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Full Discussion: How to replace character in a file based on another file.?
Top Forums Shell Programming and Scripting How to replace character in a file based on another file.? Post 302826501 by Yoda on Wednesday 26th of June 2013 05:04:39 PM
Old 06-26-2013
Here is an awk approach:
Code:
awk '
        NR == FNR {
                if ( NF == 3 )
                        A[++c] = $1 "," $2 "," $3
                if ( NF == 2 )
                        A[++c] = $1 "," $2
                next
        }
        {
                R = $0
                for ( i = 1; i <= c; i++ )
                {
                        n = split ( A[i], V, "," )
                        s = V[1]
                        e = V[2]
                        if ( n == 3 )
                        {
                                if ( V[n] == "r" )
                                {
                                        while ( s <= e )
                                        {
                                                k = k ? k "x" : "x"
                                                s++
                                        }
                                        T = sprintf("%s",substr(R,1,V[1]-1))
                                        T = sprintf("%s%s",T,k)
                                        T = sprintf("%s%s",T,substr(R,V[2]+1))
                                }
                                R = T ? T : R
                                T = ""
                                k = ""
                        }
                }
                print R
        }
' inst file

Input
Code:
$ cat inst
1   9    o
10  15   r
16  20   o
21  30   r
31

$ cat file
0000000010000233154825032720204abc  BC15
0000000010000233154825032720204defg DB15

Output
Code:
$ ./ken.awk
000000001xxxxxx31548xxxxxxxxxx4abc  BC15
000000001xxxxxx31548xxxxxxxxxx4defg DB15

Note: I haven't added the logic for handling 2 column instruction file. I hope you can work on that.
This User Gave Thanks to Yoda For This Post:
ken6503
 

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LEARN ABOUT REDHAT

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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