func Disassemble(script []byte) (asm []string) {
pc := new(big.Int)
for {
if pc.Cmp(big.NewInt(int64(len(script)))) >= 0 {
return
}
// Get the memory location of pc
val := script[pc.Int64()]
// Get the opcode (it must be an opcode!)
op := vm.OpCode(val)
asm = append(asm, fmt.Sprintf("%04v: %v", pc, op))
switch op {
case vm.PUSH1, vm.PUSH2, vm.PUSH3, vm.PUSH4, vm.PUSH5, vm.PUSH6, vm.PUSH7, vm.PUSH8,
vm.PUSH9, vm.PUSH10, vm.PUSH11, vm.PUSH12, vm.PUSH13, vm.PUSH14, vm.PUSH15,
vm.PUSH16, vm.PUSH17, vm.PUSH18, vm.PUSH19, vm.PUSH20, vm.PUSH21, vm.PUSH22,
vm.PUSH23, vm.PUSH24, vm.PUSH25, vm.PUSH26, vm.PUSH27, vm.PUSH28, vm.PUSH29,
vm.PUSH30, vm.PUSH31, vm.PUSH32:
pc.Add(pc, common.Big1)
a := int64(op) - int64(vm.PUSH1) + 1
if int(pc.Int64()+a) > len(script) {
return
}
data := script[pc.Int64() : pc.Int64()+a]
if len(data) == 0 {
data = []byte{0}
}
asm = append(asm, fmt.Sprintf("%04v: 0x%x", pc, data))
pc.Add(pc, big.NewInt(a-1))
}
pc.Add(pc, common.Big1)
}
return asm
}
func main() {
code, err := ioutil.ReadAll(os.Stdin)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
code = common.Hex2Bytes(string(code[:len(code)-1]))
fmt.Printf("%x\n", code)
for pc := uint64(0); pc < uint64(len(code)); pc++ {
op := vm.OpCode(code[pc])
fmt.Printf("%-5d %v", pc, op)
switch op {
case vm.PUSH1, vm.PUSH2, vm.PUSH3, vm.PUSH4, vm.PUSH5, vm.PUSH6, vm.PUSH7, vm.PUSH8, vm.PUSH9, vm.PUSH10, vm.PUSH11, vm.PUSH12, vm.PUSH13, vm.PUSH14, vm.PUSH15, vm.PUSH16, vm.PUSH17, vm.PUSH18, vm.PUSH19, vm.PUSH20, vm.PUSH21, vm.PUSH22, vm.PUSH23, vm.PUSH24, vm.PUSH25, vm.PUSH26, vm.PUSH27, vm.PUSH28, vm.PUSH29, vm.PUSH30, vm.PUSH31, vm.PUSH32:
a := uint64(op) - uint64(vm.PUSH1) + 1
fmt.Printf(" => %x", code[pc+1:pc+1+a])
pc += a
}
fmt.Println()
}
}
