2 /* maintains the internal dive list structure */
8 void add_event(struct dive *dive, int time, int type, int flags, int value, const char *name)
10 struct event *ev, **p;
11 unsigned int size, len = strlen(name);
13 size = sizeof(*ev) + len + 1;
18 memcpy(ev->name, name, len);
19 ev->time.seconds = time;
31 double get_depth_units(unsigned int mm, int *frac, const char **units)
37 switch (output_units.length) {
56 struct dive *alloc_dive(void)
58 const int initial_samples = 5;
62 size = dive_size(initial_samples);
66 memset(dive, 0, size);
67 dive->alloc_samples = initial_samples;
71 struct sample *prepare_sample(struct dive **divep)
73 struct dive *dive = *divep;
75 int nr = dive->samples;
76 int alloc_samples = dive->alloc_samples;
77 struct sample *sample;
78 if (nr >= alloc_samples) {
81 alloc_samples = (alloc_samples * 3)/2 + 10;
82 size = dive_size(alloc_samples);
83 dive = realloc(dive, size);
86 dive->alloc_samples = alloc_samples;
89 sample = dive->sample + nr;
90 memset(sample, 0, sizeof(*sample));
96 void finish_sample(struct dive *dive, struct sample *sample)
102 * So when we re-calculate maxdepth and meandepth, we will
103 * not override the old numbers if they are close to the
106 * Why? Because a dive computer may well actually track the
107 * max depth and mean depth at finer granularity than the
108 * samples it stores. So it's possible that the max and mean
109 * have been reported more correctly originally.
111 * Only if the values calculated from the samples are clearly
112 * different do we override the normal depth values.
114 * This considers 1m to be "clearly different". That's
115 * a totally random number.
117 static void update_depth(depth_t *depth, int new)
122 if (abs(old - new) > 1000)
127 static void update_duration(duration_t *duration, int new)
130 duration->seconds = new;
133 static void update_temperature(temperature_t *temperature, int new)
136 int old = temperature->mkelvin;
138 if (abs(old - new) > 1000)
139 temperature->mkelvin = new;
144 * If you have more than 32 cylinders, you'd better have a 64-bit build.
145 * And if you have more than 64 cylinders, you need to use another tool,
146 * or fix this up to do something odd.
148 static unsigned long fixup_pressure(struct dive *dive, struct sample *sample, unsigned long flags)
151 unsigned int pressure, index;
154 pressure = sample->cylinderpressure.mbar;
157 index = sample->cylinderindex;
158 if (index >= MAX_CYLINDERS)
160 cyl = dive->cylinder + index;
161 if (!cyl->start.mbar)
162 cyl->start.mbar = pressure;
164 * If we already have an end pressure, without
165 * ever having seen a sample for this cylinder,
166 * that means that somebody set the end pressure
176 /* we need to handle the user entering beginning and end tank pressures
177 * - maybe even IF we have samples. But for now if we have air pressure
178 * data in the samples, we use that instead of the minimum
179 * if (!cyl->end.mbar || pressure < cyl->end.mbar)
181 cyl->end.mbar = pressure;
185 struct dive *fixup_dive(struct dive *dive)
188 double depthtime = 0;
190 int start = -1, end = -1;
191 int maxdepth = 0, mintemp = 0;
194 unsigned long flags = 0;
196 for (i = 0; i < dive->samples; i++) {
197 struct sample *sample = dive->sample + i;
198 int time = sample->time.seconds;
199 int depth = sample->depth.mm;
200 int temp = sample->temperature.mkelvin;
208 if (depth > maxdepth)
212 flags = fixup_pressure(dive, sample, flags);
216 * If we have consecutive identical
217 * temperature readings, throw away
218 * the redundant ones.
