path: root/core/dive.h

// SPDX-License-Identifier: GPL-2.0
#ifndef DIVE_H
#define DIVE_H

// dive and dive computer related structures and helpers

#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <time.h>
#include <math.h>
#include <string.h>
#include <stdio.h>

#include "divemode.h"
#include "divecomputer.h"
#include "equipment.h"
#include "picture.h"

#ifdef __cplusplus
extern "C" {
#endif

extern int last_xml_version;

extern const char *cylinderuse_text[NUM_GAS_USE];
extern const char *divemode_text_ui[];
extern const char *divemode_text[];

/* Linear interpolation between 'a' and 'b', when we are 'part'way into the 'whole' distance from a to b */
static inline int interpolate(int a, int b, int part, int whole)
{
	/* It is doubtful that we actually need floating point for this, but whatever */
	if (whole) {
		double x = (double)a * (whole - part) + (double)b * part;
		return (int)lrint(x / whole);
	}
	return (a+b)/2;
}

struct dive_site;
struct dive_site_table;
struct dive_table;
struct dive_trip;
struct full_text_cache;
struct event;
struct trip_table;
struct dive {
	struct dive_trip *divetrip;
	timestamp_t when;
	struct dive_site *dive_site;
	char *notes;
	char *divemaster, *buddy;
	struct cylinder_table cylinders;
	struct weightsystem_table weightsystems;
	char *suit;
	int number;
	int rating;
	int wavesize, current, visibility, surge, chill; /* 0 - 5 star ratings */
	int sac, otu, cns, maxcns;

	/* Calculated based on dive computer data */
	temperature_t mintemp, maxtemp, watertemp, airtemp;
	depth_t maxdepth, meandepth;
	pressure_t surface_pressure;
	duration_t duration;
	int salinity; // kg per 10000 l
	int user_salinity; // water density reflecting a user-specified type

	struct tag_entry *tag_list;
	struct divecomputer dc;
	int id; // unique ID for this dive
	struct picture_table pictures;
	unsigned char git_id[20];
	bool notrip; /* Don't autogroup this dive to a trip */
	bool selected;
	bool hidden_by_filter;
	struct full_text_cache *full_text; /* word cache for full text search */
	bool invalid;
};

/* For the top-level list: an entry is either a dive or a trip */
struct dive_or_trip {
	struct dive *dive;
	struct dive_trip *trip;
};

extern void invalidate_dive_cache(struct dive *dive);
extern bool dive_cache_is_valid(const struct dive *dive);

extern int get_cylinder_idx_by_use(const struct dive *dive, enum cylinderuse cylinder_use_type);
extern void cylinder_renumber(struct dive *dive, int mapping[]);
extern int same_gasmix_cylinder(const cylinder_t *cyl, int cylid, const struct dive *dive, bool check_unused);

/* when selectively copying dive information, which parts should be copied? */
struct dive_components {
	unsigned int divesite : 1;
	unsigned int notes : 1;
	unsigned int divemaster : 1;
	unsigned int buddy : 1;
	unsigned int suit : 1;
	unsigned int rating : 1;
	unsigned int visibility : 1;
	unsigned int wavesize : 1;
	unsigned int current : 1;
	unsigned int surge : 1;
	unsigned int chill : 1;
	unsigned int tags : 1;
	unsigned int cylinders : 1;
	unsigned int weights : 1;
};

extern bool has_gaschange_event(const struct dive *dive, const struct divecomputer *dc, int idx);
extern int explicit_first_cylinder(const struct dive *dive, const struct divecomputer *dc);

extern fraction_t best_o2(depth_t depth, const struct dive *dive);
extern fraction_t best_he(depth_t depth, const struct dive *dive, bool o2narcotic, fraction_t fo2);

extern int get_surface_pressure_in_mbar(const struct dive *dive, bool non_null);
extern int depth_to_mbar(int depth, const struct dive *dive);
extern double depth_to_bar(int depth, const struct dive *dive);
extern double depth_to_atm(int depth, const struct dive *dive);
extern int rel_mbar_to_depth(int mbar, const struct dive *dive);
extern int mbar_to_depth(int mbar, const struct dive *dive);
extern depth_t gas_mod(struct gasmix mix, pressure_t po2_limit, const struct dive *dive, int roundto);
extern depth_t gas_mnd(struct gasmix mix, depth_t end, const struct dive *dive, int roundto);

extern bool autogroup;

struct dive *unregister_dive(int idx);
extern void delete_single_dive(int idx);

extern int quit, force_root, ignore_bt;
#ifdef SUBSURFACE_MOBILE_DESKTOP
extern char *testqml;
#endif

extern struct dive displayed_dive;
extern unsigned int dc_number;
extern struct dive *current_dive;
#define current_dc (get_dive_dc(current_dive, dc_number))
#define displayed_dc (get_dive_dc(&displayed_dive, dc_number))

extern struct dive *get_dive(int nr);
extern struct dive *get_dive_from_table(int nr, const struct dive_table *dt);
extern struct dive_site *get_dive_site_for_dive(const struct dive *dive);
extern const char *get_dive_country(const struct dive *dive);
extern const char *get_dive_location(const struct dive *dive);
extern unsigned int number_of_computers(const struct dive *dive);
extern struct divecomputer *get_dive_dc(struct dive *dive, int nr);
extern timestamp_t dive_endtime(const struct dive *dive);

extern struct dive *make_first_dc(const struct dive *d, int dc_number);
extern struct dive *clone_delete_divecomputer(const struct dive *d, int dc_number);
void split_divecomputer(const struct dive *src, int num, struct dive **out1, struct dive **out2);

