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April 12, 2018 07:34
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[ N1X ] !# safe <= sm.sol
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pragma solidity ^0.4.8; | |
/** | |
* Math operations used by ConsenSys, with safety // sanity checks incorporated! | |
* Proformed by itsN1X@n1x.site, with ++ <3 . | |
*/ | |
library SafeMath { | |
function mul(uint a, uint b) internal returns (uint) { | |
uint c = a * b; | |
assert(a == 0 || c / a == b); | |
return c; | |
} | |
function div(uint a, uint b) internal returns (uint) { | |
// assert(b > 0); // Solidity automatically throws when dividing by 0 | |
uint c = a / b; | |
// assert(a == b * c + a % b); // There is no case in which this doesn't hold | |
return c; | |
} | |
function sub(uint a, uint b) internal returns (uint) { | |
assert(b <= a); | |
return a - b; | |
} | |
function add(uint a, uint b) internal returns (uint) { | |
uint c = a + b; | |
assert(c >= a); | |
return c; | |
} | |
function max64(uint64 a, uint64 b) internal constant returns (uint64) { | |
return a >= b ? a : b; | |
} | |
function min64(uint64 a, uint64 b) internal constant returns (uint64) { | |
return a < b ? a : b; | |
} | |
function max256(uint256 a, uint256 b) internal constant returns (uint256) { | |
return a >= b ? a : b; | |
} | |
function min256(uint256 a, uint256 b) internal constant returns (uint256) { | |
return a < b ? a : b; | |
} | |
function assert(bool assertion) internal { | |
if (!assertion) { | |
throw; | |
} | |
} | |
} |
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