From: Phil Jackson <phil@...>
Date: 2006-05-24T08:11:02+09:00
Subject: Re: Using rb_str_insert from c

On Wed, May 24, 2006 at 07:37:21 +0900, Joel VanderWerf wrote:
> Phil Jackson wrote:
>> The function:
>>
>> static VALUE rb_str_insert(VALUE, VALUE, VALUE)
>>
>> is defined in string.c but is static and so is not avalible to me to call
>> directly on my string. I have a feeling rb_funcall is my answer but I can't
>> find any decent documentation on getting the functions ID.
>>
> Offhand I think this will work:
>
> id_insert = rb_intern("insert"); // you can do this once
>
> rb_funcall(str, id_insert, 2, idx, str2);

You were spot-on, the mistake I was making was:

ID id = rb_intern("insert");
rb_funcall(cur_str, id, 3, cur_str, idx, str2);

Which I guess would be the Ruby equivilent of:

str.insert(str, 1, "hello world")

Thanks,
Phil