public static IntPtr Open(String filename, FileMode mode, FileAccess access, FileShare share)
{
var fileHandle = WindowsNativeMethods.CreateFile(filename, access, share,
IntPtr.Zero, mode, FileAttributes.Normal, IntPtr.Zero);
if (fileHandle == INVALID_HANDLE_VALUE)
{
throw new Exception(String.Format("CreateFile '{0}' (mode={1}, access={2}, share={3}) failed (error={4})",
filename, mode, access, share, WindowsNativeMethods.GetLastError()));
}
return(fileHandle);
}
public unsafe void Put(byte *data, uint length)
{
if (length <= SmallEnoughToBuffer)
{
if (bufferedLength + length > buffer.Length)
{
Flush();
}
// TODO: call a native function to perform the copy
for (uint i = 0; i < length; i++)
{
buffer[bufferedLength + i] = data[i];
}
bufferedLength += length;
}
else
{
Flush();
UInt32 written;
if (false == WindowsNativeMethods.WriteFile(fileHandle, data, length, out written, IntPtr.Zero))
{
throw new IOException(String.Format("WriteFile({0} bytes) failed (error={1})", length, WindowsNativeMethods.GetLastError()));
}
if (written != length)
{
throw new IOException(String.Format("Only wrote {0} out of {1}", written, length));
}
}
}
public void Flush()
{
if (bufferedLength > 0)
{
UInt32 written;
if (false == WindowsNativeMethods.WriteFile(fileHandle, buffer, bufferedLength, out written, IntPtr.Zero))
{
throw new IOException(String.Format("WriteFile({0} bytes) failed (error={1})", bufferedLength, WindowsNativeMethods.GetLastError()));
}
if (written != bufferedLength)
{
throw new IOException(String.Format("Only wrote {0} out of {1}", written, bufferedLength));
}
//Console.WriteLine("Flushed {0} bytes:", bufferedLength);
//Console.WriteLine("{0}", System.Text.Encoding.UTF8.GetString(buffer, 0, (int)bufferedLength));
bufferedLength = 0;
}
}