bfcounter.h

   1 #include <vector>
   2 #include <gmp.h>
   3 extern "C" {
   4 #include <polylib/polylibgmp.h>
   5 }
   6 #include <barvinok/NTL_QQ.h>
   7 #include "reducer.h"
   8
   9 struct bfc_term_base {
  10     // the number of times a given factor appears in the denominator
  11     int     *powers;
  12     mat_ZZ   terms;
  13
  14     bfc_term_base(int len) {
  15         powers = new int[len];
  16     }
  17
  18     virtual ~bfc_term_base() {
  19         delete [] powers;
  20     }
  21 };
  22
  23 struct bfc_term : public bfc_term_base {
  24     vec_QQ   c;
  25
  26     bfc_term(int len) : bfc_term_base(len) {}
  27 };
  28
  29 typedef std::vector< bfc_term_base * > bfc_vec;
  30
  31 struct bf_reducer;
  32
  33 struct bf_base : public np_base {
  34     ZZ one;
  35     mpq_t tcount;
  36     mpz_t tn;
  37     mpz_t td;
  38     int lower;      // call base when only this many variables is left
  39
  40     bf_base(unsigned dim) : np_base(dim) {
  41         mpq_init(tcount);
  42         mpz_init(tn);
  43         mpz_init(td);
  44         one = 1;
  45     }
  46
  47     ~bf_base() {
  48         mpq_clear(tcount);
  49         mpz_clear(tn);
  50         mpz_clear(td);
  51     }
  52
  53     virtual void handle_polar(Polyhedron *C, Value *vertex, QQ c);
  54     int setup_factors(Polyhedron *P, mat_ZZ& factors, bfc_term_base* t, int s);
  55
  56     bfc_term_base* find_bfc_term(bfc_vec& v, int *powers, int len);
  57     void add_term(bfc_term_base *t, vec_ZZ& num1, vec_ZZ& num);
  58     void add_term(bfc_term_base *t, vec_ZZ& num);
  59
  60     void reduce(mat_ZZ& factors, bfc_vec& v);
  61     virtual void base(mat_ZZ& factors, bfc_vec& v) = 0;
  62
  63     virtual bfc_term_base* new_bf_term(int len) = 0;
  64     virtual void set_factor(bfc_term_base *t, int k, int change) = 0;
  65     virtual void set_factor(bfc_term_base *t, int k, mpq_t &f, int change) = 0;
  66     virtual void set_factor(bfc_term_base *t, int k, const QQ& c, int change) = 0;
  67     virtual void update_term(bfc_term_base *t, int i) = 0;
  68     virtual void insert_term(bfc_term_base *t, int i) = 0;
  69     virtual bool constant_vertex(int dim) = 0;
  70     virtual void cum(bf_reducer *bfr, bfc_term_base *t, int k,
  71                      dpoly_r *r) = 0;
  72 };
  73
  74 struct bfcounter_base : public bf_base {
  75     QQ c;
  76
  77     bfcounter_base(unsigned dim) : bf_base(dim) {
  78     }
  79
  80     bfc_term_base* new_bf_term(int len);
  81
  82     virtual void set_factor(bfc_term_base *t, int k, int change);
  83     virtual void set_factor(bfc_term_base *t, int k, mpq_t &f, int change);
  84     virtual void set_factor(bfc_term_base *t, int k, const QQ& c_factor, int change);
  85     virtual void insert_term(bfc_term_base *t, int i);
  86     virtual void update_term(bfc_term_base *t, int i);
  87
  88     virtual bool constant_vertex(int dim) { return true; }
  89     virtual void cum(bf_reducer *bfr, bfc_term_base *t, int k, dpoly_r *r) {
  90         assert(0);
  91     }
  92 };
  93
  94 struct bf_reducer {
  95     mat_ZZ& factors;
  96     bfc_vec& v;
  97     bf_base *bf;
  98
  99     unsigned nf;
 100     unsigned d;
 101
 102     mat_ZZ nfactors;
 103     int *old2new;
 104     int *sign;
 105     unsigned int nnf;
 106     bfc_vec vn;
 107
 108     vec_ZZ extra_num;
 109     int changes;
 110     int no_param;           // r from text
 111     int only_param;         // k-r-s from text
 112     int total_power;        // k from text
 113
 114     // created in compute_reduced_factors
 115     int *bpowers;
 116     // set in update_powers
 117     int *npowers;
 118     vec_ZZ l_extra_num;
 119     int l_changes;
 120
 121     bf_reducer(mat_ZZ& factors, bfc_vec& v, bf_base *bf)
 122             : factors(factors), v(v), bf(bf) {
 123         nf = factors.NumRows();
 124         d = factors.NumCols();
 125         old2new = new int[nf];
 126         sign = new int[nf];
 127
 128         extra_num.SetLength(d-1);
 129     }
 130     ~bf_reducer() {
 131         delete [] old2new;
 132         delete [] sign;
 133         delete [] npowers;
 134         delete [] bpowers;
 135     }
 136
 137     void compute_reduced_factors();
 138     void compute_extra_num(int i);
 139
 140     void reduce();
 141
 142     void update_powers(int *powers, int len);
 143 };