[SOLVED] Reading and writing in Shell

Issue

I am trying to do a very basic operation in Shell. I have the following file:

id DiaMatch(32) = Sector(C26, 9, 1021) * Shift(k2, k2-p1, [], k3, -k3, [], k1, p1-k1, []);
id DiaMatch(33) = Sector(C26, 9, 1021) * Shift(k2, k2-p1, [], k3, -k3, [], k1, p1-k1, []);
id DiaMatch(34) = Sector(C10, 9, 1022) * Shift(k2, -p1+k1, [], k3, -k3, [], k1, p1-k2, []);
id DiaMatch(35) = Sector(C10, 9, 1022) * Shift(k2, -p1+k1, [], k3, -k3, [], k1, p1-k2, []);

and so on.

I have to extract from this file to a new file with the following:

file C26;
replace_(k2, k2-p1, k3, -k3, k1, p1-k1);
end;

file C26;
replace_(k2, k2-p1, k3, -k3, k1, p1-k1);
end;

file C10;
replace_(k2, -p1+k1, k3, -k3, k1, p1-k2);
end;

and so on

I am trying to do this operation line by line as

while read line; do
    sed -n '/shift/{s/.*\[\(.*\)\].*/\1/;s/\[//g;s/\]//g;p}'
    echo $line
done < qqbz.match.info.inc

but this is not working. Any idea is appreciated.

Solution

Shell is for launching commands, you could but shouldn't use it for anything much more complicated than that. Awk is not shell, you could use for example it. I left some for exercise (add %ss and $ns in the printf):

$ awk -F"[()]" '{
     split($4,a,/, /)
     split($6,b,/, /)
     printf "file %s;\nreplace(%s, %s, ...);\nend;\n\n",a[1],b[1],b[2]
}' file

Output:

file C26;
replace(k2, k2-p1, ...);
end;

file C26;
replace(k2, k2-p1, ...);
end;

file C10;
replace(k2, -p1+k1, ...);
end;

file C10;
replace(k2, -p1+k1, ...);
end;

Answered By - James Brown

Answer Checked By - Timothy Miller (WPSolving Admin)