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List:       ruby-talk
Subject:    Re: Strange behaviour of rb_ary_entry
From:       Jean-Hugues Kabuiku <amazinggaijin () gmail ! com>
Date:       2015-08-23 17:35:04
Message-ID: CAKmMcUq_bDCRcLaoCz3f33QyFdij1-QKfSBzOWyhXHAG0oyJDA () mail ! gmail ! com
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On 23 Aug 2015 15:04, "Mikael Hakman" <mhakman@dkab.net> wrote:

> Hello,
>
> I'm using C inline capabilities. I get very strange results from
> rb_ary_entry function. Here is the test program:
>
> require "inline"
> class Test
>   inline do |xtest|
>     xtest.add_compile_flags('-std=c11')
>     xtest.c_singleton '
>       void run (VALUE arr) {
>         for (int i = 0; i < RARRAY_LEN(arr); i++) {
>           printf ("%d %ld\n",i,(long)rb_ary_entry (arr,(long)i));
>         }
>       }
>     '
>   end
> end
> arr = [0,1,2,3,4,5,6,7,8,9]
> Test.run arr
>
> The expected output is:
> 0 0
> 1 1
> 2 2
> 3 3
> 4 4
> 5 5
> 6 6
> 7 7
> 8 8
> 9 9
>
> Instead I get the following:
> 0 1
> 1 3
> 2 5
> 3 7
> 4 9
> 5 11
> 6 13
> 7 15
> 8 17
> 9 19
>
> What can be wrong?
>
> Thanks/Mikael
>
>

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<p dir="ltr">How to unsubscribe to this list?</p>
<div class="gmail_quote">On 23 Aug 2015 15:04, &quot;Mikael Hakman&quot; &lt;<a \
href="mailto:mhakman@dkab.net">mhakman@dkab.net</a>&gt; wrote:<br \
type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 \
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br> <br>
I'm using C inline capabilities. I get very strange results from rb_ary_entry \
function. Here is the test program:<br> <br>
require &quot;inline&quot;<br>
class Test<br>
   inline do |xtest|<br>
      xtest.add_compile_flags(&#39;-std=c11&#39;)<br>
      xtest.c_singleton &#39;<br>
         void run (VALUE arr) {<br>
            for (int i = 0; i &lt; RARRAY_LEN(arr); i++) {<br>
               printf (&quot;%d %ld\n&quot;,i,(long)rb_ary_entry (arr,(long)i));<br>
            }<br>
         }<br>
      &#39;<br>
   end<br>
end<br>
arr = [0,1,2,3,4,5,6,7,8,9]<br>
Test.run arr<br>
<br>
The expected output is:<br>
0 0<br>
1 1<br>
2 2<br>
3 3<br>
4 4<br>
5 5<br>
6 6<br>
7 7<br>
8 8<br>
9 9<br>
<br>
Instead I get the following:<br>
0 1<br>
1 3<br>
2 5<br>
3 7<br>
4 9<br>
5 11<br>
6 13<br>
7 15<br>
8 17<br>
9 19<br>
<br>
What can be wrong?<br>
<br>
Thanks/Mikael<br>
<br>
</blockquote></div>



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