fmi-rs 0.3.1

#![allow(non_camel_case_types, non_snake_case)]

use std::ffi::c_void;
use crate::sundials::{sundials_types::SUNContext, sunmatrix_dense::{SM_COLUMNS_D, SM_DATA_D, SM_ROWS_D}};

// /* -----------------------------------------------------------------
//  * Programmer(s): Daniel Reynolds @ UMBC
//  *                David Gardner, Carol Woodward, Slaven Peles,
//  *                Cody Balos @ LLNL
//  * -----------------------------------------------------------------
//  * SUNDIALS Copyright Start
//  * Copyright (c) 2025-2026, Lawrence Livermore National Security,
//  * University of Maryland Baltimore County, and the SUNDIALS contributors.
//  * Copyright (c) 2013-2025, Lawrence Livermore National Security
//  * and Southern Methodist University.
//  * Copyright (c) 2002-2013, Lawrence Livermore National Security.
//  * All rights reserved.
//  *
//  * See the top-level LICENSE and NOTICE files for details.
//  *
//  * SPDX-License-Identifier: BSD-3-Clause
//  * SUNDIALS Copyright End
//  * -----------------------------------------------------------------
//  * This is the header file for a generic matrix package.
//  * It defines the SUNMatrix structure (_generic_SUNMatrix) which
//  * contains the following fields:
//  *   - an implementation-dependent 'content' field which contains
//  *     the description and actual data of the matrix
//  *   - an 'ops' filed which contains a structure listing operations
//  *     acting on such matrices
//  * -----------------------------------------------------------------
//  * This header file contains:
//  *   - enumeration constants for all SUNDIALS-defined matrix types,
//  *     as well as a generic type for user-supplied matrix types,
//  *   - type declarations for the _generic_SUNMatrix and
//  *     _generic_SUNMatrix_Ops structures, as well as references to
//  *     pointers to such structures (SUNMatrix), and
//  *   - prototypes for the matrix functions which operate on
//  *     SUNMatrix objects.
//  * -----------------------------------------------------------------
//  * At a minimum, a particular implementation of a SUNMatrix must
//  * do the following:
//  *   - specify the 'content' field of SUNMatrix,
//  *   - implement the operations on those SUNMatrix objects,
//  *   - provide a constructor routine for new SUNMatrix objects
//  *
//  * Additionally, a SUNMatrix implementation may provide the following:
//  *   - macros to access the underlying SUNMatrix data
//  *   - a routine to print the content of a SUNMatrix
//  * -----------------------------------------------------------------*/

// #ifndef _SUNMATRIX_H
// #define _SUNMATRIX_H

// #include <sundials/sundials_config.h>
// #include <sundials/sundials_context.h>
// #include <sundials/sundials_errors.h>
// #include <sundials/sundials_nvector.h>

// #ifdef __cplusplus /* wrapper to enable C++ usage */
// extern "C" {
// #endif

// /* -----------------------------------------------------------------
//  * Implemented SUNMatrix types
//  * ----------------------------------------------------------------- */

// enum SUNMatrix_ID
// {
//   SUNMATRIX_DENSE,
//   SUNMATRIX_MAGMADENSE,
//   SUNMATRIX_ONEMKLDENSE,
//   SUNMATRIX_BAND,
//   SUNMATRIX_SPARSE,
//   SUNMATRIX_SLUNRLOC,
//   SUNMATRIX_CUSPARSE,
//   SUNMATRIX_GINKGO,
//   SUNMATRIX_GINKGOBATCH,
//   SUNMATRIX_KOKKOSDENSE,
//   SUNMATRIX_CUSTOM
// };

// #ifndef SWIG
// typedef enum SUNMatrix_ID SUNMatrix_ID;
// #endif

// /* -----------------------------------------------------------------
//  * Generic definition of SUNMatrix
//  * ----------------------------------------------------------------- */

// /* Forward reference for pointer to SUNMatrix_Ops object */
// typedef _SUNDIALS_STRUCT_ _generic_SUNMatrix_Ops* SUNMatrix_Ops;
pub type SUNMatrix_Ops = *mut c_void;

