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/*
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/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2014
* Solidity AST to EVM bytecode compiler.
*/
#include <ostream>
#include <functional>
#include <libsolidity/ASTVisitor.h>
#include <libsolidity/CompilerContext.h>
namespace dev {
namespace solidity {
class Compiler: private ASTConstVisitor
{
public:
explicit Compiler(bool _optimize = false): m_optimize(_optimize), m_context(),
m_returnTag(m_context.newTag()) {}
void compileContract(ContractDefinition const& _contract,
std::map<ContractDefinition const*, bytes const*> const& _contracts);
bytes getAssembledBytecode() { return m_context.getAssembledBytecode(m_optimize); }
bytes getRuntimeBytecode() { return m_runtimeContext.getAssembledBytecode(m_optimize);}
void streamAssembly(std::ostream& _stream) const { m_context.streamAssembly(_stream); }
private:
/// Registers the non-function objects inside the contract with the context.
void initializeContext(ContractDefinition const& _contract,
std::map<ContractDefinition const*, bytes const*> const& _contracts);
/// Adds the code that is run at creation time. Should be run after exchanging the run-time context
/// with a new and initialized context. Adds the constructor code.
void packIntoContractCreator(ContractDefinition const& _contract, CompilerContext const& _runtimeContext);
void appendBaseConstructorCall(FunctionDefinition const& _constructor,
std::vector<ASTPointer<Expression>> const& _arguments);
void appendConstructorCall(FunctionDefinition const& _constructor);
/// Recursively searches the call graph and returns all functions referenced inside _nodes.
/// _resolveOverride is called to resolve virtual function overrides.
std::set<FunctionDefinition const*> getFunctionsCalled(std::set<ASTNode const*> const& _nodes,
std::function<FunctionDefinition const*(std::string const&)> const& _resolveFunctionOverride,
std::function<ModifierDefinition const*(std::string const&)> const& _resolveModifierOverride);
void appendFunctionSelector(ContractDefinition const& _contract);
/// Creates code that unpacks the arguments for the given function represented by a vector of TypePointers.
/// From memory if @a _fromMemory is true, otherwise from call data. @returns the size of the data in bytes.
unsigned appendCalldataUnpacker(TypePointers const& _typeParameters, bool _fromMemory = false);
void appendReturnValuePacker(TypePointers const& _typeParameters);
void registerStateVariables(ContractDefinition const& _contract);
void generateAccessorCode(VariableDeclaration const& _varDecl);
virtual bool visit(FunctionDefinition const& _function) override;
virtual bool visit(IfStatement const& _ifStatement) override;
virtual bool visit(WhileStatement const& _whileStatement) override;
virtual bool visit(ForStatement const& _forStatement) override;
virtual bool visit(Continue const& _continue) override;
virtual bool visit(Break const& _break) override;
virtual bool visit(Return const& _return) override;
virtual bool visit(VariableDefinition const& _variableDefinition) override;
virtual bool visit(ExpressionStatement const& _expressionStatement) override;
virtual bool visit(PlaceholderStatement const&) override;
/// Appends one layer of function modifier code of the current function, or the function
/// body itself if the last modifier was reached.
void appendModifierOrFunctionCode();
void compileExpression(Expression const& _expression, TypePointer const& _targetType = TypePointer());
bool const m_optimize;
CompilerContext m_context;
CompilerContext m_runtimeContext;
std::vector<eth::AssemblyItem> m_breakTags; ///< tag to jump to for a "break" statement
std::vector<eth::AssemblyItem> m_continueTags; ///< tag to jump to for a "continue" statement
eth::AssemblyItem m_returnTag; ///< tag to jump to for a "return" statement
unsigned m_modifierDepth = 0;
FunctionDefinition const* m_currentFunction;
unsigned m_stackCleanupForReturn; ///< this number of stack elements need to be removed before jump to m_returnTag
};
}
}
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