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//------------------------------------------------------------------------------
// GB_mex_extractTuples: extract all tuples from a matrix or vector
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_mex.h"
#define USAGE "[I,J,X] = GB_mex_extractTuples (A, xtype, method)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&A) ; \
GrB_Vector_free_(&I_vector) ; \
GrB_Vector_free_(&J_vector) ; \
GrB_Vector_free_(&X_vector) ; \
GB_mx_put_global (true) ; \
}
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
bool malloc_debug = GB_mx_get_global (true) ;
GrB_Matrix A = NULL ;
GrB_Vector I_vector = NULL, J_vector = NULL, X_vector = NULL ;
void *I_output = NULL, *J_output = NULL ;
GB_void *X = NULL ;
GrB_Type xtype = NULL ;
uint64_t nvals = 0 ;
// check inputs
if (nargout > 3 || nargin < 1 || nargin > 3)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
#define GET_DEEP_COPY ;
#define FREE_DEEP_COPY ;
// get A (shallow copy)
A = GB_mx_mxArray_to_Matrix (pargin [0], "A input", false, true) ;
if (A == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("A failed") ;
}
// get the number of entries in A
GrB_Matrix_nvals (&nvals, A) ;
// get the method: 0: use (uint64_t *), 1: use GrB_Vector for I,J
int GET_SCALAR (2, int, method, 0) ;
//--------------------------------------------------------------------------
// [I,J,X] = find (A)
//--------------------------------------------------------------------------
if (method == 0)
{
//----------------------------------------------------------------------
// use GrB_[Matrix,Vector]_extractTuples_TYPE, no GrB_Vectors
//----------------------------------------------------------------------
// create I
pargout [0] = GB_mx_create_full (nvals, 1, GrB_UINT64) ;
I_output = mxGetData (pargout [0]) ;
// create J
if (nargout > 1)
{
pargout [1] = GB_mx_create_full (nvals, 1, GrB_UINT64) ;
J_output = mxGetData (pargout [1]) ;
}
// create X
xtype = GB_mx_string_to_Type (PARGIN (1), A->type) ;
if (nargout > 2)
{
pargout [2] = GB_mx_create_full (nvals, 1, xtype) ;
X = (GB_void *) mxGetData (pargout [2]) ;
}
uint64_t *I = (uint64_t *) I_output ;
uint64_t *J = (uint64_t *) J_output ;
if (GB_VECTOR_OK (A))
{
// test extract vector methods
GrB_Vector v = (GrB_Vector) A ;
switch (xtype->code)
{
case GB_BOOL_code : METHOD (GrB_Vector_extractTuples_BOOL_ (I, (bool *) X, &nvals, v)) ; break ;
case GB_INT8_code : METHOD (GrB_Vector_extractTuples_INT8_ (I, (int8_t *) X, &nvals, v)) ; break ;
case GB_UINT8_code : METHOD (GrB_Vector_extractTuples_UINT8_ (I, (uint8_t *) X, &nvals, v)) ; break ;
case GB_INT16_code : METHOD (GrB_Vector_extractTuples_INT16_ (I, (int16_t *) X, &nvals, v)) ; break ;
case GB_UINT16_code : METHOD (GrB_Vector_extractTuples_UINT16_(I, (uint16_t *) X, &nvals, v)) ; break ;
case GB_INT32_code : METHOD (GrB_Vector_extractTuples_INT32_ (I, (int32_t *) X, &nvals, v)) ; break ;
case GB_UINT32_code : METHOD (GrB_Vector_extractTuples_UINT32_(I, (uint32_t *) X, &nvals, v)) ; break ;
case GB_INT64_code : METHOD (GrB_Vector_extractTuples_INT64_ (I, (int64_t *) X, &nvals, v)) ; break ;
case GB_UINT64_code : METHOD (GrB_Vector_extractTuples_UINT64_(I, (uint64_t *) X, &nvals, v)) ; break ;
case GB_FP32_code : METHOD (GrB_Vector_extractTuples_FP32_ (I, (float *) X, &nvals, v)) ; break ;
case GB_FP64_code : METHOD (GrB_Vector_extractTuples_FP64_ (I, (double *) X, &nvals, v)) ; break ;
case GB_FC32_code : METHOD (GxB_Vector_extractTuples_FC32_ (I, (GxB_FC32_t *) X, &nvals, v)) ; break ;
