| /* |
| * [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(); |
| } |
| } |
| } |
| } |