Fix javac --incremental by using jmake for dependency analysis

third_party/jmake/src/org/pantsbuild/jmake/BinaryFileReader.java

+/* Copyright (c) 2002-2008 Sun Microsystems, Inc. All rights reserved
+ *
+ * This program is distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+package org.pantsbuild.jmake;
+
+import java.io.DataInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+
+/**
+ * Basic operations for reading a byte array representing a binary file.
+ *
+ * @author  Misha Dmitriev
+ *  10 November 2001
+ */
+public class BinaryFileReader {
+
+    protected byte[] buf;
+    protected int curBufPos;
+    protected String fileFullPath;  // Required only for nice error reports
+
+    protected void initBuf(byte[] buf, String fileFullPath) {
+        this.buf = buf;
+        curBufPos = 0;
+        this.fileFullPath = fileFullPath;
+    }
+
+    protected char nextChar() {
+        return (char) (((buf[curBufPos++] & 255) << 8) + (buf[curBufPos++] & 255));
+    }
+
+    protected char getChar(int bufPos) {
+        return (char) (((buf[bufPos] & 255) << 8) + (buf[bufPos+1] & 255));
+    }
+
+    protected int nextInt() {
+        return ((buf[curBufPos++] & 255) << 24) + ((buf[curBufPos++] & 255) << 16) +
+                ((buf[curBufPos++] & 255) << 8) + (buf[curBufPos++] & 255);
+    }
+
+    protected int getInt(int bufPos) {
+        return ((buf[bufPos] & 255) << 24) + ((buf[bufPos+1] & 255) << 16) +
+                ((buf[bufPos+2] & 255) << 8) + (buf[bufPos+3] & 255);
+    }
+
+    protected long nextLong() {
+        long res = getLong(curBufPos);
+        curBufPos += 8;
+        return res;
+    }
+
+    protected long getLong(int bufPos) {
+        DataInputStream bufin =
+                new DataInputStream(new ByteArrayInputStream(buf, bufPos, 8));
+        try {
+            return bufin.readLong();
+        } catch (IOException e) {
+            throw new PrivateException(e);
+        }
+    }
+
+    protected float nextFloat() {
+        float res = getFloat(curBufPos);
+        curBufPos += 4;
+        return res;
+    }
+
+    protected float getFloat(int bufPos) {
+        DataInputStream bufin =
+                new DataInputStream(new ByteArrayInputStream(buf, bufPos, 4));
+        try {
+            return bufin.readFloat();
+        } catch (IOException e) {
+            throw new PrivateException(e);
+        }
+    }
+
+    protected double nextDouble() {
+        double res = getDouble(curBufPos);
+        curBufPos += 8;
+        return res;
+    }
+
+    protected double getDouble(int bufPos) {
+        DataInputStream bufin =
+                new DataInputStream(new ByteArrayInputStream(buf, bufPos, 8));
+        try {
+            return bufin.readDouble();
+        } catch (IOException e) {
+            throw new PrivateException(e);
+        }
+    }
+}