/*
 * Iterate over each dive, with the first parameter being the index
 * iterator variable, and the second one being the dive one.
 *
 * I don't think anybody really wants the index, and we could make
 * it local to the for-loop, but that would make us requires C99.
 */
#define for_each_dive(_i, _x) \
	for ((_i) = 0; ((_x) = get_dive(_i)) != NULL; (_i)++)

#define for_each_dc(_dive, _dc) \
	for (_dc = &_dive->dc; _dc; _dc = _dc->next)

extern struct dive *get_dive_by_uniq_id(int id);
extern int get_idx_by_uniq_id(int id);
extern bool dive_site_has_gps_location(const struct dive_site *ds);
extern int dive_has_gps_location(const struct dive *dive);
extern location_t dive_get_gps_location(const struct dive *d);

extern bool time_during_dive_with_offset(const struct dive *dive, timestamp_t when, timestamp_t offset);

extern int save_dives(const char *filename);
extern int save_dives_logic(const char *filename, bool select_only, bool anonymize);
extern int save_dive(FILE *f, struct dive *dive, bool anonymize);
extern int export_dives_xslt(const char *filename, bool selected, const int units, const char *export_xslt, bool anonymize);

extern int save_dive_sites_logic(const char *filename, const struct dive_site *sites[], int nr_sites, bool anonymize);

struct membuffer;
extern void save_one_dive_to_mb(struct membuffer *b, struct dive *dive, bool anonymize);

extern void subsurface_console_init(void);
extern void subsurface_console_exit(void);
extern bool subsurface_user_is_root(void);

extern struct dive *alloc_dive(void);
extern void free_dive(struct dive *);
extern void record_dive_to_table(struct dive *dive, struct dive_table *table);
extern void clear_dive(struct dive *dive);
extern void copy_dive(const struct dive *s, struct dive *d);
extern void selective_copy_dive(const struct dive *s, struct dive *d, struct dive_components what, bool clear);
extern struct dive *move_dive(struct dive *s);

extern int legacy_format_o2pressures(const struct dive *dive, const struct divecomputer *dc);

extern bool dive_less_than(const struct dive *a, const struct dive *b);
extern bool dive_or_trip_less_than(struct dive_or_trip a, struct dive_or_trip b);
extern void sort_dive_table(struct dive_table *table);
extern struct dive *fixup_dive(struct dive *dive);
extern pressure_t calculate_surface_pressure(const struct dive *dive);
extern pressure_t un_fixup_surface_pressure(const struct dive *d);
extern int get_dive_salinity(const struct dive *dive);
extern int dive_getUniqID();
extern int split_dive(const struct dive *dive, struct dive **new1, struct dive **new2);
extern int split_dive_at_time(const struct dive *dive, duration_t time, struct dive **new1, struct dive **new2);
extern struct dive *merge_dives(const struct dive *a, const struct dive *b, int offset, bool prefer_downloaded, struct dive_trip **trip, struct dive_site **site);
extern struct dive *try_to_merge(struct dive *a, struct dive *b, bool prefer_downloaded);
extern void copy_events_until(const struct dive *sd, struct dive *dd, int time);
extern void copy_used_cylinders(const struct dive *s, struct dive *d, bool used_only);
extern bool is_cylinder_used(const struct dive *dive, int idx);
extern bool is_cylinder_prot(const struct dive *dive, int idx);
extern void add_gas_switch_event(struct dive *dive, struct divecomputer *dc, int time, int idx);
extern struct event *create_gas_switch_event(struct dive *dive, struct divecomputer *dc, int seconds, int idx);
extern void update_event_name(struct dive *d, struct event *event, const char *name);
extern void per_cylinder_mean_depth(const struct dive *dive, struct divecomputer *dc, int *mean, int *duration);
extern int get_cylinder_index(const struct dive *dive, const struct event *ev);
extern struct gasmix get_gasmix_from_event(const struct dive *, const struct event *ev);
extern int nr_cylinders(const struct dive *dive);
extern int nr_weightsystems(const struct dive *dive);

/* UI related protopypes */

extern void invalidate_dive_cache(struct dive *dc);

extern void set_autogroup(bool value);
extern int total_weight(const struct dive *);

#define DIVE_ERROR_PARSE 1
#define DIVE_ERROR_PLAN 2

const char *monthname(int mon);

extern const char *existing_filename;
extern void subsurface_command_line_init(int *, char ***);
extern void subsurface_command_line_exit(int *, char ***);

extern bool has_planned(const struct dive *dive, bool planned);

/* Get gasmixes at increasing timestamps.
 * In "evp", pass a pointer to a "struct event *" which is NULL-initialized on first invocation.
 * On subsequent calls, pass the same "evp" and the "gasmix" from previous calls.
 */
extern struct gasmix get_gasmix(const struct dive *dive, const struct divecomputer *dc, int time, const struct event **evp, struct gasmix gasmix);

/* Get gasmix at a given time */
extern struct gasmix get_gasmix_at_time(const struct dive *dive, const struct divecomputer *dc, duration_t time);

extern void set_informational_units(const char *units);
extern void set_git_prefs(const char *prefs);

extern char *get_dive_date_c_string(timestamp_t when);
extern void update_setpoint_events(const struct dive *dive, struct divecomputer *dc);

#ifdef __cplusplus
}

/* Make pointers to dive and dive_trip "Qt metatypes" so that they can be passed through
 * QVariants and through QML.
 */
#include <QObject>
Q_DECLARE_METATYPE(struct dive *);

#endif

#include "pref.h"

#endif // DIVE_H