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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2006-2021 The igraph development team
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include <igraph.h>
#include <stdlib.h>
#include "test_utilities.h"
int main(void) {
igraph_vector_t vector;
igraph_vector_int_t indices;
igraph_real_t values[] = { 87, 23, 8, 82, 94, 56, 36, 33, 76, 66 };
igraph_real_t values2[] = { 87, 23, 8, 82, 94, 56, 36, 33, 76, 66 };
/* Special case: empty vector */
igraph_vector_init(&vector, 0);
igraph_vector_int_init(&indices, 0);
igraph_vector_qsort_ind(&vector, &indices, IGRAPH_ASCENDING);
print_vector_int(&indices);
igraph_vector_int_destroy(&indices);
igraph_vector_destroy(&vector);
/* Non-empty vector, descending */
igraph_vector_view(&vector, values, sizeof(values) / sizeof(values[0]));
igraph_vector_int_init(&indices, 0);
igraph_vector_qsort_ind(&vector, &indices, IGRAPH_DESCENDING);
print_vector_int(&indices);
/* Non-empty vector, ascending */
igraph_vector_view(&vector, values2, sizeof(values2) / sizeof(values2[0]));
igraph_vector_qsort_ind(&vector, &indices, IGRAPH_ASCENDING);
print_vector_int(&indices);
/* Permute the vector by the index vector */
igraph_vector_permute(&vector, &indices);
print_vector(&vector);
/* Print and clean up */
igraph_vector_int_destroy(&indices);
/* Check finalizer stack */
VERIFY_FINALLY_STACK();
return 0;
}
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