01: /*
02: * read_char_no_hang.java
03: *
04: * Copyright (C) 2004 Peter Graves
05: * $Id: read_char_no_hang.java,v 1.3 2004/03/11 10:55:37 piso Exp $
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * 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: // ### read-char-no-hang
25: // read-char-no-hang &optional input-stream eof-error-p eof-value recursive-p => char
26: public final class read_char_no_hang extends Primitive {
27: private read_char_no_hang() {
28: super ("read-char-no-hang",
29: "&optional input-stream eof-error-p eof-value recursive-p");
30: }
31:
32: public LispObject execute(LispObject[] args)
33: throws ConditionThrowable {
34: int length = args.length;
35: if (length > 4)
36: signal(new WrongNumberOfArgumentsException(this ));
37: Stream stream = length > 0 ? inSynonymOf(args[0])
38: : getStandardInput();
39: boolean eofError = length > 1 ? (args[1] != NIL) : true;
40: LispObject eofValue = length > 2 ? args[2] : NIL;
41: boolean recursive = length > 3 ? (args[3] != NIL) : false;
42: return stream.readCharNoHang(eofError, eofValue);
43: }
44:
45: private static final Primitive READ_CHAR_NO_HANG = new read_char_no_hang();
46: }
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