Correct memory concatenation final allocation

GNSPS · GNSPS · commit 8e0e6d4a192d · 2018-01-08T05:43:16.000Z
Fixes #7
diff --git a/contracts/BytesLib.sol b/contracts/BytesLib.sol
@@ -42,7 +42,7 @@ library BytesLib {
             //allocating the array padded to 32 bytes like the compiler does now
             //make an additional check for a resulting zero-length array:
             //  if (sub - end == 0) then end = end + 1
-            mstore(0x40, and(add(add(end, iszero(sub(mc, end))), 31), not(31)))
+            mstore(0x40, and(add(add(end, iszero(add(length, mload(_preBytes)))), 31), not(31)))
         }
         
         return tempBytes;

Original file line number	Diff line number	Diff line change
`@@ -42,7 +42,7 @@ library BytesLib {`
`42`	`42`	`//allocating the array padded to 32 bytes like the compiler does now`
`43`	`43`	`//make an additional check for a resulting zero-length array:`
`44`	`44`	`// if (sub - end == 0) then end = end + 1`
`45`		`- mstore(0x40, and(add(add(end, iszero(sub(mc, end))), 31), not(31)))`
	`45`	`+ mstore(0x40, and(add(add(end, iszero(add(length, mload(_preBytes)))), 31), not(31)))`
`46`	`46`	`}`
`47`	`47`
`48`	`48`	`return tempBytes;`