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//------------------------------------------------------------------------------
// gb_mxstring_to_binop: get a GraphBLAS operator from a built-in string
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "gb_interface.h"
GrB_BinaryOp gb_mxstring_to_binop // return binary operator from a string
(
const mxArray *mxstring, // built-in string
const GrB_Type atype, // type of A
const GrB_Type btype // type of B
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
if (gb_mxarray_is_empty (mxstring))
{
// no operator is present, or present and empty; this is not yet an
// error, since many uses of GraphBLAS functions use an optional accum
// operator.
return (NULL) ;
}
//--------------------------------------------------------------------------
// get the string
//--------------------------------------------------------------------------
#define LEN 256
char opstring [LEN+2] ;
gb_mxstring_to_string (opstring, LEN, mxstring, "binary operator") ;
//--------------------------------------------------------------------------
// convert the string to a binary operator
//--------------------------------------------------------------------------
return (gb_string_to_binop_or_idxunop (opstring, atype, btype, NULL, NULL));
}
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