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
|
//------------------------------------------------------------------------------
// GB_mex_apply_idxunop_user: C = idxunop (A)
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// Apply a user-defined index unary operator to a matrix.
#include "GB_mex.h"
#define USAGE "C = GB_mex_apply_idxunop_user (A)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&C) ; \
GrB_Matrix_free_(&A) ; \
GrB_IndexUnaryOp_free_(&op) ; \
GB_mx_put_global (true) ; \
}
GrB_Matrix C = NULL ;
GrB_Matrix A = NULL ;
GrB_IndexUnaryOp op = NULL ;
void idx2 (int64_t *z, const void *x, uint64_t i, uint64_t j, const void *y) ;
void idx2 (int64_t *z, const void *x, uint64_t i, uint64_t j, const void *y)
{
uint64_t thunk = *((uint64_t *) y) ;
(*z) = i + j + thunk ;
}
//------------------------------------------------------------------------------
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
bool malloc_debug = GB_mx_get_global (true) ;
// check inputs
if (nargout > 1 || nargin != 1)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
// get A (shallow copy)
A = GB_mx_mxArray_to_Matrix (pargin [0], "A input", false, true) ;
if (A == NULL || A->magic != GB_MAGIC)
{
FREE_ALL ;
mexErrMsgTxt ("A failed") ;
}
// create the op
GrB_IndexUnaryOp_new (&op, (GxB_index_unary_function) idx2,
GrB_UINT64, GrB_UINT64, GrB_UINT64) ;
if (op == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("IndexUnaryOp failed") ;
}
// C = op (A), where thunk = 1
uint64_t nrows, ncols ;
GrB_Matrix_nrows (&nrows, A) ;
GrB_Matrix_ncols (&ncols, A) ;
GrB_Matrix_new (&C, GrB_FP64, nrows, ncols) ;
GrB_Matrix_apply_IndexOp_UINT64 (C, NULL, NULL, op, A, 1, NULL) ;
// return C as a struct and free the GraphBLAS C
pargout [0] = GB_mx_Matrix_to_mxArray (&C, "C output", false) ;
FREE_ALL ;
}
|
