1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
/*
Copyright (C) 2022 Fredrik Johansson
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "gr_vec.h"
#include "gr_mat.h"
int
gr_mat_sub(gr_mat_t res, const gr_mat_t mat1, const gr_mat_t mat2, gr_ctx_t ctx)
{
int status;
slong sz = ctx->sizeof_elem;
slong i, r, c;
r = gr_mat_nrows(res, ctx);
c = gr_mat_ncols(res, ctx);
if (r != gr_mat_nrows(mat1, ctx) ||
c != gr_mat_ncols(mat1, ctx) ||
r != gr_mat_nrows(mat2, ctx) ||
c != gr_mat_ncols(mat2, ctx))
{
return GR_DOMAIN;
}
status = GR_SUCCESS;
for (i = 0; i < r; i++)
{
status |= _gr_vec_sub(GR_MAT_ENTRY(res, i, 0, sz),
GR_MAT_ENTRY(mat1, i, 0, sz),
GR_MAT_ENTRY(mat2, i, 0, sz), c, ctx);
}
return status;
}