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