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//------------------------------------------------------------------------------
// GB_mx_mxArray_to_BinaryOp
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2020, All Rights Reserved.
// http://suitesparse.com See GraphBLAS/Doc/License.txt for license.
//------------------------------------------------------------------------------
// Convert a MATLAB string or struct to a built-in GraphBLAS BinaryOp. The
// mxArray is either a struct containing two terms: opname (an operator name),
// and an optional MATLAB string optype (a string, 'logical', 'double', etc).
// If not present, the default type is used (provided on input).
//
// That is:
// op = 'plus' ; % the GrB_PLUS_*, type determined by default_optype.
//
// op.opname = 'plus' ; op.type = 'int8' ; % the GrB_PLUS_INT8 operator.
#include "GB_mex.h"
bool GB_mx_mxArray_to_BinaryOp // true if successful, false otherwise
(
GrB_BinaryOp *op_handle, // the binary op
const mxArray *op_matlab, // MATLAB version of op
const char *name, // name of the argument
const GrB_Type default_optype, // default operator type
const bool user_complex // if true, use user-defined Complex
)
{
GB_WHERE ("GB_mx_mxArray_to_BinaryOp") ;
(*op_handle) = NULL ;
const mxArray *opname_mx = NULL, *optype_mx = NULL ;
if (op_matlab == NULL || mxIsEmpty (op_matlab))
{
// op is not present; defaults will be used
;
}
else if (mxIsStruct (op_matlab))
{
// look for op.opname
int fieldnumber = mxGetFieldNumber (op_matlab, "opname") ;
if (fieldnumber >= 0)
{
opname_mx = mxGetFieldByNumber (op_matlab, 0, fieldnumber) ;
}
// look for op.optype
fieldnumber = mxGetFieldNumber (op_matlab, "optype") ;
if (fieldnumber >= 0)
{
optype_mx = mxGetFieldByNumber (op_matlab, 0, fieldnumber) ;
}
}
else
{
// op must be a string. default type will be used
opname_mx = op_matlab ;
}
// find the corresponding built-in GraphBLAS operator
GrB_BinaryOp op ;
if (!GB_mx_string_to_BinaryOp (&op, default_optype, opname_mx, optype_mx,
user_complex))
{
return (false) ;
}
// return the op
ASSERT_BINARYOP_OK_OR_NULL (op, name, GB0) ;
(*op_handle) = op ;
return (true) ;
}
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