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author | Fabio Berger <me@fabioberger.com> | 2018-01-19 23:13:31 +0800 |
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committer | Amir Bandeali <abandeali1@gmail.com> | 2018-02-03 01:39:08 +0800 |
commit | 2721252d6a82e83801c650ebad6a2cb4d7195bc1 (patch) | |
tree | c22be8b830f57e8984be92d6936f5fefc9c44c2d /packages/contracts/contracts_old/SafeMath/v1.sol | |
parent | 47d74aa24ac06de33ae331f3589e9c8013c655ec (diff) | |
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Get rid of suffixed contract versioning and replace it with a poor-mans package manager. Versions are stored locally, and are generated in a copy-on-write basis as required
Diffstat (limited to 'packages/contracts/contracts_old/SafeMath/v1.sol')
-rw-r--r-- | packages/contracts/contracts_old/SafeMath/v1.sol | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/packages/contracts/contracts_old/SafeMath/v1.sol b/packages/contracts/contracts_old/SafeMath/v1.sol new file mode 100644 index 000000000..e35c0dc81 --- /dev/null +++ b/packages/contracts/contracts_old/SafeMath/v1.sol @@ -0,0 +1,73 @@ +pragma solidity ^0.4.11; + +contract SafeMath { + function safeMul(uint a, uint b) + internal + constant + returns (uint256) + { + uint c = a * b; + assert(a == 0 || c / a == b); + return c; + } + + function safeDiv(uint a, uint b) + internal + constant + returns (uint256) + { + uint c = a / b; + return c; + } + + function safeSub(uint a, uint b) + internal + constant + returns (uint256) + { + assert(b <= a); + return a - b; + } + + function safeAdd(uint a, uint b) + internal + constant + returns (uint256) + { + 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; + } +} |