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/* Octagonal_Shape<T>::Status class implementation: inline functions.
Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
This file is part of the Parma Polyhedra Library (PPL).
The PPL is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The PPL is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.
For the most up-to-date information see the Parma Polyhedra Library
site: http://www.cs.unipr.it/ppl/ . */
#ifndef PPL_Og_Status_inlines_hh
#define PPL_Og_Status_inlines_hh 1
namespace Parma_Polyhedra_Library {
template <typename T>
inline
Octagonal_Shape<T>::Status::Status(flags_t mask)
: flags(mask) {
}
template <typename T>
inline
Octagonal_Shape<T>::Status::Status()
: flags(ZERO_DIM_UNIV) {
}
template <typename T>
inline bool
Octagonal_Shape<T>::Status::test_all(flags_t mask) const {
return (flags & mask) == mask;
}
template <typename T>
inline bool
Octagonal_Shape<T>::Status::test_any(flags_t mask) const {
return flags & mask;
}
template <typename T>
inline void
Octagonal_Shape<T>::Status::set(flags_t mask) {
flags |= mask;
}
template <typename T>
inline void
Octagonal_Shape<T>::Status::reset(flags_t mask) {
flags &= ~mask;
}
template <typename T>
inline bool
Octagonal_Shape<T>::Status::test_zero_dim_univ() const {
return flags == ZERO_DIM_UNIV;
}
template <typename T>
inline void
Octagonal_Shape<T>::Status::reset_zero_dim_univ() {
// This is a no-op if the current status is not zero-dim.
if (flags == ZERO_DIM_UNIV)
// In the zero-dim space, if it is not the universe it is empty.
flags = EMPTY;
}
template <typename T>
inline void
Octagonal_Shape<T>::Status::set_zero_dim_univ() {
// Zero-dim universe is incompatible with anything else.
flags = ZERO_DIM_UNIV;
}
template <typename T>
inline bool
Octagonal_Shape<T>::Status::test_empty() const {
return test_any(EMPTY);
}
template <typename T>
inline void
Octagonal_Shape<T>::Status::reset_empty() {
reset(EMPTY);
}
template <typename T>
inline void
Octagonal_Shape<T>::Status::set_empty() {
flags = EMPTY;
}
template <typename T>
inline bool
Octagonal_Shape<T>::Status::test_strongly_closed() const {
return test_any(STRONGLY_CLOSED);
}
template <typename T>
inline void
Octagonal_Shape<T>::Status::reset_strongly_closed() {
reset(STRONGLY_CLOSED);
}
template <typename T>
inline void
Octagonal_Shape<T>::Status::set_strongly_closed() {
set(STRONGLY_CLOSED);
}
template <typename T>
inline bool
Octagonal_Shape<T>::Status::OK() const {
if (test_zero_dim_univ())
// Zero-dim universe is OK.
return true;
if (test_empty()) {
Status copy = *this;
copy.reset_empty();
if (copy.test_zero_dim_univ())
return true;
else {
#ifndef NDEBUG
std::cerr << "The empty flag is incompatible with any other one."
<< std::endl;
#endif
return false;
}
}
// Any other case is OK.
return true;
}
namespace Implementation {
namespace Octagonal_Shapes {
// These are the keywords that indicate the individual assertions.
const std::string zero_dim_univ = "ZE";
const std::string empty = "EM";
const std::string strong_closed = "SC";
const char yes = '+';
const char no = '-';
const char sep = ' ';
/*! \relates Parma_Polyhedra_Library::Octagonal_Shape<T>::Status
Reads a keyword and its associated on/off flag from \p s.
Returns <CODE>true</CODE> if the operation is successful,
returns <CODE>false</CODE> otherwise.
When successful, \p positive is set to <CODE>true</CODE> if the flag
is on; it is set to <CODE>false</CODE> otherwise.
*/
inline bool
get_field(std::istream& s, const std::string& keyword, bool& positive) {
std::string str;
if (!(s >> str)
|| (str[0] != yes && str[0] != no)
|| str.substr(1) != keyword)
return false;
positive = (str[0] == yes);
return true;
}
} // namespace Octagonal_Shapes
} // namespace Implementation
template <typename T>
inline void
Octagonal_Shape<T>::Status::ascii_dump(std::ostream& s) const {
using namespace Implementation::Octagonal_Shapes;
s << (test_zero_dim_univ() ? yes : no) << zero_dim_univ
<< sep
<< (test_empty() ? yes : no) << empty
<< sep
<< sep
<< (test_strongly_closed() ? yes : no) << strong_closed
<< sep;
}
template <typename T>
inline bool
Octagonal_Shape<T>::Status::ascii_load(std::istream& s) {
using namespace Implementation::Octagonal_Shapes;
PPL_UNINITIALIZED(bool, positive);
if (!get_field(s, zero_dim_univ, positive))
return false;
if (positive)
set_zero_dim_univ();
if (!get_field(s, empty, positive))
return false;
if (positive)
set_empty();
if (!get_field(s, strong_closed, positive))
return false;
if (positive)
set_strongly_closed();
else
reset_strongly_closed();
// Check invariants.
PPL_ASSERT(OK());
return true;
}
} // namespace Parma_Polyhedra_Library
#endif // !defined(PPL_Og_Status_inlines_hh)
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