dpoly.h

   1 #ifndef DPOLY_H
   2 #define DPOLY_H
   3
   4 #include <assert.h>
   5 #include <barvinok/set.h>
   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     Vector *coeff;
  19     dpoly(const dpoly& o) {
  20         coeff = Vector_Alloc(o.coeff->Size);
  21         Vector_Copy(o.coeff->p, coeff->p, o.coeff->Size);
  22     }
  23     dpoly(int d) {
  24         coeff = Vector_Alloc(d+1);
  25     }
  26     dpoly(int d, const Value degree, int offset = 0);
  27     ~dpoly() {
  28         Vector_Free(coeff);
  29     }
  30     void operator += (const dpoly& t);
  31     void operator *= (const Value f);
  32     void operator *= (const dpoly& f);
  33     void div(const dpoly& d, mpq_t count, ZZ& sign);
  34     void div(const dpoly& d, mpq_t *count, const mpq_t& factor);
  35     Vector *div(const dpoly &d);
  36 };
  37
  38 /* Each element in powers corresponds to a factor of the form (1 - z^b)
  39  * and indicates the exponent of this factor in the denominator.
  40  * The constants b are stored elsewhere (den_r in reducer::reducer).
  41  */
  42 struct dpoly_r_term {
  43     std::vector<int>    powers;
  44     ZZ                  coeff;
  45 };
  46
  47 struct dpoly_r_term_lex_smaller {
  48     bool operator()(const dpoly_r_term* t1, const dpoly_r_term* t2) const {
  49         return t1->powers < t2->powers;
  50     }
  51 };
  52
  53 typedef std::set<dpoly_r_term*, dpoly_r_term_lex_smaller> dpoly_r_term_list;
  54
  55 /* len: number of elements in c
  56  * each element in c is the coefficient of a power of t
  57  * in the MacLaurin expansion
  58  */
  59 struct dpoly_r {
  60     dpoly_r_term_list   *c;
  61     int len;
  62     int dim;
  63     ZZ denom;
  64
  65     void add_term(int i, const std::vector<int>& powers, const ZZ& coeff);
  66     dpoly_r(int len, int dim);
  67     dpoly_r(dpoly& num, int dim);
  68     dpoly_r(dpoly& num, dpoly& den, int pos, int dim);
  69     dpoly_r(const dpoly_r* num, dpoly& den, int pos, int dim);
  70     ~dpoly_r();
  71     dpoly_r *div(const dpoly& d) const;
  72     void dump(void);
  73 };
  74
  75 #endif