Add spellcheck and word suggestion to the prediction service

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

Index: third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_updating_helper.h
diff --git a/third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_updating_helper.h b/third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_updating_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..4be58282fd4c4a06b603151672613e1d410666f9
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+++ b/third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_updating_helper.h
@@ -0,0 +1,95 @@
+/*
+ * 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_UPDATING_HELPER_H
+#define LATINIME_DYNAMIC_PT_UPDATING_HELPER_H
+
+#include "third_party/android_prediction/defines.h"
+#include "third_party/android_prediction/suggest/policyimpl/dictionary/structure/pt_common/pt_node_params.h"
+#include "third_party/android_prediction/utils/int_array_view.h"
+
+namespace latinime {
+
+class BigramProperty;
+class BufferWithExtendableBuffer;
+class DynamicPtReadingHelper;
+class PtNodeReader;
+class PtNodeWriter;
+class UnigramProperty;
+
+class DynamicPtUpdatingHelper {
+ public:
+    DynamicPtUpdatingHelper(BufferWithExtendableBuffer *const buffer,
+            const PtNodeReader *const ptNodeReader, PtNodeWriter *const ptNodeWriter)
+            : mBuffer(buffer), mPtNodeReader(ptNodeReader), mPtNodeWriter(ptNodeWriter) {}
+
+    ~DynamicPtUpdatingHelper() {}
+
+    // Add a word to the dictionary. If the word already exists, update the probability.
+    bool addUnigramWord(DynamicPtReadingHelper *const readingHelper,
+            const int *const wordCodePoints, const int codePointCount,
+            const UnigramProperty *const unigramProperty, bool *const outAddedNewUnigram);
+
+    // Add an n-gram entry.
+    bool addNgramEntry(const PtNodePosArrayView prevWordsPtNodePos, const int wordPos,
+            const BigramProperty *const bigramProperty, bool *const outAddedNewEntry);
+
+    // Remove an n-gram entry.
+    bool removeNgramEntry(const PtNodePosArrayView prevWordsPtNodePos, const int wordPos);
+
+    // Add a shortcut target.
+    bool addShortcutTarget(const int wordPos, const int *const targetCodePoints,
+            const int targetCodePointCount, const int shortcutProbability);
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(DynamicPtUpdatingHelper);
+
+    static const int CHILDREN_POSITION_FIELD_SIZE;
+
+    BufferWithExtendableBuffer *const mBuffer;
+    const PtNodeReader *const mPtNodeReader;
+    PtNodeWriter *const mPtNodeWriter;
+
+    bool createAndInsertNodeIntoPtNodeArray(const int parentPos, const int *const nodeCodePoints,
+            const int nodeCodePointCount, const UnigramProperty *const unigramProperty,
+            int *const forwardLinkFieldPos);
+
+    bool setPtNodeProbability(const PtNodeParams *const originalPtNodeParams,
+            const UnigramProperty *const unigramProperty, bool *const outAddedNewUnigram);
+
+    bool createChildrenPtNodeArrayAndAChildPtNode(const PtNodeParams *const parentPtNodeParams,
+            const UnigramProperty *const unigramProperty, const int *const codePoints,
+            const int codePointCount);
+
+    bool createNewPtNodeArrayWithAChildPtNode(const int parentPos, const int *const nodeCodePoints,
+            const int nodeCodePointCount, const UnigramProperty *const unigramProperty);
+
+    bool reallocatePtNodeAndAddNewPtNodes(
+            const PtNodeParams *const reallocatingPtNodeParams, const int overlappingCodePointCount,
+            const UnigramProperty *const unigramProperty, const int *const newNodeCodePoints,
+            const int newNodeCodePointCount);
+
+    const PtNodeParams getUpdatedPtNodeParams(const PtNodeParams *const originalPtNodeParams,
+            const bool isNotAWord, const bool isBlacklisted, const bool isTerminal,
+            const int parentPos, const int codePointCount,
+            const int *const codePoints, const int probability) const;
+
+    const PtNodeParams getPtNodeParamsForNewPtNode(const bool isNotAWord, const bool isBlacklisted,
+            const bool isTerminal, const int parentPos,
+            const int codePointCount, const int *const codePoints, const int probability) const;
+};
+} // namespace latinime
+#endif /* LATINIME_DYNAMIC_PATRICIA_TRIE_UPDATING_HELPER_H */