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Full Discussion: sort find results
Top Forums UNIX for Dummies Questions & Answers sort find results Post 302599515 by drl on Friday 17th of February 2012 10:44:36 AM
Old 02-17-2012
Hi.

You could use a non-standard collating sequence with a non-standard utility:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate msort custom collating sequence.
# http://billposer.org/Software/msort.html

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
edges() { local _f _n _l;: ${1?"edges: need file"}; _f=$1;_l=$(wc -l $_f);
  head -${_n:=3} $_f ; pe "--- ( $_l: lines total )" ; tail -$_n $_f ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C msort

FILE=${1-data1}

pl " Input data file $FILE:"
cat $FILE

pl " Results, default collating sequence:"
msort -l -q -w $FILE

pl " Results, custom collating sequence:"
msort -l -q -w -s collating-sequence.txt $FILE

pl " Custom: collating-sequence.txt:"
cat collating-sequence.txt

exit 0

producing:
Code:
% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39
msort 8.44

-----
 Input data file data1:
H:\FileList\A\E\F\G\newCppFile.cpp
H:\FileList\header01.h
H:\FileList\B\nextCppFile.cpp

-----
 Results, default collating sequence:
H:\FileList\A\E\F\G\newCppFile.cpp
H:\FileList\B\nextCppFile.cpp
H:\FileList\header01.h

-----
 Results, custom collating sequence:
H:\FileList\header01.h
H:\FileList\A\E\F\G\newCppFile.cpp
H:\FileList\B\nextCppFile.cpp

-----
 Custom: collating-sequence.txt:
a
b
c
d
e
f
g
h
A
B

The msort utility was in the Debian repository. See the web page noted in the script for a PDF of documentation and other details ... cheers, drl

Quote:
"Non-standard" extant tools often: are general, have the
simplest, most appropriate interface, and are convenient
alternatives in the context of equally useful, but
"non-standard", nonce (one-off) awk, perl, ruby scripts.
The knowledge that such tools exist can be of advantage for
solving future similar, but specifically different problems.
( edit 1: minor typo )
Last edited by drl; 02-17-2012 at 05:42 PM..
 

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LEARN ABOUT DEBIAN

cxref-cpp

cxref-cpp(1)						      General Commands Manual						      cxref-cpp(1)

NAME

       cxref-cpp - A modified C preprocessor to use with cxref.

SYNOPSIS

       cxref-cpp ...

DESCRIPTION

       To  improve  the  output  that  is available for the source code for cross-referencing a modified version of the GNU CPP v2.7.2 is supplied
       (named cxref-cpp).

       This modified C preprocessor allows for a finer control over some features of the preprocessing that are not important for a compiler.	In
       a  standard  preprocessor, the preprocessor directives are intended for use only by the preprocessor, so passing the information through is
       not important.

       With cxref-cpp, there are some features that are different to the standard GNU CPP:

	      Compared to gcc versions earlier than version 2.8.0 there is an extra option that will output the #include  lines  from  the  source
	      file.  In version 2.8.0 and later this option is present.

	      Comments	trailing  a  #include  or  a  #define are not preserved by all versions of gcc even if the -C option is used.  This is not
	      important while compiling, but is useful for documenting.

	      The cxref-cpp program will take on the personality of the installed version of gcc so that the gcc header files can be parsed.  This
	      means  that it includes the same default include directory paths and macro definitions.  The file that contains these definitions is
	      called cxref-cpp.defines and is installed by the cxref-cpp-configure program or specified by  the  -cxref-cpp-defines  command  line
	      option.

OPTIONS

       The same as for gcc, apart from '-cxref-cpp-defines' described above.

SEE ALSO

       cxref(1), cxref-cpp-configure(1), gcc(1)

								    May 9, 2004 						      cxref-cpp(1)
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