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/*
IGraph library.
Copyright (C) 2021 The igraph development team <igraph@igraph.org>
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, see <https://www.gnu.org/licenses/>.
*/
#include <igraph.h>
#include "test_utilities.h"
igraph_integer_t fkeep_none(igraph_integer_t row, igraph_integer_t col, igraph_real_t value, void *other) {
IGRAPH_UNUSED(row);
IGRAPH_UNUSED(col);
IGRAPH_UNUSED(value);
IGRAPH_UNUSED(other);
return 0;
}
igraph_integer_t fkeep(igraph_integer_t row, igraph_integer_t col, igraph_real_t value, void *other) {
if (row == 0 || col == 1 || value > *(int*)other) {
return 0;
}
return 1;
}
int main(void) {
igraph_sparsemat_t spmat;
igraph_sparsemat_t spmat_comp;
int a = 0;
printf("0x0 matrix.\n");
igraph_sparsemat_init(&spmat, 0, 0, /*nzmax*/0);
igraph_sparsemat_compress(&spmat, &spmat_comp);
IGRAPH_ASSERT(igraph_sparsemat_fkeep(&spmat_comp, &fkeep, &a) == IGRAPH_SUCCESS);
igraph_sparsemat_print(&spmat_comp, stdout);
igraph_sparsemat_destroy(&spmat);
igraph_sparsemat_destroy(&spmat_comp);
printf("3x3 matrix.\n");
igraph_sparsemat_init(&spmat, 3, 3, /*nzmax*/7);
igraph_sparsemat_entry(&spmat, 0, 0, 5);
igraph_sparsemat_entry(&spmat, 1, 1, 6);
igraph_sparsemat_entry(&spmat, 2, 2, 7);
igraph_sparsemat_entry(&spmat, 3, 0, 1);
igraph_sparsemat_entry(&spmat, 0, 3, 2);
igraph_sparsemat_entry(&spmat, 2, 1, 3);
igraph_sparsemat_entry(&spmat, 1, 2, 4);
igraph_sparsemat_compress(&spmat, &spmat_comp);
a = 6;
printf("Remove row 0, column 1, and values above 6:\n");
IGRAPH_ASSERT(igraph_sparsemat_fkeep(&spmat_comp, &fkeep, &a) == IGRAPH_SUCCESS);
igraph_sparsemat_print(&spmat_comp, stdout);
printf("Remove everything:\n");
IGRAPH_ASSERT(igraph_sparsemat_fkeep(&spmat_comp, &fkeep_none, &a) == IGRAPH_SUCCESS);
igraph_sparsemat_print(&spmat_comp, stdout);
igraph_sparsemat_destroy(&spmat);
igraph_sparsemat_destroy(&spmat_comp);
VERIFY_FINALLY_STACK();
igraph_set_error_handler(igraph_error_handler_ignore);
printf("uncompressed matrix.\n");
igraph_sparsemat_init(&spmat, 0, 0, /*nzmax*/0);
IGRAPH_ASSERT(igraph_sparsemat_fkeep(&spmat, &fkeep, &a) == IGRAPH_EINVAL);
igraph_sparsemat_destroy(&spmat);
VERIFY_FINALLY_STACK();
return 0;
}
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