SafeMath.sol

Git Source

Author: https://github.com/AragonBlack/fundraising/blob/master/apps/bancor-formula/contracts/utility/SafeMath.sol

The sole modification implemented in the contract involves altering the Solidity version number.

Functions

add

returns the sum of _x and _y, reverts if the calculation overflows

function add(uint _x, uint _y) internal pure returns (uint);

Parameters

Name	Type	Description
_x	uint256	value 1
_y	uint256	value 2

Returns

Name	Type	Description
<none>	uint256	sum

sub

returns the difference of _x minus _y, reverts if the calculation underflows

function sub(uint _x, uint _y) internal pure returns (uint);

Parameters

Name	Type	Description
_x	uint256	minuend
_y	uint256	subtrahend

Returns

Name	Type	Description
<none>	uint256	difference

mul

returns the product of multiplying _x by _y, reverts if the calculation overflows

function mul(uint _x, uint _y) internal pure returns (uint);

Parameters

Name	Type	Description
_x	uint256	factor 1
_y	uint256	factor 2

Returns

Name	Type	Description
<none>	uint256	product

div

Integer division of two numbers truncating the quotient, reverts on division by zero.

function div(uint _x, uint _y) internal pure returns (uint);

Parameters

Name	Type	Description
_x	uint256	dividend
_y	uint256	divisor

Returns

Name	Type	Description
<none>	uint256	quotient