#ifndef __CS_VOLUME_MASS_INJECTION_H__
#define __CS_VOLUME_MASS_INJECTION_H__

/*============================================================================
 * Mass source terms computation.
 *============================================================================*/

/*
  This file is part of Code_Saturne, a general-purpose CFD tool.

  Copyright (C) 1998-2020 EDF S.A.

  This program is free software; you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free Software
  Foundation; either version 2 of the License, or (at your option) any later
  version.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
  Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/

/*----------------------------------------------------------------------------
 *  Local headers
 *----------------------------------------------------------------------------*/

#include "cs_base.h"

/*----------------------------------------------------------------------------*/

BEGIN_C_DECLS

/*============================================================================
 * Type definitions
 *============================================================================*/

/*----------------------------------------------------------------------------*/
/*!
 * \brief Function pointer to update cell values in a given zone
 *        for volume mass injection.
 *
 * \note if the input pointer is non-NULL, it must point to valid data
 * when the selection function is called, so either:
 * - that value or structure should not be temporary (i.e. local);
 * - post-processing output must be ensured using cs_post_write_meshes()
 *   with a fixed-mesh writer before the data pointed to goes out of scope;
 *
 * \param<(in]       input  pointer to optional (untyped) value or structure
 * \param<(in]       z      pointer to associated zone.
 * \param<(in]       f      pointer to associated field
 * \param<(in, out]  val    resulting values, defined on cells
 *----------------------------------------------------------------------------*/

typedef void
(cs_volume_mass_injection_eval_t) (void             *input,
                                   const cs_zone_t  *z,
                                   cs_field_t       *f,
                                   cs_real_t        *val);

/*!
 * \struct cs_volume_mass_injection_by_function_context_t
 * \brief Context structure associated to a mass injection inside a volume
 *        relying on a function
 */

typedef struct {

  /*! \var input
   * NULL or pointer to a structure cast on-the-fly for additional information
   * used in the function
   */
  void                             *input;

  /*! \var func
   * pointer to a \ref cs_volume_mass_injection_eval_t to call
   */
  cs_volume_mass_injection_eval_t  *func;

} cs_volume_mass_injection_by_function_context_t;

/*=============================================================================
 * Public function prototypes
 *============================================================================*/

/*----------------------------------------------------------------------------*/
/*!
 * \brief Flag volume zones with the appropriate
 *        CS_VOLUME_ZONE_MASS_SOURCE_TERM flag when at least one volume
 *        mass injection on that zone is present.
 *
 * This is necessary for the reverse zone indexing required by the legacy code
 * to function with defintions that are partially unrolled an not purely
 * zone-based.
 */
/*----------------------------------------------------------------------------*/

void
cs_volume_mass_injection_flag_zones(void);

/*----------------------------------------------------------------------------*/
/*!
 * \brief Build the list and zone ids of cells with volume mass injection.
 *
 * \param[in]   n_cells       number of cells in mass source term zones
 * \param[out]  cell_num      numbers (1-based) cells in mass source term zones
 * \param[out]  cell_zone_id  associated zone ids
 */
/*----------------------------------------------------------------------------*/

void
cs_volume_mass_injection_build_lists(cs_lnum_t   n_cells,
                                     cs_lnum_t   cell_num[],
                                     int         cell_zone_id[]);

/*----------------------------------------------------------------------------*/
/*!
 * \brief Evaluate contributions to volume mass injection.
 *
 * \param[in]     nvar          total number of variables
 * \param[in]     ncesmp        number of cells with mass source term
 * \param[in]     itypsm        mass source type for the working variable
 *                              size: [nvar][ncesmp]
 * \param[in]     smacel        values of the variables associated to the
 *                              mass source (for the pressure variable,
 *                              smacel is the mass flux)
 *                              size: [nvar][ncesmp]
 */
/*----------------------------------------------------------------------------*/

void
cs_volume_mass_injection_eval(int        nvar,
                              cs_lnum_t  ncesmp,
                              int        itypsm[],
                              cs_real_t  smacel[]);

/*----------------------------------------------------------------------------*/

END_C_DECLS

#endif /* __CS_VOLUME_MASS_INJECTION_H__ */
