private java.nio.CharBuffer allocateMore(java.nio.CharBuffer output)
{
if (output.capacity() == 0)
{
return(java.nio.CharBuffer.allocate(1));
}
java.nio.CharBuffer result = java.nio.CharBuffer.allocate(output.capacity() * 2);
output.flip();
result.put(output);
return(result);
}
public virtual int read(java.nio.CharBuffer target)
{
int length = target.Length;
char[] buf = new char[length];
length = System.Math.Min(length, read(buf));
if (length > 0)
{
target.put(buf, 0, length);
}
return(length);
}
/// <summary>
/// Decodes bytes starting at the current position of the given input buffer,
/// and writes the equivalent character sequence into the given output buffer
/// from its current position.
/// </summary>
/// <remarks>
/// Decodes bytes starting at the current position of the given input buffer,
/// and writes the equivalent character sequence into the given output buffer
/// from its current position.
/// <p>
/// The buffers' position will be changed with the reading and writing
/// operation, but their limits and marks will be kept intact.
/// <p>
/// A <code>CoderResult</code> instance will be returned according to
/// following rules:
/// <ul>
/// <li>
/// <see cref="CoderResult.OVERFLOW">CoderResult.OVERFLOW</see>
/// indicates that
/// even though not all of the input has been processed, the buffer the
/// output is being written to has reached its capacity. In the event of this
/// code being returned this method should be called once more with an
/// <code>out</code> argument that has not already been filled.</li>
/// <li>
/// <see cref="CoderResult.UNDERFLOW">CoderResult.UNDERFLOW</see>
/// indicates that
/// as many bytes as possible in the input buffer have been decoded. If there
/// is no further input and no remaining bytes in the input buffer then this
/// operation may be regarded as complete. Otherwise, this method should be
/// called once more with additional input.</li>
/// <li>A
/// <see cref="CoderResult.malformedForLength(int)">malformed input</see>
/// result
/// indicates that some malformed input error has been encountered, and the
/// erroneous bytes start at the input buffer's position and their number can
/// be got by result's
/// <see cref="CoderResult.length()">length</see>
/// . This kind of
/// result can be returned only if the malformed action is
/// <see cref="CodingErrorAction.REPORT">CodingErrorAction.REPORT</see>
/// . </li>
/// <li>A
/// <see cref="CoderResult.unmappableForLength(int)">unmappable character</see>
/// result indicates that some unmappable character error has been
/// encountered, and the erroneous bytes start at the input buffer's position
/// and their number can be got by result's
/// <see cref="CoderResult.length()">length</see>
/// . This kind of result can be returned
/// only if the unmappable character action is
/// <see cref="CodingErrorAction.REPORT">CodingErrorAction.REPORT</see>
/// . </li>
/// </ul>
/// <p>
/// The <code>endOfInput</code> parameter indicates that the invoker cannot
/// provide further input. This parameter is true if and only if the bytes in
/// current input buffer are all inputs for this decoding operation. Note
/// that it is common and won't cause an error if the invoker sets false and
/// then can't provide more input, while it may cause an error if the invoker
/// always sets true in several consecutive invocations. This would make the
/// remaining input to be treated as malformed input.
/// <p>
/// This method invokes the
/// <see cref="decodeLoop(java.nio.ByteBuffer, java.nio.CharBuffer)">decodeLoop</see>
/// method to
/// implement the basic decode logic for a specific charset.
/// </remarks>
/// <param name="in">the input buffer.</param>
/// <param name="out">the output buffer.</param>
/// <param name="endOfInput">true if all the input characters have been provided.</param>
/// <returns>
/// a <code>CoderResult</code> instance which indicates the reason
/// of termination.
/// </returns>
/// <exception cref="System.InvalidOperationException">
/// if decoding has started or no more input is needed in this
/// decoding progress.
/// </exception>
/// <exception cref="CoderMalfunctionError">
/// if the
/// <see cref="decodeLoop(java.nio.ByteBuffer, java.nio.CharBuffer)">decodeLoop</see>
/// method threw an <code>BufferUnderflowException</code> or
/// <code>BufferOverflowException</code>.
/// </exception>
public java.nio.charset.CoderResult decode(java.nio.ByteBuffer @in, java.nio.CharBuffer
@out, bool endOfInput)
{
if ((status == FLUSH) || (!endOfInput && status == END))
{
throw new System.InvalidOperationException();
}
java.nio.charset.CoderResult result = null;
// begin to decode
while (true)
{
java.nio.charset.CodingErrorAction action = null;
try
{
result = decodeLoop(@in, @out);
}
catch (java.nio.BufferOverflowException ex)
{
// unexpected exception
throw new java.nio.charset.CoderMalfunctionError(ex);
}
catch (java.nio.BufferUnderflowException ex)
{
// unexpected exception
throw new java.nio.charset.CoderMalfunctionError(ex);
}
if (result.isUnderflow())
{
int remaining = @in.remaining();
status = endOfInput ? END : ONGOING;
if (endOfInput && remaining > 0)
{
result = java.nio.charset.CoderResult.malformedForLength(remaining);
}
else
{
return(result);
}
}
if (result.isOverflow())
{
return(result);
}
// set coding error handle action
action = _malformedInputAction;
if (result.isUnmappable())
{
action = _unmappableCharacterAction;
}
// If the action is IGNORE or REPLACE, we should continue decoding.
if (action == java.nio.charset.CodingErrorAction.REPLACE)
{
if (@out.remaining() < replacementChars.Length)
{
return(java.nio.charset.CoderResult.OVERFLOW);
}
@out.put(replacementChars);
}
else
{
if (action != java.nio.charset.CodingErrorAction.IGNORE)
{
return(result);
}
}
@in.position(@in.position() + result.length());
}
}