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Retrieve Data from a relative location - rexx/utilities

 
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newuser
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Joined: 12 Jun 2003
Posts: 16
Topics: 8
PostPosted: Tue Aug 03, 2004 4:13 pm    Post subject: Retrieve Data from a relative location - rexx/utilities Reply with quote
Hi,
I need to read a file and check if the string '000300002000' is present anywhere in the record. If the string is present, then I need to navigate forward 249 bytes from this(start of 000300002000) position and retrieve 35 bytes at that location.

Suppose, the string '000300002000' is found for one record at 130th offset, then I from 130th offset I need to navigate 249 bytes forward (that is 130+249=) 379th offset. I need to retreive 35 bytes starting from 379th offset and put it into an output file.

Can somebody please share a sample rexx for this

cheers
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moyeenkhan
Beginner


Joined: 04 Dec 2002
Posts: 64
Topics: 21
PostPosted: Tue Aug 03, 2004 5:32 pm    Post subject: Reply with quote
Code:

EXECIO * DISKR ddname (STEM xData. FINIS'
Do I = 1 By 1 Until I=xData.0
 nPos=Pos('000300002000',xData.I)
 If nPos>0 Then Do
  nNewPos=nPos+249
  xNeededData=Substr(xData.I,nNewPos,35)
   Say xNeededData
    End
 End

Hope this helps
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