Shell Programming and Scripting

module xyz (x, y, z, a, b, c);
input x;
input y;
input z;
output a;
output b;
output c;

initial begin
...
end

always ...
...

endmodule

module xyz (x, y, z, a, b, c);
input x;
input y;
input z;
output a;
output b;
output c;

endmodule

egrep "(input|output|module|endmodule)[ \t]" input > output

module xyz (
x,
y,
z,
a,
b,
c
);

module xyz (x, y, z, a, b, c);

module xyz (
x,
y,
z, a, b, c);

input x;
inputy;
output a;
output b;

endmodule

tr '\n;' ' \n' <input | egrep "(input|output|module|endmodule)[ \t]" > output

BEGIN {
  end=".*); *$"
}
/^module/ {
   if ($0 !~ end) {
    printf("%s", $0); m++
   }
   next
}
m {
   if ($0 ~ end)
     {print; m=0}
   else
     printf("%s", $0)
   next
}
1