divergence.h

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#ifndef OAKFIELD_DIVERGENCE_H
#define OAKFIELD_DIVERGENCE_H
 
#include "oakfield/operator_split.h"
 
#include <stdbool.h>
#include <stddef.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct SimContext;
 
#define SIM_DIVERGENCE_AXIS_AUTO ((size_t)SIZE_MAX)
 
typedef enum SimDivergenceStencil {
    SIM_DIVERGENCE_STENCIL_CENTRAL_2 = 0, 
    SIM_DIVERGENCE_STENCIL_CENTRAL_4,     
    SIM_DIVERGENCE_STENCIL_FORWARD_1,     
    SIM_DIVERGENCE_STENCIL_BACKWARD_1,    
    SIM_DIVERGENCE_STENCIL_FORWARD_2,     
    SIM_DIVERGENCE_STENCIL_BACKWARD_2     
} SimDivergenceStencil;
 
typedef struct SimDivergenceOperatorConfig {
    size_t input_field_x;         
    size_t input_field_y;         
    size_t output_field;          
    double spacing_x;             
    double spacing_y;             
    size_t axis_x;                
    size_t axis_y;                
    SimDivergenceStencil stencil; 
    SimIRBoundaryPolicy boundary; 
    bool accumulate;              
    bool scale_by_dt;             
} SimDivergenceOperatorConfig;
 
SimResult sim_add_divergence_operator(struct SimContext *context,
                                      const SimDivergenceOperatorConfig *config, size_t *out_index);
 
SimResult sim_divergence_config(struct SimContext *context, size_t operator_index,
                                SimDivergenceOperatorConfig *out_config);
 
SimResult sim_divergence_update(struct SimContext *context, size_t operator_index,
                                const SimDivergenceOperatorConfig *config);
 
#ifdef __cplusplus
}
#endif
 
#endif /* OAKFIELD_DIVERGENCE_H */