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/*
* [The "BSD licence"]
* Copyright (c) 2005-2008 Terence Parr
* All rights reserved.
*
* Conversion to C#:
* Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
namespace Antlr.Runtime
{
using TextReader = System.IO.TextReader;
/** <summary>
* Vacuum all input from a Reader and then treat it like a StringStream.
* Manage the buffer manually to avoid unnecessary data copying.
* </summary>
*
* <remarks>
* If you need encoding, use ANTLRInputStream.
* </remarks>
*/
[System.Serializable]
public class ANTLRReaderStream : ANTLRStringStream
{
public const int ReadBufferSize = 1024;
public const int InitialBufferSize = 1024;
public ANTLRReaderStream( TextReader r )
: this( r, InitialBufferSize, ReadBufferSize )
{
}
public ANTLRReaderStream( TextReader r, int size )
: this( r, size, ReadBufferSize )
{
}
public ANTLRReaderStream( TextReader r, int size, int readChunkSize )
{
Load( r, size, readChunkSize );
}
public virtual void Load( TextReader r, int size, int readChunkSize )
{
if ( r == null )
{
return;
}
if ( size <= 0 )
{
size = InitialBufferSize;
}
if ( readChunkSize <= 0 )
{
readChunkSize = ReadBufferSize;
}
// System.out.println("load "+size+" in chunks of "+readChunkSize);
try
{
data = r.ReadToEnd().ToCharArray();
base.n = data.Length;
}
finally
{
r.Close();
}
}
}
}
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