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