Method matches

src/jrd/Collation.cpp:606–645

Return true if a string (p1, l1) matches a given pattern (p2, l2). The character '?' in the pattern may match any single character in the the string, and the character '*' may match any sequence of characters. Wide SCHAR version operates on short-based buffer, instead of SCHAR-based. Matches is not a case-sensitive operation, thus it has no 8-bit international impact.

	 // Matches is not a case-sensitive operation, thus it has no
	 // 8-bit international impact.
	static bool matches(MemoryPool& pool, Jrd::TextType* obj, const CharType* p1,
		SLONG l1_bytes, const CharType* p2, SLONG l2_bytes)
	{
		fb_assert(p1 != NULL);
		fb_assert(p2 != NULL);
		fb_assert((l1_bytes % sizeof(CharType)) == 0);
		fb_assert((l2_bytes % sizeof(CharType)) == 0);
		fb_assert((obj->getCanonicalWidth() == sizeof(CharType)));

		SLONG l1 = l1_bytes / sizeof(CharType);
		SLONG l2 = l2_bytes / sizeof(CharType);

		while (l2-- > 0)
		{
			const CharType c = *p2++;
			if (c == *(CharType*) obj->getCanonicalChar(CHAR_GDML_MATCH_ANY))
			{
				while ((l2 > 0) && (*p2 == *(CharType*) obj->getCanonicalChar(CHAR_GDML_MATCH_ANY)))
				{
					l2--;
					p2++;
				}
				if (l2 == 0)
					return true;
				while (l1)
				{
					if (matches(pool, obj, p1++, l1-- * sizeof(CharType), p2, l2 * sizeof(CharType)))
						return true;
				}
				return false;
			}
			if (l1-- == 0)
				return false;
			if (c != *(CharType*) obj->getCanonicalChar(CHAR_GDML_MATCH_ONE) && c != *p1)
				return false;
			p1++;
		}

		return !l1;
	}
};

template <typename CharType, typename StrConverter = CanonicalConverter<> >