220 if (lasttemp == temp)
221 sample->temperature.mkelvin = 0;
225 if (!mintemp || temp < mintemp)
228 depthtime += (time - lasttime) * (lastdepth + depth) / 2;
235 update_duration(&dive->duration, end - start);
237 depthtime /= (end - start);
239 update_depth(&dive->meandepth, depthtime);
240 update_temperature(&dive->watertemp, mintemp);
241 update_depth(&dive->maxdepth, maxdepth);
243 add_people(dive->buddy);
244 add_people(dive->divemaster);
245 add_location(dive->location);
246 for (i = 0; i < MAX_CYLINDERS; i++) {
247 cylinder_type_t *type = &dive->cylinder[i].type;
248 add_cylinder_description(type);
254 /* Don't pick a zero for MERGE_MIN() */
255 #define MERGE_MAX(res, a, b, n) res->n = MAX(a->n, b->n)
256 #define MERGE_MIN(res, a, b, n) res->n = (a->n)?(b->n)?MIN(a->n, b->n):(a->n):(b->n)
257 #define MERGE_TXT(res, a, b, n) res->n = merge_text(a->n, b->n)
258 #define MERGE_NONZERO(res, a, b, n) res->n = a->n ? a->n : b->n
260 static struct dive *add_sample(struct sample *sample, int time, struct dive *dive)
262 struct sample *p = prepare_sample(&dive);
267 p->time.seconds = time;
268 finish_sample(dive, p);
273 * Merge samples. Dive 'a' is "offset" seconds before Dive 'b'
275 static struct dive *merge_samples(struct dive *res, struct dive *a, struct dive *b, int offset)
277 int asamples = a->samples;
278 int bsamples = b->samples;
279 struct sample *as = a->sample;
280 struct sample *bs = b->sample;
284 struct sample sample;
289 at = asamples ? as->time.seconds : -1;
290 bt = bsamples ? bs->time.seconds + offset : -1;
292 /* No samples? All done! */
293 if (at < 0 && bt < 0)
294 return fixup_dive(res);
296 /* Only samples from a? */
299 res = add_sample(as, at, res);
305 /* Only samples from b? */
308 res = add_sample(bs, bt, res);
319 /* same-time sample: add a merged sample. Take the non-zero ones */
322 sample.depth = as->depth;
323 if (as->temperature.mkelvin)
324 sample.temperature = as->temperature;
325 if (as->cylinderpressure.mbar)
326 sample.cylinderpressure = as->cylinderpressure;
327 if (as->cylinderindex)
328 sample.cylinderindex = as->cylinderindex;
330 res = add_sample(&sample, at, res);
339 static char *merge_text(const char *a, const char *b)
349 res = malloc(strlen(a) + strlen(b) + 9);
352 sprintf(res, "(%s) or (%s)", a, b);
356 #define SORT(a,b,field) \
357 if (a->field != b->field) return a->field < b->field ? -1 : 1
359 static int sort_event(struct event *a, struct event *b)
361 SORT(a,b,time.seconds);
365 return strcmp(a->name, b->name);
368 static void merge_events(struct dive *res, struct dive *src1, struct dive *src2, int offset)
371 struct event **p = &res->events;
376 b->time.seconds += offset;
391 s = sort_event(a, b);
399 /* Pick 'a' or neither */
409 /* Pick whichever has any info (if either). Prefer 'a' */
410 static void merge_cylinder_type(cylinder_type_t *res, cylinder_type_t *a, cylinder_type_t *b)
417 static void merge_cylinder_mix(struct gasmix *res, struct gasmix *a, struct gasmix *b)
424 static void merge_cylinder_info(cylinder_t *res, cylinder_t *a, cylinder_t *b)
426 merge_cylinder_type(&res->type, &a->type, &b->type);
427 merge_cylinder_mix(&res->gasmix, &a->gasmix, &b->gasmix);
428 MERGE_MAX(res, a, b, start.mbar);
429 MERGE_MIN(res, a, b, end.mbar);
433 * This could do a lot more merging. Right now it really only
434 * merges almost exact duplicates - something that happens easily
435 * with overlapping dive downloads.
437 struct dive *try_to_merge(struct dive *a, struct dive *b)
442 if ((a->when >= b->when + 60) || (a->when <= b->when - 60))
448 MERGE_NONZERO(res, a, b, latitude);
449 MERGE_NONZERO(res, a, b, longitude);
450 MERGE_TXT(res, a, b, location);
451 MERGE_TXT(res, a, b, notes);
452 MERGE_TXT(res, a, b, buddy);
453 MERGE_TXT(res, a, b, divemaster);
454 MERGE_MAX(res, a, b, number);
455 MERGE_MAX(res, a, b, maxdepth.mm);
456 res->meandepth.mm = 0;
457 MERGE_MAX(res, a, b, duration.seconds);
458 MERGE_MAX(res, a, b, surfacetime.seconds);
459 MERGE_MAX(res, a, b, airtemp.mkelvin);
460 MERGE_MIN(res, a, b, watertemp.mkelvin);
461 for (i = 0; i < MAX_CYLINDERS; i++)
462 merge_cylinder_info(res->cylinder+i, a->cylinder + i, b->cylinder + i);
463 merge_events(res, a, b, 0);
464 return merge_samples(res, a, b, 0);