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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
//------------------------------------------------------------------------------
// GB_Iterator_attach: attach an iterator to matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB.h"
#define GB_FREE_ALL ;
GrB_Info GB_Iterator_attach
(
// input/output:
GxB_Iterator iterator, // iterator to attach to the matrix A
// input
GrB_Matrix A, // matrix to attach
GxB_Format_Value format, // by row, by col, or by entry (GxB_NO_FORMAT)
GrB_Descriptor desc
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_RETURN_IF_NULL (iterator) ;
GB_RETURN_IF_NULL_OR_FAULTY (A) ;
if ((format == GxB_BY_ROW && A->is_csc) ||
(format == GxB_BY_COL && !A->is_csc))
{
return (GrB_NOT_IMPLEMENTED) ;
}
//--------------------------------------------------------------------------
// finish any pending work on the matrix
//--------------------------------------------------------------------------
if (GB_ANY_PENDING_WORK (A))
{
GrB_Info info ;
GB_CONTEXT ("GxB_Iterator_attach") ;
if (desc != NULL)
{
// get the # of threads to use
Context->nthreads_max = desc->nthreads_max ;
Context->chunk = desc->chunk ;
}
GB_OK (GB_wait (A, "A", Context)) ;
}
//--------------------------------------------------------------------------
// clear the current position
//--------------------------------------------------------------------------
iterator->pstart = 0 ;
iterator->pend = 0 ;
iterator->p = 0 ;
iterator->k = 0 ;
//--------------------------------------------------------------------------
// get the matrix and save its contents in the iterator
//--------------------------------------------------------------------------
iterator->pmax = (GB_nnz (A) == 0) ? 0 : GB_nnz_held (A) ;
iterator->avlen = A->vlen ;
iterator->avdim = A->vdim ;
iterator->anvec = A->nvec ;
iterator->Ap = A->p ;
iterator->Ah = A->h ;
iterator->Ab = A->b ;
iterator->Ai = A->i ;
iterator->Ax = A->x ;
iterator->type_size = A->type->size ;
iterator->A_sparsity = GB_sparsity (A) ;
iterator->iso = A->iso ;
iterator->by_col = A->is_csc ;
return (GrB_SUCCESS) ;
}
|
