1 files changed, 78 insertions, 0 deletions
diff --git a/antlr-3.4/runtime/Java/src/main/java/org/antlr/runtime/ANTLRFileStream.java b/antlr-3.4/runtime/Java/src/main/java/org/antlr/runtime/ANTLRFileStream.java
new file mode 100644
index 0000000..27ef58b
--- /dev/null
+++ b/antlr-3.4/runtime/Java/src/main/java/org/antlr/runtime/ANTLRFileStream.java
@@ -0,0 +1,78 @@
+/*
+ [The "BSD license"]
+ Copyright (c) 2005-2009 Terence Parr
+ 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.
+ */
+package org.antlr.runtime;
+
+import java.io.*;
+
+/** This is a char buffer stream that is loaded from a file
+ *  all at once when you construct the object.  This looks very
+ *  much like an ANTLReader or ANTLRInputStream, but it's a special case
+ *  since we know the exact size of the object to load.  We can avoid lots
+ *  of data copying. 
+ */
+public class ANTLRFileStream extends ANTLRStringStream {
+	protected String fileName;
+
+	public ANTLRFileStream(String fileName) throws IOException {
+		this(fileName, null);
+	}
+
+	public ANTLRFileStream(String fileName, String encoding) throws IOException {
+		this.fileName = fileName;
+		load(fileName, encoding);
+	}
+
+	public void load(String fileName, String encoding)
+		throws IOException
+	{
+		if ( fileName==null ) {
+			return;
+		}
+		File f = new File(fileName);
+		int size = (int)f.length();
+		InputStreamReader isr;
+		FileInputStream fis = new FileInputStream(fileName);
+		if ( encoding!=null ) {
+			isr = new InputStreamReader(fis, encoding);
+		}
+		else {
+			isr = new InputStreamReader(fis);
+		}
+		try {
+			data = new char[size];
+			super.n = isr.read(data);
+		}
+		finally {
+			isr.close();
+		}
+	}
+
+	public String getSourceName() {
+		return fileName;
+	}
+}