89 lines
1.7 KiB
Go
89 lines
1.7 KiB
Go
package vm
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import (
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"math/big"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/logger"
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)
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var vmlogger = logger.NewLogger("VM")
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type Type byte
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const (
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StdVmTy Type = iota
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JitVmTy
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MaxVmTy
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)
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func NewVm(env Environment) VirtualMachine {
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switch env.VmType() {
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case JitVmTy:
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return NewJitVm(env)
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default:
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vmlogger.Infoln("unsupported vm type %d", env.VmType())
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fallthrough
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case StdVmTy:
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return New(env)
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}
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}
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var (
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GasStep = big.NewInt(1)
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GasSha = big.NewInt(10)
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GasSLoad = big.NewInt(20)
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GasSStore = big.NewInt(100)
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GasSStoreRefund = big.NewInt(100)
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GasBalance = big.NewInt(20)
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GasCreate = big.NewInt(100)
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GasCall = big.NewInt(20)
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GasCreateByte = big.NewInt(5)
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GasSha3Byte = big.NewInt(10)
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GasSha256Byte = big.NewInt(50)
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GasRipemdByte = big.NewInt(50)
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GasMemory = big.NewInt(1)
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GasData = big.NewInt(5)
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GasTx = big.NewInt(500)
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GasLog = big.NewInt(32)
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GasSha256 = big.NewInt(50)
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GasRipemd = big.NewInt(50)
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GasEcrecover = big.NewInt(500)
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GasMemCpy = big.NewInt(1)
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Pow256 = ethutil.BigPow(2, 256)
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LogTyPretty byte = 0x1
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LogTyDiff byte = 0x2
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U256 = ethutil.U256
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S256 = ethutil.S256
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)
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const MaxCallDepth = 1025
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func calcMemSize(off, l *big.Int) *big.Int {
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if l.Cmp(ethutil.Big0) == 0 {
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return ethutil.Big0
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}
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return new(big.Int).Add(off, l)
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}
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// Simple helper
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func u256(n int64) *big.Int {
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return big.NewInt(n)
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}
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// Mainly used for print variables and passing to Print*
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func toValue(val *big.Int) interface{} {
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// Let's assume a string on right padded zero's
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b := val.Bytes()
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if b[0] != 0 && b[len(b)-1] == 0x0 && b[len(b)-2] == 0x0 {
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return string(b)
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}
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return val
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}
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