From: Brian Candler <B.Candler@...>
Date: 2003-04-12T03:34:00+09:00
Subject: Re: rb_str_chomp or rb_str_strip

On Sat, Apr 12, 2003 at 02:46:42AM +0900, Jim Freeze wrote:
> On Saturday, 12 April 2003 at  1:58:00 +0900, ts wrote:
> > >>>>> "J" == Jim Freeze <jim@freeze.org> writes:
> > 
> > J> is #chomp! called via:
> > 
> > J>   res = rb_funcall2(str, rb_intern("chomp!"), 0, 0);
> > 
> 
> Is there an efficient way to test for a character in a string?
> 
> Using rb_funcall, I could do:
> 
>   VALUE testchr = rb_str_new("+", 1);
>   VALUE chr = rb_funcall(str,rb_intern("[]"), 1, INT2FIX(0));
> 
> Now that I have testchr and chr, I don't know how to compare them.
> and, it seems awfully inefficient.
>   
> I'd rather do someting like:
> 
>   if ( '+' == *(RSTRING(str)->ptr) ) {
> 
> but this doesn't seem to work either.

By the time you've done RSTRING you've got yourself a char* pointer, so have
a look at memchr() in the standard C library. Of course, this means you've
now moved away from Ruby programming and into C programming :-)

Regards,

Brian.