Refactored state, state object and vm

* The State and StateObject have been moved to their own package
* The VM is moved to it's own package

1 files changed, 346 insertions, 0 deletions

diff --git a/ethvm/types.go b/ethvm/types.go
new file mode 100644
index 000000000..1c3f66139
--- /dev/null
+++ b/ethvm/types.go
@@ -0,0 +1,346 @@
+package ethvm
+
+import (
+	"fmt"
+)
+
+type OpCode int
+
+// Op codes
+const (
+	// 0x0 range - arithmetic ops
+	STOP = 0x00
+	ADD  = 0x01
+	MUL  = 0x02
+	SUB  = 0x03
+	DIV  = 0x04
+	SDIV = 0x05
+	MOD  = 0x06
+	SMOD = 0x07
+	EXP  = 0x08
+	NEG  = 0x09
+	LT   = 0x0a
+	GT   = 0x0b
+	SLT  = 0x0c
+	SGT  = 0x0d
+	EQ   = 0x0e
+	NOT  = 0x0f
+
+	// 0x10 range - bit ops
+	AND  = 0x10
+	OR   = 0x11
+	XOR  = 0x12
+	BYTE = 0x13
+
+	// 0x20 range - crypto
+	SHA3 = 0x20
+
+	// 0x30 range - closure state
+	ADDRESS      = 0x30
+	BALANCE      = 0x31
+	ORIGIN       = 0x32
+	CALLER       = 0x33
+	CALLVALUE    = 0x34
+	CALLDATALOAD = 0x35
+	CALLDATASIZE = 0x36
+	CALLDATACOPY = 0x37
+	CODESIZE     = 0x38
+	CODECOPY     = 0x39
+	GASPRICE     = 0x3a
+
+	// 0x40 range - block operations
+	PREVHASH   = 0x40
+	COINBASE   = 0x41
+	TIMESTAMP  = 0x42
+	NUMBER     = 0x43
+	DIFFICULTY = 0x44
+	GASLIMIT   = 0x45
+
+	// 0x50 range - 'storage' and execution
+	POP     = 0x50
+	DUP     = 0x51
+	SWAP    = 0x52
+	MLOAD   = 0x53
+	MSTORE  = 0x54
+	MSTORE8 = 0x55
+	SLOAD   = 0x56
+	SSTORE  = 0x57
+	JUMP    = 0x58
+	JUMPI   = 0x59
+	PC      = 0x5a
+	MSIZE   = 0x5b
+	GAS     = 0x5c
+
+	// 0x60 range
+	PUSH1  = 0x60
+	PUSH2  = 0x61
+	PUSH3  = 0x62
+	PUSH4  = 0x63
+	PUSH5  = 0x64
+	PUSH6  = 0x65
+	PUSH7  = 0x66
+	PUSH8  = 0x67
+	PUSH9  = 0x68
+	PUSH10 = 0x69
+	PUSH11 = 0x6a
+	PUSH12 = 0x6b
+	PUSH13 = 0x6c
+	PUSH14 = 0x6d
+	PUSH15 = 0x6e
+	PUSH16 = 0x6f
+	PUSH17 = 0x70
+	PUSH18 = 0x71
+	PUSH19 = 0x72
+	PUSH20 = 0x73
+	PUSH21 = 0x74
+	PUSH22 = 0x75
+	PUSH23 = 0x76
+	PUSH24 = 0x77
+	PUSH25 = 0x78
+	PUSH26 = 0x79
+	PUSH27 = 0x7a
+	PUSH28 = 0x7b
+	PUSH29 = 0x7c
+	PUSH30 = 0x7d
+	PUSH31 = 0x7e
+	PUSH32 = 0x7f
+
+	// 0xf0 range - closures
+	CREATE = 0xf0
+	CALL   = 0xf1
+	RETURN = 0xf2
+
+	// 0x70 range - other
+	LOG     = 0xfe // XXX Unofficial
