1 /* 2 * [The "BSD licence"] 3 * Copyright (c) 2005-2008 Terence Parr 4 * All rights reserved. 5 * 6 * Conversion to C#: 7 * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 namespace Antlr.Runtime { 34 using TextReader = System.IO.TextReader; 35 36 /** <summary> 37 * Vacuum all input from a Reader and then treat it like a StringStream. 38 * Manage the buffer manually to avoid unnecessary data copying. 39 * </summary> 40 * 41 * <remarks> 42 * If you need encoding, use ANTLRInputStream. 43 * </remarks> 44 */ 45 [System.Serializable] 46 public class ANTLRReaderStream : ANTLRStringStream { 47 public const int ReadBufferSize = 1024; 48 public const int InitialBufferSize = 1024; 49 ANTLRReaderStream(TextReader r)50 public ANTLRReaderStream(TextReader r) 51 : this(r, InitialBufferSize, ReadBufferSize) { 52 } 53 ANTLRReaderStream(TextReader r, int size)54 public ANTLRReaderStream(TextReader r, int size) 55 : this(r, size, ReadBufferSize) { 56 } 57 ANTLRReaderStream(TextReader r, int size, int readChunkSize)58 public ANTLRReaderStream(TextReader r, int size, int readChunkSize) { 59 Load(r, size, readChunkSize); 60 } 61 Load(TextReader r, int size, int readChunkSize)62 public virtual void Load(TextReader r, int size, int readChunkSize) { 63 if (r == null) { 64 return; 65 } 66 if (size <= 0) { 67 size = InitialBufferSize; 68 } 69 if (readChunkSize <= 0) { 70 readChunkSize = ReadBufferSize; 71 } 72 // System.out.println("load "+size+" in chunks of "+readChunkSize); 73 try { 74 data = r.ReadToEnd().ToCharArray(); 75 base.n = data.Length; 76 } finally { 77 r.Close(); 78 } 79 } 80 } 81 } 82