From: Eero Saynatkari <ruby-forum-reg@...>
Date: 2006-01-21T12:44:36+09:00
Subject: Re: Extending ruby with c

ruby talk wrote:
> I am using the pickaxe example to help learn how it is writen.
> Thank you once again.
> Becker
> 
> my run program
> [code]
> require "C:\\ruby\\Test"
> t = Test.new()
> t.add("Bill Chase")
> [code]
> 
> my code example from pickaxe  saved as a .rb

This here is the problem; the below code must be
saved as a .c file and then compiled to a library
using extconf.rb (the Pickaxe should have further
instructions for this). Once done, you will have
a Test.so file that you can #require for example
from irb.

> [code]
> #include "ruby.h"
> static VALUE t_init(VALUE self)
> {
>   VALUE arr;
>   arr = rb_ary_new();
>   rb_iv_set(self, "@arr", arr);
>   return self;
> }
> 
> static VALUE t_add(VALUE self, VALUE anObject)
> {
>   VALUE arr;
>   arr = rb_iv_get(self, "@arr");
>   rb_ary_push(arr, anObject);
>   return arr;
> }
> 
> VALUE cTest;
> 
> void Init_Test() {
>   cTest = rb_define_class("Test", rb_cObject);
>   rb_define_method(cTest, "initialize", t_init, 0);
>   rb_define_method(cTest, "add", t_add, 1);
> }
> 
> [code]
> 
> 
> < Error messages elided />

The code itself is fine, you just need to compile it.


E


-- 
Posted via http://www.ruby-forum.com/.