imported brians code

[nestedvm.git] / src / org / xwt / mips / util / SeekableFile.java

diff --git a/src/org/xwt/mips/util/SeekableFile.java b/src/org/xwt/mips/util/SeekableFile.java
new file mode 100644 (file)
index 0000000..168d43a
--- /dev/null
+++ b/src/org/xwt/mips/util/SeekableFile.java
@@ -0,0 +1,24 @@
+package org.xwt.mips.util;
+
+import java.io.*;
+
+public class SeekableFile implements SeekableData {
+    private final RandomAccessFile raf;
+    
+    public SeekableFile(String fileName) throws IOException { this(fileName,false); }
+    public SeekableFile(String fileName, boolean writable) throws IOException { this(new File(fileName),writable); }    
+    
+    public SeekableFile(File file, boolean writable) throws IOException {
+        raf = new RandomAccessFile(file,writable ? "rw" : "r");
+    }
+    
+    // NOTE: RandomAccessFile.setLength() is a Java2 function
+    public void setLength(int n) throws IOException { raf.setLength(n); }
+    
+    public int read(byte[] buf, int offset, int length) throws IOException { return raf.read(buf,offset,length); }
+    public int write(byte[] buf, int offset, int length) throws IOException { raf.write(buf,offset,length); return length; }
+    public void seek(int pos) throws IOException{ raf.seek(pos); }
+    public int pos()  throws IOException { return (int) raf.getFilePointer(); }
+    public int length() throws IOException { return (int)raf.length(); }
+    public void close() throws IOException { raf.close(); }
+}