/* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
* file except in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
* OF ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
package com.ning.compress.lzf;
import java.io.*;
import com.ning.compress.lzf.util.LZFFileInputStream;
import com.ning.compress.lzf.util.LZFFileOutputStream;
/**
* Simple command-line utility that can be used for testing LZF
* compression, or as rudimentary command-line tool.
* Arguments are the same as used by the "standard" lzf command line tool
*
* @author Tatu Saloranta (tatu@ning.com)
*/
public class LZF
{
public final static String SUFFIX = ".lzf";
protected void process(String[] args) throws IOException
{
if (args.length == 2) {
String oper = args[0];
boolean compress = "-c".equals(oper);
boolean toSystemOutput = !compress && "-o".equals(oper);
if (compress || toSystemOutput || "-d".equals(oper)) {
String filename = args[1];
File src = new File(filename);
if (!src.exists()) {
System.err.println("File '"+filename+"' does not exist.");
System.exit(1);
}
if (!compress && !filename.endsWith(SUFFIX)) {
System.err.println("File '"+filename+"' does end with expected suffix ('"+SUFFIX+"', won't decompress.");
System.exit(1);
}
if (compress) {
int inputLength = 0;
File resultFile = new File(filename+SUFFIX);
InputStream in = new FileInputStream(src);
OutputStream out = new LZFFileOutputStream(resultFile);
byte[] buffer = new byte[8192];
int bytesRead;
while ((bytesRead = in.read(buffer, 0, buffer.length)) != -1) {
inputLength += bytesRead;
out.write(buffer, 0, bytesRead);
}
in.close();
out.flush();
out.close();
System.out.printf("Compressed '%s' into '%s' (%d->%d bytes)\n",
src.getPath(), resultFile.getPath(),
inputLength, resultFile.length());
} else {
OutputStream out;
LZFFileInputStream in = new LZFFileInputStream(src);
File resultFile = null;
if (toSystemOutput) {
out = System.out;
} else {
resultFile = new File(filename.substring(0, filename.length() - SUFFIX.length()));
out = new FileOutputStream(resultFile);
}
int uncompLen = in.readAndWrite(out);
in.close();
out.flush();
out.close();
if (resultFile != null) {
System.out.printf("Uncompressed '%s' into '%s' (%d->%d bytes)\n",
src.getPath(), resultFile.getPath(),
src.length(), uncompLen);
}
}
return;
}
}
System.err.println("Usage: java "+getClass().getName()+" -c/-d/-o source-file");
System.err.println(" -d parameter: decompress to file");
System.err.println(" -c parameter: compress to file");
System.err.println(" -o parameter: decompress to stdout");
System.exit(1);
}
public static void main(String[] args) throws IOException {
new LZF().process(args);
}
}