Frank,
First let me say: "Very cool, man!" I was inspired by your 30 minutes to take
a few of my own to see if I could duplicate your experiment in our somewhat
more staid (i.e., no PDSE's for application COBOL load modules) environment,
and sure enough I can. I had to make a couple of small changes to your code to
accomplish my test:
1. Remove PROCESS cards and default to shop-standard PGMNAME(COMPAT) and
DYNAM
2. Change underscores to hyphens in the data names
3. Add "using" and "returning" parameters to the "regerror" call, which I
guess never caused you a problem due to no errors happening at execution time
4. Use double-quotes instead of apostrophes around the called program
names due to an internal application standard requirement (don't ask, long
story)
So below is my revised copy of your code, which works when compiled to a load
module in a PDS and produces the same output as you got. Thank you for taking
the time to show us how to do this!
Peter
Revised code:
identification division.
program-id. "TSTREGEX".
data division.
working-storage section.
01 regex.
05 re-nsub comp-5 pic s9(8).
05 re-comp pointer.
05 re-cflags comp-5 pic s9(8).
05 re-erroff comp-5 pic s9(8).
05 re-len comp-5 pic s9(8).
05 re-ucoll comp-5 pic s9(4) occurs 2.
05 re-lsub pointer occurs 10.
05 re-esub pointer occurs 10.
05 re-map display pic x(256).
05 re-shift comp-5 pic s9(4).
05 re-dbcs comp-5 pic s9(4).
77 reti comp-5 pic s9(8).
77 msgbuf display pic x(100).
77 lmsgbuf comp pic s9(8).
procedure division.
call "regcomp" using regex
content z"^a[[:alnum:]]"
value 0
returning reti
if reti is not equal to zero
display 'Could not compile regex'
stop run
end-if
call "regexec" using regex
content z'abc'
value 0 0 0
returning reti
perform check-reti
call "regexec" using regex
content z'qxp'
value 0 0 0
returning reti
perform check-reti
call "regfree" using regex
goback.
check-reti.
evaluate reti
when zero
display 'match'
when 1
display 'no match'
when other
move length of msgbuf to lmsgbuf
call "regerror" using regex
msgbuf
lmsgbuf
returning reti
display 'Regex match failed: ' msgbuf
stop run
end-evaluate
.
end program "TSTREGEX".
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Frank Swarbrick
Sent: Wednesday, July 03, 2013 2:17 PM
To: [email protected]
Subject: Re: Announcing PCRE 8.33 for native z/OS
Not to discourage you, as I'm sure porting PCRE to z/OS is a fine idea, but it
would not be true to say that regex processing is not available for COBOL (or
PL/I) on z/OS. I was looking through the IBM XL C/C++ for z/OS Run-Time
Library Reference the other day (god knows why, since I don't even have access
to XL C/C++) and noticed that there were some regular expression features.
So I just took about 30 minutes and came up with this COBOL program (based on C
code found here:
http://stackoverflow.com/questions/1085083/regular-expressions-in-c-examples):
<Prior version of regex COBOL code snipped to shorten email>
It compiles and runs fine, with the following results:
match
no match
Pretty cool, I must say!
FWIW, I didn't need to have the regex data item be the group data item as
above. I could have just made it a DISPLAY PIC X(364), since I'm not referring
to any of the fields within the group in my COBOL program.
Frank
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