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@0x/contracts-staking: Add uintMul() function to LibFixedMath.

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Lawrence Forman
2019-08-24 15:18:58 -04:00
committed by Lawrence Forman
parent 93c8284a96
commit c1fc454d19
1 changed files with 11 additions and 0 deletions
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11
contracts/staking/contracts/src/libs/LibFixedMath.sol
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@@ -38,6 +38,17 @@ library LibFixedMath {
c = _div(_mul(a, FIXED_1), b);
}
/// @dev Returns the unsigned integer result of multiplying a fixed-point
/// number with an integer, reverting if the multiplication overflows.
/// Negative results are clamped to zero.
function uintMul(int256 a, int256 b) internal pure returns (uint256) {
int256 c = _mul(a, b);
if (c <= 0) {
return 0;
}
return uint256(c) >> 127;
}
/// @dev Returns the absolute value of a fixed point number.
function abs(int256 a) internal pure returns (int256 c) {
if (a >= 0) {