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comparison graal/com.oracle.truffle.ruby.runtime/src/com/oracle/truffle/ruby/runtime/core/RubyRegexp.java @ 13514:0fbee3eb71f0

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Ruby: import project.
author Chris Seaton <chris.seaton@oracle.com>
date Mon, 06 Jan 2014 17:12:09 +0000
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13513:64a23ce736a0 13514:0fbee3eb71f0
1 /*
2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
4 * redistribute it and/or modify it under the terms of the:
5 *
6 * Eclipse Public License version 1.0
7 * GNU General Public License version 2
8 * GNU Lesser General Public License version 2.1
9 */
10 package com.oracle.truffle.ruby.runtime.core;
11
12 import java.util.regex.*;
13
14 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
15 import com.oracle.truffle.api.frame.*;
16 import com.oracle.truffle.ruby.runtime.*;
17 import com.oracle.truffle.ruby.runtime.objects.*;
18
19 /**
20 * Represents the Ruby {@code Regexp} class.
21 */
22 public class RubyRegexp extends RubyObject {
23
24 /**
25 * The class from which we create the object that is {@code Regexp}. A subclass of
26 * {@link RubyClass} so that we can override {@link #newInstance} and allocate a
27 * {@link RubyRegexp} rather than a normal {@link RubyBasicObject}.
28 */
29 public static class RubyRegexpClass extends RubyClass {
30
31 public RubyRegexpClass(RubyClass objectClass) {
32 super(null, objectClass, "Regexp");
33 }
34
35 @Override
36 public RubyBasicObject newInstance() {
37 return new RubyRegexp(getContext().getCoreLibrary().getRegexpClass());
38 }
39
40 }
41
42 @CompilationFinal private Pattern pattern;
43
44 public RubyRegexp(RubyClass regexpClass) {
45 super(regexpClass);
46 }
47
48 public RubyRegexp(RubyClass regexpClass, String pattern) {
49 this(regexpClass);
50 initialize(compile(pattern));
51 }
52
53 public RubyRegexp(RubyClass regexpClass, Pattern pattern) {
54 this(regexpClass);
55 initialize(pattern);
56 }
57
58 public void initialize(String setPattern) {
59 pattern = compile(setPattern);
60 }
61
62 public void initialize(Pattern setPattern) {
63 pattern = setPattern;
64 }
65
66 public Object matchOperator(Frame frame, String string) {
67 final RubyContext context = getRubyClass().getContext();
68
69 final Matcher matcher = pattern.matcher(string);
70
71 if (matcher.find()) {
72 for (int n = 1; n < matcher.groupCount() + 1; n++) {
73 final FrameSlot slot = frame.getFrameDescriptor().findFrameSlot("$" + n);
74
75 if (slot != null) {
76 frame.setObject(slot, context.makeString(matcher.group(n)));
77 }
78 }
79
80 return matcher.start();
81 } else {
82 return NilPlaceholder.INSTANCE;
83 }
84 }
85
86 public Pattern getPattern() {
87 return pattern;
88 }
89
90 public Object match(String string) {
91 final RubyContext context = getRubyClass().getContext();
92
93 final Matcher matcher = pattern.matcher(string);
94
95 if (!matcher.find()) {
96 return NilPlaceholder.INSTANCE;
97 }
98
99 final Object[] values = new Object[matcher.groupCount() + 1];
100
101 for (int n = 0; n < matcher.groupCount() + 1; n++) {
102 final String group = matcher.group(n);
103
104 if (group == null) {
105 values[n] = NilPlaceholder.INSTANCE;
106 } else {
107 values[n] = context.makeString(group);
108 }
109 }
110
111 return new RubyMatchData(context.getCoreLibrary().getMatchDataClass(), values);
112 }
113
114 @Override
115 public int hashCode() {
116 return pattern.pattern().hashCode();
117 }
118
119 @Override
120 public boolean equals(Object obj) {
121 if (this == obj) {
122 return true;
123 }
124 if (obj == null) {
125 return false;
126 }
127 if (!(obj instanceof RubyRegexp)) {
128 return false;
129 }
130 RubyRegexp other = (RubyRegexp) obj;
131 if (pattern == null) {
132 if (other.pattern != null) {
133 return false;
134 }
135 } else if (!pattern.pattern().equals(other.pattern.pattern())) {
136 return false;
137 }
138 return true;
139 }
140
141 public static Pattern compile(String pattern) {
142 return Pattern.compile(pattern, Pattern.MULTILINE | Pattern.UNIX_LINES);
143 }
144 }