2
0
mirror of https://github.com/status-im/op-geth.git synced 2025-01-27 15:05:18 +00:00
2015-03-23 16:59:09 +01:00

46 lines
1012 B
Go

package vm
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
)
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 := OpCode(val)
asm = append(asm, fmt.Sprintf("%v", op))
switch op {
case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
pc.Add(pc, common.Big1)
a := int64(op) - int64(PUSH1) + 1
if int(pc.Int64()+a) > len(script) {
return nil
}
data := script[pc.Int64() : pc.Int64()+a]
if len(data) == 0 {
data = []byte{0}
}
asm = append(asm, fmt.Sprintf("0x%x", data))
pc.Add(pc, big.NewInt(a-1))
}
pc.Add(pc, common.Big1)
}
return
}