Differential D1103 Diff 3228 src/script/interpreter.cpp

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src/script/interpreter.cpp

Show First 20 Lines • Show All 1,225 Lines • ▼ Show 20 Lines	try {
}		}
} break;		} break;

case OP_NUM2BIN: {		case OP_NUM2BIN: {
if (!fEnabledOpCodesMonolith) {		if (!fEnabledOpCodesMonolith) {
// Disabled opcodes.		// Disabled opcodes.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);		return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
}		}
		// (in size -- out)
		if (stack.size() < 2) {
		return set_error(
		serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
		}
		CScriptNum num(stacktop(-2), fRequireMinimal);
		int64_t size = CScriptNum(stacktop(-1), fRequireMinimal).getint();
		if (size < 1 \|\| static_cast<uint64_t>(size) > CScriptNum::nDefaultMaxNumSize) {
		return set_error(
		serror, SCRIPT_ERR_INVALID_NUM2BIN_OPERATION);
		}
		// Produces a byte vector of num and check if input size
		// is valid
		valtype vchNum = num.getvch();
		if (size < vchNum.size()) {
		return set_error(
		serror, SCRIPT_ERR_INVALID_NUM2BIN_OPERATION);
		}
		// Initialize byte vector for result
		valtype result;
		result.reserve(size);
		bool neg{false};
		// Avoid negative zero
		if (!vchNum.empty()) {
		neg = *vchNum.rbegin() & 0x80;
		*vchNum.rbegin() &= ~0x80;
		}
		// Pad result to declared input size
		size_t pad = size - vchNum.size();
		for (uint8_t i = 0; i < pad; ++i) {
		result.push_back(0);
		}
		for (auto i = vchNum.rbegin(); i != vchNum.rend(); ++i) {
		result.push_back(*i);
		}
		if (neg) *result.begin() \|= 0x80;
		stack.pop_back();
		stack.pop_back();
		stack.push_back(result);
} break;		} break;

default:		default:
return set_error(serror, SCRIPT_ERR_BAD_OPCODE);		return set_error(serror, SCRIPT_ERR_BAD_OPCODE);
}		}

// Size limits		// Size limits
if (stack.size() + altstack.size() > 1000) {		if (stack.size() + altstack.size() > 1000) {
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