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Full Discussion: Hopefully a simple script, bash or perl...
Top Forums Shell Programming and Scripting Hopefully a simple script, bash or perl... Post 302486005 by CudaPrime on Thursday 6th of January 2011 04:40:56 PM
Old 01-06-2011
Hopefully a simple script, bash or perl...
I'm attempting to parse a file whose contents follow this format;
Code:
4:/eula.1028.txt:
  8:/eula.1031.txt:
  19:/eula.1033.txt:
  23:/eula.1036.txt:
  27:/eula.1040.txt:
  31:/eula.1041.txt:
  35:/eula.1042.txt:
  39:/eula.2052.txt:
  43:/eula.3082.txt:

The number of lines of the file will vary but the format is constant; #:TEXT:

What I would like is for the script to subtract the numerical variables of a line (starting with line 1 and 2) from the line above it, -3 then associate that new value with the above TEXT and output the results to a new file. An example of the formula I have in mind would be expressed something like this;

Line #2 = 8
Line #1 = 4
So; (8 - 4) = 4 - 3 = 1

THEN

Line #3 = 19
Line #2 = 8
So; (19 - 8) = 11 - 3 = 8

And so on until it reaches the end of the file.

For example, the results of the new file should look like this;
Code:
1:/eula.1028.txt:
  8:/eula.1031.txt:
1:/eula.1033.txt:
  1:/eula.1036.txt:
  1:/eula.1040.txt:
1:/eula.1041.txt:
  1:/eula.1042.txt:
  1:/eula.2052.txt:

Line 43:/eula.3082.txt: would not be able to be figured as there is no following line to subtract from and the script should end.

I've been attempting to utilize bash, awk, sed, to get this done but it's just eluding me. I'm not a perl programmer at all but I suspect there is likely a simple way to perform this function in perl, but in bash I keep chasing my tail.

Thanks in advance for any help on this one!
Last edited by Franklin52; 01-07-2011 at 03:29 AM.. Reason: Please use code tags.
 

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LEARN ABOUT CENTOS

gensprep

gensprep(8)							 ICU 50.1.2 Manual						       gensprep(8)

NAME

       gensprep - compile StringPrep data from files filtered by filterRFC3454.pl

SYNOPSIS

       gensprep [ -h, -?, --help ] [ -v, --verbose ] [ -c, --copyright ] [ -s, --sourcedir source ] [ -d, --destdir destination ]

DESCRIPTION

       gensprep reads filtered RFC 3454 files and compiles their information into a binary form.  The resulting file, <name>.icu, can then be read
       directly by ICU, or used by pkgdata(8) for incorporation into a larger archive or library.

       The files read by gensprep are described in the FILES section.

OPTIONS

       -h, -?, --help
	      Print help about usage and exit.

       -v, --verbose
	      Display extra informative messages during execution.

       -c, --copyright
	      Include a copyright notice into the binary data.

       -s, --sourcedir source
	      Set the source directory to source.  The default source directory is specified by the environment variable ICU_DATA.

       -d, --destdir destination
	      Set the destination directory to destination.  The default destination directory is specified by the environment variable ICU_DATA.

ENVIRONMENT

       ICU_DATA  Specifies the directory containing ICU data. Defaults to /usr/share/icu/50.1.2/.  Some tools in ICU depend on the presence of the
		 trailing slash. It is thus important to make sure that it is present if ICU_DATA is set.

FILES

       The  following files are read by gensprep and are looked for in the source /misc for rfc3454_*.txt files and in source /unidata for Normal-
       izationCorrections.txt.

       rfc3453_A_1.txt	   Contains the list of unassigned codepoints in Unicode version 3.2.0....

       rfc3454_B_1.txt	   Contains the list of code points that are commonly mapped to nothing....

       rfc3454_B_2.txt	   Contains the list of mappings for casefolding of  code points when Normalization form NFKC is specified....

       rfc3454_C_X.txt	   Contains the list of code points that are prohibited for IDNA.

       NormalizationCorrections.txt
			   Contains the list of code points whose normalization has changed since Unicode Version 3.2.0.

VERSION

       50.1.2

COPYRIGHT

       Copyright (C) 2000-2002 IBM, Inc. and others.

SEE ALSO

       pkgdata(8)

ICU MANPAGE
							   18 March 2003						       gensprep(8)
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