/* * Copyright (C) 2012, 2016 higherfrequencytrading.com * Copyright (C) 2016 Roman Leventov * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package net.openhft.chronicle.hash.impl.util; import java.io.IOException; import java.nio.ByteBuffer; import java.nio.channels.FileChannel; public final class FileIOUtils { private FileIOUtils() {} public static void readFully(FileChannel fileChannel, long filePosition, ByteBuffer buffer) throws IOException { int startBufferPosition = buffer.position(); while (buffer.remaining() > 0 && buffer.position() < fileChannel.size()) { int bytesRead = fileChannel.read(buffer, filePosition + buffer.position() - startBufferPosition); if (bytesRead == -1) break; } } public static void writeFully(FileChannel fileChannel, long filePosition, ByteBuffer buffer) throws IOException { int startBufferPosition = buffer.position(); while (buffer.remaining() > 0) { fileChannel.write(buffer, filePosition + buffer.position() - startBufferPosition); } } }