79 lines
2.2 KiB
Solidity
79 lines
2.2 KiB
Solidity
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// SPDX-License-Identifier: BUSL-1.1
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pragma solidity 0.8.16;
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pragma experimental ABIEncoderV2;
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import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
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/**
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* @title DecimalMath
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* @author DODO Breeder
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*
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* @notice Functions for fixed point number with 18 decimals
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*/
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library DecimalMath {
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uint256 internal constant ONE = 10 ** 18;
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uint256 internal constant ONE2 = 10 ** 36;
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function mul(uint256 target, uint256 d) internal pure returns (uint256) {
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return target * d / (10 ** 18);
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}
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function mulFloor(uint256 target, uint256 d) internal pure returns (uint256) {
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return target * d / (10 ** 18);
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}
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function mulCeil(uint256 target, uint256 d) internal pure returns (uint256) {
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return _divCeil(target * d, 10 ** 18);
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}
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function div(uint256 target, uint256 d) internal pure returns (uint256) {
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return target * (10 ** 18) / d;
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}
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function divFloor(uint256 target, uint256 d) internal pure returns (uint256) {
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return target * (10 ** 18) / d;
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}
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function divCeil(uint256 target, uint256 d) internal pure returns (uint256) {
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return _divCeil(target * (10 ** 18), d);
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}
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function reciprocalFloor(uint256 target) internal pure returns (uint256) {
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return uint256(10 ** 36) / target;
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}
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function reciprocalCeil(uint256 target) internal pure returns (uint256) {
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return _divCeil(uint256(10 ** 36), target);
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}
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function sqrt(uint256 target) internal pure returns (uint256) {
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return Math.sqrt(target * ONE);
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}
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function powFloor(uint256 target, uint256 e) internal pure returns (uint256) {
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if (e == 0) {
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return 10 ** 18;
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} else if (e == 1) {
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return target;
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} else {
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uint256 p = powFloor(target, e / 2);
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p = p * p / (10 ** 18);
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if (e % 2 == 1) {
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p = p * target / (10 ** 18);
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}
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return p;
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}
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}
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function _divCeil(uint256 a, uint256 b) internal pure returns (uint256) {
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uint256 quotient = a / b;
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uint256 remainder = a - quotient * b;
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if (remainder > 0) {
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return quotient + 1;
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} else {
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return quotient;
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}
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}
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}
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