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| author | obscuren <geffobscura@gmail.com> | 2014-07-22 02:38:43 +0800 |
|---|---|---|
| committer | obscuren <geffobscura@gmail.com> | 2014-07-22 02:38:43 +0800 |
| commit | 20ee1ae65e57ef7d60404277162c84c572c6bb10 (patch) | |
| tree | dbb43cc384068a98650b035d9f8a157e9de263f9 /ethchain | |
| parent | eab0b2a90a3e33d0be4d09cbb99d193ba2219844 (diff) | |
| download | dexon-20ee1ae65e57ef7d60404277162c84c572c6bb10.tar.gz dexon-20ee1ae65e57ef7d60404277162c84c572c6bb10.tar.zst dexon-20ee1ae65e57ef7d60404277162c84c572c6bb10.zip | |
Refactored CALLDATALOAD to use big int
* Added BigMin
Diffstat (limited to 'ethchain')
| -rw-r--r-- | ethchain/vm.go | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/ethchain/vm.go b/ethchain/vm.go index 34ecd95b7..a9bed1eca 100644 --- a/ethchain/vm.go +++ b/ethchain/vm.go @@ -503,13 +503,17 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) { vm.Printf(" => %v", vm.vars.Value) case CALLDATALOAD: require(1) - offset := stack.Pop().Int64() + var ( + offset = stack.Pop() + data = make([]byte, 32) + lenData = big.NewInt(int64(len(closure.Args))) + ) - data := make([]byte, 32) - if big.NewInt(int64(len(closure.Args))).Cmp(big.NewInt(offset)) >= 0 { - l := int64(math.Min(float64(offset+32), float64(len(closure.Args)))) + if lenData.Cmp(offset) >= 0 { + length := new(big.Int).Add(offset, ethutil.Big32) + length = ethutil.BigMin(length, lenData) - copy(data, closure.Args[offset:l]) + copy(data, closure.Args[offset.Int64():length.Int64()]) } vm.Printf(" => 0x%x", data) |