1 files changed, 85 insertions, 0 deletions
diff --git a/org.fox.ttcomics/src/main/java/org/fox/ttcomics2/junrar/unpack/ppm/AnalyzeHeapDump.java b/org.fox.ttcomics/src/main/java/org/fox/ttcomics2/junrar/unpack/ppm/AnalyzeHeapDump.java
new file mode 100644
index 0000000..9ba997d
--- /dev/null
+++ b/org.fox.ttcomics/src/main/java/org/fox/ttcomics2/junrar/unpack/ppm/AnalyzeHeapDump.java
@@ -0,0 +1,85 @@
+package org.fox.ttcomics2.junrar.unpack.ppm;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class AnalyzeHeapDump {
+
+    public AnalyzeHeapDump() {
+    }
+
+    public static void main(String[] argv) {
+        File cfile = new File("P:\\test\\heapdumpc");
+        File jfile = new File("P:\\test\\heapdumpj");
+        if (!cfile.exists()) {
+            System.err.println("File not found: " + cfile.getAbsolutePath());
+            return;
+        }
+        if (!jfile.exists()) {
+            System.err.println("File not found: " + jfile.getAbsolutePath());
+            return;
+        }
+        long clen = cfile.length();
+        long jlen = jfile.length();
+        if (clen != jlen) {
+            System.out.println("File size mismatch");
+            System.out.println("clen = " + clen);
+            System.out.println("jlen = " + jlen);
+        }
+        // Do byte comparison
+        long len = Math.min(clen, jlen);
+        InputStream cin = null;
+        InputStream jin = null;
+        int bufferLen = 256 * 1024;
+        try {
+            cin = new BufferedInputStream(
+                    new FileInputStream(cfile), bufferLen);
+            jin = new BufferedInputStream(
+                    new FileInputStream(jfile), bufferLen);
+            boolean matching = true;
+            boolean mismatchFound = false;
+            long startOff = 0L;
+            long off = 0L;
+            while (off < len) {
+                if (cin.read() != jin.read()) {
+                    if (matching) {
+                        startOff = off;
+                        matching = false;
+                        mismatchFound = true;
+                    }
+                } else { // match
+                    if (!matching) {
+                        printMismatch(startOff, off);
+                        matching = true;
+                    }
+                }
+                off++;
+            }
+            if (!matching) {
+                printMismatch(startOff, off);
+            }
+            if (!mismatchFound) {
+                System.out.println("Files are identical");
+            }
+            System.out.println("Done");
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                cin.close();
+                jin.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private static void printMismatch(long startOff, long bytesRead) {
+        System.out.println("Mismatch: off=" + startOff +
+                "(0x" + Long.toHexString(startOff) +
+                "), len=" + (bytesRead - startOff));
+    }
+}