internal unsafe void AppendExtraBuffer(byte *buffer, int bufferLength)
{
// Then convert the bytes to chars
int charLen = CurrentEncoding.GetMaxCharCount(bufferLength);
char *charPtr = stackalloc char[charLen];
charLen = CurrentEncoding.GetChars(buffer, bufferLength, charPtr, charLen);
// Ensure our buffer is large enough to hold all of the data
if (IsUnprocessedBufferEmpty())
{
_startIndex = _endIndex = 0;
}
else
{
Debug.Assert(_endIndex > 0);
int spaceRemaining = _unprocessedBufferToBeRead.Length - _endIndex;
if (spaceRemaining < charLen)
{
Array.Resize(ref _unprocessedBufferToBeRead, _unprocessedBufferToBeRead.Length * 2);
}
}
// Copy the data into our buffer
Marshal.Copy((IntPtr)charPtr, _unprocessedBufferToBeRead, _endIndex, charLen);
_endIndex += charLen;
}
/// <summary> Reads the buffer in the raw mode. </summary>
unsafe void ReadExtraBuffer()
{
Debug.Assert(IsExtraBufferEmpty());
byte *bufPtr = stackalloc byte[BytesToBeRead];
int result;
Interop.CheckIo(result = Interop.Sys.ReadStdinUnbuffered(bufPtr, BytesToBeRead));
Debug.Assert(result > 0 && result <= BytesToBeRead);
// Now we need to convert the byte buffer to char buffer.
fixed(char *unprocessedBufPtr = _unprocessedBufferToBeRead)
{
_startIndex = 0;
_endIndex = CurrentEncoding.GetChars(bufPtr, result, unprocessedBufPtr, _unprocessedBufferToBeRead.Length) - 1;
}
}