Function makePad

src/jrd/SysFunction.cpp:1720–1764

void makePad(DataTypeUtilBase* dataTypeUtil, const SysFunction* function, dsc* result,
	int argsCount, const dsc** args)
{
	fb_assert(argsCount >= function->minArgCount);

	result->makeNullString();

	bool isNullable;
	if (initResult(result, argsCount, args, &isNullable))
		return;

	const dsc* value1 = args[0];
	const dsc* length = args[1];
	const dsc* value2 = (argsCount >= 3 ? args[2] : NULL);

	if (value1->isBlob())
		*result = *value1;
	else if (value2 && value2->isBlob())
		*result = *value2;
	else
	{
		result->clear();
		result->dsc_dtype = dtype_varying;
	}

	result->setBlobSubType(value1->getBlobSubType());
	result->setTextType(value1->getTextType());

	if (!result->isBlob())
	{
		if (length->dsc_address)	// constant
		{
			result->dsc_length = static_cast<USHORT>(sizeof(USHORT)) + dataTypeUtil->fixLength(result,
				CVT_get_long(length, 0, JRD_get_thread_data()->getAttachment()->att_dec_status, ERR_post) *
					dataTypeUtil->maxBytesPerChar(result->getCharSet()));
		}
		else
		{
			result->dsc_length = static_cast<USHORT>(sizeof(USHORT)) +
				dataTypeUtil->fixLength(result, MAX_STR_SIZE);
		}
	}

	result->setNullable(isNullable);
}


void makeReplace(DataTypeUtilBase* dataTypeUtil, const SysFunction* function, dsc* result,