# Problems with rb\_str\_split() **URL:** \ **Category:** ruby-talk\ **Created:** [12 November 2003 09:57 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770 "2003-11-12T09:57:54Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Ian\_Macdonald](https://avatars.discourse-cdn.com/v4/letter/i/f19dbf/32.png) [@Ian\_Macdonald](https://rubytalk.org/u/Ian_Macdonald)\ **Post date:** [12 November 2003 09:57 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/1 "2003-11-12T09:57:54Z")
> Ian Macdonald wrote: > > > > This can probably be fixed with this: > > > > > > cap\_list = rb\_str\_split(rb\_reg\_new(txt, strlen(txt), 0), comma\_sp); > > > > > > but this is entirely untested. Do you want to give it a try? > > > > OK, so that doesn’t work. I know what the problem is, but I don’t know > > how to fix it. > > You’re way ahead of me… I’m not sure I even understand the problem. > ☹ I have a piece of code that look like this: const char \*comma\_sp = ", "; cap\_list = rb\_str\_split(rb\_str\_new2(txt), comma\_sp); This worked fine in Ruby 1.6.x, but in 1.8.x, it generates a warning in any code that invokes the method: /usr/bin/mycal:101: warning: string pattern instead of regexp; metacharacters no longer effective Now, I understand why this happens and I’m quite capable of fixing the same error when it occurs in pure Ruby code, but I can’t seem to figure out how to fix it in Ruby C. The prototype from intern.h looks like this: VALUE rb\_str\_split \_((VALUE, const char\*)); So, what’s the problem? How do I pass rb\_str\_split a regex as its second argument, instead of a string? I thought the answer might be this: cap\_list = rb\_str\_split(rb\_str\_new2(txt), rb\_reg\_new(comma\_sp, strlen(comma\_sp), 0)); but that makes a VALUE out of the second argument, which is not what the prototype expects, so a warning is issued during compilation. Any ideas? Ian > **···** > > > > On Wed 29 Oct 2003 at 17:06:07 -0500, Ian Macdonald wrote: > > > – > > > Ian Macdonald | Ashes to ashes, dust to dust, If God won’t > > > System Administrator | have you, the devil must. > > > [ian@caliban.org](mailto:ian@caliban.org) | > > > [http://www.caliban.org](http://www.caliban.org) | ---
**Author:** ![ts1](https://avatars.discourse-cdn.com/v4/letter/t/a8b319/32.png) [@ts1](https://rubytalk.org/u/ts1)\ **Post date:** [12 November 2003 11:02 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/2 "2003-11-12T11:02:33Z")
> This worked fine in Ruby 1.6.x, but in 1.8.x, it generates a warning in > any code that invokes the method: Well, I don't have this problem with 1.8.1 nasun% cat aa.c #include \ void Init\_aa() {     VALUE res;     const char \*comma\_sp = ", ";     int i;     res = rb\_str\_split(rb\_str\_new2("abc, def"), ", ");     for (i = 0; i \< RARRAY(res)-\>len; i++) {         rb\_warn("found %s", StringValuePtr(RARRAY(res)-\>ptr[i]));     } } nasun% nasun% ruby -raa -ve 1 ruby 1.8.1 (2003-10-31) [sparc-solaris2.8] ./aa.so: warning: found abc ./aa.so: warning: found def -e:1: warning: useless use of a literal in void context nasun% Guy Decoux ---
**Author:** ![Ian\_Macdonald](https://avatars.discourse-cdn.com/v4/letter/i/f19dbf/32.png) [@Ian\_Macdonald](https://rubytalk.org/u/Ian_Macdonald)\ **Post date:** [13 November 2003 08:58 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/3 "2003-11-13T08:58:08Z")
Try running it with warnings enabled (-w): [ianmacd@jiskefet]$ ruby -raa -wve 1 ruby 1.8.0 (2003-08-04) [i686-linux-gnu] ./aa.so: warning: string pattern instead of regexp; metacharacters no longer effective ./aa.so: warning: found abc ./aa.so: warning: found def -e:1: warning: