Re: How do I output FourCharCode variable as text?

• Subject: Re: How do I output FourCharCode variable as text?
• From: Camillo Lugaresi <email@hidden>
• Date: Thu, 27 Nov 2003 18:46:53 +0100

On 11/27/03 7:31 AM, Jim Hamilton wrote:

I can break that!

Print(0x30004142);

would be rendered as "0".

If it breaks, don't do that!

The FourCharCode type is for four character codes, as you can tell by the
name. This is not a user input type where we need to handle extreme and
nonsensical values. It is a type created by developers for developers. All
we need to do is establish a reasonable convention and follow it. A simple
hack allows using the type to convey numbers up to 538976287 (0x2020201F).
That is a lot of numbers. If that is not enough for your application, use a
different type, such as UInt32 or CFStringRef.

Good point, but in MacRoman only the control characters are unprintable, so
a very simple test will at least produce something where you can tell what
it is:

void Print(FourCharCode id)
{
if (id >= 0x20202020)
printf("%.4s", (char*)&id);
else
printf("0x%08x", id);
}

I've actually used code like this before in applications where IDs were a
mixture of alpha codes and numbers.

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