Function pad_spaces

src/jrd/intl.cpp:1342–1383

static void pad_spaces(thread_db* tdbb, CHARSET_ID charset, BYTE* ptr, ULONG len)
{								/* byte count */
/**************************************
 *
 *      p a d  _ s p a c e s
 *
 **************************************
 *
 * Functional description
 *      Pad a buffer with the character set defined space character.
 *
 **************************************/
	SET_TDBB(tdbb);

	fb_assert(ptr != NULL);

	CharSet* obj = INTL_charset_lookup(tdbb, charset);

	// Single-octet character sets are optimized here
	if (obj->getSpaceLength() == 1)
	{
		const BYTE* const end = &ptr[len];
		while (ptr < end)
			*ptr++ = *obj->getSpace();
	}
	else
	{
		const BYTE* const end = &ptr[len];
		const UCHAR* space = obj->getSpace();
		const UCHAR* const end_space = &space[obj->getSpaceLength()];
		while (ptr < end)
		{
			space = obj->getSpace();
			while (ptr < end && space < end_space) {
				*ptr++ = *space++;
			}
			// This fb_assert is checking that we didn't have a buffer-end
			// in the middle of a space character
			fb_assert(!(ptr == end) || (space == end_space));
		}
	}
}