From: Michal Rokos <rokosm@...>
Date: 2002-01-29T16:59:21+09:00
Subject: Re: ruby extensions in C and booleans

Hello,

Martin Maciaszek <mmaciaszek@gmx.net> wrote:
> On second thought I noticed that bf is still a ruby
> representation of a boolean. I searched in "Programming Ruby" and
> ruby.h but couldn't find a macro to convert this boolean to a C
> representation of a boolean.

	From ruby.h
		Qfalse is 0 --- #define Qfalse 0
		Qtrue is 2  --- #define Qtrue  2

	Since 'C' has no special type for TRUE/FALSE, most of
	implementation uses FALSE=0, TRUE anything else.

	So there is no need to convert it, but maybe you would like make 
	it more 'clean' or use TRUE=1 (not TRUE=2 as it is).

	The solution is:
	....
	{
		int ok;
		ok = (bf == Qtrue) ? 1 : 0; /* is bf TRUE? if so, set ok
						to 1. else to 0;*/
		.....
	}

	Does this help?

		Michal
		
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Michal Rokos                           Czech Technical University, Prague
E-mail: m.rokos@sh.cvut.cz         Jabber: majkl@jabber.cz, ICQ: 36118339
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