Method IsInt

source/common/utility/zstring.cpp:1081–1144

}

bool FString::IsInt () const
{
	// String must match: [whitespace] [{+ | �}] [0 [{ x | X }]] [digits] [whitespace]

/* This state machine is based on a simplification of re2c's output for this input:
digits		= [0-9];
hexdigits	= [0-9a-fA-F];
octdigits	= [0-7];

("0" octdigits+ | "0" [xX] hexdigits+ | (digits \ '0') digits*) { return true; }
[\000-\377] { return false; }*/

	//FIX for "0" returning false, doesn't fix 0 with whitespace, but that isn't necessary for savegame loading, so it'll need to be fixed later
	if(Len() == 1 && Chars[0] == '0') return true;



	const char *YYCURSOR = Chars;
	char yych;

	yych = *YYCURSOR;

	// Skip preceding whitespace
	while (yych != '\0' && isspace((unsigned char)yych)) { yych = *++YYCURSOR; }

	// Check for sign
	if (yych == '+' || yych == '-') { yych = *++YYCURSOR; }

	if (yych == '0')
	{
		yych = *++YYCURSOR;
		if (yych >= '0' && yych <= '7')
		{
			do { yych = *++YYCURSOR; } while (yych >= '0' && yych <= '7');
		}
		else if (yych == 'X' || yych == 'x')
		{
			bool gothex = false;
			yych = *++YYCURSOR;
			while ((yych >= '0' && yych <= '9') || (yych >= 'A' && yych <= 'F') || (yych >= 'a' && yych <= 'f'))
			{
				gothex = true;
				yych = *++YYCURSOR;
			}
			if (!gothex) return false;
		}
		else
		{
			return false;
		}
	}
	else if (yych >= '1' && yych <= '9')
	{
		do { yych = *++YYCURSOR; } while (yych >= '0' && yych <= '9');
	}
	else
	{
		return false;