01: /*
02: * Readtable.java
03: *
04: * Copyright (C) 2003 Peter Graves
05: * $Id: Readtable.java,v 1.6 2003/11/15 11:03:34 beedlem 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: import java.util.ArrayList;
25:
26: public final class Readtable extends LispObject {
27: private ArrayList table = new ArrayList();
28:
29: public Readtable() {
30: }
31:
32: public LispObject getDispatchMacroCharacter(char dispChar,
33: char subChar) {
34: synchronized (table) {
35: for (int i = 0; i < table.size(); i++) {
36: Entry e = (Entry) table.get(i);
37: if (e.dispChar == dispChar && e.subChar == subChar)
38: return e.function;
39: }
40: }
41: return NIL;
42: }
43:
44: public LispObject setDispatchMacroCharacter(char dispChar,
45: char subChar, LispObject function) {
46: synchronized (table) {
47: for (int i = 0; i < table.size(); i++) {
48: Entry e = (Entry) table.get(i);
49: if (e.dispChar == dispChar && e.subChar == subChar) {
50: e.function = function;
51: return T;
52: }
53: }
54: // Not found.
55: table.add(new Entry(dispChar, subChar, function));
56: return T;
57: }
58: }
59:
60: private static class Entry {
61: char dispChar;
62: char subChar;
63: LispObject function;
64:
65: Entry(char dispChar, char subChar, LispObject function) {
66: this.dispChar = dispChar;
67: this.subChar = subChar;
68: this.function = function;
69: }
70: }
71: }
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