Function IsStringInList

source/util.cpp:3028–3080

#if 0 // Currently unused.
bool IsStringInList(LPTSTR aStr, LPTSTR aList, bool aFindExactMatch)
// Checks if aStr exists in aList (which is a comma-separated list).
// If aStr is blank, aList must start with a delimiting comma for there to be a match.
{
	// Must use a temp. buffer because otherwise there's no easy way to properly match upon strings
	// such as the following:
	// if var in string,,with,,literal,,commas
	TCHAR buf[LINE_SIZE];
	TCHAR *next_field, *cp, *end_buf = buf + _countof(buf) - 1;

	// v1.0.48.01: Performance improved by Lexikos.
	for (TCHAR *this_field = aList; *this_field; this_field = next_field) // For each field in aList.
	{
		for (cp = buf, next_field = this_field; *next_field && cp < end_buf; ++cp, ++next_field) // For each char in the field, copy it over to temporary buffer.
		{
			if (*next_field == ',') // This is either a delimiter (,) or a literal comma (,,).
			{
				++next_field;
				if (*next_field != ',') // It's "," instead of ",," so treat it as the end of this field.
					break;
				// Otherwise it's ",," and next_field now points at the second comma; so copy that comma
				// over as a literal comma then continue copying.
			}
			*cp = *next_field;
		}

		// The end of this field has been reached (or reached the capacity of the buffer), so terminate the string
		// in the buffer.
		*cp = '\0';

		if (*buf) // It is possible for this to be blank only for the first field.  Example: if var in ,abc
		{
			if (aFindExactMatch)
			{
				if (!g_tcscmp(aStr, buf)) // Match found
					return true;
			}
			else // Substring match
				if (g_tcsstr(aStr, buf)) // Match found
					return true;
		}
		else // First item in the list is the empty string.
			if (aFindExactMatch) // In this case, this is a match if aStr is also blank.
			{
				if (!*aStr)
					return true;
			}
			else // Empty string is always found as a substring in any other string.
				return true;
	} // for()

	return false;  // No match found.
}
#endif