hyperlane-monorepo/solidity/contracts/libs/LibBit.sol

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity >=0.8.0;

/// @notice Library for bit shifting and masking
library LibBit {
    function setBit(
        uint256 _value,
        uint256 _index
    ) internal pure returns (uint256) {
        return _value | (1 << _index);
    }

    function clearBit(
        uint256 _value,
        uint256 _index
    ) internal pure returns (uint256) {
        return _value & ~(1 << _index);
    }

    function isBitSet(
        uint256 _value,
        uint256 _index
    ) internal pure returns (bool) {
        return (_value >> _index) & 1 == 1;
    }
}