+	SUICIDE = 0xff
+)
+
+// Since the opcodes aren't all in order we can't use a regular slice
+var opCodeToString = map[OpCode]string{
+	// 0x0 range - arithmetic ops
+	STOP: "STOP",
+	ADD:  "ADD",
+	MUL:  "MUL",
+	SUB:  "SUB",
+	DIV:  "DIV",
+	SDIV: "SDIV",
+	MOD:  "MOD",
+	SMOD: "SMOD",
+	EXP:  "EXP",
+	NEG:  "NEG",
+	LT:   "LT",
+	GT:   "GT",
+	SLT:  "SLT",
+	SGT:  "SGT",
+	EQ:   "EQ",
+	NOT:  "NOT",
+
+	// 0x10 range - bit ops
+	AND:  "AND",
+	OR:   "OR",
+	XOR:  "XOR",
+	BYTE: "BYTE",
+
+	// 0x20 range - crypto
+	SHA3: "SHA3",
+
+	// 0x30 range - closure state
+	ADDRESS:      "ADDRESS",
+	BALANCE:      "BALANCE",
+	ORIGIN:       "ORIGIN",
+	CALLER:       "CALLER",
+	CALLVALUE:    "CALLVALUE",
+	CALLDATALOAD: "CALLDATALOAD",
+	CALLDATASIZE: "CALLDATASIZE",
+	CALLDATACOPY: "CALLDATACOPY",
+	CODESIZE:     "CODESIZE",
+	CODECOPY:     "CODECOPY",
+	GASPRICE:     "TXGASPRICE",
+
+	// 0x40 range - block operations
+	PREVHASH:   "PREVHASH",
+	COINBASE:   "COINBASE",
+	TIMESTAMP:  "TIMESTAMP",
+	NUMBER:     "NUMBER",
+	DIFFICULTY: "DIFFICULTY",
+	GASLIMIT:   "GASLIMIT",
+
+	// 0x50 range - 'storage' and execution
+	POP:     "POP",
+	DUP:     "DUP",
+	SWAP:    "SWAP",
+	MLOAD:   "MLOAD",
+	MSTORE:  "MSTORE",
+	MSTORE8: "MSTORE8",
+	SLOAD:   "SLOAD",
+	SSTORE:  "SSTORE",
+	JUMP:    "JUMP",
+	JUMPI:   "JUMPI",
+	PC:      "PC",
+	MSIZE:   "MSIZE",
+	GAS:     "GAS",
+
+	// 0x60 range - push
+	PUSH1:  "PUSH1",
+	PUSH2:  "PUSH2",
+	PUSH3:  "PUSH3",
+	PUSH4:  "PUSH4",
+	PUSH5:  "PUSH5",
+	PUSH6:  "PUSH6",
+	PUSH7:  "PUSH7",
+	PUSH8:  "PUSH8",
+	PUSH9:  "PUSH9",
+	PUSH10: "PUSH10",
+	PUSH11: "PUSH11",
+	PUSH12: "PUSH12",
+	PUSH13: "PUSH13",
+	PUSH14: "PUSH14",
+	PUSH15: "PUSH15",
+	PUSH16: "PUSH16",
+	PUSH17: "PUSH17",
+	PUSH18: "PUSH18",
+	PUSH19: "PUSH19",
+	PUSH20: "PUSH20",
+	PUSH21: "PUSH21",
+	PUSH22: "PUSH22",
+	PUSH23: "PUSH23",
+	PUSH24: "PUSH24",
+	PUSH25: "PUSH25",
+	PUSH26: "PUSH26",
+	PUSH27: "PUSH27",
+	PUSH28: "PUSH28",
+	PUSH29: "PUSH29",
+	PUSH30: "PUSH30",
+	PUSH31: "PUSH31",
+	PUSH32: "PUSH32",
+
+	// 0xf0 range
+	CREATE: "CREATE",
+	CALL:   "CALL",
+	RETURN: "RETURN",
+
+	// 0x70 range - other
+	LOG:     "LOG",
+	SUICIDE: "SUICIDE",
