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//------------------------------------------------------------------------------
// GB_iso.h: definitions for iso methods
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#ifndef GB_ISO_H
#define GB_ISO_H
typedef enum
{
GB_NON_ISO = 0, // result is not iso
GB_ISO_1 = 1, // iso value is 1
GB_ISO_S = 2, // iso value is the scalar input
GB_ISO_A = 3, // iso value is A
GB_ISO_OP1_A = 4, // iso value is unop (A)
GB_ISO_OP2_SA = 5, // iso value is binop (scalar, A)
GB_ISO_OP2_AS = 6 // iso value is binop (A, scalar)
}
GB_iso_code ;
GB_iso_code GB_unop_code_iso // return the iso status of C
(
GrB_Matrix A, // input matrix
GB_Operator op, // unary/idxunop/binop, if present
bool binop_bind1st // if true, C = binop(x,A), else C = binop(A,y)
) ;
void GB_unop_iso // Cx [0] = unop (A), binop (s,A) or binop (A,s)
(
// output
GB_void *restrict Cx, // output scalar of iso array
// input
GrB_Type ctype, // type of Cx
GB_iso_code C_code_iso, // defines how C iso value is to be computed
GB_Operator op, // unary/idxunop/binop, if present
GrB_Matrix A, // input matrix
GrB_Scalar scalar // input scalar
) ;
GrB_Info GB_iso_expand // expand an iso scalar into an entire array
(
void *restrict X, // output array to expand into
int64_t n, // # of entries in X
void *restrict scalar, // scalar to expand into X
GrB_Type xtype // the type of the X and the scalar
) ;
bool GB_all_entries_are_iso // return true if A is iso, false otherwise
(
const GrB_Matrix A // matrix to test if all entries are the same
) ;
#endif
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