/*
* 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);
}
}
}