package ethutil
import (
"math/big"
"strconv"
)
// Op codes
var OpCodes = map[string]byte{
"STOP": 0x00,
"ADD": 0x01,
"MUL": 0x02,
"SUB": 0x03,
"DIV": 0x04,
"SDIV": 0x05,
"MOD": 0x06,
"SMOD": 0x07,
"EXP": 0x08,
"NEG": 0x09,
"LT": 0x0a,
"LE": 0x0b,
"GT": 0x0c,
"GE": 0x0d,
"EQ": 0x0e,
"NOT": 0x0f,
"MYADDRESS": 0x10,
"TXSENDER": 0x11,
"TXVALUE": 0x12,
"TXDATAN": 0x13,
"TXDATA": 0x14,
"BLK_PREVHASH": 0x15,
"BLK_COINBASE": 0x16,
"BLK_TIMESTAMP": 0x17,
"BLK_NUMBER": 0x18,
"BLK_DIFFICULTY": 0x19,
"BLK_NONCE": 0x1a,
"BASEFEE": 0x1b,
"SHA256": 0x20,
"RIPEMD160": 0x21,
"ECMUL": 0x22,
"ECADD": 0x23,
"ECSIGN": 0x24,
"ECRECOVER": 0x25,
"ECVALID": 0x26,
"SHA3": 0x27,
"PUSH": 0x30,
"POP": 0x31,
"DUP": 0x32,
"SWAP": 0x33,
"MLOAD": 0x34,
"MSTORE": 0x35,
"SLOAD": 0x36,
"SSTORE": 0x37,
"JMP": 0x38,
"JMPI": 0x39,
"IND": 0x3a,
"EXTRO": 0x3b,
"BALANCE": 0x3c,
"MKTX": 0x3d,
"SUICIDE": 0x3f,
}
func IsOpCode(s string) bool {
for key, _ := range OpCodes {
if key == s {
return true
}
}
return false
}
func CompileInstr(s string) ([]byte, error) {
isOp := IsOpCode(s)
if isOp {
return []byte{OpCodes[s]}, nil
}
num := new(big.Int)
num.SetString(s, 0)
return num.Bytes(), nil
}
func Instr(instr string) (int, []string, error) {
base := new(big.Int)
base.SetString(instr, 0)
args := make([]string, 7)
for i := 0; i < 7; i++ {
// int(int(val) / int(math.Pow(256,float64(i)))) % 256
exp := BigPow(256, i)
num := new(big.Int)
num.Div(base, exp)
args[i] = num.Mod(num, big.NewInt(256)).String()
}
op, _ := strconv.Atoi(args[0])
return op, args[1:7], nil
}
