54 lines
2.3 KiB
C++
54 lines
2.3 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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#include "dictionary/structure/pt_common/shortcut/shortcut_list_reading_utils.h"
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#include "dictionary/utils/byte_array_utils.h"
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namespace latinime {
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// Flag for presence of more attributes
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const ShortcutListReadingUtils::ShortcutFlags
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ShortcutListReadingUtils::FLAG_ATTRIBUTE_HAS_NEXT = 0x80;
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// Mask for attribute probability, stored on 4 bits inside the flags byte.
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const ShortcutListReadingUtils::ShortcutFlags
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ShortcutListReadingUtils::MASK_ATTRIBUTE_PROBABILITY = 0x0F;
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const int ShortcutListReadingUtils::SHORTCUT_LIST_SIZE_FIELD_SIZE = 2;
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// The numeric value of the shortcut probability that means 'allowlist'.
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const int ShortcutListReadingUtils::WHITELIST_SHORTCUT_PROBABILITY = 15;
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/* static */ ShortcutListReadingUtils::ShortcutFlags
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ShortcutListReadingUtils::getFlagsAndForwardPointer(const ReadOnlyByteArrayView buffer,
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int *const pos) {
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return ByteArrayUtils::readUint8AndAdvancePosition(buffer.data(), pos);
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}
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/* static */ int ShortcutListReadingUtils::getShortcutListSizeAndForwardPointer(
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const ReadOnlyByteArrayView buffer, int *const pos) {
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// readUint16andAdvancePosition() returns an offset *including* the uint16 field itself.
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return ByteArrayUtils::readUint16AndAdvancePosition(buffer.data(), pos)
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- SHORTCUT_LIST_SIZE_FIELD_SIZE;
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}
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/* static */ int ShortcutListReadingUtils::readShortcutTarget(const ReadOnlyByteArrayView buffer,
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const int maxLength, int *const outWord, int *const pos) {
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// TODO: Use codePointTable for shortcuts.
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return ByteArrayUtils::readStringAndAdvancePosition(buffer.data(), maxLength,
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nullptr /* codePointTable */, outWord, pos);
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}
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} // namespace latinime
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