solidity/libyul/Utilities.cpp
2019-03-05 18:39:27 +01:00

88 lines
2.6 KiB
C++

/*
This file is part of solidity.
solidity 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.
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Some useful snippets for the optimiser.
*/
#include <libyul/Utilities.h>
#include <libyul/AsmData.h>
#include <libyul/Exceptions.h>
#include <libdevcore/CommonData.h>
#include <libdevcore/FixedHash.h>
using namespace std;
using namespace dev;
using namespace yul;
u256 yul::valueOfNumberLiteral(Literal const& _literal)
{
yulAssert(_literal.kind == LiteralKind::Number, "Expected number literal!");
std::string const& literalString = _literal.value.str();
yulAssert(isValidDecimal(literalString) || isValidHex(literalString), "Invalid number literal!");
return u256(literalString);
}
u256 yul::valueOfStringLiteral(Literal const& _literal)
{
yulAssert(_literal.kind == LiteralKind::String, "Expected string literal!");
yulAssert(_literal.value.str().size() <= 32, "Literal string too long!");
return u256(h256(_literal.value.str(), h256::FromBinary, h256::AlignLeft));
}
u256 yul::valueOfBoolLiteral(Literal const& _literal)
{
yulAssert(_literal.kind == LiteralKind::Boolean, "Expected bool literal!");
if (_literal.value == "true"_yulstring)
return u256(1);
else if (_literal.value == "false"_yulstring)
return u256(0);
yulAssert(false, "Unexpected bool literal value!");
}
u256 yul::valueOfLiteral(Literal const& _literal)
{
switch(_literal.kind)
{
case LiteralKind::Number:
return valueOfNumberLiteral(_literal);
case LiteralKind::Boolean:
return valueOfBoolLiteral(_literal);
case LiteralKind::String:
return valueOfStringLiteral(_literal);
default:
yulAssert(false, "Unexpected literal kind!");
}
}
template<>
bool Less<Literal>::operator()(Literal const& _lhs, Literal const& _rhs) const
{
if (std::make_tuple(_lhs.kind, _lhs.type) != std::make_tuple(_rhs.kind, _rhs.type))
return std::make_tuple(_lhs.kind, _lhs.type) < std::make_tuple(_rhs.kind, _rhs.type);
if (_lhs.kind == LiteralKind::Number)
return valueOfNumberLiteral(_lhs) < valueOfNumberLiteral(_rhs);
else
return _lhs.value < _rhs.value;
}