01: /*
02: * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: package sun.tools.javap;
27:
28: import java.util.*;
29: import java.io.*;
30:
31: import static sun.tools.javap.RuntimeConstants.*;
32:
33: /* represents one entry of StackMap attribute
34: */
35: class StackMapData {
36: final int offset;
37: final int[] locals;
38: final int[] stack;
39:
40: StackMapData(int offset, int[] locals, int[] stack) {
41: this .offset = offset;
42: this .locals = locals;
43: this .stack = stack;
44: }
45:
46: StackMapData(DataInputStream in, MethodData method)
47: throws IOException {
48: offset = in.readUnsignedShort();
49: int local_size = in.readUnsignedShort();
50: locals = readTypeArray(in, local_size, method);
51: int stack_size = in.readUnsignedShort();
52: stack = readTypeArray(in, stack_size, method);
53: }
54:
55: static final int[] readTypeArray(DataInputStream in, int length,
56: MethodData method) throws IOException {
57: int[] types = new int[length];
58: for (int i = 0; i < length; i++) {
59: types[i] = readType(in, method);
60: }
61: return types;
62: }
63:
64: static final int readType(DataInputStream in, MethodData method)
65: throws IOException {
66: int type = in.readUnsignedByte();
67: if (type == ITEM_Object || type == ITEM_NewObject) {
68: type = type | (in.readUnsignedShort() << 8);
69: }
70: return type;
71: }
72:
73: void print(JavapPrinter p) {
74: p.out.println(" " + offset + ":");
75: p.printMap(" locals = [", locals);
76: p.printMap(" stack = [", stack);
77: }
78: }
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