1 /*
2 * Copyright (c) 1998, 2016, 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 build.tools.jdwpgen;
27
28 import java.util.*;
29 import java.io.*;
30
31 class Parse {
32
33 final StreamTokenizer izer;
34 final Map<String, Node> kindMap = new HashMap<String, Node>();
35
36 Parse(Reader reader) {
37 izer = new StreamTokenizer(new BufferedReader(reader));
38 izer.resetSyntax();
39 izer.slashStarComments(true);
40 izer.slashSlashComments(true);
41 izer.wordChars((int)'a', (int)'z');
42 izer.wordChars((int)'A', (int)'Z');
43 izer.wordChars((int)'0', (int)'9');
44 izer.wordChars((int)'_', (int)'_');
45 izer.wordChars((int)'-', (int)'-');
46 izer.wordChars((int)'.', (int)'.');
47 izer.whitespaceChars(0, 32);
48 izer.quoteChar('"');
49 izer.quoteChar('\'');
50
51 kindMap.put("CommandSet", new CommandSetNode());
52 kindMap.put("Command", new CommandNode());
53 kindMap.put("Out", new OutNode());
54 kindMap.put("Reply", new ReplyNode());
55 kindMap.put("ErrorSet", new ErrorSetNode());
56 kindMap.put("Error", new ErrorNode());
57 kindMap.put("Event", new EventNode());
58 kindMap.put("Repeat", new RepeatNode());
59 kindMap.put("Group", new GroupNode());
60 kindMap.put("Select", new SelectNode());
61 kindMap.put("Alt", new AltNode());
62 kindMap.put("ConstantSet", new ConstantSetNode());
63 kindMap.put("Constant", new ConstantNode());
64 kindMap.put("int", new IntTypeNode());
65 kindMap.put("long", new LongTypeNode());
66 kindMap.put("boolean", new BooleanTypeNode());
67 kindMap.put("object", new ObjectTypeNode());
68 kindMap.put("threadObject", new ThreadObjectTypeNode());
69 kindMap.put("threadGroupObject", new ThreadGroupObjectTypeNode());
70 kindMap.put("arrayObject", new ArrayObjectTypeNode());
71 kindMap.put("stringObject", new StringObjectTypeNode());
72 kindMap.put("classLoaderObject", new ClassLoaderObjectTypeNode());
73 kindMap.put("classObject", new ClassObjectTypeNode());
74 kindMap.put("referenceType", new ReferenceTypeNode());
75 kindMap.put("referenceTypeID", new ReferenceIDTypeNode());
76 kindMap.put("classType", new ClassTypeNode());
77 kindMap.put("interfaceType", new InterfaceTypeNode());
78 kindMap.put("arrayType", new ArrayTypeNode());
79 kindMap.put("method", new MethodTypeNode());
80 kindMap.put("field", new FieldTypeNode());
81 kindMap.put("frame", new FrameTypeNode());
82 kindMap.put("string", new StringTypeNode());
83 kindMap.put("moduleID", new ModuleTypeNode());
84 kindMap.put("value", new ValueTypeNode());
85 kindMap.put("byte", new ByteTypeNode());
86 kindMap.put("location", new LocationTypeNode());
87 kindMap.put("tagged-object", new TaggedObjectTypeNode());
88 kindMap.put("referenceTypeID", new ReferenceIDTypeNode());
89 kindMap.put("typed-sequence", new ArrayRegionTypeNode());
90 kindMap.put("untagged-value", new UntaggedValueTypeNode());
91 }
92
93 RootNode items() throws IOException {
94 List<Node> list = new ArrayList<Node>();
95
96 while (izer.nextToken() != StreamTokenizer.TT_EOF) {
97 izer.pushBack();
98 list.add(item());
99 }
100 RootNode node = new RootNode();
101 node.set("Root", list, 1);
102 return node;
103 }
104
105 Node item() throws IOException {
106 switch (izer.nextToken()) {
107 case StreamTokenizer.TT_EOF:
108 error("Unexpect end-of-file");
109 return null;
110
111 case StreamTokenizer.TT_WORD: {
112 String name = izer.sval;
113 if (izer.nextToken() == '=') {
114 int ntok = izer.nextToken();
115 if (ntok == StreamTokenizer.TT_WORD) {
116 return new NameValueNode(name, izer.sval);
117 } else if (ntok == '\'') {
118 return new NameValueNode(name, izer.sval.charAt(0));
119 } else {
120 error("Expected value after: " + name + " =");
121 return null;
122 }
123 } else {
124 izer.pushBack();
125 return new NameNode(name);
126 }
127 }
128
129 case '"':
130 return new CommentNode(izer.sval);
131
132 case '(': {
133 if (izer.nextToken() == StreamTokenizer.TT_WORD) {
134 String kind = izer.sval;
135 List<Node> list = new ArrayList<Node>();
136
137 while (izer.nextToken() != ')') {
138 izer.pushBack();
139 list.add(item());
140 }
141 Node proto = kindMap.get(kind);
142 if (proto == null) {
143 error("Invalid kind: " + kind);
144 return null;
145 } else {
146 try {
147 Node node = (Node)proto.getClass().newInstance();
148 node.set(kind, list, izer.lineno());
149 return node;
150 } catch (InstantiationException exc) {
151 error(exc.toString());
152 return null;
153 } catch (IllegalAccessException exc) {
154 error(exc.toString());
155 return null;
156 }
157 }
158 } else {
159 error("Expected kind identifier, got " + izer.ttype +
160 " : " + izer.sval);
161 return null;
162 }
163 }
164
165 default:
166 error("Unexpected character: '" + (char)izer.ttype + "'");
167 return null;
168 }
169 }
170
171 void error(String errmsg) {
172 System.err.println(Main.specSource + ":" + izer.lineno() +
173 ": " + errmsg);
174 throw new RuntimeException("Error: " + errmsg);
175 }
176 }