From: Yukihiro Matsumoto <matz@...>
Date: 2005-09-14T08:12:35+09:00
Subject: Re: Question on StringValuePtr, rb_str_dup

Hi,

In message "Re: Question on StringValuePtr, rb_str_dup"
    on Wed, 14 Sep 2005 06:38:44 +0900, "Berger, Daniel" <Daniel.Berger@qwest.com> writes:

|I'm having a hard time preserving a string.  Essentially, what's
|happening is that even though I'm dup'ing the original string, after I
|pass it a C function that modifies the receiver, both the original
|string *and* the dup appear to be affected.

Because plain duplication shares internal memory region.  You have to
call rb_str_modify() before modifying a string.

							matz.