Merge "Implement SparseTable in native code."

1 files changed, 42 insertions, 0 deletions

diff --git a/native/jni/src/suggest/policyimpl/dictionary/utils/sparse_table.cpp b/native/jni/src/suggest/policyimpl/dictionary/utils/sparse_table.cpp
new file mode 100644
index 000000000..93ec70c1e
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/utils/sparse_table.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2013, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "suggest/policyimpl/dictionary/utils/sparse_table.h"
+
+namespace latinime {
+
+const int SparseTable::NOT_EXIST = -1;
+
+bool SparseTable::contains(const int id) const {
+    if (id < 0 || mIndexTableBuffer->getTailPosition() <= id * mDataSize) {
+        return false;
+    }
+    const int indexTableIndex = id / mBlockSize;
+    const int readingPos = indexTableIndex * mDataSize;
+    const int index = mIndexTableBuffer->readUint(mDataSize, readingPos);
+    return index != NOT_EXIST;
+}
+
+uint32_t SparseTable::get(const int id) const {
+    const int indexTableIndex = id / mBlockSize;
+    int readingPos = indexTableIndex * mDataSize;
+    const int index = mIndexTableBuffer->readUint(mDataSize, readingPos);
+    const int offset = id % mBlockSize;
+    readingPos = (index * mDataSize + offset) * mBlockSize;
+    return mContentTableBuffer->readUint(mDataSize, readingPos);
+}
+
+} // namespace latinime