void StackInterpreter::processOpCode(const OpCode& oc)
{
++opcount_;
//handle push data by itself, doesn't play well with switch
if (oc.opcode_ == 0)
{
op_0();
return;
}
if (oc.opcode_ <= 75)
{
stack_.push_back(oc.dataRef_);
return;
}
if (oc.opcode_ < 79)
{
//op push data
stack_.push_back(oc.dataRef_);
return;
}
if (oc.opcode_ == OP_1NEGATE)
{
op_1negate();
return;
}
if (oc.opcode_ <= 96 && oc.opcode_ >= 81)
{
//op_1 - op_16
uint8_t val = oc.opcode_ - 80;
stack_.push_back(move(intToRawBinary(val)));
return;
}
//If we got this far this op code is not push data. If this is the input
//script, set the flag as per P2SH parsing rules (only push data in inputs)
if (outputScriptRef_.getSize() == 0)
onlyPushDataInInput_ = false;
switch (oc.opcode_)
{
case OP_NOP:
break;
case OP_IF:
{
BinaryRefReader brr(oc.dataRef_);
op_if(brr, false);
break;
}
case OP_NOTIF:
{
op_not();
BinaryRefReader brr(oc.dataRef_);
op_if(brr, false);
break;
}
case OP_ELSE:
//processed by opening if statement
throw ScriptException("a wild else appears");
case OP_ENDIF:
//processed by opening if statement
throw ScriptException("a wild endif appears");
case OP_VERIFY:
op_verify();
break;
case OP_TOALTSTACK:
op_toaltstack();
break;
case OP_FROMALTSTACK:
op_fromaltstack();
break;
case OP_IFDUP:
op_ifdup();
break;
case OP_2DROP:
{
stack_.pop_back();
stack_.pop_back();
break;
}
case OP_2DUP:
op_2dup();
break;
case OP_3DUP:
op_3dup();
break;
case OP_2OVER:
op_2over();
break;
case OP_DEPTH:
op_depth();
break;
case OP_DROP:
stack_.pop_back();
break;
case OP_DUP:
op_dup();
break;
case OP_NIP:
op_nip();
break;
case OP_OVER:
op_over();
break;
case OP_PICK:
op_pick();
break;
case OP_ROLL:
op_roll();
break;
case OP_ROT:
op_rot();
break;
case OP_SWAP:
op_swap();
break;
case OP_TUCK:
op_tuck();
break;
case OP_SIZE:
op_size();
break;
case OP_EQUAL:
{
op_equal();
if (onlyPushDataInInput_ && p2shScript_.getSize() != 0)
{
//check the op_equal result
op_verify();
if (!isValid_)
break;
if (flags_ & SCRIPT_VERIFY_SEGWIT)
if (p2shScript_.getSize() == 22 ||
p2shScript_.getSize() == 34)
{
auto versionByte = p2shScript_.getPtr();
if (*versionByte <= 16)
{
processSW(p2shScript_);
return;
}
}
processScript(p2shScript_, true);
}
break;
}
case OP_EQUALVERIFY:
{
op_equal();
op_verify();
break;
}
case OP_1ADD:
op_1add();
break;
case OP_1SUB:
op_1sub();
break;
case OP_NEGATE:
op_negate();
break;
case OP_ABS:
op_abs();
break;
case OP_NOT:
op_not();
break;
case OP_0NOTEQUAL:
op_0notequal();
break;
case OP_ADD:
op_add();
break;
case OP_SUB:
op_sub();
break;
case OP_BOOLAND:
op_booland();
break;
case OP_BOOLOR:
op_boolor();
break;
case OP_NUMEQUAL:
op_numequal();
break;
case OP_NUMEQUALVERIFY:
{
op_numequal();
op_verify();
break;
}
case OP_NUMNOTEQUAL:
op_numnotequal();
break;
case OP_LESSTHAN:
op_lessthan();
break;
case OP_GREATERTHAN:
op_greaterthan();
break;
case OP_LESSTHANOREQUAL:
op_lessthanorequal();
break;
case OP_GREATERTHANOREQUAL:
op_greaterthanorequal();
break;
case OP_MIN:
op_min();
break;
case OP_MAX:
op_max();
break;
case OP_WITHIN:
op_within();
break;
case OP_RIPEMD160:
op_ripemd160();
break;
case OP_SHA256:
{
//save the script if this output is a possible p2sh
