isl_sample_piplib.c

   1 /*
   2  * Copyright 2008-2009 Katholieke Universiteit Leuven
   3  *
   4  * Use of this software is governed by the MIT license
   5  *
   6  * Written by Sven Verdoolaege, K.U.Leuven, Departement
   7  * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
   8  */
   9
  10 #include <isl/mat.h>
  11 #include <isl/vec.h>
  12 #include <isl/seq.h>
  13 #include "isl_piplib.h"
  14 #include "isl_sample_piplib.h"
  15
  16 struct isl_vec *isl_pip_basic_set_sample(struct isl_basic_set *bset)
  17 {
  18         PipOptions      *options = NULL;
  19         PipMatrix       *domain = NULL;
  20         PipQuast        *sol = NULL;
  21         struct isl_vec *vec = NULL;
  22         unsigned        dim;
  23         struct isl_ctx *ctx;
  24
  25         if (!bset)
  26                 goto error;
  27         ctx = isl_basic_set_get_ctx(bset);
  28         isl_assert(ctx, isl_basic_set_n_param(bset) == 0, goto error);
  29         isl_assert(ctx, isl_basic_set_dim(bset, isl_dim_div) == 0, goto error);
  30         dim = isl_basic_set_n_dim(bset);
  31         domain = isl_basic_map_to_pip((struct isl_basic_map *)bset, 0, 0, 0);
  32         if (!domain)
  33                 goto error;
  34
  35         options = pip_options_init();
  36         if (!options)
  37                 goto error;
  38         sol = pip_solve(domain, NULL, -1, options);
  39         if (!sol)
  40                 goto error;
  41         if (!sol->list)
  42                 vec = isl_vec_alloc(ctx, 0);
  43         else {
  44                 PipList *l;
  45                 int i;
  46                 vec = isl_vec_alloc(ctx, 1 + dim);
  47                 if (!vec)
  48                         goto error;
  49                 isl_int_set_si(vec->block.data[0], 1);
  50                 for (i = 0, l = sol->list; l && i < dim; ++i, l = l->next) {
  51                         isl_seq_cpy_from_pip(&vec->block.data[1+i],
  52                                         &l->vector->the_vector[0], 1);
  53                         isl_assert(ctx, !entier_zero_p(l->vector->the_deno[0]),
  54                                         goto error);
  55                 }
  56                 isl_assert(ctx, i == dim, goto error);
  57         }
  58
  59         pip_quast_free(sol);
  60         pip_options_free(options);
  61         pip_matrix_free(domain);
  62
  63         isl_basic_set_free(bset);
  64         return vec;
  65 error:
  66         isl_vec_free(vec);
  67         isl_basic_set_free(bset);
  68         if (sol)
  69                 pip_quast_free(sol);
  70         if (domain)
  71                 pip_matrix_free(domain);
  72         return NULL;
  73 }