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//------------------------------------------------------------------------------
// GB_nnz_template.c: number of entries in a matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, 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.
#ifdef GB_CUDA_KERNEL
__device__ static inline
#endif
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
ASSERT (A->nvals == A->p [A->nvec]) ;
return (A->nvals) ;
}
else if (A->b != NULL)
{
// A is bitmap
return (A->nvals) ;
}
else
{
// A is full
return (GB_nnz_full (A)) ;
}
}
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