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108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
/*
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* Copyright 2008-2009 Katholieke Universiteit Leuven
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*
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* Use of this software is governed by the MIT license
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*
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* Written by Sven Verdoolaege, K.U.Leuven, Departement
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* Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
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*/
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#include <assert.h>
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#include <isl_map_private.h>
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#include "isl_equalities.h"
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#include <isl_seq.h>
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#include "isl_scan.h"
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#include <isl_mat_private.h>
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#include <isl_vec_private.h>
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/* The input of this program is the same as that of the "polytope_scan"
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* program from the barvinok distribution.
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*
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* Constraints of set is PolyLib format.
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*
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* The input set is assumed to be bounded.
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*/
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struct scan_samples {
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struct isl_scan_callback callback;
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struct isl_mat *samples;
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};
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static isl_stat scan_samples_add_sample(struct isl_scan_callback *cb,
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__isl_take isl_vec *sample)
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{
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struct scan_samples *ss = (struct scan_samples *)cb;
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ss->samples = isl_mat_extend(ss->samples, ss->samples->n_row + 1,
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ss->samples->n_col);
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if (!ss->samples)
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goto error;
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isl_seq_cpy(ss->samples->row[ss->samples->n_row - 1],
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sample->el, sample->size);
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isl_vec_free(sample);
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return isl_stat_ok;
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error:
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isl_vec_free(sample);
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return isl_stat_error;
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}
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static __isl_give isl_mat *isl_basic_set_scan_samples(
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__isl_take isl_basic_set *bset)
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{
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isl_ctx *ctx;
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isl_size dim;
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struct scan_samples ss;
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ctx = isl_basic_set_get_ctx(bset);
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dim = isl_basic_set_dim(bset, isl_dim_all);
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if (dim < 0)
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goto error;
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ss.callback.add = scan_samples_add_sample;
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ss.samples = isl_mat_alloc(ctx, 0, 1 + dim);
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if (!ss.samples)
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goto error;
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if (isl_basic_set_scan(bset, &ss.callback) < 0) {
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isl_mat_free(ss.samples);
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return NULL;
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}
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return ss.samples;
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error:
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isl_basic_set_free(bset);
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return NULL;
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}
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static __isl_give isl_mat *isl_basic_set_samples(__isl_take isl_basic_set *bset)
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{
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struct isl_mat *T;
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struct isl_mat *samples;
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if (!bset)
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return NULL;
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if (bset->n_eq == 0)
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return isl_basic_set_scan_samples(bset);
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bset = isl_basic_set_remove_equalities(bset, &T, NULL);
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samples = isl_basic_set_scan_samples(bset);
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return isl_mat_product(samples, isl_mat_transpose(T));
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}
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int main(int argc, char **argv)
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{
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struct isl_ctx *ctx = isl_ctx_alloc();
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struct isl_basic_set *bset;
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struct isl_mat *samples;
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bset = isl_basic_set_read_from_file(ctx, stdin);
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samples = isl_basic_set_samples(bset);
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isl_mat_print_internal(samples, stdout, 0);
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isl_mat_free(samples);
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isl_ctx_free(ctx);
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return 0;
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}
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