From: 'cduck' Chris Grierson <cduck@...>
Date: 2002-01-29T06:20:49+09:00
Subject: Re: C API/method arguments

so chalk that up as a newbie not reading the documentation well enough

sorry, i learned most of ruby in one night and the C API the next day.
everything kind of blurred together from the overload.  apologies.

guy, thank you very much, though, for answering the question directly
regardless.

-c

[ Structural Informatics Group  ]
[ Dept. of Biological Structure ]
[ University of Washington      ]

[ 206.616.7356:office ]
[ 206.795.4998:cell   ]

------------------------------------------------------------------------

On Tue, 29 Jan 2002, ts wrote:

> >>>>> "C" == C Grierson <cbgb@u.washington.edu> writes:
>
> C> i hope i'm not being a complete list newbie, but i was wondering if
> C> anyone could share any resources for programming in the C API.  i
> C> managed to write a cracklib interface class, but i realized i don't
> C> know how to deal with variable arguments and my 'initialize' insists
> C> on one parameter.
>
>  Well, you have in README.EXT
>
>  ------------------------------------------------------------
>
> ** Method Definition
>
>  rb_define_method(VALUE klass, const char *name, VALUE (*func)(), int argc)
>
> Defines a method for the class.  func is the function pointer.  argc
> is the number of arguments.  if argc is -1, the function will receive
> 3 arguments argc, argv, and self.  if argc is -2, the function will
> receive 2 arguments, self and args, where args is the Ruby array of
> the method arguments.
>
>  ------------------------------------------------------------
>
>
>  This mean that you can write
>
>    static VALUE
>    tt_init(argc, argv, obj)
>        int argc;
>        VALUE *argv, obj;
>    {
>    }
>
>  ...
>
>    rb_define_method(tt_cTT, "initialize", tt_init, -1);
>
>  ...
>
>
>  when tt_init() is called argc is the number of arguments given to it.
>
>
> Guy Decoux
>