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1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
8  *
9  * Software distributed under the License is distributed on an "AS
10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
12  * rights and limitations under the License.
13  *
14  * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
15  * Copyright (C) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
16  * Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
17  * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
18  *
19  * Alternatively, the contents of this file may be used under the terms of
20  * either of the GNU General Public License Version 2 or later (the "GPL"),
21  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
22  * in which case the provisions of the GPL or the LGPL are applicable instead
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30  ***** END LICENSE BLOCK *****/
31 package org.jruby;
32
33 import org.jruby.runtime.Block;
34 import org.jruby.runtime.CallbackFactory;
35 import org.jruby.runtime.builtin.IRubyObject;
36
37 /**
38  *
39  * @author jpetersen
40  */
41 public class RubyPrecision {
42     
43     public static RubyModule createPrecisionModule(Ruby runtime) {
44         RubyModule precisionModule = runtime.defineModule("Precision");
45         CallbackFactory callbackFactory = runtime.callbackFactory(RubyPrecision.class);
46         precisionModule.defineSingletonMethod("append_features", callbackFactory.getSingletonMethod("append_features", RubyKernel.IRUBY_OBJECT));
47         precisionModule.defineMethod("prec", callbackFactory.getSingletonMethod("prec", RubyKernel.IRUBY_OBJECT));
48         precisionModule.defineMethod("prec_i", callbackFactory.getSingletonMethod("prec_i"));
49         precisionModule.defineMethod("prec_f", callbackFactory.getSingletonMethod("prec_f"));
50         return precisionModule;
51     }
52
53     public static IRubyObject induced_from(IRubyObject receiver, IRubyObject source) {
54         throw receiver.getRuntime().newTypeError("Undefined conversion from " + source.getMetaClass().getName() + " into " + ((RubyClass)receiver).getName());
55     }
56
57     public static IRubyObject append_features(IRubyObject receiver, IRubyObject include, Block block) {
58         if (include instanceof RubyModule) {
59             ((RubyModule) include).includeModule(receiver);
60             CallbackFactory f = receiver.getRuntime().callbackFactory(RubyPrecision.class);
61             include.defineSingletonMethod("induced_from", f.getSingletonMethod("induced_from", RubyKernel.IRUBY_OBJECT));
62         }
63         return receiver;
64     }
65     
66     public static IRubyObject prec(IRubyObject receiver, IRubyObject type, Block block) {
67         return type.callMethod(receiver.getRuntime().getCurrentContext(), "induced_from", receiver);
68     }
69
70     public static IRubyObject prec_i(IRubyObject receiver, Block block) {
71         return receiver.getRuntime().getClass("Integer").callMethod(receiver.getRuntime().getCurrentContext(), "induced_from", receiver);
72     }
73
74     public static IRubyObject prec_f(IRubyObject receiver, Block block) {
75         return receiver.getRuntime().getClass("Float").callMethod(receiver.getRuntime().getCurrentContext(), "induced_from", receiver);
76     }
77 }
78
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