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
84
85
|
//------------------------------------------------------------------------------
// GxB_Vector_build_Scalar_Vector: build a sparse GraphBLAS vector
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// GxB_Vector_build_Scalar_Vector builds a vector w whose values in its
// sparsity pattern are all equal to a value given by a GrB_Scalar. Unlike the
// GrB_Vector_build_* methods, there is no binary dup operator. Instead, any
// duplicate indices are ignored, which is not an error condition. The I
// GrB_Vector is of size nvals, just like GrB_Vector_build_*.
#include "builder/GB_build.h"
#include "ij/GB_ij.h"
#define GB_FREE_ALL \
if (I_size > 0) GB_FREE_MEMORY (&I, I_size) ;
GrB_Info GxB_Vector_build_Scalar_Vector // build a vector from (I,s) tuples
(
GrB_Vector w, // vector to build
const GrB_Vector I_vector, // row indices
const GrB_Scalar scalar, // value for all tuples
const GrB_Descriptor desc
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_RETURN_IF_NULL (w) ;
GB_RETURN_IF_NULL (scalar) ;
GB_RETURN_IF_NULL (I_vector) ;
GB_RETURN_IF_OUTPUT_IS_READONLY (w) ;
GB_WHERE3 (w, scalar, I_vector,
"GxB_Vector_build_Scalar_Vector (w, I, scalar, desc)") ;
GB_BURBLE_START ("GxB_Vector_build_Scalar_Vector") ;
ASSERT (GB_VECTOR_OK (w)) ;
ASSERT (GB_VECTOR_OK (I_vector)) ;
//--------------------------------------------------------------------------
// finish any pending work
//--------------------------------------------------------------------------
void *I = NULL ;
size_t I_size = 0 ;
GB_MATRIX_WAIT (scalar) ;
if (GB_nnz ((GrB_Matrix) scalar) != 1)
{
GB_ERROR (GrB_EMPTY_OBJECT, "Scalar value is %s", "missing") ;
}
//--------------------------------------------------------------------------
// get the index vector
//--------------------------------------------------------------------------
int64_t ni = 0 ;
GrB_Type I_type = NULL ;
bool need_copy = (w == I_vector) ;
GB_OK (GB_ijxvector (I_vector, need_copy, 0, desc, true,
&I, &ni, &I_size, &I_type, Werk)) ;
bool I_is_32 = (I_type == GrB_UINT32) ;
//--------------------------------------------------------------------------
// build the vector
//--------------------------------------------------------------------------
GB_OK (GB_build ((GrB_Matrix) w, I, NULL, scalar->x, ni,
GxB_IGNORE_DUP, scalar->type,
/* is_matrix: */ false, /* X_iso: */ true,
/* I,J is 32: */ I_is_32, false, Werk)) ;
//--------------------------------------------------------------------------
// free workspace and return result
//--------------------------------------------------------------------------
GB_FREE_ALL ;
GB_BURBLE_END ;
return (GrB_SUCCESS) ;
}
|
