10 * Some silly typedefs to make our units very explicit.
12 * Also, the units are chosen so that values can be expressible as
13 * integers, so that we never have FP rounding issues. And they
14 * are small enough that converting to/from imperial units doesn't
17 * We also strive to make '0' a meaningless number saying "not
18 * initialized", since many values are things that may not have
19 * been reported (eg cylinder pressure or temperature from dive
20 * computers that don't support them). But sometimes -1 is an even
21 * more explicit way of saying "not there".
23 * Thus "millibar" for pressure, for example, or "millikelvin" for
24 * temperatures. Doing temperatures in celsius or fahrenheit would
25 * make for loss of precision when converting from one to the other,
26 * and using millikelvin is SI-like but also means that a temperature
27 * of '0' is clearly just a missing temperature or cylinder pressure.
29 * Also strive to use units that can not possibly be mistaken for a
30 * valid value in a "normal" system without conversion. If the max
31 * depth of a dive is '20000', you probably didn't convert from mm on
32 * output, or if the max depth gets reported as "0.2ft" it was either
33 * a really boring dive, or there was some missing input conversion,
34 * and a 60-ft dive got recorded as 60mm.
36 * Doing these as "structs containing value" means that we always
37 * have to explicitly write out those units in order to get at the
38 * actual value. So there is hopefully little fear of using a value
39 * in millikelvin as Fahrenheit by mistake.
41 * We don't actually use these all yet, so maybe they'll change, but
42 * I made a number of types as guidelines.
79 pressure_t workingpressure;
80 const char *description; /* "LP85", "AL72", "AL80", "HP100+" or whatever */
86 pressure_t start, end;
89 static inline double mm_to_feet(int mm)
91 return mm * 0.00328084;
94 static inline int to_feet(depth_t depth)
96 return mm_to_feet(depth.mm) + 0.5;
99 static double mkelvin_to_C(int mkelvin)
101 return (mkelvin - 273150) / 1000.0;
104 static double mkelvin_to_F(int mkelvin)
106 return mkelvin * 9 / 5000.0 - 459.670;
109 static inline int to_C(temperature_t temp)
113 return mkelvin_to_C(temp.mkelvin) + 0.5;
116 static inline int to_F(temperature_t temp)
120 return mkelvin_to_F(temp.mkelvin) + 0.5;
123 static inline int to_K(temperature_t temp)
127 return (temp.mkelvin + 499)/1000;
130 static inline int to_PSI(pressure_t pressure)
132 return pressure.mbar * 0.0145037738 + 0.5;
138 temperature_t temperature;
139 pressure_t cylinderpressure;
143 #define MAX_CYLINDERS (8)
150 char *divemaster, *buddy;
151 double latitude, longitude;
152 depth_t maxdepth, meandepth;
153 duration_t duration, surfacetime;
155 temperature_t airtemp, watertemp;
156 cylinder_t cylinder[MAX_CYLINDERS];
157 int samples, alloc_samples;
158 struct sample sample[];
162 * We keep our internal data in well-specified units, but
163 * the input and output may come in some random format. This
164 * keeps track of those units.
167 enum { METERS, FEET } length;
168 enum { LITER, CUFT } volume;
169 enum { BAR, PSI, PASCAL } pressure;
170 enum { CELSIUS, FAHRENHEIT, KELVIN } temperature;
171 enum { KG, LBS } weight;
174 extern const struct units SI_units, IMPERIAL_units;
175 extern struct units input_units, output_units;
184 extern struct dive_table dive_table;
186 extern int selected_dive;
187 #define current_dive (get_dive(selected_dive))
189 static inline struct dive *get_dive(unsigned int nr)
191 if (nr >= dive_table.nr)
193 return dive_table.dives[nr];
196 extern void parse_xml_init(void);
197 extern void parse_xml_file(const char *filename, GError **error);
199 extern void show_dive_info(struct dive *);
200 extern void flush_dive_info_changes(struct dive *);
202 extern void show_dive_equipment(struct dive *);
203 extern void flush_dive_equipment_changes(struct dive *);
205 extern void update_dive(struct dive *new_dive);
206 extern void save_dives(const char *filename);
208 static inline unsigned int dive_size(int samples)
210 return sizeof(struct dive) + samples*sizeof(struct sample);
213 extern time_t utc_mktime(struct tm *tm);
215 extern struct dive *alloc_dive(void);
216 extern void record_dive(struct dive *dive);
218 extern struct sample *prepare_sample(struct dive **divep);
219 extern void finish_sample(struct dive *dive, struct sample *sample);
221 extern void report_dives(void);
222 extern struct dive *fixup_dive(struct dive *dive);
223 extern struct dive *try_to_merge(struct dive *a, struct dive *b);
225 extern void renumber_dives(int nr);
227 /* UI related protopypes */
229 extern void init_ui(int argc, char **argv);
231 extern void run_ui(void);
233 extern void report_error(GError* error);
235 extern void dive_list_update_dives(void);
236 extern void flush_divelist(struct dive *dive);
238 extern int open_import_file_dialog(char *filterpattern, char *filtertext,
239 void(* parse_function)(char *));
240 #define DIVE_ERROR_PARSE 1
242 const char *weekday(int wday);
243 const char *monthname(int mon);
245 #define UTF8_DEGREE "\xc2\xb0"
246 #define UTF8_SUBSCRIPT_2 "\xe2\x82\x82"