Mercurial > hg > truffle
diff src/share/vm/classfile/classFileStream.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/classfile/classFileStream.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,94 @@ +/* + * Copyright 1997-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +#include "incls/_precompiled.incl" +#include "incls/_classFileStream.cpp.incl" + +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; +}