1/* Strip domain part from an email address.
2   Copyright (C) 2006, 2007, 2008, 2009, 2010 Jan Rafaj
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 3, or (at your option)
7   any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
16
17module 'strip_domain_part'.
18#pragma regex push +extended
19
20func strip_domain_part(string domain, number n)
21  returns string
22do
23  if n = 0
24    return domainpart(domain)
25  elif domainpart(domain) matches '.*((\.[^.]+){' . n . '})'
26    return substring(\1, 1, -1)
27  else
28    return domain
29  fi
30done
31
32#pragma regex pop
33