Merge pull request #150 from fjl/develop

Merge eth-go repo into go-ethereum

1 files changed, 66 insertions, 0 deletions

diff --git a/vm/common.go b/vm/common.go
new file mode 100644
index 000000000..3b0d735ba
--- /dev/null
+++ b/vm/common.go
@@ -0,0 +1,66 @@
+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)
+
+	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
+}