package vm import ( "math/big" "github.com/ethgo.old/ethutil" ) func analyseJumpDests(code []byte) (dests map[int64]*big.Int) { dests = make(map[int64]*big.Int) lp := false var lpv *big.Int for pc := int64(0); pc < int64(len(code)); pc++ { var op OpCode = OpCode(code[pc]) 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: a := int64(op) - int64(PUSH1) + 1 if int64(len(code)) > pc+1+a { lpv = ethutil.BigD(code[pc+1 : pc+1+a]) } pc += a lp = true case JUMP, JUMPI: if lp { dests[pc] = lpv } default: lp = false } } return }