194 lines
8.1 KiB
C++
194 lines
8.1 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/v4/ver4_dict_buffers.h"
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#include <cerrno>
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#include <cstring>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <vector>
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#include "dictionary/utils/byte_array_utils.h"
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#include "dictionary/utils/dict_file_writing_utils.h"
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#include "dictionary/utils/file_utils.h"
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#include "utils/byte_array_view.h"
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namespace latinime {
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/* static */ Ver4DictBuffers::Ver4DictBuffersPtr Ver4DictBuffers::openVer4DictBuffers(
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const char *const dictPath, MmappedBuffer::MmappedBufferPtr &&headerBuffer,
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const FormatUtils::FORMAT_VERSION formatVersion) {
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if (!headerBuffer) {
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ASSERT(false);
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AKLOGE("The header buffer must be valid to open ver4 dict buffers.");
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return Ver4DictBuffersPtr(nullptr);
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}
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// TODO: take only dictDirPath, and open both header and trie files in the constructor below
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const bool isUpdatable = headerBuffer->isUpdatable();
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MmappedBuffer::MmappedBufferPtr bodyBuffer = MmappedBuffer::openBuffer(dictPath,
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Ver4DictConstants::BODY_FILE_EXTENSION, isUpdatable);
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if (!bodyBuffer) {
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return Ver4DictBuffersPtr(nullptr);
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}
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std::vector<ReadWriteByteArrayView> buffers;
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const ReadWriteByteArrayView buffer = bodyBuffer->getReadWriteByteArrayView();
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int position = 0;
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while (position < static_cast<int>(buffer.size())) {
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const int bufferSize = ByteArrayUtils::readUint32AndAdvancePosition(
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buffer.data(), &position);
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buffers.push_back(buffer.subView(position, bufferSize));
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position += bufferSize;
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if (bufferSize < 0 || position < 0 || position > static_cast<int>(buffer.size())) {
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AKLOGE("The dict body file is corrupted.");
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return Ver4DictBuffersPtr(nullptr);
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}
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}
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if (buffers.size() != Ver4DictConstants::NUM_OF_CONTENT_BUFFERS_IN_BODY_FILE) {
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AKLOGE("The dict body file is corrupted.");
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return Ver4DictBuffersPtr(nullptr);
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}
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return Ver4DictBuffersPtr(new Ver4DictBuffers(std::move(headerBuffer), std::move(bodyBuffer),
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formatVersion, buffers));
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}
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bool Ver4DictBuffers::flushHeaderAndDictBuffers(const char *const dictDirPath,
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const BufferWithExtendableBuffer *const headerBuffer) const {
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// Create temporary directory.
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const int tmpDirPathBufSize = FileUtils::getFilePathWithSuffixBufSize(dictDirPath,
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DictFileWritingUtils::TEMP_FILE_SUFFIX_FOR_WRITING_DICT_FILE);
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char tmpDirPath[tmpDirPathBufSize];
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FileUtils::getFilePathWithSuffix(dictDirPath,
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DictFileWritingUtils::TEMP_FILE_SUFFIX_FOR_WRITING_DICT_FILE, tmpDirPathBufSize,
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tmpDirPath);
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if (FileUtils::existsDir(tmpDirPath)) {
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if (!FileUtils::removeDirAndFiles(tmpDirPath)) {
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AKLOGE("Existing directory %s cannot be removed.", tmpDirPath);
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ASSERT(false);
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return false;
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}
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}
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umask(S_IWGRP | S_IWOTH);
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if (mkdir(tmpDirPath, S_IRWXU) == -1) {
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AKLOGE("Cannot create directory: %s. errno: %d.", tmpDirPath, errno);
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return false;
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}
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// Get dictionary base path.
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const int dictNameBufSize = strlen(dictDirPath) + 1 /* terminator */;
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char dictName[dictNameBufSize];
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FileUtils::getBasename(dictDirPath, dictNameBufSize, dictName);
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const int dictPathBufSize = FileUtils::getFilePathBufSize(tmpDirPath, dictName);
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char dictPath[dictPathBufSize];
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FileUtils::getFilePath(tmpDirPath, dictName, dictPathBufSize, dictPath);
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// Write header file.
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if (!DictFileWritingUtils::flushBufferToFileWithSuffix(dictPath,
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Ver4DictConstants::HEADER_FILE_EXTENSION, headerBuffer)) {
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AKLOGE("Dictionary header file %s%s cannot be written.", tmpDirPath,
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Ver4DictConstants::HEADER_FILE_EXTENSION);
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return false;
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}
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// Write body file.
