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//------------------------------------------------------------------------------
// GB_mex_expand: C<M,struct> = scalar
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_mex.h"
#include "matrix.h"
#define USAGE "C = GB_mex_expand (M, scalar)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&M) ; \
GrB_Matrix_free_(&C) ; \
GB_mx_put_global (true) ; \
}
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
GrB_Info info ;
bool malloc_debug = GB_mx_get_global (true) ;
GrB_Matrix C = NULL, M = NULL ;
if (nargin != 2 || nargout > 1)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
// get M (shallow copy)
M = GB_mx_mxArray_to_Matrix (pargin [0], "M", false, false) ;
if (M == NULL && !mxIsEmpty (pargin [0]))
{
FREE_ALL ;
mexErrMsgTxt ("M failed") ;
}
GrB_Index nrows, ncols ;
GrB_Matrix_nrows (&nrows, M) ;
GrB_Matrix_ncols (&ncols, M) ;
// get scalar
if (!mxIsScalar (pargin [1]))
{
FREE_ALL ;
mexErrMsgTxt ("scalar failed") ;
}
// C<M,struct> = scalar
if (mxIsSparse (pargin [1]))
{
mexErrMsgTxt ("scalar must not be sparse") ;
}
GrB_Type ctype = GB_mx_Type (pargin [1]) ;
GrB_Matrix_new (&C, ctype, nrows, ncols) ;
if (ctype == Complex && Complex != GxB_FC64)
{
// user-defined complex case
GxB_FC64_t *scalar = (GxB_FC64_t *) mxGetComplexDoubles (pargin [1]) ;
info = GxB_Matrix_subassign_UDT_(C, M, NULL, (void *) scalar,
GrB_ALL, nrows, GrB_ALL, ncols, GrB_DESC_RS) ;
if (info != GrB_SUCCESS)
{
mexErrMsgTxt ("GxB_Matrix_subassign_[complex] failed") ;
}
}
else
{
// built-in GraphBLAS types
#define CREATE(suffix,c_type) \
{ \
c_type *scalar = (c_type *) mxGetData (pargin [1]) ; \
GxB_Matrix_subassign ## suffix (C, M, NULL, *scalar, \
GrB_ALL, nrows, GrB_ALL, ncols, GrB_DESC_RS) ; \
} \
break ;
switch (ctype->code)
{
case GB_BOOL_code : CREATE (_BOOL, bool ) ;
case GB_INT8_code : CREATE (_INT8, int8_t ) ;
case GB_INT16_code : CREATE (_INT16, int16_t ) ;
case GB_INT32_code : CREATE (_INT32, int32_t ) ;
case GB_INT64_code : CREATE (_INT64, int64_t ) ;
case GB_UINT8_code : CREATE (_UINT8, uint8_t ) ;
case GB_UINT16_code : CREATE (_UINT16, uint16_t ) ;
case GB_UINT32_code : CREATE (_UINT32, uint32_t ) ;
case GB_UINT64_code : CREATE (_UINT32, uint64_t ) ;
case GB_FP32_code : CREATE (_FP32, float ) ;
case GB_FP64_code : CREATE (_FP64, double ) ;
case GB_FC32_code : CREATE (_FC32, GxB_FC32_t) ;
case GB_FC64_code : CREATE (_FC64, GxB_FC64_t) ;
default: mexErrMsgTxt ("scalar type not supported") ;
}
}
// return result
pargout [0] = GB_mx_Matrix_to_mxArray (&C, "C result", true) ;
FREE_ALL ;
}
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