chriseth
10 years ago
9 changed files with 276 additions and 56 deletions
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/*
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This file is part of cpp-ethereum. |
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cpp-ethereum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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cpp-ethereum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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/**
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* @author Christian <c@ethdev.com> |
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* @date 2014 |
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* Routines used by both the compiler and the expression compiler. |
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*/ |
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#include <libsolidity/CompilerUtils.h> |
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#include <libsolidity/AST.h> |
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#include <libevmcore/Instruction.h> |
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using namespace std; |
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namespace dev |
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{ |
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namespace solidity |
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{ |
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void CompilerUtils::moveToStackVariable(VariableDeclaration const& _variable) |
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{ |
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unsigned const stackPosition = m_context.baseToCurrentStackOffset(m_context.getBaseStackOffsetOfVariable(_variable)); |
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unsigned const size = _variable.getType()->getSizeOnStack(); |
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// move variable starting from its top end in the stack
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if (stackPosition - size + 1 > 16) |
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BOOST_THROW_EXCEPTION(CompilerError() << errinfo_sourceLocation(_variable.getLocation()) |
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<< errinfo_comment("Stack too deep.")); |
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for (unsigned i = 0; i < size; ++i) |
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m_context << eth::swapInstruction(stackPosition - size + 1) << eth::Instruction::POP; |
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} |
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void CompilerUtils::copyToStackTop(unsigned _stackDepth, Type const& _type) |
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{ |
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if (_stackDepth > 16) |
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BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Stack too deep.")); |
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unsigned const size = _type.getSizeOnStack(); |
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for (unsigned i = 0; i < size; ++i) |
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m_context << eth::dupInstruction(_stackDepth); |
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} |
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void CompilerUtils::popStackElement(Type const& _type) |
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{ |
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unsigned const size = _type.getSizeOnStack(); |
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for (unsigned i = 0; i < size; ++i) |
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m_context << eth::Instruction::POP; |
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} |
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unsigned CompilerUtils::getSizeOnStack(vector<shared_ptr<Type const>> const& _variableTypes) |
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{ |
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unsigned size = 0; |
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for (shared_ptr<Type const> const& type: _variableTypes) |
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size += type->getSizeOnStack(); |
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return size; |
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} |
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} |
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} |
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@ -0,0 +1,63 @@ |
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/*
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This file is part of cpp-ethereum. |
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|
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cpp-ethereum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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|
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cpp-ethereum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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/**
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* @author Christian <c@ethdev.com> |
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* @date 2014 |
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* Routines used by both the compiler and the expression compiler. |
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*/ |
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#pragma once |
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#include <libsolidity/CompilerContext.h> |
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#include <libsolidity/ASTForward.h> |
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namespace dev { |
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namespace solidity { |
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class Type; // forward
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class CompilerUtils |
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{ |
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public: |
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CompilerUtils(CompilerContext& _context): m_context(_context) {} |
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/// Moves the value that is at the top of the stack to a stack variable.
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void moveToStackVariable(VariableDeclaration const& _variable); |
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/// Copies a variable of type @a _type from a stack depth of @a _stackDepth to the top of the stack.
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void copyToStackTop(unsigned _stackDepth, Type const& _type); |
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/// Removes the current value from the top of the stack.
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void popStackElement(Type const& _type); |
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template <class T> |
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static unsigned getSizeOnStack(std::vector<T> const& _variables); |
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static unsigned getSizeOnStack(std::vector<std::shared_ptr<Type const>> const& _variableTypes); |
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private: |
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CompilerContext& m_context; |
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}; |
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template <class T> |
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unsigned CompilerUtils::getSizeOnStack(std::vector<T> const& _variables) |
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{ |
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unsigned size = 0; |
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for (T const& variable: _variables) |
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size += variable->getType()->getSizeOnStack(); |
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return size; |
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} |
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} |
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} |
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