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// SPDX-License-Identifier: GPL-2.0
#ifndef DECO_H
#define DECO_H
#include "units.h"
#include "gas.h"
#include "divemode.h"
#ifdef __cplusplus
extern "C" {
#endif
struct dive;
struct divecomputer;
struct decostop;
struct deco_state {
double tissue_n2_sat[16];
double tissue_he_sat[16];
double tolerated_by_tissue[16];
double tissue_inertgas_saturation[16];
double buehlmann_inertgas_a[16];
double buehlmann_inertgas_b[16];
double max_n2_crushing_pressure[16];
double max_he_crushing_pressure[16];
double crushing_onset_tension[16]; // total inert gas tension in the t* moment
double n2_regen_radius[16]; // rs
double he_regen_radius[16];
double max_ambient_pressure; // last moment we were descending
double bottom_n2_gradient[16];
double bottom_he_gradient[16];
double initial_n2_gradient[16];
double initial_he_gradient[16];
pressure_t first_ceiling_pressure;
pressure_t max_bottom_ceiling_pressure;
int ci_pointing_to_guiding_tissue;
double gf_low_pressure_this_dive;
int deco_time;
bool icd_warning;
int sum1;
long sumx, sumxx;
double sumy, sumxy;
int plot_depth;
};
extern const double buehlmann_N2_t_halflife[];
extern int deco_allowed_depth(double tissues_tolerance, double surface_pressure, const struct dive *dive, bool smooth);
double get_gf(struct deco_state *ds, double ambpressure_bar, const struct dive *dive);
extern void clear_deco(struct deco_state *ds, double surface_pressure);
extern void dump_tissues(struct deco_state *ds);
extern void set_gf(short gflow, short gfhigh);
extern void set_vpmb_conservatism(short conservatism);
extern void cache_deco_state(struct deco_state *source, struct deco_state **datap);
extern void restore_deco_state(struct deco_state *data, struct deco_state *target, bool keep_vpmb_state);
extern void nuclear_regeneration(struct deco_state *ds, double time);
extern void vpmb_start_gradient(struct deco_state *ds);
extern void vpmb_next_gradient(struct deco_state *ds, double deco_time, double surface_pressure);
extern double tissue_tolerance_calc(struct deco_state *ds, const struct dive *dive, double pressure);
extern void calc_crushing_pressure(struct deco_state *ds, double pressure);
extern void vpmb_start_gradient(struct deco_state *ds);
extern void clear_vpmb_state(struct deco_state *ds);
extern void add_segment(struct deco_state *ds, double pressure, struct gasmix gasmix, int period_in_seconds, int setpoint, enum divemode_t divemode, int sac);
extern double regressiona(const struct deco_state *ds);
extern double regressionb(const struct deco_state *ds);
extern void reset_regression(struct deco_state *ds);
extern void update_regression(struct deco_state *ds, const struct dive *dive);
#ifdef __cplusplus
}
#endif
#endif // DECO_H
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