/usr/include/libnormaliz/integer.h is in libnormaliz0-dev-common 3.1.1+ds-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Normaliz
* Copyright (C) 2007-2014 Winfried Bruns, Bogdan Ichim, Christof Soeger
* This program 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.
*
* This program 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, see <http://www.gnu.org/licenses/>.
*
* As an exception, when this program is distributed through (i) the App Store
* by Apple Inc.; (ii) the Mac App Store by Apple Inc.; or (iii) Google Play
* by Google Inc., then that store may impose any digital rights management,
* device limits and/or redistribution restrictions that are required by its
* terms of service.
*/
#ifndef INTEGER_H_
#define INTEGER_H_
#include <libnormaliz/general.h>
#include <list>
#include <vector>
#include <string>
#include <limits.h>
// Integer should (may) support:
// Integer abs(Integer); here implemented as Iabs
// Integer min(Integer, Integer); here we use the template min in <algorithm>
// It provides abs, gcd and lcm
//---------------------------------------------------------------------------
namespace libnormaliz {
using namespace std;
//---------------------------------------------------------------------------
// Basic functions
//---------------------------------------------------------------------------
// returns the absolute value of a
template<typename Integer> inline Integer Iabs(const Integer& a) {
return (a>=0) ? (a) : Integer(-a);
}
//returns gcd of a and b, if one is 0 returns the other integer
template<typename Integer> Integer gcd(const Integer& a, const Integer& b);
template<> mpz_class gcd<mpz_class>(const mpz_class& a, const mpz_class& b);
//returns lcm of a and b, returns 0 if one is 0
template<typename Integer> Integer lcm(const Integer& a, const Integer& b);
template<> mpz_class lcm(const mpz_class& a, const mpz_class& b);
// integer division a/b. Returns quot and rem = minimal remainder <= |b|/2
template<typename Integer>
void minimal_remainder(const Integer& a, const Integer&b, Integer& quot, Integer& rem);
// extended Euclidean algorithm: d=ua+vb
template <typename Integer>
Integer ext_gcd(const Integer& a, const Integer& b, Integer& u, Integer&v);
// minimizes u and v and makes d >= 0.
template <typename Integer>
void sign_adjust_and_minimize(const Integer& a, const Integer& b, Integer& d, Integer& u, Integer&v);
//---------------------------------------------------------------------------
// Conversions and checks
//---------------------------------------------------------------------------
// convert val to ret
// does the conversion and returns false if it fails
bool try_convert(long& ret, const long long& val);
inline bool try_convert(long long& ret, const long& val) {ret = val; return true;}
bool try_convert(long& ret, const mpz_class& val);
bool try_convert(long long& ret, const mpz_class& val);
inline bool try_convert(mpz_class& ret, const long& val) {ret = val; return true;}
bool try_convert(mpz_class& ret, const long long& val);
// template for same typ "conversion"
template<typename Type>
inline bool try_convert(Type& ret, const Type& val) {ret = val; return true;}
bool fits_long_range(long long a);
template<typename Integer>
inline bool using_GMP() {
return false;
}
template<>
inline bool using_GMP<mpz_class>() {
return true;
}
template<typename Integer>
Integer int_max_value_dual();
template<typename Integer>
Integer int_max_value_primary();
//---------------------------------------------------------------------------
template<typename Integer>
inline bool check_range(const Integer& m) {
const Integer max_primary = int_max_value_primary<Integer>();
return (Iabs(m) <= max_primary);
}
template<>
inline bool check_range<mpz_class>(const mpz_class& m) {
return true;
}
//---------------------------------------------------------------------------
template<typename Integer>
void check_range_list(const std::list<std::vector<Integer> >& ll);
template<typename Integer> class CandidateList;
template<typename Integer> class Candidate;
template<typename Integer>
void check_range_list(const CandidateList<Integer>& ll);
template<typename Integer>
void check_range_list(const std::list<Candidate<Integer> >& ll);
//---------------------------------------------------------------------------
// Special functions
//---------------------------------------------------------------------------
//return the number of decimals, needed to write the Integer a
template<typename Integer> size_t decimal_length(Integer a);
//returns b!/a!
template<typename Integer> Integer permutations(const size_t& a, const size_t& b);
template<typename Integer> Integer permutations_modulo(const size_t& a, const size_t& b, long m);
//---------------------------------------------------------------------------
// String conversion functions
//---------------------------------------------------------------------------
template<typename Integer> string toString(Integer a);
} // end libnormaliz
//---------------------------------------------------------------------------
#endif /* INTEGER_H_ */
//---------------------------------------------------------------------------
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