// Copyright (c) 2003 Jython project
package org.python.core;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.IOException;

/**
 * Utility methods for Java file handling.
 */
public class FileUtil
{
    /**
     * Read all bytes from the input stream.
     *
     * Note that using this method to read very large streams could
     * cause out-of-memory exceptions and/or block for large periods
     * of time.
     */
    public static byte[] readBytes( InputStream in )
	throws IOException
    {
	final int bufsize = 8192; // nice buffer size used in JDK
	byte[] buf = new byte[ bufsize ];
	ByteArrayOutputStream out =
	    new ByteArrayOutputStream( bufsize );
	int count;
	while( true )
	{
	    count = in.read( buf, 0, bufsize );
	    if ( count < 0 )
		break;
	    out.write( buf, 0, count );
	}
	return out.toByteArray();
    }
}