1 files changed, 115 insertions, 0 deletions
diff --git a/vm/common.go b/vm/common.go
new file mode 100644
index 000000000..af458e599
--- /dev/null
+++ b/vm/common.go
@@ -0,0 +1,115 @@
+package vm
+
+import (
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/ethereum/go-ethereum/logger"
+)
+
+var vmlogger = logger.NewLogger("VM")
+
+type Type byte
+
+const (
+	StdVmTy Type = iota
+	JitVmTy
+
+	MaxVmTy
+)
+
+func NewVm(env Environment) VirtualMachine {
+	switch env.VmType() {
+	case JitVmTy:
+		return NewJitVm(env)
+	default:
+		vmlogger.Infoln("unsupported vm type %d", env.VmType())
+		fallthrough
+	case StdVmTy:
+		return New(env)
+	}
+}
+
+var (
+	GasQuickStep   = big.NewInt(2)
+	GasFastestStep = big.NewInt(3)
+	GasFastStep    = big.NewInt(5)
+	GasMidStep     = big.NewInt(8)
+	GasSlowStep    = big.NewInt(10)
+	GasExtStep     = big.NewInt(20)
+
+	GasStorageGet        = big.NewInt(50)
+	GasStorageAdd        = big.NewInt(20000)
+	GasStorageMod        = big.NewInt(5000)
+	GasLogBase           = big.NewInt(375)
+	GasLogTopic          = big.NewInt(375)
+	GasLogByte           = big.NewInt(8)
+	GasCreate            = big.NewInt(32000)
+	GasCreateByte        = big.NewInt(300)
+	GasCall              = big.NewInt(40)
+	GasCallValueTransfer = big.NewInt(9000)
+	GasStipend           = big.NewInt(2300)
+	GasCallNewAccount    = big.NewInt(25000)
+	GasReturn            = big.NewInt(0)
+	GasStop              = big.NewInt(0)
+	GasJumpDest          = big.NewInt(1)
+
+	RefundStorage = big.NewInt(15000)
+	RefundSuicide = big.NewInt(24000)
+
+	GasMemWord           = big.NewInt(3)
+	GasQuadCoeffDenom    = big.NewInt(512)
+	GasContractByte      = big.NewInt(200)
+	GasTransaction       = big.NewInt(21000)
+	GasTxDataNonzeroByte = big.NewInt(37)
+	GasTxZeroByte        = big.NewInt(2)
+	GasExp               = big.NewInt(10)
+	GasExpByte           = big.NewInt(10)
+
+	GasSha3Base     = big.NewInt(30)
+	GasSha3Word     = big.NewInt(6)
+	GasSha256Base   = big.NewInt(60)
+	GasSha256Word   = big.NewInt(12)
+	GasRipemdBase   = big.NewInt(600)
+	GasRipemdWord   = big.NewInt(12)
+	GasEcrecover    = big.NewInt(3000)
+	GasIdentityBase = big.NewInt(15)
+	GasIdentityWord = big.NewInt(3)
+	GasCopyWord     = big.NewInt(3)
+
+	Pow256 = ethutil.BigPow(2, 256)
+
+	LogTyPretty byte = 0x1
+	LogTyDiff   byte = 0x2
+
+	U256 = ethutil.U256
+	S256 = ethutil.S256
+
+	Zero = ethutil.Big0
+)
+
+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
+}