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
43
44
45
46
47
48
49
50
51
52
53
54
/*
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 "long_extras.h"
#include "gr.h"
#include "gr_mat.h"
void
gr_mat_init(gr_mat_t mat, slong rows, slong cols, gr_ctx_t ctx)
{
slong i, sz;
sz = ctx->sizeof_elem;
mat->r = rows;
mat->c = cols;
if (rows != 0)
mat->rows = flint_malloc(rows * sizeof(gr_ptr));
else
mat->rows = NULL;
if (rows != 0 && cols != 0)
{
slong num;
int of;
of = z_mul_checked(&num, rows, cols);
if (of)
flint_throw(FLINT_ERROR, "Overflow creating a %wd x %wd object\n", rows, cols);
mat->entries = flint_malloc(num * sz);
_gr_vec_init(mat->entries, rows * cols, ctx);
for (i = 0; i < rows; i++)
mat->rows[i] = GR_ENTRY(mat->entries, i * cols, sz);
}
else
{
mat->entries = NULL;
for (i = 0; i < rows; i++)
mat->rows[i] = NULL;
}
}