Add spellcheck and word suggestion to the prediction service

third_party/android_prediction/suggest/policyimpl/dictionary/header/header_read_write_utils.h

Index: third_party/android_prediction/suggest/policyimpl/dictionary/header/header_read_write_utils.h
diff --git a/third_party/android_prediction/suggest/policyimpl/dictionary/header/header_read_write_utils.h b/third_party/android_prediction/suggest/policyimpl/dictionary/header/header_read_write_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..03cfc544445fd25ab4eafceacf20bf98946656d5
--- /dev/null
+++ b/third_party/android_prediction/suggest/policyimpl/dictionary/header/header_read_write_utils.h
@@ -0,0 +1,118 @@
+/*
+ * 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_HEADER_READ_WRITE_UTILS_H
+#define LATINIME_HEADER_READ_WRITE_UTILS_H
+
+#include <cstdint>
+
+#include "third_party/android_prediction/defines.h"
+#include "third_party/android_prediction/suggest/core/policy/dictionary_header_structure_policy.h"
+#include "third_party/android_prediction/suggest/policyimpl/dictionary/utils/format_utils.h"
+
+namespace latinime {
+
+class BufferWithExtendableBuffer;
+
+class HeaderReadWriteUtils {
+ public:
+    typedef uint16_t DictionaryFlags;
+
+    static int getHeaderSize(const uint8_t *const dictBuf);
+
+    static DictionaryFlags getFlags(const uint8_t *const dictBuf);
+
+    static AK_FORCE_INLINE int getHeaderOptionsPosition() {
+        return HEADER_MAGIC_NUMBER_SIZE + HEADER_DICTIONARY_VERSION_SIZE + HEADER_FLAG_SIZE
+                + HEADER_SIZE_FIELD_SIZE;
+    }
+
+    static DictionaryFlags createAndGetDictionaryFlagsUsingAttributeMap(
+            const DictionaryHeaderStructurePolicy::AttributeMap *const attributeMap);
+
+    static void fetchAllHeaderAttributes(const uint8_t *const dictBuf,
+            DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes);
+
+    static bool writeDictionaryVersion(BufferWithExtendableBuffer *const buffer,
+            const FormatUtils::FORMAT_VERSION version, int *const writingPos);
+
+    static bool writeDictionaryFlags(BufferWithExtendableBuffer *const buffer,
+            const DictionaryFlags flags, int *const writingPos);
+
+    static bool writeDictionaryHeaderSize(BufferWithExtendableBuffer *const buffer,
+            const int size, int *const writingPos);
+
+    static bool writeHeaderAttributes(BufferWithExtendableBuffer *const buffer,
+            const DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes,
+            int *const writingPos);
+
+    /**
+     * Methods for header attributes.
+     */
+    static void setCodePointVectorAttribute(
+            DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes,
+            const char *const key, const std::vector<int> value);
+
+    static void setBoolAttribute(
+            DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes,
+            const char *const key, const bool value);
+
+    static void setIntAttribute(
+            DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes,
+            const char *const key, const int value);
+
+    static const std::vector<int> readCodePointVectorAttributeValue(
+            const DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes,
+            const char *const key);
+
+    static bool readBoolAttributeValue(
+            const DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes,
+            const char *const key, const bool defaultValue);
+
+    static int readIntAttributeValue(
+            const DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes,
+            const char *const key, const int defaultValue);
+
+    static void insertCharactersIntoVector(const char *const characters,
+            DictionaryHeaderStructurePolicy::AttributeMap::key_type *const key);
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(HeaderReadWriteUtils);
+
+    static const int LARGEST_INT_DIGIT_COUNT;
+    static const int MAX_ATTRIBUTE_KEY_LENGTH;
+    static const int MAX_ATTRIBUTE_VALUE_LENGTH;
+
+    static const int HEADER_MAGIC_NUMBER_SIZE;
+    static const int HEADER_DICTIONARY_VERSION_SIZE;
+    static const int HEADER_FLAG_SIZE;
+    static const int HEADER_SIZE_FIELD_SIZE;
+
+    // Value for the "flags" field. It's unused at the moment.
+    static const DictionaryFlags NO_FLAGS;
+
+    static void setIntAttributeInner(
+            DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes,
+            const DictionaryHeaderStructurePolicy::AttributeMap::key_type *const key,
+            const int value);
+
+    static int readIntAttributeValueInner(
+            const DictionaryHeaderStructurePolicy::AttributeMap *const headerAttributes,
+            const DictionaryHeaderStructurePolicy::AttributeMap::key_type *const key,
+            const int defaultValue);
+};
+}
+#endif /* LATINIME_HEADER_READ_WRITE_UTILS_H */