useless use of a literal in void context So, how do I get rid of the “string pattern instead of regexp” warning? Ian > **···** > > On Wed 12 Nov 2003 at 20:02:33 +0900, ts wrote: > > > > This worked fine in Ruby 1.6.x, but in 1.8.x, it generates a warning in > > > any code that invokes the method: > > > > Well, I don’t have this problem with 1.8.1 > > > > nasun% cat aa.c > > #include \ > > > > void Init\_aa() > > { > > VALUE res; > > const char \*comma\_sp = ", "; > > int i; > > > > ``` > > res = rb_str_split(rb_str_new2("abc, def"), ", "); > > for (i = 0; i < RARRAY(res)->len; i++) { > > rb_warn("found %s", StringValuePtr(RARRAY(res)->ptr[i])); > > } > > > > ``` > > > > } > > nasun% > > > > nasun% ruby -raa -ve 1 > > ruby 1.8.1 (2003-10-31) [sparc-solaris2.8] > > ./aa.so: warning: found abc > > ./aa.so: warning: found def > > -e:1: warning: useless use of a literal in void context > > nasun% > > – > Ian Macdonald | A is for Apple. – Hester Pryne > System Administrator | > [ian@caliban.org](mailto:ian@caliban.org) | > [http://www.caliban.org](http://www.caliban.org) | > \> ---
**Author:** ![ts1](https://avatars.discourse-cdn.com/v4/letter/t/a8b319/32.png) [@ts1](https://rubytalk.org/u/ts1)\ **Post date:** [13 November 2003 09:17 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/4 "2003-11-13T09:17:27Z")
> > Well, I don't have this problem with 1.8.1          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > Try running it with warnings enabled (-w): With -v warning are enabled > [ianmacd@jiskefet]$ ruby -raa -wve 1 > ruby 1.8.0 (2003-08-04) [i686-linux-gnu] nasun% ruby -raa -wve 1 ruby 1.8.1 (2003-10-31) [sparc-solaris2.8] ./aa.so: warning: found abc ./aa.so: warning: found def -e:1: warning: useless use of a literal in void context nasun% Guy Decoux > **···** > > > On Wed 12 Nov 2003 at 20:02:33 +0900, ts wrote: ---
**Author:** ![Ian\_Macdonald](https://avatars.discourse-cdn.com/v4/letter/i/f19dbf/32.png) [@Ian\_Macdonald](https://rubytalk.org/u/Ian_Macdonald)\ **Post date:** [13 November 2003 10:29 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/5 "2003-11-13T10:29:02Z")
So, it was just a bug in 1.8.0? Unfortunately, that’s still the latest official version, so I’m stuck with the issue at work for the time being. Thanks for your reply. Ian > **···** > > On Thu 13 Nov 2003 at 18:17:27 +0900, ts wrote: > > > > On Wed 12 Nov 2003 at 20:02:33 +0900, ts wrote: > > > > > > Well, I don’t have this problem with 1.8.1 > > > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > > > Try running it with warnings enabled (-w): > > > > With -v warning are enabled > > > > > [ianmacd@jiskefet]$ ruby -raa -wve 1 > > > ruby 1.8.0 (2003-08-04) [i686-linux-gnu] > > > > nasun% ruby -raa -wve 1 > > ruby 1.8.1 (2003-10-31) [sparc-solaris2.8] > > ./aa.so: warning: found abc > > ./aa.so: warning: found def > > -e:1: warning: useless use of a literal in void context > > nasun% > > – > Ian Macdonald | Fifth Law of Procrastination: > System Administrator | Procrastination avoids boredom; one never > [ian@caliban.org](mailto:ian@caliban.org) | has the feeling that there is nothing > [http://www.caliban.org](http://www.caliban.org) | important to do. > \> ---
