Parrot_sprintf

The attached patch implements a Parrot_sprintf function.  It doesn't do
quite what you think--it just wraps the system sprintf.  However, it
provides I and F sizes and is designed to interact with STRINGs.  For
example:

	FLOATVAL f;
	INTVAL i;
	STRING *str;

	Parrot_sprintf(&str, "Decimal: %Id\nOctal: %Io\nDecimal: %Ff\nExponent:
%Fe", i, i, f, f);

It keeps away from messing up flags--%+3.2Ff will do what it should.
However, it has one big weakness.  Currently, you'll get a buffer
overflow if the resulting string is greater than 1024 characters.

The patch doesn't actually change anything to use Parrot_sprintf; it
just defines the function and the Configure machinery needed to support
it.  It's currently in string.[hc]; I'm not sure if this is the right
place.  I won't be surprised if this isn't high-quality enough to
actually be applied.

--Brent Dax
brentdax@cpan.org
Configure pumpking for Perl 6

"Nothing important happened today."
    --George III of England's diary entry for 4-Jul-1776

• Parrot_sprintf by Brent Dax
• Re: Parrot_sprintf by Dan Sugalski