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String Search in a variable

 
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arien

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Joined: 02 Nov 2006
Posts: 43
Location: London

PostPosted: Tue Oct 28, 2008 8:23 am    Post subject: String Search in a variable
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Hi all,

I need to perform a string search in a variable of length X(40). The search string can be "cleardown" or "clrdwn"etc and it can be starting at any position in the variable. Eg.

"cleardown 27/10"
"w/o cleardown "
"2007 clrdown"

Based on the presence or absence of the search string in this variable, I have to do some calculations.

Is it possible to perform a string search to determine absence /presence of a string?

Regards,
Arien
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Terry Heinze

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Joined: 14 Jul 2008
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Location: Richfield, MN, USA

PostPosted: Tue Oct 28, 2008 8:58 am    Post subject:
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If you're talking COBOL, you can search for a string using subscript, indexes, or reference modification but it's very tedious. Also, COBOL can't do "fuzzy" searches. Can you elaborate a bit on your requirement?
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dick scherrer

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Joined: 23 Nov 2006
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PostPosted: Tue Oct 28, 2008 8:59 am    Post subject:
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Hello,

Quote:
Is it possible to perform a string search to determine absence /presence of a string?
Yes, but it will take a bit of code.

I'd suggest you set up an array that contains the search strings and their lengths.

Then, using reference modification, search the x(40) variable for each entry in the array. If the code moves completely thru the variable and none of the search strings are found, it is a no-hit. If a search string is found, it is a hit and the scanning of the variable should end.

Will the search string be constant or will different strings be used for different executions?
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Escapa

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Joined: 16 Feb 2007
Posts: 1399
Location: IL, USA

PostPosted: Tue Oct 28, 2008 12:17 pm    Post subject:
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Have a look at this thread
http://ibmmainframes.com/viewtopic.php?t=34435&highlight=
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arien

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Joined: 02 Nov 2006
Posts: 43
Location: London

PostPosted: Tue Oct 28, 2008 7:32 pm    Post subject:
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dick scherrer wrote:
Hello,

Yes, but it will take a bit of code.

I'd suggest you set up an array that contains the search strings and their lengths.

Then, using reference modification, search the x(40) variable for each entry in the array. If the code moves completely thru the variable and none of the search strings are found, it is a no-hit. If a search string is found, it is a hit and the scanning of the variable should end.

Will the search string be constant or will different strings be used for different executions?


I think I would have to go for this option and parse it for the 3 different strings -cleardown, clrdwn, cleardwn per reference modification.
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dick scherrer

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PostPosted: Tue Oct 28, 2008 7:58 pm    Post subject:
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Hello,

Good luck icon_smile.gif

Someone will be here if there are questions.
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Marso

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PostPosted: Tue Oct 28, 2008 9:43 pm    Post subject:
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Did I miss something ?
I took my test program and tried the following code:

Code:
    MOVE 'W/O CLEARDOWN AND DOWN' TO CONV-FROM       
    DISPLAY '<' CONV-FROM '>'                         
                                                     
    MOVE 0 TO GLBL-4                                 
    INSPECT CONV-FROM TALLYING GLBL-4 FOR ALL 'CLEAR'
    DISPLAY 'CLEAR tally is ' GLBL-4                 
                                                     
    MOVE 0 TO GLBL-4                                 
    INSPECT CONV-FROM TALLYING GLBL-4 FOR ALL 'CLEAN'
    DISPLAY 'CLEAN tally is ' GLBL-4                 
                                                     
    MOVE 0 TO GLBL-4                                 
    INSPECT CONV-FROM TALLYING GLBL-4 FOR ALL 'DOW'   
    DISPLAY 'DOW   tally is ' GLBL-4                 
                                                     
    MOVE 0 TO GLBL-4                                 
    INSPECT CONV-FROM TALLYING GLBL-4 FOR ALL 'DOM'   
    DISPLAY 'DOM   tally is ' GLBL-4                 

Then I took my test jcl and ran it. The output was:
Code:
<W/O CLEARDOWN AND DOWN
                       
                 >     
CLEAR tally is 0001     
CLEAN tally is 0000     
DOW   tally is 0002     
DOM   tally is 0000     

Is there any reason why INSPECT has not been suggested ???
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dick scherrer

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PostPosted: Tue Oct 28, 2008 10:27 pm    Post subject:
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Hi Marso,

Quote:
Is there any reason why INSPECT has not been suggested ???
In my case, personal preference. Whenever i've had a requirement to search text data for "things", my requirement has always been more than to just identify if the value existed or not.

Also, the first many years i coded such routines, they were written in assembler (before reference modification and using byte-by-byte parsing could dim the lights on the mainframe icon_smile.gif ), so i basically "upgraded" the parse process to cobol and reference modification so that non-assembler programmers could maintain the code after it was implemented.
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