// Copy the data from the Stream to the array buffer.
// If the SqlChars doesn't hold a buffer or the buffer
// is not big enough, allocate new char array.
private void CopyStreamToBuffer()
{
Debug.Assert(FStream());
long lStreamLen = m_stream.Length;
if (lStreamLen >= x_lMaxLen)
{
throw new SqlTypeException(Res.GetString(Res.SqlMisc_BufferInsufficientMessage));
}
if (m_rgchBuf == null || m_rgchBuf.Length < lStreamLen)
{
m_rgchBuf = new char[lStreamLen];
}
if (m_stream.Position != 0)
{
m_stream.Seek(0, SeekOrigin.Begin);
}
m_stream.Read(m_rgchBuf, 0, (int)lStreamLen);
m_stream = null;
_lCurLen = lStreamLen;
_state = SqlBytesCharsState.Buffer;
AssertValid();
}
// --------------------------------------------------------------
// Public methods
// --------------------------------------------------------------
public void SetNull()
{
_lCurLen = x_lNull;
m_stream = null;
_state = SqlBytesCharsState.Null;
AssertValid();
}
// Create a SqlChars from a SqlStreamChars
internal SqlChars(SqlStreamChars s)
{
m_rgchBuf = null;
_lCurLen = x_lNull;
m_stream = s;
_state = (s == null) ? SqlBytesCharsState.Null : SqlBytesCharsState.Stream;
_rgchWorkBuf = null;
AssertValid();
}
// Create a SqlChars with an in-memory buffer
public SqlChars(char[] buffer)
{
m_rgchBuf = buffer;
m_stream = null;
if (m_rgchBuf == null)
{
_state = SqlBytesCharsState.Null;
_lCurLen = x_lNull;
}
else
{
_state = SqlBytesCharsState.Buffer;
_lCurLen = (long)m_rgchBuf.Length;
}
_rgchWorkBuf = null;
AssertValid();
}