case GB_FC64_code : METHOD (GxB_Vector_extractTuples_FC64_ (I, (GxB_FC64_t *) X, &nvals, v)) ; break ;
case GB_UDT_code : METHOD (GrB_Vector_extractTuples_UDT_ (I, (void *) X, &nvals, v)) ; break ;
default : FREE_ALL ; mexErrMsgTxt ("unsupported type") ;
}
if (J != NULL)
{
for (int64_t p = 0 ; p < nvals ; p++) J [p] = 0 ;
}
}
else
{
switch (xtype->code)
{
case GB_BOOL_code : METHOD (GrB_Matrix_extractTuples_BOOL_ (I, J, (bool *) X, &nvals, A)) ; break ;
case GB_INT8_code : METHOD (GrB_Matrix_extractTuples_INT8_ (I, J, (int8_t *) X, &nvals, A)) ; break ;
case GB_UINT8_code : METHOD (GrB_Matrix_extractTuples_UINT8_ (I, J, (uint8_t *) X, &nvals, A)) ; break ;
case GB_INT16_code : METHOD (GrB_Matrix_extractTuples_INT16_ (I, J, (int16_t *) X, &nvals, A)) ; break ;
case GB_UINT16_code : METHOD (GrB_Matrix_extractTuples_UINT16_(I, J, (uint16_t *) X, &nvals, A)) ; break ;
case GB_INT32_code : METHOD (GrB_Matrix_extractTuples_INT32_ (I, J, (int32_t *) X, &nvals, A)) ; break ;
case GB_UINT32_code : METHOD (GrB_Matrix_extractTuples_UINT32_(I, J, (uint32_t *) X, &nvals, A)) ; break ;
case GB_INT64_code : METHOD (GrB_Matrix_extractTuples_INT64_ (I, J, (int64_t *) X, &nvals, A)) ; break ;
case GB_UINT64_code : METHOD (GrB_Matrix_extractTuples_UINT64_(I, J, (uint64_t *) X, &nvals, A)) ; break ;
case GB_FP32_code : METHOD (GrB_Matrix_extractTuples_FP32_ (I, J, (float *) X, &nvals, A)) ; break ;
case GB_FP64_code : METHOD (GrB_Matrix_extractTuples_FP64_ (I, J, (double *) X, &nvals, A)) ; break ;
case GB_FC32_code : METHOD (GxB_Matrix_extractTuples_FC32_ (I, J, (GxB_FC32_t *) X, &nvals, A)) ; break ;
case GB_FC64_code : METHOD (GxB_Matrix_extractTuples_FC64_ (I, J, (GxB_FC64_t *) X, &nvals, A)) ; break ;
case GB_UDT_code : METHOD (GrB_Matrix_extractTuples_UDT_ (I, J, (void *) X, &nvals, A)) ; break ;
default : FREE_ALL ; mexErrMsgTxt ("unsupported type") ;
}
}
}
else
{
//----------------------------------------------------------------------
// use GxB_[Matrix,Vector]_extractTuples_Vector
//----------------------------------------------------------------------
#undef GET_DEEP_COPY
#define GET_DEEP_COPY \
GrB_Vector_new (&I_vector, GrB_UINT64, 0) ; \
if (nargout > 1) \
{ \
/* J = zeros (nvals,1) */ \
GrB_Vector_new (&J_vector, GrB_UINT32, nvals) ; \
GrB_Vector_assign_UINT32 (J_vector, NULL, NULL, 0, \
GrB_ALL, nvals, NULL) ; \
/* ensure J is non-iso */ \
if (nvals > 0) \
{ \
uint64_t gunk [1] ; \
gunk [0] = 0 ; \
GrB_Vector_assign_UINT32 (J_vector, NULL, NULL, \
1, gunk, 1, NULL) ; \
GrB_Vector_assign_UINT32 (J_vector, NULL, NULL, \
0, gunk, 1, NULL) ; \
} \
} \
if (nargout > 2) \
{ \
GrB_Vector_new (&X_vector, GrB_UINT64, 0) ; \
}
#undef FREE_DEEP_COPY
#define FREE_DEEP_COPY \
GrB_Vector_free_(&I_vector) ; \
GrB_Vector_free_(&J_vector) ; \
GrB_Vector_free_(&X_vector) ;
GET_DEEP_COPY ;
if (GB_VECTOR_OK (A))
{
GrB_Vector v = (GrB_Vector) A ;
METHOD (GxB_Vector_extractTuples_Vector_(I_vector, X_vector, v,
NULL)) ;
if (nargout > 1)
{
// J = zeros (nvals,1)
GrB_Vector_assign_UINT64 (J_vector, NULL, NULL, 0,
GrB_ALL, nvals, NULL) ;
}
}
else
{
METHOD (GxB_Matrix_extractTuples_Vector_(I_vector, J_vector,
X_vector, A, NULL)) ;
}
pargout [0] = GB_mx_Vector_to_mxArray (&I_vector, "I", false) ;
if (nargout > 1)
{
pargout [1] = GB_mx_Vector_to_mxArray (&J_vector, "J", false) ;
}
if (nargout > 2)
{
pargout [2] = GB_mx_Vector_to_mxArray (&X_vector, "X", false) ;
}
}
FREE_ALL ;
}
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