Add/Insert lines before pattern such that lines to be added have part of the pattern in uppercase

Question

I have to add compiler directives before class declaration like :

`ifndef MIPI_RFFE_SCOREBOARD__SV
`define MIPI_RFFE_SCOREBOARD__SV

class mipi_rffe_scoreboard extends uvm_scoreboard;

I tried :

sed 's/class (\w+)(.*)/\`ifndef \U\1__SV\2/' mipi_rffe_scoreboard.sv

Which gives :

sed: -e expression #1, char 38: invalid reference \2 on `s' command's RHS

I have seen Using sed, Insert a line below (or above) the pattern?. Here Kamal's answer solves only the part of the problem as I need to capture "mipi_rffe_scoreboard" and change it to uppercase

Please take care with your formatting. To highlight a block of code, you can select it and use Ctrl-k, or click the "Code Sample" button. — Tom Fenech, Oct 27 '14 at 18:47
@anubhava I was reluctant to edit as it is unclear whether the "\" and "**" are part of the input. Hopefully Chandan will edit to clarify. — Tom Fenech, Oct 27 '14 at 18:51
I was trying to highlight those with bold font.I am getting `ifndef and `define using sed -i '/pattern/i \ line1 \ line2' inputfile but need the MIPI_RFFE_SCOREBOARD__SV also — Chandan Choudhury, Oct 27 '14 at 18:57
It is not possible to combine formatting with code samples. If you want to draw attention to a specific part, you can mention it in the question. Any characters that are not in your original input should be removed. — Tom Fenech, Oct 27 '14 at 18:59
@anubhava my file has only : class mipi_rffe_scoreboard extends uvm_scoreboard; line at present I need to make it like : `ifndef MIPI_RFFE_SCOREBOARD__SV `define MIPI_RFFE_SCOREBOARD__SV class mipi_rffe_scoreboard extends uvm_scoreboard; — Chandan Choudhury, Oct 27 '14 at 19:08
Did you try the code I suggested? Let me know if you're having any problems with it. — Tom Fenech, Oct 28 '14 at 00:30

Tom Fenech · Accepted Answer · 2014-10-27T19:30:17.167

You could run this perl one-liner on your file:

perl -pe 's/(class (\w+))/`ifndef \U$2\E__SV\n`define \U$2\E__SV\n\n$1/'

It captures lines containing "class" followed by a word and prepends the two lines. \U is used to transform the match to uppercase and \E to end the transformation.

Testing it out:

$ perl -pe 's/(class (\w+))/`ifndef \U$2\E__SV\n`define \U$2\E__SV\n\n$1/'  <<<"class mipi_rffe_scoreboard extends uvm_scoreboard;"
`ifndef MIPI_RFFE_SCOREBOARD__SV
`define MIPI_RFFE_SCOREBOARD__SV

class mipi_rffe_scoreboard extends uvm_scoreboard;

Alternatively (tested on GNU sed, I'm fairly confident that this won't work on other versions):

sed -r 's/class (\w+)/`ifndef \U\1\E__SV\n`define \U\1\E__SV\n\n&/'

-r enables extended regex mode, which allows you to use ( ) to capture patterns. Normally, you would have to escape them using \( \).

Add/Insert lines before pattern such that lines to be added have part of the pattern in uppercase

1 Answers1