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const int bodyFilePathBufSize = FileUtils::getFilePathWithSuffixBufSize(dictPath,
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Ver4DictConstants::BODY_FILE_EXTENSION);
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char bodyFilePath[bodyFilePathBufSize];
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FileUtils::getFilePathWithSuffix(dictPath, Ver4DictConstants::BODY_FILE_EXTENSION,
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bodyFilePathBufSize, bodyFilePath);
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const int fd = open(bodyFilePath, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
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if (fd == -1) {
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AKLOGE("File %s cannot be opened. errno: %d", bodyFilePath, errno);
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ASSERT(false);
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return false;
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}
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FILE *const file = fdopen(fd, "wb");
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if (!file) {
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AKLOGE("fdopen failed for the file %s. errno: %d", bodyFilePath, errno);
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ASSERT(false);
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return false;
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}
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if (!flushDictBuffers(file)) {
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fclose(file);
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return false;
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}
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fclose(file);
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// Remove existing dictionary.
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if (!FileUtils::removeDirAndFiles(dictDirPath)) {
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AKLOGE("Existing directory %s cannot be removed.", dictDirPath);
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ASSERT(false);
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return false;
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}
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// Rename temporary directory.
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if (rename(tmpDirPath, dictDirPath) != 0) {
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AKLOGE("%s cannot be renamed to %s", tmpDirPath, dictDirPath);
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ASSERT(false);
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return false;
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}
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return true;
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}
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bool Ver4DictBuffers::flushDictBuffers(FILE *const file) const {
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// Write trie.
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if (!DictFileWritingUtils::writeBufferToFileTail(file, &mExpandableTrieBuffer)) {
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AKLOGE("Trie cannot be written.");
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return false;
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}
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// Write terminal position lookup table.
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if (!mTerminalPositionLookupTable.flushToFile(file)) {
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AKLOGE("Terminal position lookup table cannot be written.");
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return false;
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}
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// Write language model content.
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if (!mLanguageModelDictContent.save(file)) {
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AKLOGE("Language model dict content cannot be written.");
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return false;
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}
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// Write shortcut dict content.
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if (!mShortcutDictContent.flushToFile(file)) {
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AKLOGE("Shortcut dict content cannot be written.");
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return false;
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}
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return true;
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}
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Ver4DictBuffers::Ver4DictBuffers(MmappedBuffer::MmappedBufferPtr &&headerBuffer,
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MmappedBuffer::MmappedBufferPtr &&bodyBuffer,
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const FormatUtils::FORMAT_VERSION formatVersion,
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const std::vector<ReadWriteByteArrayView> &contentBuffers)
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: mHeaderBuffer(std::move(headerBuffer)), mDictBuffer(std::move(bodyBuffer)),
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mHeaderPolicy(mHeaderBuffer->getReadOnlyByteArrayView().data(), formatVersion),
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mExpandableHeaderBuffer(mHeaderBuffer->getReadWriteByteArrayView(),
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BufferWithExtendableBuffer::DEFAULT_MAX_ADDITIONAL_BUFFER_SIZE),
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mExpandableTrieBuffer(contentBuffers[Ver4DictConstants::TRIE_BUFFER_INDEX],
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BufferWithExtendableBuffer::DEFAULT_MAX_ADDITIONAL_BUFFER_SIZE),
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mTerminalPositionLookupTable(
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contentBuffers[Ver4DictConstants::TERMINAL_ADDRESS_LOOKUP_TABLE_BUFFER_INDEX]),
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mLanguageModelDictContent(&contentBuffers[Ver4DictConstants::LANGUAGE_MODEL_BUFFER_INDEX],
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mHeaderPolicy.hasHistoricalInfoOfWords()),
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mShortcutDictContent(&contentBuffers[Ver4DictConstants::SHORTCUT_BUFFERS_INDEX]),
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mIsUpdatable(mDictBuffer->isUpdatable()) {}
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Ver4DictBuffers::Ver4DictBuffers(const HeaderPolicy *const headerPolicy, const int maxTrieSize)
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: mHeaderBuffer(nullptr), mDictBuffer(nullptr), mHeaderPolicy(headerPolicy),
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mExpandableHeaderBuffer(Ver4DictConstants::MAX_DICTIONARY_SIZE),
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mExpandableTrieBuffer(maxTrieSize), mTerminalPositionLookupTable(),
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mLanguageModelDictContent(headerPolicy->hasHistoricalInfoOfWords()),
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mShortcutDictContent(), mIsUpdatable(true) {}
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} // namespace latinime
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