forked from cerc-io/plugeth
Refactored CALLDATALOAD to use big int
* Added BigMin
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@ -503,13 +503,17 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
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vm.Printf(" => %v", vm.vars.Value)
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case CALLDATALOAD:
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require(1)
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offset := stack.Pop().Int64()
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var (
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offset = stack.Pop()
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data = make([]byte, 32)
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lenData = big.NewInt(int64(len(closure.Args)))
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)
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data := make([]byte, 32)
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if big.NewInt(int64(len(closure.Args))).Cmp(big.NewInt(offset)) >= 0 {
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l := int64(math.Min(float64(offset+32), float64(len(closure.Args))))
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if lenData.Cmp(offset) >= 0 {
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length := new(big.Int).Add(offset, ethutil.Big32)
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length = ethutil.BigMin(length, lenData)
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copy(data, closure.Args[offset:l])
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copy(data, closure.Args[offset.Int64():length.Int64()])
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}
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vm.Printf(" => 0x%x", data)
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@ -4,14 +4,6 @@ import (
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"math/big"
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)
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var BigInt0 *big.Int = big.NewInt(0)
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// True
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var BigTrue *big.Int = big.NewInt(1)
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// False
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var BigFalse *big.Int = big.NewInt(0)
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// Big pow
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//
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// Returns the power of two big integers
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@ -73,3 +65,14 @@ func BigMax(x, y *big.Int) *big.Int {
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return x
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}
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// Big min
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//
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// Returns the minimum size big integer
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func BigMin(x, y *big.Int) *big.Int {
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if x.Cmp(y) >= 0 {
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return y
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}
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return x
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}
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@ -58,9 +58,11 @@ func CurrencyToString(num *big.Int) string {
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// Common big integers often used
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var (
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Big1 = big.NewInt(1)
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Big2 = big.NewInt(2)
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Big0 = big.NewInt(0)
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Big32 = big.NewInt(32)
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Big256 = big.NewInt(0xff)
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Big1 = big.NewInt(1)
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Big2 = big.NewInt(2)
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Big0 = big.NewInt(0)
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BigTrue = Big1
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BigFalse = Big0
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Big32 = big.NewInt(32)
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Big256 = big.NewInt(0xff)
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)
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