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/* Specializations of std::numeric_limits for "checked" types.
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., 51 Franklin Street, Fifth Floor, 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_checked_numeric_limits_hh
#define PPL_checked_numeric_limits_hh 1
#include "Checked_Number.defs.hh"
#include "checked_int.inlines.hh"
#include <limits>
namespace std {
using namespace Parma_Polyhedra_Library;
#define PPL_SPECIALIZE_LIMITS_INT(T) \
/*! \brief Partial specialization of std::numeric_limits. */ \
template <typename Policy> \
class numeric_limits<Checked_Number<T, Policy> > \
: public numeric_limits<T> { \
private: \
typedef Checked_Number<T, Policy> Type; \
\
public: \
static const bool has_infinity = Policy::has_infinity; \
static const bool has_quiet_NaN = Policy::has_nan; \
\
static Type min() { \
Type v; \
v.raw_value() = Checked::Extended_Int<Policy, T>::min; \
return v; \
} \
\
static Type max() { \
Type v; \
v.raw_value() = Checked::Extended_Int<Policy, T>::max; \
return v; \
} \
\
static Type infinity() { \
Type v; \
Checked::assign_special<Policy>(v.raw_value(), VC_PLUS_INFINITY, \
ROUND_IGNORE); \
return v; \
} \
\
static Type quiet_NaN() { \
Type v; \
Checked::assign_special<Policy>(v.raw_value(), VC_NAN, \
ROUND_IGNORE); \
return v; \
} \
};
PPL_SPECIALIZE_LIMITS_INT(char)
PPL_SPECIALIZE_LIMITS_INT(signed char)
PPL_SPECIALIZE_LIMITS_INT(signed short)
PPL_SPECIALIZE_LIMITS_INT(signed int)
PPL_SPECIALIZE_LIMITS_INT(signed long)
PPL_SPECIALIZE_LIMITS_INT(signed long long)
PPL_SPECIALIZE_LIMITS_INT(unsigned char)
PPL_SPECIALIZE_LIMITS_INT(unsigned short)
PPL_SPECIALIZE_LIMITS_INT(unsigned int)
PPL_SPECIALIZE_LIMITS_INT(unsigned long)
PPL_SPECIALIZE_LIMITS_INT(unsigned long long)
#undef PPL_SPECIALIZE_LIMITS_INT
#define PPL_SPECIALIZE_LIMITS_FLOAT(T) \
/*! \brief Partial specialization of std::numeric_limits. */ \
template <typename Policy> \
struct numeric_limits<Checked_Number<T, Policy> > \
: public numeric_limits<T> { \
};
#if PPL_SUPPORTED_FLOAT
PPL_SPECIALIZE_LIMITS_FLOAT(float)
#endif
#if PPL_SUPPORTED_DOUBLE
PPL_SPECIALIZE_LIMITS_FLOAT(double)
#endif
#if PPL_SUPPORTED_LONG_DOUBLE
PPL_SPECIALIZE_LIMITS_FLOAT(long double)
#endif
#undef PPL_SPECIALIZE_LIMITS_FLOAT
#ifdef PPL_DOXYGEN_INCLUDE_IMPLEMENTATION_DETAILS
//! Partial specialization of std::numeric_limits.
#endif // defined(PPL_DOXYGEN_INCLUDE_IMPLEMENTATION_DETAILS)
template <typename Policy>
class
numeric_limits<Checked_Number<mpz_class, Policy> >
: public numeric_limits<mpz_class> {
private:
typedef Checked_Number<mpz_class, Policy> Type;
public:
static const bool has_infinity = Policy::has_infinity;
static const bool has_quiet_NaN = Policy::has_nan;
static Type infinity() {
Type v;
Checked::assign_special<Policy>(v.raw_value(), VC_PLUS_INFINITY,
ROUND_IGNORE);
return v;
}
static Type quiet_NaN() {
Type v;
Checked::assign_special<Policy>(v.raw_value(), VC_NAN, ROUND_IGNORE);
return v;
}
};
#ifdef PPL_DOXYGEN_INCLUDE_IMPLEMENTATION_DETAILS
//! Partial specialization of std::numeric_limits.
#endif // defined(PPL_DOXYGEN_INCLUDE_IMPLEMENTATION_DETAILS)
template <typename Policy>
class
numeric_limits<Checked_Number<mpq_class, Policy> >
: public numeric_limits<mpq_class> {
private:
typedef Checked_Number<mpq_class, Policy> Type;
public:
static const bool has_infinity = Policy::has_infinity;
static const bool has_quiet_NaN = Policy::has_nan;
static Type infinity() {
Type v;
Checked::assign_special<Policy>(v.raw_value(), VC_PLUS_INFINITY,
ROUND_IGNORE);
return v;
}
static Type quiet_NaN() {
Type v;
Checked::assign_special<Policy>(v.raw_value(), VC_NAN, ROUND_IGNORE);
return v;
}
};
} // namespace std
#endif // !defined(PPL_checked_numeric_limits_hh)
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