+}
+
+func (o OpCode) String() string {
+	str := opCodeToString[o]
+	if len(str) == 0 {
+		return fmt.Sprintf("Missing opcode 0x%x", int(o))
+	}
+
+	return str
+}
+
+// Op codes for assembling
+var OpCodes = map[string]byte{
+	// 0x0 range - arithmetic ops
+	"STOP": 0x00,
+	"ADD":  0x01,
+	"MUL":  0x02,
+	"SUB":  0x03,
+	"DIV":  0x04,
+	"SDIV": 0x05,
+	"MOD":  0x06,
+	"SMOD": 0x07,
+	"EXP":  0x08,
+	"NEG":  0x09,
+	"LT":   0x0a,
+	"GT":   0x0b,
+	"EQ":   0x0c,
+	"NOT":  0x0d,
+
+	// 0x10 range - bit ops
+	"AND":  0x10,
+	"OR":   0x11,
+	"XOR":  0x12,
+	"BYTE": 0x13,
+
+	// 0x20 range - crypto
+	"SHA3": 0x20,
+
+	// 0x30 range - closure state
+	"ADDRESS":      0x30,
+	"BALANCE":      0x31,
+	"ORIGIN":       0x32,
+	"CALLER":       0x33,
+	"CALLVALUE":    0x34,
+	"CALLDATALOAD": 0x35,
+	"CALLDATASIZE": 0x36,
+	"GASPRICE":     0x38,
+
+	// 0x40 range - block operations
+	"PREVHASH":   0x40,
+	"COINBASE":   0x41,
+	"TIMESTAMP":  0x42,
+	"NUMBER":     0x43,
+	"DIFFICULTY": 0x44,
+	"GASLIMIT":   0x45,
+
+	// 0x50 range - 'storage' and execution
+	"POP":     0x51,
+	"DUP":     0x52,
+	"SWAP":    0x53,
+	"MLOAD":   0x54,
+	"MSTORE":  0x55,
+	"MSTORE8": 0x56,
+	"SLOAD":   0x57,
+	"SSTORE":  0x58,
+	"JUMP":    0x59,
+	"JUMPI":   0x5a,
+	"PC":      0x5b,
+	"MSIZE":   0x5c,
+
+	// 0x70 range - 'push'
+	"PUSH1":  0x60,
+	"PUSH2":  0x61,
+	"PUSH3":  0x62,
+	"PUSH4":  0x63,
+	"PUSH5":  0x64,
+	"PUSH6":  0x65,
+	"PUSH7":  0x66,
+	"PUSH8":  0x67,
+	"PUSH9":  0x68,
+	"PUSH10": 0x69,
+	"PUSH11": 0x6a,
+	"PUSH12": 0x6b,
+	"PUSH13": 0x6c,
+	"PUSH14": 0x6d,
+	"PUSH15": 0x6e,
+	"PUSH16": 0x6f,
+	"PUSH17": 0x70,
+	"PUSH18": 0x71,
+	"PUSH19": 0x72,
+	"PUSH20": 0x73,
+	"PUSH21": 0x74,
+	"PUSH22": 0x75,
+	"PUSH23": 0x76,
+	"PUSH24": 0x77,
+	"PUSH25": 0x78,
+	"PUSH26": 0x70,
+	"PUSH27": 0x7a,
+	"PUSH28": 0x7b,
+	"PUSH29": 0x7c,
+	"PUSH30": 0x7d,
+	"PUSH31": 0x7e,
+	"PUSH32": 0x7f,
+
+	// 0xf0 range - closures
+	"CREATE": 0xf0,
+	"CALL":   0xf1,
+	"RETURN": 0xf2,
+
+	// 0x70 range - other
+	"LOG":     0xfe,
+	"SUICIDE": 0x7f,
+}
+
+func IsOpCode(s string) bool {
+	for key, _ := range OpCodes {
+		if key == s {
+			return true
+		}
+	}
+	return false
+}