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like /tools/mspsim. This is a very simple modification that affects a very large number of files in Contiki: Cooja, /platform/cooja, Collect-view, Coffe-manager, and Cooja simulation files (.csc). I've gone through Contiki to update all references I could find. Nevertheless, this commit will likely break external dependencies, like saved Cooja simulation files.
198 lines
5.8 KiB
Java
198 lines
5.8 KiB
Java
/*
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* Copyright (c) 2009, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @author Nicolas Tsiftes
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*
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*/
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package org.contikios.coffee;
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import java.io.*;
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import java.util.Map;
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import java.util.TreeMap;
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public class CoffeeFS {
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private final CoffeeImage image;
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private final CoffeeConfiguration conf;
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private int currentPage;
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private Map<String, CoffeeFile> files;
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private static final int INVALID_PAGE = -1;
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public CoffeeFS(CoffeeImage image) throws IOException {
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this.image = image;
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conf = image.getConfiguration();
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currentPage = 0;
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files = new TreeMap<String, CoffeeFile>();
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while(currentPage < (conf.fsSize / conf.pageSize)) {
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CoffeeHeader header = readHeader(currentPage);
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if (header.isActive() && !header.isLog()) {
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CoffeeFile file = new CoffeeFile(this, header);
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files.put(file.getName(), file);
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}
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currentPage = nextFile(header, currentPage);
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}
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}
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private int pageCount(long size) {
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int headerSize = conf.nameLength + conf.pageTypeSize * 2 + 6;
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return (int)(size + headerSize + conf.pageSize - 1) / conf.pageSize;
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}
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private int findFreeExtent(int pages) throws IOException {
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CoffeeHeader header;
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int currentPage = 0;
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int start = INVALID_PAGE;
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while(currentPage < (conf.fsSize / conf.pageSize)) {
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header = readHeader(currentPage);
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if (header.isFree()) {
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if (start == INVALID_PAGE) {
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start = currentPage;
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}
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currentPage = nextFile(header, currentPage);
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if (start + pages <= currentPage) {
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return start;
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}
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} else {
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start = INVALID_PAGE;
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currentPage = nextFile(header, currentPage);
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}
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}
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return INVALID_PAGE;
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}
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public CoffeeImage getImage() {
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return image;
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}
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public CoffeeConfiguration getConfiguration() {
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return conf;
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}
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public CoffeeHeader readHeader(int page) throws IOException {
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byte[] bytes = new byte[conf.nameLength + conf.pageTypeSize * 2 + 6];
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image.read(bytes, bytes.length, page * conf.pageSize);
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CoffeeHeader header = new CoffeeHeader(this, page, bytes);
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return header;
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}
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public void writeHeader(CoffeeHeader header) throws IOException {
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byte[] bytes = header.toRawHeader();
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image.write(bytes, bytes.length, header.getPage() * conf.pageSize);
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}
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private int nextFile(CoffeeHeader header, int page) {
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if (header.isFree()) {
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return page + conf.pagesPerSector & ~(conf.pagesPerSector - 1);
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} else if (header.isIsolated()) {
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return page + 1;
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}
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return page + header.maxPages;
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}
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public final Map<String, CoffeeFile> getFiles() {
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return files;
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}
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public CoffeeFile insertFile(String filename) throws IOException {
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return insertFile(new File(filename));
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}
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public CoffeeFile insertFile(File file) throws IOException {
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CoffeeFile coffeeFile;
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FileInputStream input = new FileInputStream(file);
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int allocatePages = pageCount(file.length());
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int start = findFreeExtent(allocatePages);
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if (start == INVALID_PAGE) {
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input.close();
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return null;
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}
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CoffeeHeader header = new CoffeeHeader(this, start);
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header.setName(file.getName());
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header.setReservedSize(allocatePages);
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header.allocate();
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coffeeFile = new CoffeeFile(this, header);
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writeHeader(header);
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coffeeFile.insertContents(input);
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input.close();
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return coffeeFile;
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}
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public void removeFile(String filename)
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throws CoffeeFileException, IOException {
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CoffeeFile file = files.get(filename);
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if (file == null) {
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throw new CoffeeFileException("Coffee: attempt to remove inexistent file");
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}
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file.remove();
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writeHeader(file.getHeader());
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files.remove(file.getName());
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}
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public boolean extractFile(String filename) throws IOException {
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return extractFile(filename, new File(filename));
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}
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public boolean extractFile(String fileInCoffee, File fileOnDisk) throws IOException {
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CoffeeFile file = files.get(fileInCoffee);
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if (file == null) {
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return false;
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}
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file.saveContents(fileOnDisk);
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return true;
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}
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public static class CoffeeException extends RuntimeException {
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private static final long serialVersionUID = 1146474084441011154L;
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public CoffeeException(String message) {
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super("Coffee error: " + message);
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}
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}
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public static class CoffeeFileException extends RuntimeException {
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private static final long serialVersionUID = -2954553141887245203L;
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public CoffeeFileException(String message) {
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super("Coffee file error: " + message);
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}
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}
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}
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