// /* Forward reference for pointer to SUNMatrix object */
// typedef _SUNDIALS_STRUCT_ _generic_SUNMatrix* SUNMatrix;
pub type SUNMatrix = *mut _generic_SUNMatrix;

// /* Structure containing function pointers to matrix operations  */
// struct _generic_SUNMatrix_Ops
// {
//   SUNMatrix_ID (*getid)(SUNMatrix);
//   SUNMatrix (*clone)(SUNMatrix);
//   void (*destroy)(SUNMatrix);
//   SUNErrCode (*zero)(SUNMatrix);
//   SUNErrCode (*copy)(SUNMatrix, SUNMatrix);
//   SUNErrCode (*scaleadd)(sunrealtype, SUNMatrix, SUNMatrix);
//   SUNErrCode (*scaleaddi)(sunrealtype, SUNMatrix);
//   SUNErrCode (*matvecsetup)(SUNMatrix);
//   SUNErrCode (*matvec)(SUNMatrix, N_Vector, N_Vector);
//   SUNErrCode (*mathermitiantransposevec)(SUNMatrix, N_Vector, N_Vector);
//   SUNErrCode (*space)(SUNMatrix, long int*, long int*);
// };

// /* A matrix is a structure with an implementation-dependent
//    'content' field, and a pointer to a structure of matrix
//    operations corresponding to that implementation.  */
// struct _generic_SUNMatrix
// {
//   void* content;
//   SUNMatrix_Ops ops;
//   SUNContext sunctx;
// };
#[repr(C)]
pub struct _generic_SUNMatrix {
    pub content: *mut c_void,
    pub ops: SUNMatrix_Ops,
    pub sunctx: SUNContext,
}

impl AsMut<[f64]> for _generic_SUNMatrix {
    fn as_mut(&mut self) -> &mut [f64] {
        unsafe {
            let data = SM_DATA_D(self);
            let m = SM_ROWS_D(self);
            let n = SM_COLUMNS_D(self);
            std::slice::from_raw_parts_mut(
                data, 
                (m.saturating_mul(n)) as usize
            ) 
        }
    }
}

unsafe extern "C" {
// /* -----------------------------------------------------------------
//  * Functions exported by SUNMatrix module
//  * ----------------------------------------------------------------- */

// SUNDIALS_EXPORT
// SUNMatrix SUNMatNewEmpty(SUNContext sunctx);

// SUNDIALS_EXPORT
// void SUNMatFreeEmpty(SUNMatrix A);

// SUNDIALS_EXPORT
// SUNErrCode SUNMatCopyOps(SUNMatrix A, SUNMatrix B);

// SUNDIALS_EXPORT
// SUNMatrix_ID SUNMatGetID(SUNMatrix A);

// SUNDIALS_EXPORT
// SUNMatrix SUNMatClone(SUNMatrix A);

// SUNDIALS_EXPORT
// void SUNMatDestroy(SUNMatrix A);
pub unsafe fn SUNMatDestroy(A: SUNMatrix);

// SUNDIALS_EXPORT
// SUNErrCode SUNMatZero(SUNMatrix A);

// SUNDIALS_EXPORT
// SUNErrCode SUNMatCopy(SUNMatrix A, SUNMatrix B);

// SUNDIALS_EXPORT
// SUNErrCode SUNMatScaleAdd(sunrealtype c, SUNMatrix A, SUNMatrix B);

// SUNDIALS_EXPORT
// SUNErrCode SUNMatScaleAddI(sunrealtype c, SUNMatrix A);

// SUNDIALS_EXPORT
// SUNErrCode SUNMatMatvecSetup(SUNMatrix A);

// SUNDIALS_EXPORT
// SUNErrCode SUNMatMatvec(SUNMatrix A, N_Vector x, N_Vector y);

// SUNDIALS_EXPORT
// SUNErrCode SUNMatHermitianTransposeVec(SUNMatrix A, N_Vector x, N_Vector y);

// SUNDIALS_DEPRECATED_EXPORT_MSG(
//   "Work space functions will be removed in version 8.0.0")
// SUNErrCode SUNMatSpace(SUNMatrix A, long int* lenrw, long int* leniw);

// #ifdef __cplusplus
// }
// #endif

// #endif /* _SUNMATRIX_H */
}