am f0bead28: Merge "DO NOT MERGE Enhance local log." into mnc-dev

* commit 'f0bead280154fd9a5d2c07b1186e10fcfeed55fc':
  DO NOT MERGE Enhance local log.

core/java/android/util/LocalLog.java

@@ -30,20 +30,32 @@ public final class LocalLog {
     private LinkedList<String> mLog;
     private int mMaxLines;
     private long mNow;
+    private final boolean mKeepFirst;
 
     public LocalLog(int maxLines) {
         mLog = new LinkedList<String>();
         mMaxLines = maxLines;
+        mKeepFirst = false;
+    }
+
+    public LocalLog(int maxLines, boolean keepFirst) {
+        mLog = new LinkedList<String>();
+        mMaxLines = maxLines;
+        mKeepFirst = keepFirst;
     }
 
     public synchronized void log(String msg) {
+        mNow = System.currentTimeMillis();
+        StringBuilder sb = new StringBuilder();
+        Calendar c = Calendar.getInstance();
+        c.setTimeInMillis(mNow);
+        sb.append(String.format("%tm-%td %tH:%tM:%tS.%tL", c, c, c, c, c, c));
+        logStraight(sb.toString() + " - " + msg);
+    }
+
+    private synchronized void logStraight(String msg) {
+        if (mKeepFirst == false || mLog.size() < mMaxLines) mLog.add(msg);
         if (mMaxLines > 0) {
-            mNow = System.currentTimeMillis();
-            StringBuilder sb = new StringBuilder();
-            Calendar c = Calendar.getInstance();
-            c.setTimeInMillis(mNow);
-            sb.append(String.format("%tm-%td %tH:%tM:%tS.%tL", c, c, c, c, c, c));
-            mLog.add(sb.toString() + " - " + msg);
             while (mLog.size() > mMaxLines) mLog.remove();
         }
     }
@@ -74,4 +86,13 @@ public final class LocalLog {
     public ReadOnlyLocalLog readOnlyLocalLog() {
         return new ReadOnlyLocalLog(this);
     }
+
+    public synchronized void copyTo(LocalLog other, int lines) {
+        int end = mLog.size()-1;
+        int begin = end - lines;
+        if (begin < 0) begin = 0;
+        for (; begin < end; begin++) {
+            other.logStraight(mLog.get(begin));
+        }
+    }
 }