From 2721252d6a82e83801c650ebad6a2cb4d7195bc1 Mon Sep 17 00:00:00 2001
From: Fabio Berger <me@fabioberger.com>
Date: Fri, 19 Jan 2018 23:13:31 +0800
Subject: 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

---
 packages/contracts/contracts_old/SafeMath/v1.sol | 73 ++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 packages/contracts/contracts_old/SafeMath/v1.sol

(limited to 'packages/contracts/contracts_old/SafeMath')

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;
+    }
+}
-- 
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