#ifndef FESA_SRC_FESA_MATH_DENSE_BLAS_INTERNAL_H_
#define FESA_SRC_FESA_MATH_DENSE_BLAS_INTERNAL_H_

#include <mkl.h>

#include <cstddef>

#include "fesa/core/status.h"

namespace fesa::dense_blas_internal {

/// @brief Converts a dense storage length to the private MKL integer type.
/// @return The converted length or an uncategorized overflow failure.
Result<MKL_INT> ToMklSize(std::size_t size);

/// @brief Copies contiguous double values through the private BLAS backend.
/// @param source Readable storage for size values when size is nonzero.
/// @param size Number of contiguous values to copy.
/// @param destination Writable storage for size values when size is nonzero.
/// @throws std::length_error if size exceeds the MKL integer range.
/// @note A zero-length copy accepts null pointers and does not call BLAS.
void CopyValues(const double* source, std::size_t size, double* destination);

}  // namespace fesa::dense_blas_internal

#endif  // FESA_SRC_FESA_MATH_DENSE_BLAS_INTERNAL_H_