124 lines
4.3 KiB
Java
Executable File
124 lines
4.3 KiB
Java
Executable File
/******************************************************************************
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* Benix 0.8 *
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* Copyright © 2015 Ben Goldsworthy (rumps) *
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* *
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* A program to simulate an OS and read a file store. *
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* *
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* This file is part of Benix. *
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* *
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* Benix is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* Benix is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with Benix. If not, see <http://www.gnu.org/licenses/>. *
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******************************************************************************/
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/**
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** This class represents a superblock.
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**/
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import java.nio.ByteBuffer;
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import java.lang.StringBuffer;
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/**
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** @author Ben Goldsworthy (rumps) <me+benix@bengoldsworthy.net>
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** @version 0.8
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**/
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final public class SuperBlock extends Block {
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/**
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** Constructor method.
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**
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** @param superBlock The block byte dump.
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** @param debug Whether debug mode is active or not.
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**/
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public SuperBlock(ByteBuffer superBlock, boolean debug) {
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super(superBlock, false);
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if (debug) {
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System.out.println("-----Values read from superblock-----");
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System.out.println("Number of inodes: " + this.getNumofInodes());
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System.out.println("Number of blocks: " + this.getNumofBlocks());
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System.out.println("Number of blocks per group: " + this.getBlocksPerGroup());
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System.out.println("Number of inodes per group: " + this.getInodesPerGroup());
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System.out.println("Inode size: " + this.getInodeSize() + " bytes");
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System.out.println("Volume label: " + this.getVolumeLabel());
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System.out.println("Size: " + this.getNumofBlocks() * BLOCK_SIZE + " bytes");
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System.out.println("Number of block groups: " + this.getNumofBlockGroups());
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System.out.println("-------------------------------------");
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}
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}
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/**
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* Accessor function.
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*
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* @return The number of inodes.
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*/
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public int getNumofInodes() {
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return block.getInt(0);
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}
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/**
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* Accessor function.
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*
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* @return The number of blocks.
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*/
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public int getNumofBlocks() {
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return block.getInt(4);
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}
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/**
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* Accessor function.
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*
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* @return The number of blocks per block group.
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*/
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public int getBlocksPerGroup() {
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return block.getInt(32);
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}
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/**
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* Accessor function.
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*
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* @return The number of inodes per block group.
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*/
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public int getInodesPerGroup() {
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return block.getInt(40);
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}
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/**
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* Accessor function.
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*
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* @return The size of inodes in bytes.
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*/
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public int getInodeSize() {
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return block.getInt(88);
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}
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/**
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* Accessor function.
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*
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* @return The label of the volume.
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*/
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public String getVolumeLabel() {
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StringBuffer volumeLabel = new StringBuffer();
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for (int i = 120; i < (120 + 16); i++)
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volumeLabel.append((char)block.get(i));
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return volumeLabel.toString();
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}
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/**
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* Accessor function.
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*
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* @return The number of of block groups.
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*/
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public int getNumofBlockGroups() {
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return (int)Math.ceil(getNumofBlocks()/getBlocksPerGroup());
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}
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}
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