dpoly.h

   1 #ifndef DPOLY_H
   2 #define DPOLY_H
   3
   4 #include <barvinok/set.h>
   5 #include <vector>
   6 #include <gmp.h>
   7 #include <NTL/vec_ZZ.h>
   8 #include <barvinok/polylib.h>
   9 #include "conversion.h"
  10
  11 using namespace NTL;
  12
  13 class dpoly {
  14 public:
  15     Vector *coeff;
  16     dpoly(const dpoly& o) {
  17         coeff = Vector_Alloc(o.coeff->Size);
  18         Vector_Copy(o.coeff->p, coeff->p, o.coeff->Size);
  19     }
  20     dpoly(int d) {
  21         coeff = Vector_Alloc(d+1);
  22     }
  23     dpoly(int d, const Value degree, int offset = 0);
  24     ~dpoly() {
  25         Vector_Free(coeff);
  26     }
  27     void operator += (const dpoly& t);
  28     void operator *= (const Value f);
  29     void operator *= (const dpoly& f);
  30     void div(const dpoly& d, mpq_t count, int sign);
  31     void div(const dpoly& d, mpq_t *count, const mpq_t& factor);
  32     Vector *div(const dpoly &d);
  33 };
  34
  35 /* Each element in powers corresponds to a factor of the form (1 - z^b)
  36  * and indicates the exponent of this factor in the denominator.
  37  * The constants b are stored elsewhere (den_r in reducer::reducer).
  38  */
  39 struct dpoly_r_term {
  40     std::vector<int>    powers;
  41     ZZ                  coeff;
  42 };
  43
  44 struct dpoly_r_term_lex_smaller {
  45     bool operator()(const dpoly_r_term* t1, const dpoly_r_term* t2) const {
  46         return t1->powers < t2->powers;
  47     }
  48 };
  49
  50 typedef std::set<dpoly_r_term*, dpoly_r_term_lex_smaller> dpoly_r_term_list;
  51
  52 /* len: number of elements in c
  53  * each element in c is the coefficient of a power of t
  54  * in the MacLaurin expansion
  55  */
  56 struct dpoly_r {
  57     dpoly_r_term_list   *c;
  58     int len;
  59     int dim;
  60     ZZ denom;
  61
  62     void add_term(int i, const std::vector<int>& powers, const ZZ& coeff);
  63     dpoly_r(int len, int dim);
  64     dpoly_r(dpoly& num, int dim);
  65     dpoly_r(dpoly& num, dpoly& den, int pos, int dim);
  66     dpoly_r(const dpoly_r* num, dpoly& den, int pos, int dim);
  67     ~dpoly_r();
  68     dpoly_r *div(const dpoly& d) const;
  69     void dump(void);
  70 };
  71
  72 #endif