1 files changed, 167 insertions, 0 deletions
diff --git a/ethchain/stack.go b/ethchain/stack.go
new file mode 100644
index 000000000..c80d01e5c
--- /dev/null
+++ b/ethchain/stack.go
@@ -0,0 +1,167 @@
+package ethchain
+
+import (
+	"fmt"
+	"math/big"
+)
+
+type OpCode int
+
+// Op codes
+const (
+	oSTOP OpCode = iota
+	oADD
+	oMUL
+	oSUB
+	oDIV
+	oSDIV
+	oMOD
+	oSMOD
+	oEXP
+	oNEG
+	oLT
+	oLE
+	oGT
+	oGE
+	oEQ
+	oNOT
+	oMYADDRESS
+	oTXSENDER
+	oTXVALUE
+	oTXFEE
+	oTXDATAN
+	oTXDATA
+	oBLK_PREVHASH
+	oBLK_COINBASE
+	oBLK_TIMESTAMP
+	oBLK_NUMBER
+	oBLK_DIFFICULTY
+	oBASEFEE
+	oSHA256    OpCode = 32
+	oRIPEMD160 OpCode = 33
+	oECMUL     OpCode = 34
+	oECADD     OpCode = 35
+	oECSIGN    OpCode = 36
+	oECRECOVER OpCode = 37
+	oECVALID   OpCode = 38
+	oSHA3      OpCode = 39
+	oPUSH      OpCode = 48
+	oPOP       OpCode = 49
+	oDUP       OpCode = 50
+	oSWAP      OpCode = 51
+	oMLOAD     OpCode = 52
+	oMSTORE    OpCode = 53
+	oSLOAD     OpCode = 54
+	oSSTORE    OpCode = 55
+	oJMP       OpCode = 56
+	oJMPI      OpCode = 57
+	oIND       OpCode = 58
+	oEXTRO     OpCode = 59
+	oBALANCE   OpCode = 60
+	oMKTX      OpCode = 61
+	oSUICIDE   OpCode = 62
+)
+
+// Since the opcodes aren't all in order we can't use a regular slice
+var opCodeToString = map[OpCode]string{
+	oSTOP:           "STOP",
+	oADD:            "ADD",
+	oMUL:            "MUL",
+	oSUB:            "SUB",
+	oDIV:            "DIV",
+	oSDIV:           "SDIV",
+	oMOD:            "MOD",
+	oSMOD:           "SMOD",
+	oEXP:            "EXP",
+	oNEG:            "NEG",
+	oLT:             "LT",
+	oLE:             "LE",
+	oGT:             "GT",
+	oGE:             "GE",
+	oEQ:             "EQ",
+	oNOT:            "NOT",
+	oMYADDRESS:      "MYADDRESS",
+	oTXSENDER:       "TXSENDER",
+	oTXVALUE:        "TXVALUE",
+	oTXFEE:          "TXFEE",
+	oTXDATAN:        "TXDATAN",
+	oTXDATA:         "TXDATA",
+	oBLK_PREVHASH:   "BLK_PREVHASH",
+	oBLK_COINBASE:   "BLK_COINBASE",
+	oBLK_TIMESTAMP:  "BLK_TIMESTAMP",
+	oBLK_NUMBER:     "BLK_NUMBER",
+	oBLK_DIFFICULTY: "BLK_DIFFICULTY",
+	oBASEFEE:        "BASEFEE",
+	oSHA256:         "SHA256",
+	oRIPEMD160:      "RIPEMD160",
+	oECMUL:          "ECMUL",
+	oECADD:          "ECADD",
+	oECSIGN:         "ECSIGN",
+	oECRECOVER:      "ECRECOVER",
+	oECVALID:        "ECVALID",
+	oSHA3:           "SHA3",
+	oPUSH:           "PUSH",
+	oPOP:            "POP",
+	oDUP:            "DUP",
+	oSWAP:           "SWAP",
+	oMLOAD:          "MLOAD",
+	oMSTORE:         "MSTORE",
+	oSLOAD:          "SLOAD",
+	oSSTORE:         "SSTORE",
+	oJMP:            "JMP",
+	oJMPI:           "JMPI",
+	oIND:            "IND",
+	oEXTRO:          "EXTRO",
+	oBALANCE:        "BALANCE",
+	oMKTX:           "MKTX",
+	oSUICIDE:        "SUICIDE",
+}
+
+func (o OpCode) String() string {
+	return opCodeToString[o]
+}
+
+type OpType int
+
+const (
+	tNorm = iota
+	tData
+	tExtro
+	tCrypto
+)
+
+type TxCallback func(opType OpType) bool
+
+// Simple push/pop stack mechanism
+type Stack struct {
+	data []*big.Int
+}
+
+func NewStack() *Stack {
+	return &Stack{}
+}
+
+func (st *Stack) Pop() *big.Int {
+	s := len(st.data)
+
+	str := st.data[s-1]
+	st.data = st.data[:s-1]
+
+	return str
+}
+
+func (st *Stack) Popn() (*big.Int, *big.Int) {
+	s := len(st.data)
+
+	ints := st.data[s-2:]
+	st.data = st.data[:s-2]
+
+	return ints[0], ints[1]
+}
+
+func (st *Stack) Push(d *big.Int) {
+	st.data = append(st.data, d)
+}
+func (st *Stack) Print() {
+	fmt.Println(st.data)
+}