1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "dictionary/structure/pt_common/shortcut/shortcut_list_reading_utils.h" 18 19 #include "dictionary/utils/byte_array_utils.h" 20 21 namespace latinime { 22 23 // Flag for presence of more attributes 24 const ShortcutListReadingUtils::ShortcutFlags 25 ShortcutListReadingUtils::FLAG_ATTRIBUTE_HAS_NEXT = 0x80; 26 // Mask for attribute probability, stored on 4 bits inside the flags byte. 27 const ShortcutListReadingUtils::ShortcutFlags 28 ShortcutListReadingUtils::MASK_ATTRIBUTE_PROBABILITY = 0x0F; 29 const int ShortcutListReadingUtils::SHORTCUT_LIST_SIZE_FIELD_SIZE = 2; 30 // The numeric value of the shortcut probability that means 'whitelist'. 31 const int ShortcutListReadingUtils::WHITELIST_SHORTCUT_PROBABILITY = 15; 32 33 /* static */ ShortcutListReadingUtils::ShortcutFlags 34 ShortcutListReadingUtils::getFlagsAndForwardPointer(const ReadOnlyByteArrayView buffer, 35 int *const pos) { 36 return ByteArrayUtils::readUint8AndAdvancePosition(buffer.data(), pos); 37 } 38 39 /* static */ int ShortcutListReadingUtils::getShortcutListSizeAndForwardPointer( 40 const ReadOnlyByteArrayView buffer, int *const pos) { 41 // readUint16andAdvancePosition() returns an offset *including* the uint16 field itself. 42 return ByteArrayUtils::readUint16AndAdvancePosition(buffer.data(), pos) 43 - SHORTCUT_LIST_SIZE_FIELD_SIZE; 44 } 45 46 /* static */ int ShortcutListReadingUtils::readShortcutTarget(const ReadOnlyByteArrayView buffer, 47 const int maxLength, int *const outWord, int *const pos) { 48 // TODO: Use codePointTable for shortcuts. 49 return ByteArrayUtils::readStringAndAdvancePosition(buffer.data(), maxLength, 50 nullptr /* codePointTable */, outWord, pos); 51 } 52 53 } // namespace latinime 54
