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
|
//------------------------------------------------------------------------------
// GB_nnz.c: number of entries in a matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// GB_nnz (A) for any matrix: includes zombies for hypersparse and sparse,
// but excluding entries flagged as not present in a bitmap. Pending tuples
// are ignored; to count them, use GB_wait first. A may be NULL.
#include "GB.h"
int64_t GB_nnz // return nnz(A) or INT64_MAX if integer overflow
(
GrB_Matrix A
)
{
if (A == NULL || A->magic != GB_MAGIC || A->x == NULL)
{
// A is NULL or uninitialized
return (0) ;
}
else if (A->p != NULL)
{
// A is sparse or hypersparse
return (A->nvals) ;
}
else if (A->b != NULL)
{
// A is bitmap
return (A->nvals) ;
}
else
{
// A is full
return (GB_nnz_full (A)) ;
}
}
|
