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comparison src/share/vm/classfile/classFileStream.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1997-2005 Sun Microsystems, Inc. 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_classFileStream.cpp.incl"
27
28 void ClassFileStream::truncated_file_error(TRAPS) {
29 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), "Truncated class file");
30 }
31
32 ClassFileStream::ClassFileStream(u1* buffer, int length, char* source) {
33 _buffer_start = buffer;
34 _buffer_end = buffer + length;
35 _current = buffer;
36 _source = source;
37 _need_verify = false;
38 }
39
40 u1 ClassFileStream::get_u1(TRAPS) {
41 if (_need_verify) {
42 guarantee_more(1, CHECK_0);
43 } else {
44 assert(1 <= _buffer_end - _current, "buffer overflow");
45 }
46 return *_current++;
47 }
48
49 u2 ClassFileStream::get_u2(TRAPS) {
50 if (_need_verify) {
51 guarantee_more(2, CHECK_0);
52 } else {
53 assert(2 <= _buffer_end - _current, "buffer overflow");
54 }
55 u1* tmp = _current;
56 _current += 2;
57 return Bytes::get_Java_u2(tmp);
58 }
59
60 u4 ClassFileStream::get_u4(TRAPS) {
61 if (_need_verify) {
62 guarantee_more(4, CHECK_0);
63 } else {
64 assert(4 <= _buffer_end - _current, "buffer overflow");
65 }
66 u1* tmp = _current;
67 _current += 4;
68 return Bytes::get_Java_u4(tmp);
69 }
70
71 u8 ClassFileStream::get_u8(TRAPS) {
72 if (_need_verify) {
73 guarantee_more(8, CHECK_0);
74 } else {
75 assert(8 <= _buffer_end - _current, "buffer overflow");
76 }
77 u1* tmp = _current;
78 _current += 8;
79 return Bytes::get_Java_u8(tmp);
80 }
81
82 void ClassFileStream::skip_u1(int length, TRAPS) {
83 if (_need_verify) {
84 guarantee_more(length, CHECK);
85 }
86 _current += length;
87 }
88
89 void ClassFileStream::skip_u2(int length, TRAPS) {
90 if (_need_verify) {
91 guarantee_more(length * 2, CHECK);
92 }
93 _current += length * 2;
94 }