Re: RPGLE pgm to parse a string

This will do what you need, in only one pass:

     d string2test     s           1024a   inz('this_is_my_test_string')
     d substring       s           1024a   inz
     d i1              s             10i 0 inz
     d i2              s             10i 0 inz
     d i3              s             10i 0 inz
     d counter         s             10i 0 inz

      /free

          Reset i1;
          Reset i2;
          Reset i3;
          For counter = %len(%trim(string2test)) downto 1;
             If %subst(string2test:counter:1) = '_';
                Select;
                When i1 = *zeros;
                   i1 = counter;
                When i2 = *zeros;
                   i2 = counter;
                When i3 = *zeros;
                   i3 = counter;
                   Leave;
                EndSl;
             EndIf;
          EndFor;
          If i3 <> *zeros;
             substring = %subst(string2test:
                                i3 + 1:
                                i2 - i3 - 1);
          Else;
             substring = *blanks;
          EndIf;
      /end-free

If there are at least 3 underscore characters in the string to test, 
substring now contains the text between underscore 2-from-last and 
3-from-last.

In this case, it will contain 'my'.

I hope this helps,

Peter Colpaert
Application Developer
PLI - IT - Kontich, Belgium
-----
Yoda of Borg are we.  Futile is resistance, assimilated will you be.
-----



"Stiju Easo" <stiju.as400@xxxxxxxxx> 
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
05/04/2006 15:08
Please respond to
RPG programming on the AS400 / iSeries <rpg400-l@xxxxxxxxxxxx>


To
Michael_Schutte@xxxxxxxxxxxx, rpg400-l@xxxxxxxxxxxx
cc

Subject
Re: RPGLE pgm to parse a string






Sorry if i have trobuled u

 thing is that i want to get 'my' from 'this_is_my_test_string'

where everything could be varible except the fact that varible i want to
extract comes b/w second from  last and third from last   '_',

i hope u  clear with it, from my analisis what i found is

1)  there r very few operators/built in functions which could help me 
while
i come from right to left,
2) going from left to right i cant determine where the string comes( i 
need
2 pass for that)
   i think this results in more computation

thats why i asked for alternative