| /************************************************************ |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| #include "singa/io/textfile_store.h" |
| #include <glog/logging.h> |
| |
| namespace singa { |
| namespace io { |
| |
| bool TextFileStore::Open(const std::string& source, Mode mode) { |
| if (mode == kRead) |
| fs_ = new std::fstream(source, std::fstream::in); |
| else if (mode == kCreate) |
| fs_ = new std::fstream(source, std::fstream::out); |
| mode_ = mode; |
| return fs_->is_open(); |
| } |
| |
| void TextFileStore::Close() { |
| if (fs_ != nullptr) { |
| if (fs_->is_open()) { |
| if (mode_ != kRead) |
| fs_->flush(); |
| fs_->close(); |
| } |
| delete fs_; |
| fs_ = nullptr; |
| } |
| } |
| |
| bool TextFileStore::Read(std::string* key, std::string* value) { |
| CHECK_EQ(mode_, kRead); |
| CHECK(fs_ != nullptr); |
| CHECK(value != nullptr); |
| CHECK(key != nullptr); |
| if (!std::getline(*fs_, *value)) { |
| if (fs_->eof()) |
| return false; |
| else |
| LOG(FATAL) << "error in reading csv file"; |
| } |
| *key = std::to_string(lineNo_++); |
| return true; |
| } |
| |
| void TextFileStore::SeekToFirst() { |
| CHECK_EQ(mode_, kRead); |
| CHECK(fs_ != nullptr); |
| lineNo_ = 0; |
| fs_->clear(); |
| fs_->seekg(0); |
| } |
| |
| void TextFileStore::Seek(int offset) { |
| } |
| |
| bool TextFileStore::Write(const std::string& key, const std::string& value) { |
| CHECK_NE(mode_, kRead); |
| CHECK(fs_ != nullptr); |
| // csv store does not write key |
| *fs_ << value << '\n'; |
| return true; |
| } |
| |
| void TextFileStore::Flush() { |
| fs_->flush(); |
| } |
| |
| } // namespace io |
| } // namespace singa |