mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
/*
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This file is part of solidity.
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solidity 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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solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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#pragma once
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#include <libsolutil/Keccak256.h>
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#include <libsolutil/FixedHash.h>
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#include <string>
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namespace solidity::util
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{
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/// @returns the ABI selector for a given function signature, as a FixedHash h32.
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inline FixedHash<4> selectorFromSignatureH32(std::string const& _signature)
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{
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return FixedHash<4>(util::keccak256(_signature), FixedHash<4>::AlignLeft);
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}
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/// @returns the ABI selector for a given function signature, as a 32 bit number.
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inline uint32_t selectorFromSignatureU32(std::string const& _signature)
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{
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return uint32_t(FixedHash<4>::Arith(selectorFromSignatureH32(_signature)));
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}
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/// @returns the ABI selector for a given function signature, as a u256 (left aligned) number.
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inline u256 selectorFromSignatureU256(std::string const& _signature)
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{
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return u256(selectorFromSignatureU32(_signature)) << (256 - 32);
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}
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}
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