73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LATINIME_SHORTCUT_LIST_READING_UTILS_H
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#define LATINIME_SHORTCUT_LIST_READING_UTILS_H
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#include <cstdint>
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#include "defines.h"
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#include "utils/byte_array_view.h"
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namespace latinime {
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class ShortcutListReadingUtils {
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public:
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typedef uint8_t ShortcutFlags;
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static ShortcutFlags getFlagsAndForwardPointer(const ReadOnlyByteArrayView buffer,
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int *const pos);
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static AK_FORCE_INLINE int getProbabilityFromFlags(const ShortcutFlags flags) {
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return flags & MASK_ATTRIBUTE_PROBABILITY;
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}
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static AK_FORCE_INLINE bool hasNext(const ShortcutFlags flags) {
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return (flags & FLAG_ATTRIBUTE_HAS_NEXT) != 0;
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}
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// This method returns the size of the shortcut list region excluding the shortcut list size
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// field at the beginning.
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static int getShortcutListSizeAndForwardPointer(const ReadOnlyByteArrayView buffer,
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int *const pos);
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static AK_FORCE_INLINE int getShortcutListSizeFieldSize() {
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return SHORTCUT_LIST_SIZE_FIELD_SIZE;
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}
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static AK_FORCE_INLINE void skipShortcuts(const ReadOnlyByteArrayView buffer, int *const pos) {
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const int shortcutListSize = getShortcutListSizeAndForwardPointer(buffer, pos);
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*pos += shortcutListSize;
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}
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static AK_FORCE_INLINE bool isWhitelist(const ShortcutFlags flags) {
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return getProbabilityFromFlags(flags) == WHITELIST_SHORTCUT_PROBABILITY;
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}
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static int readShortcutTarget(const ReadOnlyByteArrayView buffer, const int maxLength,
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int *const outWord, int *const pos);
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(ShortcutListReadingUtils);
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static const ShortcutFlags FLAG_ATTRIBUTE_HAS_NEXT;
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static const ShortcutFlags MASK_ATTRIBUTE_PROBABILITY;
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static const int SHORTCUT_LIST_SIZE_FIELD_SIZE;
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static const int WHITELIST_SHORTCUT_PROBABILITY;
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};
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} // namespace latinime
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#endif // LATINIME_SHORTCUT_LIST_READING_UTILS_H
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