, TextWriter errorOut)
{
const string ioExceptionPreamble = "Could not read program file due to an IO Exception.";
FileStream fileStream = null;
try
{
fileStream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read, fileBufferSize, true);
}
catch (FileNotFoundException fileNotFoundException)
{
errorOut.WriteLine("Could not read program file." + fileNotFoundException.Message);
return;
}
catch (IOException ioException)
{
errorOut.Write(ioExceptionPreamble + ioException.Message);
return;
}
LoadState loadState = new LoadState(fileBufferSize);
int bytesRead = -1;
Func <bool> iterate = null;
AsyncCallback onEndRead = null;
Action onLoadComplete = null;
iterate = () =>
{
while (bytesRead != 0)
{
IAsyncResult result = fileStream.BeginRead(loadState.ReadBuffer, 0, fileBufferSize, onEndRead, null);
if (!result.CompletedSynchronously)
{
return(false);
}
bytesRead = fileStream.EndRead(result);
loadState.FlushReadBuffer(bytesRead);
}
return(true);
};
onEndRead = (ar) =>
{
if (!ar.CompletedSynchronously)
{
try
{
bytesRead = fileStream.EndRead(ar);
loadState.FlushReadBuffer(bytesRead);
if (iterate())
{
onLoadComplete();
}
}
catch (IOException ioException)
{
errorOut.Write(ioExceptionPreamble + ioException.Message);
fileStream.Close();
}
catch
{
fileStream.Close();
throw;
}
}
};
onLoadComplete = () =>
{
fileStream.Close();
loadState.BufferedFile.Seek(0, SeekOrigin.Begin);
onSuccessfulLoad(path, loadState.BufferedFile);
};
try
{
if (iterate())
{
onLoadComplete();
}
}
catch (IOException ioException)
{
errorOut.Write(ioExceptionPreamble + ioException.Message);
fileStream.Close();
}
catch
{
fileStream.Close();
throw;
}
}