/usr/include/ginac/power.h is in libginac-dev 1.7.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | /** @file power.h
*
* Interface to GiNaC's symbolic exponentiation (basis^exponent). */
/*
* GiNaC Copyright (C) 1999-2018 Johannes Gutenberg University Mainz, Germany
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef GINAC_POWER_H
#define GINAC_POWER_H
#include "basic.h"
#include "ex.h"
#include "archive.h"
namespace GiNaC {
class numeric;
class add;
class mul;
/** This class holds a two-component object, a basis and and exponent
* representing exponentiation. */
class power : public basic
{
GINAC_DECLARE_REGISTERED_CLASS(power, basic)
friend class mul;
// member functions
// other constructors
public:
power(const ex & lh, const ex & rh) : basis(lh), exponent(rh) {}
template<typename T> power(const ex & lh, const T & rh) : basis(lh), exponent(rh) {}
// functions overriding virtual functions from base classes
public:
unsigned precedence() const override {return 60;}
bool info(unsigned inf) const override;
size_t nops() const override;
ex op(size_t i) const override;
ex map(map_function & f) const override;
bool is_polynomial(const ex & var) const override;
int degree(const ex & s) const override;
int ldegree(const ex & s) const override;
ex coeff(const ex & s, int n = 1) const override;
ex eval() const override;
ex evalf() const override;
ex evalm() const override;
ex series(const relational & s, int order, unsigned options = 0) const override;
ex subs(const exmap & m, unsigned options = 0) const override;
bool has(const ex & other, unsigned options = 0) const override;
ex normal(exmap & repl, exmap & rev_lookup) const override;
ex to_rational(exmap & repl) const override;
ex to_polynomial(exmap & repl) const override;
ex conjugate() const override;
ex real_part() const override;
ex imag_part() const override;
/** Save (a.k.a. serialize) object into archive. */
void archive(archive_node& n) const override;
/** Read (a.k.a. deserialize) object from archive. */
void read_archive(const archive_node& n, lst& syms) override;
protected:
ex derivative(const symbol & s) const override;
ex eval_ncmul(const exvector & v) const override;
unsigned return_type() const override;
return_type_t return_type_tinfo() const override;
ex expand(unsigned options = 0) const override;
// new virtual functions which can be overridden by derived classes
// none
// non-virtual functions in this class
protected:
void print_power(const print_context & c, const char *powersymbol, const char *openbrace, const char *closebrace, unsigned level) const;
void do_print_dflt(const print_dflt & c, unsigned level) const;
void do_print_latex(const print_latex & c, unsigned level) const;
void do_print_csrc(const print_csrc & c, unsigned level) const;
void do_print_python(const print_python & c, unsigned level) const;
void do_print_python_repr(const print_python_repr & c, unsigned level) const;
void do_print_csrc_cl_N(const print_csrc_cl_N & c, unsigned level) const;
static ex expand_add(const add & a, long n, unsigned options);
static ex expand_add_2(const add & a, unsigned options);
static ex expand_mul(const mul & m, const numeric & n, unsigned options, bool from_expand = false);
// member variables
protected:
ex basis;
ex exponent;
};
GINAC_DECLARE_UNARCHIVER(power);
// wrapper functions
/** Symbolic exponentiation. Returns a power-object as a new expression.
*
* @param b the basis expression
* @param e the exponent expression */
inline ex pow(const ex & b, const ex & e)
{
return dynallocate<power>(b, e);
}
template<typename T1, typename T2>
inline ex pow(const T1 & b, const T2 & e)
{
return dynallocate<power>(ex(b), ex(e));
}
/** Square root expression. Returns a power-object with exponent 1/2. */
inline ex sqrt(const ex & a)
{
extern const ex _ex1_2;
return power(a,_ex1_2);
}
} // namespace GiNaC
#endif // ndef GINAC_POWER_H
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