**Author:** ![Zach\_Dennis1](https://avatars.discourse-cdn.com/v4/letter/z/ea5d25/32.png) [@Zach\_Dennis1](https://rubytalk.org/u/Zach_Dennis1)\ **Post date:** [13 November 2003 10:34 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/6 "2003-11-13T10:34:38Z")
Has anyone compiled ruby with bcc32 under a windows environment( preferably win2000 ) successfully? I’m having troubles. Zach > **···** > > -----Original Message----- > From: Ian Macdonald [[mailto:ian@caliban.org](mailto:ian@caliban.org)] > Sent: Thursday, November 13, 2003 5:29 AM > To: ruby-talk ML > Subject: Re: problems with rb\_str\_split() > > On Thu 13 Nov 2003 at 18:17:27 +0900, ts wrote: > > > > On Wed 12 Nov 2003 at 20:02:33 +0900, ts wrote: > > > > > > Well, I don’t have this problem with 1.8.1 > > > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > > > Try running it with warnings enabled (-w): > > > > With -v warning are enabled > > > > > [ianmacd@jiskefet]$ ruby -raa -wve 1 > > > ruby 1.8.0 (2003-08-04) [i686-linux-gnu] > > > > nasun% ruby -raa -wve 1 > > ruby 1.8.1 (2003-10-31) [sparc-solaris2.8] > > ./aa.so: warning: found abc > > ./aa.so: warning: found def > > -e:1: warning: useless use of a literal in void context > > nasun% > > So, it was just a bug in 1.8.0? Unfortunately, that’s still the latest > official version, so I’m stuck with the issue at work for the time > being. > > Thanks for your reply. > > ## Ian > > Ian Macdonald | Fifth Law of Procrastination: > System Administrator | Procrastination avoids boredom; one never > [ian@caliban.org](mailto:ian@caliban.org) | has the feeling that there is nothing > [http://www.caliban.org](http://www.caliban.org) | important to do. > \> ---
**Author:** ![ts1](https://avatars.discourse-cdn.com/v4/letter/t/a8b319/32.png) [@ts1](https://rubytalk.org/u/ts1)\ **Post date:** [13 November 2003 10:39 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/7 "2003-11-13T10:39:20Z")
> So, it was just a bug in 1.8.0? Unfortunately, that's still the latest > official version, so I'm stuck with the issue at work for the time > being. svg% diff -u aa.c~ aa.c --- aa.c~ 2003-11-13 11:34:19.000000000 +0100 +++ aa.c 2003-11-13 11:37:33.000000000 +0100 @@ -2,11 +2,14 @@ void Init\_aa() { - VALUE res; + VALUE res, rv;      const char \*comma\_sp = ", ";      int i; + rv = ruby\_verbose; + ruby\_verbose = Qnil;      res = rb\_str\_split(rb\_str\_new2("abc, def"), ", "); + ruby\_verbose = rv;      for (i = 0; i \< RARRAY(res)-\>len; i++) {          rb\_warn("found %s", StringValuePtr(RARRAY(res)-\>ptr[i]));      } svg% svg% ruby -raa -vwe 1 ruby 1.8.0 (2003-08-04) [i686-linux] ./aa.so: warning: found abc ./aa.so: warning: found def -e:1: warning: useless use of a literal in void context svg% Guy Decoux ---
**Author:** ![Ian\_Macdonald](https://avatars.discourse-cdn.com/v4/letter/i/f19dbf/32.png) [@Ian\_Macdonald](https://rubytalk.org/u/Ian_Macdonald)\ **Post date:** [13 November 2003 10:54 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/8 "2003-11-13T10:54:48Z")
That’s a nice way around the problem. Thanks! Ian > **···** > > On Thu 13 Nov 2003 at 19:39:20 +0900, ts wrote: > > > > So, it was just a bug in 1.8.0? Unfortunately, that’s still the latest > > > official version, so I’m stuck with the issue at work for the time > > > being. > > > > svg% diff -u aa.c~ aa.c > > — aa.c~ 2003-11-13 11:34:19.000000000 +0100 > > +++ aa.c 2003-11-13 11:37:33.000000000 +0100 > > @@ -2,11 +2,14 @@ > > > > void Init\_aa() > > { > > > > - VALUE res; > > > > - VALUE res, rv; > > const char \*comma\_sp = ", "; > > int i; > > > > - rv = ruby\_verbose; > > > > - ruby\_verbose = Qnil; > > res = rb\_str\_split(rb\_str\_new2(“abc, def”), ", "); > > > > - ruby\_verbose = rv; > > for (i = 0; i \< RARRAY(res)-\>len; i++) { > > rb\_warn(“found %s”, StringValuePtr(RARRAY(res)-\>ptr[i])); > > } > > – > Ian Macdonald | Actually, what I’d like is a little toy > System Administrator | spaceship!! > [ian@caliban.org](mailto:ian@caliban.org) | > [http://www.caliban.org](http://www.caliban.org) | > \> ---
