1/*
2 * Copyright (C) 2014, 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/v2/ver2_pt_node_array_reader.h"
18
19#include "dictionary/structure/pt_common/patricia_trie_reading_utils.h"
20
21namespace latinime {
22
23bool Ver2PtNodeArrayReader::readPtNodeArrayInfoAndReturnIfValid(const int ptNodeArrayPos,
24        int *const outPtNodeCount, int *const outFirstPtNodePos) const {
25    if (ptNodeArrayPos < 0 || ptNodeArrayPos >= static_cast<int>(mBuffer.size())) {
26        // Reading invalid position because of a bug or a broken dictionary.
27        AKLOGE("Reading PtNode array info from invalid dictionary position: %d, dict size: %zd",
28                ptNodeArrayPos, mBuffer.size());
29        ASSERT(false);
30        return false;
31    }
32    int readingPos = ptNodeArrayPos;
33    const int ptNodeCountInArray = PatriciaTrieReadingUtils::getPtNodeArraySizeAndAdvancePosition(
34            mBuffer.data(), &readingPos);
35    *outPtNodeCount = ptNodeCountInArray;
36    *outFirstPtNodePos = readingPos;
37    return true;
38}
39
40bool Ver2PtNodeArrayReader::readForwardLinkAndReturnIfValid(const int forwordLinkPos,
41        int *const outNextPtNodeArrayPos) const {
42    if (forwordLinkPos < 0 || forwordLinkPos >=  static_cast<int>(mBuffer.size())) {
43        // Reading invalid position because of bug or broken dictionary.
44        AKLOGE("Reading forward link from invalid dictionary position: %d, dict size: %zd",
45                forwordLinkPos, mBuffer.size());
46        ASSERT(false);
47        return false;
48    }
49    // Ver2 dicts don't have forward links.
50    *outNextPtNodeArrayPos = NOT_A_DICT_POS;
51    return true;
52}
53
54} // namespace latinime
55