if (flags_ & SCRIPT_VERIFY_P2SH_SHA256)
if (opcount_ == 1 && onlyPushDataInInput_)
p2shScript_ = stack_back();
op_sha256();
break;
}
case OP_HASH160:
{
//save the script if this output is a possible p2sh
if (flags_ & SCRIPT_VERIFY_P2SH)
if (opcount_ == 1 && onlyPushDataInInput_)
p2shScript_ = stack_back();
op_hash160();
break;
}
case OP_HASH256:
op_hash256();
break;
case OP_CODESEPARATOR:
{
opcount_ = 0;
if (outputScriptRef_.getSize() != 0)
txStubPtr_->setLastOpCodeSeparator(inputIndex_, oc.offset_);
break;
}
case OP_CHECKSIG:
op_checksig();
break;
case OP_CHECKSIGVERIFY:
{
op_checksig();
op_verify();
break;
}
case OP_CHECKMULTISIG:
op_checkmultisig();
break;
case OP_CHECKMULTISIGVERIFY:
{
op_checkmultisig();
op_verify();
}
case OP_NOP1:
break;
case OP_NOP2:
{
if (!(flags_ & SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY))
break; // not enabled; treat as a NOP
//CLTV mechanics
throw ScriptException("OP_CLTV not supported");
}
case OP_NOP3:
{
if (!(flags_ & SCRIPT_VERIFY_CHECKSEQUENCEVERIFY))
break; // not enabled; treat as a NOP
//CSV mechanics
throw ScriptException("OP_CSV not supported");
}
case OP_NOP4:
break;
case OP_NOP5:
break;
case OP_NOP6:
break;
case OP_NOP7:
break;
case OP_NOP8:
break;
case OP_NOP9:
break;
case OP_NOP10:
break;
default:
{
stringstream ss;
ss << "unknown opcode: " << (unsigned)oc.opcode_;
throw runtime_error(ss.str());
}
}
}
static int
op_oplevel(int level)
{
int precision;
bwx_DEBUG(__FUNCTION__);
/* set the precision */
if ((precision = op_getprecision(level)) == OP_ERROR)
{
op_pulldown(2);
sprintf(bwb_ebuf, "exp_operation(): failed to set precision.");
bwb_error(bwb_ebuf);
return FALSE;
}
/* precision is set correctly */
else
{
switch (CURTASK exps[level].operation)
{
case OP_ADD:
op_add(level, precision);
break;
case OP_SUBTRACT:
op_subtract(level, precision);
break;
case OP_MULTIPLY:
op_multiply(level, precision);
break;
case OP_DIVIDE:
op_divide(level, precision);
break;
case OP_ASSIGN:
op_assign(level, precision);
break;
case OP_EQUALS:
op_equals(level, precision);
break;
case OP_LESSTHAN:
op_lessthan(level, precision);
break;
case OP_GREATERTHAN:
op_greaterthan(level, precision);
break;
case OP_LTEQ:
op_lteq(level, precision);
break;
case OP_GTEQ:
op_gteq(level, precision);
break;
case OP_NOTEQUAL:
op_notequal(level, precision);
break;
case OP_MODULUS:
op_modulus(level, precision);
break;
case OP_INTDIVISION:
op_intdiv(level, precision);
break;
case OP_OR:
op_or(level, precision);
break;
case OP_AND:
op_and(level, precision);
break;
case OP_NOT:
op_not(level, precision);
break;
case OP_XOR:
op_xor(level, precision);
break;
case OP_IMPLIES:
op_imp(level, precision);
break;
case OP_EQUIV:
op_eqv(level, precision);
break;
case OP_EXPONENT:
op_exponent(level, precision);
break;
case OP_NEGATION: /* JBV */
op_negation(level, precision);
break;
case OP_POSATION:
op_posation(level, precision);
break;
default:
sprintf(bwb_ebuf, "PROGRAMMING ERROR: operator <%d> not (yet) supported.", CURTASK exps[level].operation);
op_pulldown(2);
bwb_error(bwb_ebuf);
return FALSE;
break;
} /* end of case statement for operators */
} /* end of else statement, precision set */
return TRUE;
} /* end of function op_oplevel() */
