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Common Lisp implementation running on the JVM
/*
* SynonymStream.java
*
* Copyright (C) 2004 Peter Graves
* $Id$
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent
* modules, and to copy and distribute the resulting executable under
* terms of your choice, provided that you also meet, for each linked
* independent module, the terms and conditions of the license of that
* module. An independent module is a module which is not derived from
* or based on this library. If you modify this library, you may extend
* this exception to your version of the library, but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package org.armedbear.lisp;
import static org.armedbear.lisp.Lisp.*;
public final class SynonymStream extends Stream
{
final Symbol symbol;
SynonymStream(Symbol symbol)
{
super(Symbol.SYNONYM_STREAM);
this.symbol = symbol;
}
@Override
public boolean isInputStream()
{
return checkStream(symbol.symbolValue()).isInputStream();
}
@Override
public boolean isOutputStream()
{
return checkStream(symbol.symbolValue()).isOutputStream();
}
@Override
public boolean isCharacterInputStream()
{
return checkStream(symbol.symbolValue()).isCharacterInputStream();
}
@Override
public boolean isBinaryInputStream()
{
return checkStream(symbol.symbolValue()).isBinaryInputStream();
}
@Override
public boolean isCharacterOutputStream()
{
return checkStream(symbol.symbolValue()).isCharacterOutputStream();
}
@Override
public boolean isBinaryOutputStream()
{
return checkStream(symbol.symbolValue()).isBinaryOutputStream();
}
@Override
public LispObject typeOf()
{
return Symbol.SYNONYM_STREAM;
}
@Override
public LispObject classOf()
{
return BuiltInClass.SYNONYM_STREAM;
}
@Override
public LispObject typep(LispObject typeSpecifier)
{
if (typeSpecifier == Symbol.SYNONYM_STREAM)
return T;
if (typeSpecifier == BuiltInClass.SYNONYM_STREAM)
return T;
return super.typep(typeSpecifier);
}
@Override
public LispObject getElementType()
{
return checkStream(symbol.symbolValue()).getElementType();
}
@Override
public LispObject listen()
{
return checkStream(symbol.symbolValue()).listen();
}
@Override
public LispObject fileLength()
{
return checkStream(symbol.symbolValue()).fileLength();
}
@Override
public LispObject fileStringLength(LispObject arg)
{
return checkStream(symbol.symbolValue()).fileStringLength(arg);
}
@Override
protected int _readChar() throws java.io.IOException
{
return checkStream(symbol.symbolValue())._readChar();
}
@Override
protected void _unreadChar(int n) throws java.io.IOException
{
checkStream(symbol.symbolValue())._unreadChar(n);
}
@Override
protected boolean _charReady() throws java.io.IOException
{
return checkStream(symbol.symbolValue())._charReady();
}
@Override
public void _writeChar(char c)
{
checkStream(symbol.symbolValue())._writeChar(c);
}
@Override
public void _writeChars(char[] chars, int start, int end)
{
checkStream(symbol.symbolValue())._writeChars(chars, start, end);
}
@Override
public void _writeString(String s)
{
checkStream(symbol.symbolValue())._writeString(s);
}
@Override
public void _writeLine(String s)
{
checkStream(symbol.symbolValue())._writeLine(s);
}
// Reads an 8-bit byte.
@Override
public int _readByte()
{
return checkStream(symbol.symbolValue())._readByte();
}
// Writes an 8-bit byte.
@Override
public void _writeByte(int n)
{
checkStream(symbol.symbolValue())._writeByte(n);
}
@Override
public void _finishOutput()
{
checkStream(symbol.symbolValue())._finishOutput();
}
@Override
public void _clearInput()
{
checkStream(symbol.symbolValue())._clearInput();
}
@Override
protected long _getFilePosition()
{
return checkStream(symbol.symbolValue())._getFilePosition();
}
@Override
protected boolean _setFilePosition(LispObject arg)
{
return checkStream(symbol.symbolValue())._setFilePosition(arg);
}
@Override
public void _close()
{
checkStream(symbol.symbolValue())._close();
}
@Override
public String printObject()
{
StringBuffer sb = new StringBuffer("SYNONYM-STREAM ");
sb.append(symbol.printObject());
return unreadableString(sb.toString());
}
// ### make-synonym-stream symbol => synonym-stream
private static final Primitive MAKE_SYNONYM_STREAM =
new Primitive("make-synonym-stream", "symbol")
{
@Override
public LispObject execute(LispObject arg)
{
return new SynonymStream(checkSymbol(arg));
}
};
// ### synonym-stream-symbol synonym-stream => symbol
private static final Primitive SYNONYM_STREAM_STREAMS =
new Primitive("synonym-stream-symbol", "synonym-stream")
{
@Override
public LispObject execute(LispObject arg)
{
if (arg instanceof SynonymStream)
return ((SynonymStream)arg).symbol;
return type_error(arg, Symbol.SYNONYM_STREAM);
}
};
}