int test_function (int a, char b)
{
  /* some code here*/
}

##</code><code>##

my ($prev, $type, $func, $args, $body);
while (<>) {
    if (/^\{/) {
        # maybe check for structs/classes here if necessary
        ($type, $func, $args) = split(' ', $prev, 3);
        $body = '';
    } elsif (/^\}/) {
        # ... process the function here ...
        $func = undef;
    } else {
        if (defined($func)) {
            $body .= $_;
        } else {
            $prev = $_;
        }
    }
}