commit 776abc24cdd18610232a50b997cce3cffa74609b
author Adam Lesinski <adamlesinski@google.com> Fri Mar 07 11:30:59 2014 -0500
committer Adam Lesinski <adamlesinski@google.com> Thu Mar 27 11:42:10 2014 -0700
tree 9ec6c84c00b7e8e653b9bc1c91e612cdf2afb32d
parent 350159c65a52092db04f1b8efce6943f61e50e73

Uses VMRuntime.newUnpaddedArray for ideal array sizes

Bug:13028925

Change-Id: I0a9301248b10a339afbdc5e4ffe3310ac4fa1fb7

core/java/android/util/LongSparseLongArray.java

diff --git a/core/java/android/util/LongSparseLongArray.java b/core/java/android/util/LongSparseLongArray.java
index b8073dd..a361457 100644
--- a/core/java/android/util/LongSparseLongArray.java
+++ b/core/java/android/util/LongSparseLongArray.java
@@ -17,6 +17,9 @@
 package android.util;
 
 import com.android.internal.util.ArrayUtils;
+import com.android.internal.util.GrowingArrayUtils;
+
+import libcore.util.EmptyArray;
 
 /**
  * Map of {@code long} to {@code long}. Unlike a normal array of longs, there
@@ -62,12 +65,11 @@
      */
     public LongSparseLongArray(int initialCapacity) {
         if (initialCapacity == 0) {
-            mKeys = ContainerHelpers.EMPTY_LONGS;
-            mValues = ContainerHelpers.EMPTY_LONGS;
+            mKeys = EmptyArray.LONG;
+            mValues = EmptyArray.LONG;
         } else {
-            initialCapacity = ArrayUtils.idealLongArraySize(initialCapacity);
-            mKeys = new long[initialCapacity];
-            mValues = new long[initialCapacity];
+            mKeys = ArrayUtils.newUnpaddedLongArray(initialCapacity);
+            mValues = new long[mKeys.length];
         }
         mSize = 0;
     }
@@ -140,17 +142,8 @@
         } else {
             i = ~i;
 
-            if (mSize >= mKeys.length) {
-                growKeyAndValueArrays(mSize + 1);
-            }
-
-            if (mSize - i != 0) {
-                System.arraycopy(mKeys, i, mKeys, i + 1, mSize - i);
-                System.arraycopy(mValues, i, mValues, i + 1, mSize - i);
-            }
-
-            mKeys[i] = key;
-            mValues[i] = value;
+            mKeys = GrowingArrayUtils.insert(mKeys, mSize, i, key);
+            mValues = GrowingArrayUtils.insert(mValues, mSize, i, value);
             mSize++;
         }
     }
@@ -234,27 +227,9 @@
             return;
         }
 
-        int pos = mSize;
-        if (pos >= mKeys.length) {
-            growKeyAndValueArrays(pos + 1);
-        }
-
-        mKeys[pos] = key;
-        mValues[pos] = value;
-        mSize = pos + 1;
-    }
-
-    private void growKeyAndValueArrays(int minNeededSize) {
-        int n = ArrayUtils.idealLongArraySize(minNeededSize);
-
-        long[] nkeys = new long[n];
-        long[] nvalues = new long[n];
-
-        System.arraycopy(mKeys, 0, nkeys, 0, mKeys.length);
-        System.arraycopy(mValues, 0, nvalues, 0, mValues.length);
-
-        mKeys = nkeys;
-        mValues = nvalues;
+        mKeys = GrowingArrayUtils.append(mKeys, mSize, key);
+        mValues = GrowingArrayUtils.append(mValues, mSize, value);
+        mSize++;
     }
 
     /**