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 'allowlist'.
31 const int ShortcutListReadingUtils::WHITELIST_SHORTCUT_PROBABILITY = 15;
32
33 /* static */ ShortcutListReadingUtils::ShortcutFlags
getFlagsAndForwardPointer(const ReadOnlyByteArrayView buffer,int * const pos)34 ShortcutListReadingUtils::getFlagsAndForwardPointer(const ReadOnlyByteArrayView buffer,
35 int *const pos) {
36 return ByteArrayUtils::readUint8AndAdvancePosition(buffer.data(), pos);
37 }
38
getShortcutListSizeAndForwardPointer(const ReadOnlyByteArrayView buffer,int * const pos)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
readShortcutTarget(const ReadOnlyByteArrayView buffer,const int maxLength,int * const outWord,int * const pos)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