diff options
Diffstat (limited to 'core/vm/common.go')
| -rw-r--r-- | core/vm/common.go | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/core/vm/common.go b/core/vm/common.go index b7b9a6a9c..ef40c4a95 100644 --- a/core/vm/common.go +++ b/core/vm/common.go @@ -17,15 +17,10 @@ package vm import ( - "math" "math/big" "github.com/ethereum/go-ethereum/common" -) - -var ( - U256 = common.U256 // Shortcut to common.U256 - S256 = common.S256 // Shortcut to common.S256 + "github.com/ethereum/go-ethereum/common/math" ) // calculates the memory size required for a step @@ -42,8 +37,8 @@ func calcMemSize(off, l *big.Int) *big.Int { func getData(data []byte, start, size *big.Int) []byte { dlen := big.NewInt(int64(len(data))) - s := common.BigMin(start, dlen) - e := common.BigMin(new(big.Int).Add(s, size), dlen) + s := math.BigMin(start, dlen) + e := math.BigMin(new(big.Int).Add(s, size), dlen) return common.RightPadBytes(data[s.Uint64():e.Uint64()], int(size.Uint64())) } @@ -61,3 +56,12 @@ func toWordSize(size uint64) uint64 { return (size + 31) / 32 } + +func allZero(b []byte) bool { + for _, byte := range b { + if byte != 0 { + return false + } + } + return true +} |