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package main
import (
"fmt"
"strings"
"errors"
"math/big"
"strconv"
)
// Op codes
var OpCodes = map[string]string{
"STOP": "0",
"ADD": "16", // 0x10
"SUB": "17", // 0x11
"MUL": "18", // 0x12
"DIV": "19", // 0x13
"SDIV": "20", // 0x14
"MOD": "21", // 0x15
"SMOD": "22", // 0x16
"EXP": "23", // 0x17
"NEG": "24", // 0x18
"LT": "32", // 0x20
"LE": "33", // 0x21
"GT": "34", // 0x22
"GE": "35", // 0x23
"EQ": "36", // 0x24
"NOT": "37", // 0x25
"SHA256": "48", // 0x30
"RIPEMD160": "49", // 0x31
"ECMUL": "50", // 0x32
"ECADD": "51", // 0x33
"SIGN": "52", // 0x34
"RECOVER": "53", // 0x35
"COPY": "64", // 0x40
"ST": "65", // 0x41
"LD": "66", // 0x42
"SET": "67", // 0x43
"JMP": "80", // 0x50
"JMPI": "81", // 0x51
"IND": "82", // 0x52
"EXTRO": "96", // 0x60
"BALANCE": "97", // 0x61
"MKTX": "112", // 0x70
"DATA": "128", // 0x80
"DATAN": "129", // 0x81
"MYADDRESS": "144", // 0x90
"BLKHASH": "145", // 0x91
"COINBASE": "146", // 0x92
"SUICIDE": "255", // 0xff
}
func CompileInstr(s string) (string, error) {
tokens := strings.Split(s, " ")
if OpCodes[tokens[0]] == "" {
return "", errors.New(fmt.Sprintf("OP not found: %s", tokens[0]))
}
code := OpCodes[tokens[0]] // Replace op codes with the proper numerical equivalent
op := new(big.Int)
op.SetString(code, 0)
args := make([]*big.Int, 6)
for i, val := range tokens[1:len(tokens)] {
num := new(big.Int)
num.SetString(val, 0)
args[i] = num
}
// Big int equation = op + x * 256 + y * 256**2 + z * 256**3 + a * 256**4 + b * 256**5 + c * 256**6
base := new(big.Int)
x := new(big.Int)
y := new(big.Int)
z := new(big.Int)
a := new(big.Int)
b := new(big.Int)
c := new(big.Int)
if args[0] != nil { x.Mul(args[0], big.NewInt(256)) }
if args[1] != nil { y.Mul(args[1], BigPow(256, 2)) }
if args[2] != nil { z.Mul(args[2], BigPow(256, 3)) }
if args[3] != nil { a.Mul(args[3], BigPow(256, 4)) }
if args[4] != nil { b.Mul(args[4], BigPow(256, 5)) }
if args[5] != nil { c.Mul(args[5], BigPow(256, 6)) }
base.Add(op, x)
base.Add(base, y)
base.Add(base, z)
base.Add(base, a)
base.Add(base, b)
base.Add(base, c)
return base.String(), 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
}
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