Method BLB_check_well_formed

src/jrd/blb.cpp:128–177

void blb::BLB_check_well_formed(Jrd::thread_db* tdbb, const dsc* desc)
{
/**************************************
 *
 *      b l b : : c h e c k _ w e l l _ f o r m e d
 *
 **************************************
 *
 * Functional description
 *      Check if a text BLOB is well formed.
 *
 **************************************/

	SET_TDBB(tdbb);

	// Need to verify this to work in database creation, as the charsets didn't exist yet.
	if (desc->getCharSet() == CS_NONE || desc->getCharSet() == CS_BINARY)
		return;

	CharSet* charSet = INTL_charset_lookup(tdbb, desc->getCharSet());

	if (!charSet->shouldCheckWellFormedness())
		return;

	HalfStaticArray<UCHAR, BUFFER_MEDIUM> buffer;
	ULONG pos = 0;

	while (!(blb_flags & BLB_eof))
	{
		const ULONG len = BLB_get_data(tdbb,
			buffer.getBuffer(buffer.getCapacity()) + pos, buffer.getCapacity() - pos, false);
		buffer.resize(pos + len);

		if (charSet->wellFormed(pos + len, buffer.begin(), &pos))
			pos = 0;
		else
		{
			if (pos == 0)
				status_exception::raise(Arg::Gds(isc_malformed_string));
			else
			{
				buffer.removeCount(0, pos);
				pos = buffer.getCount();
			}
		}
	}

	if (pos != 0)
		status_exception::raise(Arg::Gds(isc_malformed_string));
}


bool blb::BLB_close(thread_db* tdbb)