Official Go implementation of the Ethereum protocol
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go-ethereum/vm/common.go

67 lines
1.2 KiB

package vm
import (
"math/big"
"github.com/ethereum/go-ethereum/ethlog"
"github.com/ethereum/go-ethereum/ethutil"
)
var vmlogger = ethlog.NewLogger("VM")
type Type int
const (
StandardVmTy Type = iota
DebugVmTy
MaxVmTy
)
var (
GasStep = big.NewInt(1)
GasSha = big.NewInt(20)
GasSLoad = big.NewInt(20)
GasSStore = big.NewInt(100)
GasBalance = big.NewInt(20)
GasCreate = big.NewInt(100)
GasCall = big.NewInt(20)
GasMemory = big.NewInt(1)
GasData = big.NewInt(5)
GasTx = big.NewInt(500)
GasLog = big.NewInt(32)
Pow256 = ethutil.BigPow(2, 256)
LogTyPretty byte = 0x1
LogTyDiff byte = 0x2
U256 = ethutil.U256
S256 = ethutil.S256
)
const MaxCallDepth = 1025
func calcMemSize(off, l *big.Int) *big.Int {
if l.Cmp(ethutil.Big0) == 0 {
return ethutil.Big0
}
return new(big.Int).Add(off, l)
}
// Simple helper
func u256(n int64) *big.Int {
return big.NewInt(n)
}
// Mainly used for print variables and passing to Print*
func toValue(val *big.Int) interface{} {
// Let's assume a string on right padded zero's
b := val.Bytes()
if b[0] != 0 && b[len(b)-1] == 0x0 && b[len(b)-2] == 0x0 {
return string(b)
}
return val
}