/*
* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "classfile/classFileStream.hpp"
#include "classfile/vmSymbols.hpp"
void ClassFileStream::truncated_file_error(TRAPS) {
THROW_MSG(vmSymbols::java_lang_ClassFormatError(), "Truncated class file");
}
ClassFileStream::ClassFileStream(u1* buffer, int length, char* source) {
_buffer_start = buffer;
_buffer_end = buffer + length;
_current = buffer;
_source = source;
_need_verify = false;
}
u1 ClassFileStream::get_u1(TRAPS) {
if (_need_verify) {
guarantee_more(1, CHECK_0);
} else {
assert(1 <= _buffer_end - _current, "buffer overflow");
}
return *_current++;
}
u2 ClassFileStream::get_u2(TRAPS) {
if (_need_verify) {
guarantee_more(2, CHECK_0);
} else {
assert(2 <= _buffer_end - _current, "buffer overflow");
}
u1* tmp = _current;
_current += 2;
return Bytes::get_Java_u2(tmp);
}
u4 ClassFileStream::get_u4(TRAPS) {
if (_need_verify) {
guarantee_more(4, CHECK_0);
} else {
assert(4 <= _buffer_end - _current, "buffer overflow");
}
u1* tmp = _current;
_current += 4;
return Bytes::get_Java_u4(tmp);
}
u8 ClassFileStream::get_u8(TRAPS) {
if (_need_verify) {
guarantee_more(8, CHECK_0);
} else {
assert(8 <= _buffer_end - _current, "buffer overflow");
}
u1* tmp = _current;
_current += 8;
return Bytes::get_Java_u8(tmp);
}
void ClassFileStream::skip_u1(int length, TRAPS) {
if (_need_verify) {
guarantee_more(length, CHECK);
}
_current += length;
}
void ClassFileStream::skip_u2(int length, TRAPS) {
if (_need_verify) {
guarantee_more(length * 2, CHECK);
}
_current += length * 2;
}