1 files changed, 93 insertions, 0 deletions
diff --git a/runtime/CSharp3/Sources/Antlr3.Runtime/ANTLRReaderStream.cs b/runtime/CSharp3/Sources/Antlr3.Runtime/ANTLRReaderStream.cs
new file mode 100644
index 0000000..b8ecc26
--- /dev/null
+++ b/runtime/CSharp3/Sources/Antlr3.Runtime/ANTLRReaderStream.cs
@@ -0,0 +1,93 @@
+/*
+ * [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();
+            }
+        }
+    }
+}