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Top Forums Shell Programming and Scripting Perl: Parse Hex file into fields Post 302525139 by morrbie on Wednesday 25th of May 2011 10:56:30 PM
Old 05-25-2011
Lightbulb Perl: Parse Hex file into fields

Hi,

I want to split/parse certain bits of the hex data into another field.

Example:
Input data is
Word1: 4f72abfd
Output:
Parse bits (5 to 0) into field word1data1=0x00cd=205 decimal
Parse bits (7 to 6) into field word1data2=0x000c=12 decimal
etc.
Word2: efff3d02
Parse bits (13 to 3) into field word2data1=0x0f40=3904 decimal
Parse bits (16 to 14) into field word2data2=0x0004=4 decimal
etc.

The bits that are parsed from each input word is different for all 8 input hex words.

I have the following INPUT hex file (input.txt):

# line is a comment
Code:
% 30105 3 5 3 1 1  -- this line is used as a tag
4f72abfd
efff3d02
353b3212
ffff9299
22222222
2299330a
9abe8f12
930d9d2d
# line is a comment
% 30105 3 5 3 1 1  -- this line is used as a tag
3572aaff
820f9283
ffff9299
22222222
2299330a
9abe8f12
930d9d2d

... and so on and so forth

I would like the OUTPUT to look like this (output.txt):

Code:
# line is a comment
% 30105 3 5 3 1 1  -- this line is used as a tag
4f72abfd word1field1=0x00cd=205, word1data2=0x000c=12, word1da#=...
efff3d02 word2field1=0x0f40=3904 , word2data2=0x0004=4, word2da#=...
353b3212 word3field1=..., word3field2=..., etc.
ffff9299 word4field1=..., word4field2=..., etc.
22222222 word5field1=..., word5field2=..., etc.
2299330a word6field1=..., word6field2=..., etc.
9abe8f12 word7field1=..., word7field2=..., etc.
930d9d2d word8field1=..., word8field2=..., etc.
# line is a comment
% 30105 3 5 3 1 1  -- this line is used as a tag
3572aaff word1field1=..., word1data2=..., word1data#=...
820f9283 word2field1=..., word2data2=..., word2data#=...
ffff9299
22222222
2299330a
9abe8f12
930d9d2d word8data1=..., word8data2=..., word8data#=...

... and so on and so forth

Can someone help me write a perl script?

Greatly appreciated!! Thanks.

Last edited by pludi; 05-26-2011 at 03:36 AM..
morrbie
 

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Postfix::Parse::Mailq(3pm)				User Contributed Perl Documentation				Postfix::Parse::Mailq(3pm)

NAME
Postfix::Parse::Mailq - parse the output of the postfix mailq command VERSION
version 1.001 SYNOPSIS
use Postfix::Parse::Mailq; my $mailq_output = `mailq`; my $entries = Postfix::Parse::Mailq->read_string($mailq_output); my $bytes = 0; for my $entry (@$entries) { next unless grep { /@aol.com$/ } @{ $entry->{remaining_rcpts} }; $bytes += $entry->{size}; } print "$bytes bytes remain to send to AOL destinations "; WARNING
This code is really rough and the interface will change. Entries will be objects. There will be some more methods. Still, the basics are likely to keep working, or keep pretty close to what you see here now. METHODS
read_file read_handle read_string my $entries = Postfix::Parse::Mailq->read_string($string, \%arg); This methods read the output of postfix's mailq from a file (by name), a filehandle, or a string, respectively. They return an arrayref of hashrefs, each hashref representing one entry in the queue as reported by mailq. Valid arguments are: spool - a hashref of { queue_id -> spool_name } pairs if given, this will be used to attempt to indicate in which spool messages currently are; it is not entirely reliable (race!) parse_block my $entry = Mailq->parse_block(@lines); Given all the lines in a single entry's block of lines in mailq output, this returns data about the entry. AUTHOR
Ricardo SIGNES <rjbs@cpan.org> COPYRIGHT AND LICENSE
This software is copyright (c) 2008 by Ricardo SIGNES. This is free software; you can redistribute it and/or modify it under the same terms as perl itself. perl v5.10.1 2008-10-23 Postfix::Parse::Mailq(3pm)
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