[Israel.pm] 8-bit characters recognition

Roman M. Parparov romm at empire.tau.ac.il
Wed May 19 05:29:49 PDT 2004

On Wed, May 19, 2004 at 03:23:53PM +0300, Omer Zak wrote:
> On Wed, 19 May 2004, Roman M. Parparov wrote:
> > What would be a simple way to recognize if an 8-bit (ord($c) > 0x7f)
> > character is present in a string?
> 1. Don't use pattern matching.
> 2. If speed is your utmost considration, write a C function to do the job
>    and invoke it from your Perl script.
>    IIRC, 80x86 machine language supports this kind of operation by
>    prefixing an instruction with the rep prefix.
> 3. If speed is not that big concern, implement a loop which scans the
>    string character by character, and compare ord(char)&0x80 to zero.
Thanks for the proposal, but from the whole application point of view
I'd rather examine the entire string (some way to implement solution

>                                              --- Omer
> My opinions, as expressed in this E-mail message, are mine alone.
> They do not represent the official policy of any organization with which
> I may be affiliated in any way.
> WARNING TO SPAMMERS:  at http://www.zak.co.il/spamwarning.html
> _______________________________________________
> Perl mailing list
> Perl at perl.org.il
> http://www.perl.org.il/mailman/listinfo/perl
>  +++++++++++++++++++++++++++++++++++++++++++
>  This Mail Was Scanned By Mail-seCure System
>  at the Tel-Aviv University CC.

Roman M. Parparov - NASA EOSDIS project node at TAU technical manager.
Email: romm at empire.tau.ac.il		   http://www.nasa.proj.ac.il/
Phone/Fax: +972-(0)3-6405205 (work),         +972-(0)51-34-18-34 (home)
The economy depends about as much on economists as the weather does on
weather forecasters.
                -- Jean-Paul Kauffmann

More information about the Perl mailing list