Re: [cc65] Print heart character on C64?

From: Ullrich von Bassewitz <>
Date: 2004-12-01 12:48:02

On Wed, Dec 01, 2004 at 12:29:58PM +0100, Spiro Trikaliotis wrote:
> Yes, I know. In fact, sprintf() has many other problems, too. I have not
> checked, but cc65 does not happen to have an snprintf() function? (I'm
> curious to see the first exploit for a 6502 computer...)

snprintf is C99, this is the reason why I didn't bother to implement it.
Adding it wouldn't be a big deal anyway, minor changes (if any) in the basic
_printf function would be needed.

> Well, my question was: Does the standard guarantee that *only* strings
> and character literals are converted? I fear some compilers trying to
> convert the contents of a char variable (for example, if I use the above
> sprintf(), my 0x01 would be translated!)

I don't know of any statement in the standard that allows translation of
arbitrary numerical values. The reason why character and string literals can
be translated is that the standard defines a "source character set" and an
"execution character set". The representation of the execution character set
using characters of the source character set in string and character literals
is implementation defined.



Ullrich von Bassewitz                        
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Received on Wed Dec 1 12:48:11 2004

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