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//------------------------------------------------------------------------------
// gb_string_to_binop_or_idxunop: get a GraphBLAS operator from a string
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "gb_interface.h"
// The string has the form op_name.op_type. For example '+.double' is the
// GrB_PLUS_FP64 operator. The type is optional. If not present in the
// string, it is found by gb_default_type (atype, btype).
GrB_BinaryOp gb_string_to_binop_or_idxunop
(
char *opstring, // string defining the operator
const GrB_Type atype, // type of A
const GrB_Type btype, // type of B
GrB_IndexUnaryOp *idxunop, // idxunop from the string
int64_t *ithunk // thunk for idxunop
)
{
//--------------------------------------------------------------------------
// get the string and parse it
//--------------------------------------------------------------------------
int32_t position [2] ;
gb_find_dot (position, opstring) ;
char *op_name = opstring ;
char *op_typename = NULL ;
if (position [0] >= 0)
{
opstring [position [0]] = '\0' ;
op_typename = opstring + position [0] + 1 ;
}
//--------------------------------------------------------------------------
// get the operator type
//--------------------------------------------------------------------------
bool type_not_given = (op_typename == NULL) ;
GrB_Type type ;
if (type_not_given)
{
type = gb_default_type (atype, btype) ;
}
else
{
type = gb_string_to_type (op_typename) ;
}
//--------------------------------------------------------------------------
// convert the string to a GraphBLAS binary operator, built-in or Complex
//--------------------------------------------------------------------------
return (gb_string_and_type_to_binop_or_idxunop (op_name, type,
type_not_given, idxunop, ithunk)) ;
}
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