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//------------------------------------------------------------------------------
// GB_mex_dup: copy a matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2020, All Rights Reserved.
// http://suitesparse.com See GraphBLAS/Doc/License.txt for license.
//------------------------------------------------------------------------------
// copy and typecast a matrix
#include "GB_mex.h"
#define USAGE "C = GB_mex_dup (A, type, method)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&A) ; \
GrB_Matrix_free_(&C) ; \
GrB_Descriptor_free_(&desc) ; \
GB_mx_put_global (true, 0) ; \
}
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
bool malloc_debug = GB_mx_get_global (true) ;
GrB_Matrix A = NULL, C = NULL ;
GrB_Descriptor desc = NULL ;
// check inputs
GB_WHERE (USAGE) ;
if (nargout > 1 || 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 ctype of output matrix
GrB_Type ctype = GB_mx_string_to_Type (PARGIN (1), A->type) ;
// get method
int GET_SCALAR (2, int, method, 0) ;
if (ctype == A->type)
{
// copy C with the same type as A
if (method == 0)
{
// printf ("dup\n") ;
METHOD (GrB_Matrix_dup (&C, A)) ;
}
else
{
// try another method, just for testing (see User Guide)
// C = create an exact copy of A, just like GrB_Matrix_dup
// printf ("tran dup\n") ;
GrB_Type type ;
GrB_Index nrows, ncols ;
#undef GET_DEEP_COPY
#undef FREE_DEEP_COPY
#define GET_DEEP_COPY \
{ \
GxB_Matrix_type (&type, A) ; \
GrB_Matrix_nrows (&nrows, A) ; \
GrB_Matrix_ncols (&ncols, A) ; \
GrB_Matrix_new (&C, type, nrows, ncols) ; \
GrB_Descriptor_new (&desc) ; \
GxB_Desc_set (desc, GrB_INP0, GrB_TRAN) ; \
}
#define FREE_DEEP_COPY \
{ \
GrB_Matrix_free_(&C) ; \
GrB_Descriptor_free_(&desc) ; \
}
GET_DEEP_COPY ;
METHOD (GrB_transpose (C, NULL, NULL, A, desc)) ;
#undef GET_DEEP_COPY
#undef FREE_DEEP_COPY
}
}
else
{
// typecast
if (A->type == Complex && Complex != GxB_FC64)
{
A->type = GxB_FC64 ;
}
// C = (ctype) A
// printf ("cast\n") ;
GrB_Index nrows, ncols ;
#define GET_DEEP_COPY \
{ \
GrB_Matrix_nrows (&nrows, A) ; \
GrB_Matrix_ncols (&ncols, A) ; \
GrB_Matrix_new (&C, ctype, nrows, ncols) ; \
GrB_Descriptor_new (&desc) ; \
GxB_Desc_set (desc, GrB_INP0, GrB_TRAN) ; \
}
#define FREE_DEEP_COPY \
{ \
GrB_Matrix_free_(&C) ; \
GrB_Descriptor_free_(&desc) ; \
}
GET_DEEP_COPY ;
METHOD (GrB_transpose (C, NULL, NULL, A, desc)) ;
#undef GET_DEEP_COPY
#undef FREE_DEEP_COPY
}
// return C to MATLAB as a struct and free the GraphBLAS C
pargout [0] = GB_mx_Matrix_to_mxArray (&C, "C output", true) ;
FREE_ALL ;
}
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