diff options
Diffstat (limited to 'CodeLocation.cpp')
| -rw-r--r-- | CodeLocation.cpp | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/CodeLocation.cpp b/CodeLocation.cpp new file mode 100644 index 00000000..2c9ca264 --- /dev/null +++ b/CodeLocation.cpp @@ -0,0 +1,59 @@ +/* + This file is part of cpp-ethereum. + + cpp-ethereum is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + cpp-ethereum 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 for more details. + + You should have received a copy of the GNU General Public License + along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>. +*/ +/** @file CodeLocation.cpp + * @author Gav Wood <i@gavwood.com> + * @date 2014 + */ + +#include "CodeLocation.h" +#include "CodeFragment.h" +using namespace std; +using namespace eth; + +CodeLocation::CodeLocation(CodeFragment* _f) +{ + m_f = _f; + m_pos = _f->m_code.size(); +} + +unsigned CodeLocation::get() const +{ + assert(m_f->m_code[m_pos - 1] == (byte)Instruction::PUSH4); + bytesConstRef r(&m_f->m_code[m_pos], 4); + return fromBigEndian<uint32_t>(r); +} + +void CodeLocation::set(unsigned _val) +{ + assert(m_f->m_code[m_pos - 1] == (byte)Instruction::PUSH4); + assert(!get()); + bytesRef r(&m_f->m_code[m_pos], 4); + toBigEndian(_val, r); +} + +void CodeLocation::anchor() +{ + set(m_f->m_code.size()); +} + +void CodeLocation::increase(unsigned _val) +{ + assert(m_f->m_code[m_pos - 1] == (byte)Instruction::PUSH4); + bytesRef r(&m_f->m_code[m_pos], 4); + toBigEndian(get() + _val, r); +} + |