From: "Niklas C." <cathor.niklas@...>
Date: 2008-04-29T14:15:51+09:00
Subject: Re: converting strings in c extension

Whow, that really gave me a hint!
Doing
ldist 'foo','bar'
now prints:

main
'foo'

So for some reason main is given as the first argument. Does ruby always 
do that? doesn't make much sense to me...

Anyway, I solved the problem by adding another (first) parameter to 
rb_ldist, but still specifying 2 parameters down in the rb_define_method 
call. Seems like a dirty hack but it's working, thank's a lot ;)


Joel VanderWerf wrote:
> Niklas C. wrote:
>> While trying to bind some old C code to ruby I ran into trouble
>> converting strings. The function in question requires two string
>> arguments (const char*). This is the relevant part of my binding:
>> 
> 
> Try adding the following lines to see what the objects really are:
> 
>> ...
>> static VALUE rb_ldist(VALUE s, VALUE t)
>> {
>      rb_p(s);
>      rb_p(t);
>>   return INT2FIX(ldist(StringValuePtr(s),StringValuePtr(t)));
>> }
>> ...
> 
> (Btw, README.EXT should mention this function. It's very useful.)

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