On Tue, Jun 21, 2005 at 09:57:07PM -0400, kamaraju kusumanchi wrote: > I have a large text file (humongous.txt) with the following structure
One more Perl script to add to the mix, below. It's perhaps
paranoid and verbose in its error reporting, but I hope it
helps you to write your own scripts. You run it as
scriptname.pl humongous.txt
Let me know if it's unclear.
#!/usr/bin/perl
use strict;
use warnings;
my @thisFileLines = ();
my $filename = '';
my $thisFilename = '';
my $suffix = '.txt'; #suffix to append to filenames.
while(<>) {
if( /^date\s+(\d+-\d+-\d+)$/ ) {
$thisFilename = $1;
if( @thisFileLines ) { # are lines from another file waiting
to be written?
if( &saveFile( $filename, @thisFileLines ) ) { # if
so, write them
# We've now saved the file; empty the buffer
and start
# a new one so that we can move on to this file.
@thisFileLines = ($_);
}
else {
print STDERR "Failed to save $filename\n";
}
}
else { # no lines waiting to be written
push @thisFileLines, $_;
}
$filename = $thisFilename . $suffix;
}
else { # Not a line beginning with 'date'
push @thisFileLines, $_;
}
}
# Handle any leftover files to be saved -- those that
# aren't followed by a '^date' line.
&saveFile( $filename, @thisFileLines )
or print STDERR "Failed to save $filename\n";
sub saveFile {
my $filename = shift;
if( open( OUTFILE, ">$filename" ) ) {
print OUTFILE @_;
if( !close OUTFILE ) {
return 0;
}
}
else {
print STDERR "Could not open $filename for writing.\n";
return 0;
}
return 1;
}
--
Stephen R. Laniel
[EMAIL PROTECTED]
+(617) 308-5571
http://laniels.org/
PGP key: http://laniels.org/slaniel.key
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