Add spellcheck and word suggestion to the prediction service

third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_reading_utils.h

Index: third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_reading_utils.h
diff --git a/third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_reading_utils.h b/third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_reading_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..5912f658c35d59b092704b05d78adec7ca2b9003
--- /dev/null
+++ b/third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_reading_utils.h
@@ -0,0 +1,83 @@
+/*
+ * 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.
+ */
+
+#ifndef LATINIME_DYNAMIC_PT_READING_UTILS_H
+#define LATINIME_DYNAMIC_PT_READING_UTILS_H
+
+#include <cstdint>
+
+#include "third_party/android_prediction/defines.h"
+
+namespace latinime {
+
+class DynamicPtReadingUtils {
+ public:
+    typedef uint8_t NodeFlags;
+
+    static const int DICT_OFFSET_INVALID;
+    static const int DICT_OFFSET_ZERO_OFFSET;
+
+    static int getForwardLinkPosition(const uint8_t *const buffer, const int pos);
+
+    static AK_FORCE_INLINE bool isValidForwardLinkPosition(const int forwardLinkAddress) {
+        return forwardLinkAddress != 0;
+    }
+
+    static int getParentPtNodePosOffsetAndAdvancePosition(const uint8_t *const buffer,
+            int *const pos);
+
+    static int getParentPtNodePos(const int parentOffset, const int ptNodePos);
+
+    static int readChildrenPositionAndAdvancePosition(const uint8_t *const buffer, int *const pos);
+
+    /**
+     * Node Flags
+     */
+    static AK_FORCE_INLINE bool isMoved(const NodeFlags flags) {
+        return FLAG_IS_MOVED == (MASK_MOVED & flags);
+    }
+
+    static AK_FORCE_INLINE bool isDeleted(const NodeFlags flags) {
+        return FLAG_IS_DELETED == (MASK_MOVED & flags);
+    }
+
+    static AK_FORCE_INLINE bool willBecomeNonTerminal(const NodeFlags flags) {
+        return FLAG_WILL_BECOME_NON_TERMINAL == (MASK_MOVED & flags);
+    }
+
+    static AK_FORCE_INLINE NodeFlags updateAndGetFlags(const NodeFlags originalFlags,
+            const bool isMoved, const bool isDeleted, const bool willBecomeNonTerminal) {
+        NodeFlags flags = originalFlags;
+        flags = willBecomeNonTerminal ?
+                ((flags & (~MASK_MOVED)) | FLAG_WILL_BECOME_NON_TERMINAL) : flags;
+        flags = isMoved ? ((flags & (~MASK_MOVED)) | FLAG_IS_MOVED) : flags;
+        flags = isDeleted ? ((flags & (~MASK_MOVED)) | FLAG_IS_DELETED) : flags;
+        flags = (!isMoved && !isDeleted && !willBecomeNonTerminal) ?
+                ((flags & (~MASK_MOVED)) | FLAG_IS_NOT_MOVED) : flags;
+        return flags;
+    }
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(DynamicPtReadingUtils);
+
+    static const NodeFlags MASK_MOVED;
+    static const NodeFlags FLAG_IS_NOT_MOVED;
+    static const NodeFlags FLAG_IS_MOVED;
+    static const NodeFlags FLAG_IS_DELETED;
+    static const NodeFlags FLAG_WILL_BECOME_NON_TERMINAL;
+};
+} // namespace latinime
+#endif /* LATINIME_DYNAMIC_PT_READING_UTILS_H */