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Adding msg.sig Solidity Magic type

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msg.sig will return a bytes4 with the function signature located in CALLDATALOAD
This commit is contained in:
Lefteris Karapetsas 2015-03-13 17:36:00 +01:00
parent 039b133c18
commit d7ffba1504
2 changed files with 4 additions and 1 deletions
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2
ExpressionCompiler.cpp
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@ -646,6 +646,8 @@ void ExpressionCompiler::endVisit(MemberAccess const& _memberAccess)
m_context << eth::Instruction::GASPRICE;
else if (member == "data")
m_context << u256(0) << eth::Instruction::CALLDATASIZE;
else if (member == "sig")
m_context << u256(0) << eth::Instruction::CALLDATALOAD << (u256(0xffffffff) << (256 - 32))<< eth::Instruction::AND;
else
BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown magic member."));
break;

3
Types.cpp
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@ -1160,7 +1160,8 @@ MagicType::MagicType(MagicType::Kind _kind):
m_members = MemberList({{"sender", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
{"gas", make_shared<IntegerType>(256)},
{"value", make_shared<IntegerType>(256)},
{"data", make_shared<ArrayType>(ArrayType::Location::CallData)}});
{"data", make_shared<ArrayType>(ArrayType::Location::CallData)},
{"sig", make_shared<FixedBytesType>(4)}});
break;
case Kind::Transaction:
m_members = MemberList({{"origin", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},