dpoly.h

   1 #ifndef DPOLY_H
   2 #define DPOLY_H
   3
   4 #include <assert.h>
   5 #include <set>
   6 #include <vector>
   7 #include <gmp.h>
   8 #include <NTL/vec_ZZ.h>
   9 #include <barvinok/polylib.h>
  10 #include "conversion.h"
  11
  12 #ifdef NTL_STD_CXX
  13 using namespace NTL;
  14 #endif
  15
  16 class dpoly {
  17 public:
  18     vec_ZZ coeff;
  19     dpoly(int d, ZZ& degree, int offset = 0);
  20     void operator += (const dpoly& t);
  21     void operator *= (const ZZ& f);
  22     void operator *= (dpoly& f);
  23     void div(dpoly& d, mpq_t count, ZZ& sign);
  24     void div(dpoly& d, mpq_t *count, const mpq_t& factor);
  25 private:
  26     mpq_t *div(dpoly &d) const;
  27     void   clear_div(mpq_t *c) const;
  28 };
  29
  30 /* Each element in powers corresponds to a factor of the form (1 - z^b)
  31  * and indicates the exponent of this factor in the denominator.
  32  * The constants b are stored elsewhere (den_r in reducer::reducer).
  33  */
  34 struct dpoly_r_term {
  35     std::vector<int>    powers;
  36     ZZ                  coeff;
  37 };
  38
  39 struct dpoly_r_term_lex_smaller {
  40     bool operator()(const dpoly_r_term* t1, const dpoly_r_term* t2) const {
  41         return t1->powers < t2->powers;
  42     }
  43 };
  44
  45 typedef std::set<dpoly_r_term*, dpoly_r_term_lex_smaller> dpoly_r_term_list;
  46
  47 /* len: number of elements in c
  48  * each element in c is the coefficient of a power of t
  49  * in the MacLaurin expansion
  50  */
  51 struct dpoly_r {
  52     dpoly_r_term_list   *c;
  53     int len;
  54     int dim;
  55     ZZ denom;
  56
  57     void add_term(int i, const std::vector<int>& powers, const ZZ& coeff);
  58     dpoly_r(int len, int dim);
  59     dpoly_r(dpoly& num, int dim);
  60     dpoly_r(dpoly& num, dpoly& den, int pos, int dim);
  61     dpoly_r(const dpoly_r* num, dpoly& den, int pos, int dim);
  62     ~dpoly_r();
  63     dpoly_r *div(const dpoly& d) const;
  64     void dump(void);
  65 };
  66
  67 #endif