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//------------------------------------------------------------------------------
// GB_scalar.h: definitions for GrB_Scalar
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#ifndef GB_SCALAR_H
#define GB_SCALAR_H
GrB_Scalar GB_Scalar_wrap // create a new GrB_Scalar with one entry
(
GrB_Scalar s, // GrB_Scalar to create
GrB_Type type, // type of GrB_Scalar to create
void *Sx // becomes S->x, an array of size 1 * type->size
) ;
// stype can be NULL if op is positional
// wrap a bare scalar inside a statically-allocated GrB_Scalar
#define GB_SCALAR_WRAP(scalar,bare,stype) \
struct GB_Scalar_opaque scalar ## _header ; \
size_t ssize = (stype == NULL) ? 1 : (stype->size) ; \
GB_void Sx [GB_VLA(ssize)] ; \
GrB_Scalar scalar = GB_Scalar_wrap (& scalar ## _header, stype, Sx) ; \
memcpy (Sx, &bare, ssize) ;
// wrap a void *bare scalar inside a statically-allocated GrB_Scalar
#define GB_SCALAR_WRAP_UDT(scalar,bare,scalar_type) \
GrB_Type stype = scalar_type ; \
struct GB_Scalar_opaque scalar ## _header ; \
size_t ssize = (stype == NULL) ? 1 : (stype->size) ; \
GB_void Sx [GB_VLA(ssize)] ; \
GrB_Scalar scalar = NULL ; \
if (bare != NULL && stype != NULL) \
{ \
scalar = GB_Scalar_wrap (& scalar ## _header, stype, Sx) ; \
memcpy (Sx, bare, ssize) ; \
}
#endif
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