1 /* Variable class implementation (non-inline functions).
2 Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
3 Copyright (C) 2010-2016 BUGSENG srl (http://bugseng.com)
4
5 This file is part of the Parma Polyhedra Library (PPL).
6
7 The PPL is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 3 of the License, or (at your
10 option) any later version.
11
12 The PPL is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software Foundation,
19 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
20
21 For the most up-to-date information see the Parma Polyhedra Library
22 site: http://bugseng.com/products/ppl/ . */
23
24 #include "ppl-config.h"
25 #include "Variable_defs.hh"
26 #include <iostream>
27
28 namespace PPL = Parma_Polyhedra_Library;
29
30 PPL::Variable::output_function_type*
31 PPL::Variable::current_output_function = 0;
32
33 bool
OK() const34 PPL::Variable::OK() const {
35 return id() < max_space_dimension();
36 }
37
38 void
default_output_function(std::ostream & s,const Variable v)39 PPL::Variable::default_output_function(std::ostream& s, const Variable v) {
40 const dimension_type varid = v.id();
41 static const char var_name_letters[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
42 const dimension_type num_letters = sizeof(var_name_letters) - 1;
43 s << var_name_letters[varid % num_letters];
44 if (const dimension_type i = varid / num_letters) {
45 s << i;
46 }
47 }
48
49 /*! \relates Parma_Polyhedra_Library::Variable */
50 std::ostream&
operator <<(std::ostream & s,const Variable v)51 PPL::IO_Operators::operator<<(std::ostream& s, const Variable v) {
52 (*Variable::current_output_function)(s, v);
53 return s;
54 }
55