**Author:** ![Mark\_Smith1](https://avatars.discourse-cdn.com/v4/letter/m/a3d4f5/32.png) [@Mark\_Smith1](https://rubytalk.org/u/Mark_Smith1)\ **Post date:** [17 November 2003 02:06 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/9 "2003-11-17T02:06:41Z")
Zach Dennis wrote: > Has anyone compiled ruby with bcc32 under a windows environment( preferably > win2000 ) successfully? > > I’m having troubles. Zach, I compiled it with no trouble by following the steps in readme.bcc32 in the bcc32 folder–both under Win2K and WinXP. Start a console. Be sure you are in the “Ruby-1.8.1” directory. Then, set your path to include both bin & the lib of bcc (path=%path%;c:\borland\bcc55\bin;c:\borland\bcc55\bib) and just follow the remaining steps. It worked, and I was able to run basic Ruby programs successfully. However, what keeps me using Andy’s Win32 install is all the little extras! Even though I can compile with bcc, I have no clue how to compile all the great \*.so file (like Oracle) that make Ruby such a valuable tool for me. Also, there’s a unique item with bcc32. When you read a file, you must be sure to include the binary flag “b” or you’ll have trouble with stripping characters–IIRC, lone CR’s in mac files on my Win box. (Now, if I only had a 4D plug-in to run Ruby in that environment!) > **···** > > – > Regards, > > Mark Smith > maslists [at] cox [dot] net ---
**Author:** ![ts1](https://avatars.discourse-cdn.com/v4/letter/t/a8b319/32.png) [@ts1](https://rubytalk.org/u/ts1)\ **Post date:** [13 November 2003 11:05 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/10 "2003-11-13T11:05:47Z")
> That's a nice way around the problem. You can still use     res = rb\_funcall(rb\_str\_new2("abc, def"), rb\_intern("split"),          1, rb\_reg\_new(", ", 2, 0)); Guy Decoux ---
**Author:** ![Zach\_Dennis1](https://avatars.discourse-cdn.com/v4/letter/z/ea5d25/32.png) [@Zach\_Dennis1](https://rubytalk.org/u/Zach_Dennis1)\ **Post date:** [17 November 2003 15:16 UTC](https://rubytalk.org/t/problems-with-rb-str-split/8770/11 "2003-11-17T15:16:57Z")
Mark, You use 4d to? I didn’t think there were any other Ruby’ers out there who used it! Maybe we shall have to write some 4D-extensions for Ruby. =) Zach > **···** > > -----Original Message----- > From: Mark Smith [[mailto:spam@fakeaddress.net](mailto:spam@fakeaddress.net)] > Sent: Sunday, November 16, 2003 9:07 PM > To: ruby-talk ML > Subject: Re: BCC32 under win environment > > Zach Dennis wrote: > > > Has anyone compiled ruby with bcc32 under a windows environment( > > preferably > > win2000 ) successfully? > > > > I’m having troubles. > > Zach, > > I compiled it with no trouble by following the steps in readme.bcc32 in > the bcc32 folder–both under Win2K and WinXP. Start a console. Be sure > you are in the “Ruby-1.8.1” directory. Then, set your path to include > both bin & the lib of bcc > (path=%path%;c:\borland\bcc55\bin;c:\borland\bcc55\bib) and just follow > the remaining steps. > > It worked, and I was able to run basic Ruby programs successfully. > However, what keeps me using Andy’s Win32 install is all the little > extras! Even though I can compile with bcc, I have no clue how to > compile all the great \*.so file (like Oracle) that make Ruby such a > valuable tool for me. > > Also, there’s a unique item with bcc32. When you read a file, you must > be sure to include the binary flag “b” or you’ll have trouble with > stripping characters–IIRC, lone CR’s in mac files on my Win box. > > (Now, if I only had a 4D plug-in to run Ruby in that environment!) > > – > Regards, > > Mark Smith > maslists [at] cox [dot] net