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Full Discussion: String pattern matching and position
Top Forums UNIX for Dummies Questions & Answers String pattern matching and position Post 302915004 by biowizz on Saturday 30th of August 2014 09:25:40 AM
Old 08-30-2014
@ Scrutinizer: The patterns in the original file are indeed spread over two consecutive lines. That is the reason I merged the two.
I did manage to get an answer for the problem from Jotne and Tom Fenech at stackoverflow.

To count the number of occurrences:

Code:
awk -F"[Tt][Rr]" '{print NF-1}' oneLineInput.txt

To get the position:

Code:
awk -F"[Tt][Rr]" 'BEGIN {print "hit\tposition"} {for (i=1;i<NF;i++) {p+=length($i);print ++a"\t"p+1+(a-1)*2}}' oneLineInput.txt

Another approach:

Code:
{ 
    while (match($0, /[Tt][Rr]/)) {
        ++n
        m += RSTART
        $0 = substr($0, RSTART + RLENGTH)
        printf "match %d: position %d\n", n, m + n - 1
    }
}

Code:
awk -f matches.awk file

Thank you trying to help me.

@ Don Cragun: perfect explanation for why the script I tried did not work.

Amazed by the capabilities of what scripting can do.
 

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LEARN ABOUT LINUX

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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