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 "shill/file_reader.h" 18 19 #include <base/files/file_util.h> 20 21 using base::FilePath; 22 using std::string; 23 24 namespace shill { 25 26 FileReader::FileReader() { 27 } 28 29 FileReader::~FileReader() { 30 } 31 32 void FileReader::Close() { 33 file_.reset(); 34 } 35 36 bool FileReader::Open(const FilePath& file_path) { 37 file_.reset(base::OpenFile(file_path, "rb")); 38 return file_.get() != nullptr; 39 } 40 41 bool FileReader::ReadLine(string* line) { 42 CHECK(line) << "Invalid argument"; 43 44 FILE* fp = file_.get(); 45 if (!fp) 46 return false; 47 48 line->clear(); 49 bool line_valid = false; 50 int ch; 51 while ((ch = fgetc(fp)) != EOF) { 52 if (ch == '\n') 53 return true; 54 line->push_back(static_cast<char>(ch)); 55 line_valid = true; 56 } 57 return line_valid; 58 } 59 60 } // namespace shill 61
