commandreader.java

java 文件下载器。可自定义

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   CommandReader.java

package org.gudy.azureus2.ui.console;

import java.io.IOException;
import java.io.Reader;
import java.util.List;
import java.util.Vector;

public class CommandReader extends Reader
{

	private final int ENTER = 0;
	private final int TAB = 1;
	private final int QUOTE = 3;
	private final int ESCAPE = 4;
	private final int NONQUOTEDESCAPE = 5;
	private Reader in;

	public CommandReader(Reader _in)
	{
		in = _in;
	}

	private void ensureOpen()
		throws IOException
	{
		if (in == null)
			throw new IOException("Stream closed");
		else
			return;
	}

	public void close()
		throws IOException
	{
		synchronized (lock)
		{
			if (in != null)
			{
				in.close();
				in = null;
			}
		}
	}

	public int read()
		throws IOException
	{
		Object obj = lock;
		JVM INSTR monitorenter ;
		ensureOpen();
		return in.read();
		Exception exception;
		exception;
		throw exception;
	}

	public int read(char cbuf[], int off, int len)
		throws IOException
	{
		Object obj = lock;
		JVM INSTR monitorenter ;
		ensureOpen();
		return in.read(cbuf, off, len);
		Exception exception;
		exception;
		throw exception;
	}

	public String readLine()
		throws IOException
	{
		Object obj = lock;
		JVM INSTR monitorenter ;
		StringBuffer line;
		ensureOpen();
		line = new StringBuffer();
		int ch;
		while ((char)(ch = in.read()) != '\n') 
		{
			if (ch == -1)
				throw new IOException("stream closed");
			line.append((char)ch);
		}
		return line.toString().trim();
		Exception exception;
		exception;
		throw exception;
	}

	public List parseCommandLine(String commandLine)
	{
		StringBuffer current = new StringBuffer();
		Vector args = new Vector();
		boolean allowEmpty = false;
		boolean bailout = commandLine.length() == 0;
		int index = 0;
		int state = 0;
		do
			if (!bailout)
			{
				int ch = commandLine.charAt(index++);
				bailout = index == commandLine.length();
				char c = (char)ch;
				switch (state)
				{
				case 0: // '\0'
					switch (c)
					{
					case 34: // '"'
						state = 3;
						break;

					case 92: // '\\'
						state = 5;
						break;

					default:
						current.append(c);
						break;

					case 13: // '\r'
						break;
					}
					if (state == 0 && (c == ' ' || bailout))
					{
						String arg = current.toString().trim();
						if (arg.length() > 0 || allowEmpty)
						{
							args.addElement(arg);
							allowEmpty = false;
						}
						current = new StringBuffer();
					}
					break;

				case 3: // '\003'
					switch (c)
					{
					case 34: // '"'
						allowEmpty = true;
						state = 0;
						break;

					case 92: // '\\'
						state = 4;
						break;

					default:
						current.append(c);
						break;
					}
					break;

				case 4: // '\004'
					switch (c)
					{
					case 110: // 'n'
						c = '\n';
						break;

					case 114: // 'r'
						c = '\r';
						break;

					case 116: // 't'
						c = '\t';
						break;

					case 98: // 'b'
						c = '\b';
						break;

					case 102: // 'f'
						c = '\f';
						break;

					default:
						current.append('\\');
						break;
					}
					state = 3;
					current.append(c);
					break;

				case 5: // '\005'
					switch (c)
					{
					case 59: // ';'
						state = 0;
						current.append(c);
						break;

					default:
						state = 0;
						current.append('\\');
						current.append(c);
						break;
					}
					break;
				}
			} else
			{
				if (state == 0 && (current.toString().trim().length() > 0 || allowEmpty))
				{
					String arg = current.toString().trim();
					args.addElement(arg);
				}
				return args;
			}
		while (true);
	}
}