/**
* @license Apache-2.0
*
* Copyright (c) 2023 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#ifndef STDLIB_BLAS_BASE_SHARED_MACROS_H
#define STDLIB_BLAS_BASE_SHARED_MACROS_H

/*
* If C++, prevent name mangling so that the compiler emits a binary file having undecorated names, thus mirroring the behavior of a C compiler.
*/
#ifdef __cplusplus
extern "C" {
#endif

/**
* Macro for converting a stride to an index offset.
*
* @param N         number of indexed elements
* @param stride    index increment
*
* @example
* #include <stdint.h>
*
* int64_t offset = STDLIB_BLAS_BASE_STRIDE2OFFSET( 10, -10 );
* // returns 90
*/
#define STDLIB_BLAS_BASE_STRIDE2OFFSET( N, stride ) ( ( (stride) > 0 ) ? 0 : ( 1-(N) ) * (stride) )

#ifdef __cplusplus
}
#endif

#endif // !STDLIB_BLAS_BASE_SHARED_MACROS_H