SystemVerilog: how to extract parts of a string - verilog

On Wed, 16 Apr 2008 15:23:28 -0700 (PDT), philip.chen@gmail.com wrote:

>If I have a string:
>
>string s = "top.block_name.subblock_name";
>
>and I want to extract the block_name from the string, how would I do
>it?
>
>I know there's a substr function
>
>s.substr()
>
>but there's no find() function to locate the . (dot) separator.

You can always write your own find function:

function int find(int offset, string s);
int i;
for (i = offset; i < s.len(); i=i+1)
if (s.getc(i) == '.')
find = i;
return;
endfunction

and use it as following:

int firstdot = find(0,s)+1;
int nextdot = find(firstdot,s);
string blockname = s.substr(firstdot, nextdot);

Standard disclaimer: this is non-tested code which means most probably
it won't even compile at first try. Making it work is left as an
exercise for the reader.