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Scan a file for a string & update a counter on finding.

 
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Ruchi Mittal

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Joined: 15 Oct 2007
Posts: 1
Location: Bangalore

PostPosted: Tue Oct 16, 2007 7:51 pm    Post subject: Scan a file for a string & update a counter on finding.
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I've a file where I need to scan an area (from col x to col y, which is the entire record) looking for "M=?" for each record and then perform certain para based on ? value.

eg.

Code:
----|----|----|----|----|----|----|----|----|----|
RECORD1AAAAAAAAAAAAAAAAAAAM=PAAAAAAAAA
RECORD2BBBBBBBBBBBBBBBBBBBM=RBBBBBBBBB
RECORD3CCCCCCCCCCCCCCCCCM=PCCCCCCCCCCC
RECORD4DDDDDDDDDDDDDDDDDM=GDDDDDDDDDDD
RECORD5DDDDDDDDDDDDDDDDDM=GDDDDDDDDDDD
----|----|----|----|----|----|----|----|----|----|



The literal being searched (M=?) may occur at any position in the entire record.


Thanks all..
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dick scherrer

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Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Tue Oct 16, 2007 11:30 pm    Post subject:
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Hello,

You can do what you want using reference modification.

Define a variable that will be the displacement into the data area (i.e. 77 DSPL PIC 999 COMP-3 VALUE ZEROS.).

Set up a loop that moves the starting position (x) to dspl,
compares the current position to 'M=" (i.e. IF DATAAREA(DSPL:2) = 'M='),
and increments DSPL until end-of-data is reached (y - 2) or 'M=' is found.

If 'M=' is found, use the byte after the "=". If 'M=' is not found, do whatever is appropriate.
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