27 lines
976 B
Solidity
27 lines
976 B
Solidity
// SPDX-License-Identifier: AGPL-3.0-or-later
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pragma solidity ^0.8.13;
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import "src/interfaces/ISwapAdapterTypes.sol";
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library FractionMath {
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/// @dev Compares two Fraction instances from ISwapAdapterTypes.
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/// @param frac1 The first Fraction instance.
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/// @param frac2 The second Fraction instance.
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/// @return int8 Returns 0 if fractions are equal, 1 if frac1 is greater, -1
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/// if frac1 is lesser.
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function compareFractions(
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ISwapAdapterTypes.Fraction memory frac1,
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ISwapAdapterTypes.Fraction memory frac2
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) internal pure returns (int8) {
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uint256 crossProduct1 = frac1.numerator * frac2.denominator;
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uint256 crossProduct2 = frac2.numerator * frac1.denominator;
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// fractions are equal
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if (crossProduct1 == crossProduct2) return 0;
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// frac1 is greater than frac2
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else if (crossProduct1 > crossProduct2) return 1;
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// frac1 is less than frac2
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else return -1;
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}
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}
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