Voneline is a simple pipe filter which takes Verilog structural netlists from stdin. It changes the input's whitespace to have a single instantiation per line, and outputs the result. This compresses the file, and makes it easy to grep for instantiations.

For sources, see https://www.veripool.org/voneline.

With the following Verilog input:

`define foo bar
module test;
   input a,b,c,
     d,
     e,
     f;
   cell1
     cell1
       (
    .a(a), .b(b),
    .c(c));
   cell2 cell2 (.a(a));
   cell3 cell3 (.a(a));
    endmodule

Voneline produces:

`define foo bar
module test;
input a,b,c, d, e, f;
cell1 cell1 ( .a(a), .b(b), .c(c));
cell2 cell2 (.a(a));
cell3 cell3 (.a(a)); 
endmodule

It's now easier to find or remove a cell with a "grep cell1".

# Prerequisites
sudo apt-get install flex
# Obtain distribution kit
git clone https://github.com/veripool/voneline.git
# Build
cd voneline
git pull
autoconf
./configure
make
make test
make install

See man voneline after installation.

This package is Copyright 1998-2019 by Wilson Snyder <wsnyder@wsnyder.org>.

This program is free software; you can redistribute it and/or modify it under the terms of either the GNU General Public License or the Perl Artistic License. This code is provided with no warranty of any kind, and is used entirely at your own risk.