protected override void Dispose(bool disposing)
{
if (IsOpen)
{
IOPrimitives.CloseFile(fileHandle);
fileHandle = null;
}
}
/// <inheritdoc/>
public override void Write(byte[] buffer, int offset, int count)
{
CheckReadArgs(buffer, offset, count);
EnsureWriteable();
ulong bytesWritten = IOPrimitives.WriteToFile(&buffer[offset], (ulong)count, fileHandle);
if (bytesWritten < (ulong)count)
{
throw new IOException("Wrote only " + bytesWritten + " of " + count + " bytes.");
}
}
/// <inheritdoc/>
public override long Seek(long offset, SeekOrigin origin)
{
EnsureOpen();
var error = IOPrimitives.FileSeek(fileHandle, offset, (int)origin);
if (error != 0)
{
throw new IOException(
"Cannot seek to position at offset '" + offset +
"' from the " + SeekOriginToString(origin) +
". Error code: '" + error + "'.");
}
return(Position);
}
private static void *OpenFile(string name, string mode)
{
IntPtr nameCStr = Marshal.StringToHGlobalAnsi(name);
IntPtr modeCStr = Marshal.StringToHGlobalAnsi(mode);
void *handle = IOPrimitives.OpenFile(
(byte *)nameCStr.ToPointer(),
(byte *)modeCStr.ToPointer());
Marshal.FreeHGlobal(modeCStr);
Marshal.FreeHGlobal(nameCStr);
return(handle);
}
public static void HandleFatalException(Exception ex)
{
// We can't use the Console class here (because it is
// defined in a library that depends on this one).
// Instead, we'll use IO primitives, which have the
// added advantage of being leaner.
var errorMessage = Marshal.StringToHGlobalAnsi(
"error: a fatal exception was thrown." + NewLine +
"Exception message: " + ex.Message + NewLine);
IOPrimitives.WriteCStringToFile(
(byte *)errorMessage.ToPointer(),
IOPrimitives.StandardErrorFile);
Marshal.FreeHGlobal(errorMessage);
}
public void WhenConvertingTextToWindowsLineBreaks()
{
IOPrimitives.convertTextToWindowsLineBreaks("\rMy text\n\ris from different os versions\r\nbut thats ok\treally")
.ShouldEqual("\r\nMy text\r\n\r\nis from different os versions\r\nbut thats ok\treally");
}
/// <inheritdoc/>
public override int Read(byte[] buffer, int offset, int count)
{
CheckReadArgs(buffer, offset, count);
EnsureReadable();
return((int)IOPrimitives.ReadFromFile(&buffer[offset], (ulong)count, fileHandle));
}
/// <inheritdoc/>
public override void Flush()
{
EnsureOpen();
IOPrimitives.FlushFile(fileHandle);
}
