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Dos Batch Program to Parse Text File

Posted on 2008-10-23
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Last Modified: 2008-10-24
I need to write a batch program that will scan a text file and write out the first 5000 lines that contain "000000000000".  The file contans around 14 million rows.
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Question by:ddpleasant
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Accepted Solution

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Shift-3 earned 500 total points
ID: 22789252
Paste the script below into a text file with a .cmd extension.  Customize the value of the file variable with the location of the text file.  Running the script will echo the first 5000 matching lines to the file specified in the output variable.

I've only been able to test this with a 100,000-line file.  It's quite possible that it will choke on one that's 14 million lines.  Special characters such as angle brackets, pipes, and ampersands will also give it trouble.


@echo off
setlocal enabledelayedexpansion
 
set file=c:\file.txt
set output=output.txt
set maxlines=5000
 
set count=0
 
for /F "tokens=* usebackq" %%G in ("%file%") do (
 if !count!==%maxlines% goto :eof
 
 set line=%%G
 set line=!line:*000000000000=--FOUND--!
 if "!line:~0,9!"=="--FOUND--" (
  echo %%G>>"%output%"
  set /a count+=1
 )
)

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Author Comment

by:ddpleasant
ID: 22789340
You were right about it choking.  I received a mesage that stated not enough storage is available to process this command.

Thank you for the help though.
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