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Java > Open Source Codes > org > armedbear > lisp > file_length


1 /*
2  * file_length.java
3  *
4  * Copyright (C) 2004 Peter Graves
5  * $Id: file_length.java,v 1.4 2004/05/12 16:45:26 piso Exp $
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * as published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20  */
21
22 package org.armedbear.lisp;
23
24 public final class file_length extends Primitive1
25 {
26     private file_length()
27     {
28         super("file-length", "stream");
29     }
30
31     // ### file-length
32 // file-length stream => length
33 public LispObject execute(LispObject arg) throws ConditionThrowable
34     {
35         try {
36             return ((Stream)arg).fileLength();
37         }
38         catch (ClassCastException JavaDoc e) {
39             return signal(new TypeError(arg, Symbol.STREAM));
40         }
41     }
42
43     private static final Primitive1 FILE_LENGTH = new file_length();
44 }
45
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