#strict 2

global func FormatN(string format, array placeholders, array items)
{
	if(!items && GetType(placeholders[0]) == C4V_Array)
	{
		items = CreateArray(GetLength(placeholders));
		for(var i = 0; i < GetLength(placeholders); ++i)
		{
			items[i] = placeholders[i][1];
			placeholders[i] = placeholders[i][0];
		}
	}

	var ret = "";

	var inPlaceholder = 0;
	var placeholderType = "";
	var placeholderPart = "";

	for(var i = 0; i < GetLength(format); ++i)
	{
		var c = format[i];
		if(c == "%")
		{
			if(inPlaceholder == 0)
			{
				inPlaceholder = 1;
			}
			else if(inPlaceholder == 1)
			{
				if(GetLength(placeholderType) == 0)
				{
					ret ..= "%";
					inPlaceholder = 0;
				}
				else
				{
					inPlaceholder = 2;
				}
			}
			else if(inPlaceholder == 2)
			{
				var index = GetIndexOf2(placeholderPart, placeholders);
				if(index == -1)
				{
					FatalError(Format("FormatN: Unkown placeholder \"%s\"", placeholderPart));
					return 0;
				}

				ret = Format(Format("%%s%%%s", placeholderType), ret, items[index]);

				inPlaceholder = 0;
				placeholderType = "";
				placeholderPart = "";
			}
		}
		else
		{
			if(inPlaceholder == 0)
			{
				ret ..= c;
			}
			else if(inPlaceholder == 1)
			{
				placeholderType ..= c;
			}
			else if(inPlaceholder == 2)
			{
				placeholderPart ..= c;
			}
		}
	}

	if(inPlaceholder == 1)
	{
		FatalError(Format("FormatN: Placeholder not finished at end of format-string: \"%%%s\"", placeholderType));
		return 0;
	}
	else if(inPlaceholder == 2)
	{
		FatalError(Format("FormatN: Placeholder not finished at end of format-string: \"%%%s%%%s\"", placeholderType, placeholderPart));
		return 0;
	}

	return ret;
}