1 /*
2 * Copyright (c) 1998, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package org.openjdk.buildtools.jdwpgen;
27
28 import java.util.*;
29 import java.io.*;
30 import java.lang.reflect.InvocationTargetException;
31
32 class Parse {
33
34 final StreamTokenizer izer;
35 final Map<String, Node> kindMap = new HashMap<String, Node>();
36
37 Parse(Reader reader) {
38 izer = new StreamTokenizer(new BufferedReader(reader));
39 izer.resetSyntax();
40 izer.slashStarComments(true);
41 izer.slashSlashComments(true);
42 izer.wordChars((int)'a', (int)'z');
43 izer.wordChars((int)'A', (int)'Z');
44 izer.wordChars((int)'0', (int)'9');
45 izer.wordChars((int)'_', (int)'_');
46 izer.wordChars((int)'-', (int)'-');
47 izer.wordChars((int)'.', (int)'.');
48 izer.whitespaceChars(0, 32);
49 izer.quoteChar('"');
50 izer.quoteChar('\'');
51
52 kindMap.put("CommandSet", new CommandSetNode());
53 kindMap.put("Command", new CommandNode());
54 kindMap.put("Out", new OutNode());
55 kindMap.put("Reply", new ReplyNode());
56 kindMap.put("ErrorSet", new ErrorSetNode());
57 kindMap.put("Error", new ErrorNode());
58 kindMap.put("Event", new EventNode());
59 kindMap.put("Repeat", new RepeatNode());
60 kindMap.put("Group", new GroupNode());
61 kindMap.put("Select", new SelectNode());
62 kindMap.put("Alt", new AltNode());
63 kindMap.put("ConstantSet", new ConstantSetNode());
64 kindMap.put("Constant", new ConstantNode());
65 kindMap.put("int", new IntTypeNode());
66 kindMap.put("long", new LongTypeNode());
67 kindMap.put("boolean", new BooleanTypeNode());
68 kindMap.put("object", new ObjectTypeNode());
69 kindMap.put("threadObject", new ThreadObjectTypeNode());
70 kindMap.put("threadGroupObject", new ThreadGroupObjectTypeNode());
71 kindMap.put("arrayObject", new ArrayObjectTypeNode());
72 kindMap.put("stringObject", new StringObjectTypeNode());
73 kindMap.put("classLoaderObject", new ClassLoaderObjectTypeNode());
74 kindMap.put("classObject", new ClassObjectTypeNode());
75 kindMap.put("referenceType", new ReferenceTypeNode());
76 kindMap.put("referenceTypeID", new ReferenceIDTypeNode());
77 kindMap.put("classType", new ClassTypeNode());
78 kindMap.put("interfaceType", new InterfaceTypeNode());
79 kindMap.put("arrayType", new ArrayTypeNode());
80 kindMap.put("method", new MethodTypeNode());
81 kindMap.put("field", new FieldTypeNode());
82 kindMap.put("frame", new FrameTypeNode());
83 kindMap.put("string", new StringTypeNode());
84 kindMap.put("moduleID", new ModuleTypeNode());
85 kindMap.put("value", new ValueTypeNode());
86 kindMap.put("byte", new ByteTypeNode());
87 kindMap.put("location", new LocationTypeNode());
88 kindMap.put("tagged-object", new TaggedObjectTypeNode());
89 kindMap.put("referenceTypeID", new ReferenceIDTypeNode());
90 kindMap.put("typed-sequence", new ArrayRegionTypeNode());
91 kindMap.put("untagged-value", new UntaggedValueTypeNode());
92 }
93
94 RootNode items() throws IOException {
95 List<Node> list = new ArrayList<Node>();
96
97 while (izer.nextToken() != StreamTokenizer.TT_EOF) {
98 izer.pushBack();
99 list.add(item());
100 }
101 RootNode node = new RootNode();
102 node.set("Root", list, 1);
103 return node;
104 }
105
106 Node item() throws IOException {
107 switch (izer.nextToken()) {
108 case StreamTokenizer.TT_EOF:
109 error("Unexpect end-of-file");
110 return null;
111
112 case StreamTokenizer.TT_WORD: {
113 String name = izer.sval;
114 if (izer.nextToken() == '=') {
115 int ntok = izer.nextToken();
116 if (ntok == StreamTokenizer.TT_WORD) {
117 return new NameValueNode(name, izer.sval);
118 } else if (ntok == '\'') {
119 return new NameValueNode(name, izer.sval.charAt(0));
120 } else {
121 error("Expected value after: " + name + " =");
122 return null;
123 }
124 } else {
125 izer.pushBack();
126 return new NameNode(name);
127 }
128 }
129
130 case '"':
131 return new CommentNode(izer.sval);
132
133 case '(': {
134 if (izer.nextToken() == StreamTokenizer.TT_WORD) {
135 String kind = izer.sval;
136 List<Node> list = new ArrayList<Node>();
137
138 while (izer.nextToken() != ')') {
139 izer.pushBack();
140 list.add(item());
141 }
142 Node proto = kindMap.get(kind);
143 if (proto == null) {
144 error("Invalid kind: " + kind);
145 return null;
146 } else {
147 try {
148 Node node = (Node)proto.getClass().getDeclaredConstructor().newInstance();
149 node.set(kind, list, izer.lineno());
150 return node;
151 } catch (InstantiationException exc) {
152 error(exc.toString());
153 return null;
154 } catch (NoSuchMethodException exc) {
155 error(exc.toString());
156 return null;
157 } catch (InvocationTargetException exc) {
158 error(exc.toString());
159 return null;
160 } catch (IllegalAccessException exc) {
161 error(exc.toString());
162 return null;
163 }
164 }
165 } else {
166 error("Expected kind identifier, got " + izer.ttype +
167 " : " + izer.sval);
168 return null;
169 }
170 }
171
172 default:
173 error("Unexpected character: '" + (char)izer.ttype + "'");
174 return null;
175 }
176 }
177
178 void error(String errmsg) {
179 System.err.println(Main.specSource + ":" + izer.lineno() +
180 ": " + errmsg);
181 throw new RuntimeException("Error: " + errmsg);
182 }
183 }