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;
32 int get_pressure_units(unsigned int mb, const char **units)
37 switch (output_units.pressure) {
43 pressure = (mb + 500) / 1000;
47 pressure = mbar_to_PSI(mb);
56 double get_temp_units(unsigned int mk, const char **units)
61 if (output_units.temperature == FAHRENHEIT) {
62 deg = mkelvin_to_F(mk);
63 unit = UTF8_DEGREE "F";
65 deg = mkelvin_to_C(mk);
66 unit = UTF8_DEGREE "C";
73 double get_volume_units(unsigned int ml, int *frac, const char **units)
79 switch (output_units.volume) {
98 double get_depth_units(unsigned int mm, int *frac, const char **units)
104 switch (output_units.length) {
123 struct dive *alloc_dive(void)
125 const int initial_samples = 5;
129 size = dive_size(initial_samples);
133 memset(dive, 0, size);
134 dive->alloc_samples = initial_samples;
138 struct sample *prepare_sample(struct dive **divep)
140 struct dive *dive = *divep;
142 int nr = dive->samples;
143 int alloc_samples = dive->alloc_samples;
144 struct sample *sample;
145 if (nr >= alloc_samples) {
148 alloc_samples = (alloc_samples * 3)/2 + 10;
149 size = dive_size(alloc_samples);
150 dive = realloc(dive, size);
153 dive->alloc_samples = alloc_samples;
156 sample = dive->sample + nr;
157 memset(sample, 0, sizeof(*sample));
163 void finish_sample(struct dive *dive)
169 * So when we re-calculate maxdepth and meandepth, we will
170 * not override the old numbers if they are close to the
173 * Why? Because a dive computer may well actually track the
174 * max depth and mean depth at finer granularity than the
175 * samples it stores. So it's possible that the max and mean
176 * have been reported more correctly originally.
178 * Only if the values calculated from the samples are clearly
179 * different do we override the normal depth values.
181 * This considers 1m to be "clearly different". That's
182 * a totally random number.
184 static void update_depth(depth_t *depth, int new)
189 if (abs(old - new) > 1000)
194 static void update_duration(duration_t *duration, int new)
197 duration->seconds = new;
200 static void update_temperature(temperature_t *temperature, int new)
203 int old = temperature->mkelvin;
205 if (abs(old - new) > 1000)
206 temperature->mkelvin = new;
210 static void fixup_pressure(struct dive *dive, struct sample *sample)
212 unsigned int pressure, index;
215 pressure = sample->cylinderpressure.mbar;
218 index = sample->cylinderindex;
219 if (index >= MAX_CYLINDERS)
221 cyl = dive->cylinder + index;
222 if (!cyl->sample_start.mbar)
223 cyl->sample_start.mbar = pressure;
224 cyl->sample_end.mbar = pressure;
228 * If the cylinder tank pressures are within half a bar
229 * (about 8 PSI) of the sample pressures, we consider it
230 * to be a rounding error, and throw them away as redundant.
232 static int same_rounded_pressure(pressure_t a, pressure_t b)
234 return abs(a.mbar - b.mbar) <= 500;
237 static void sanitize_gasmix(struct gasmix *mix)
241 o2 = mix->o2.permille;
242 he = mix->he.permille;
244 /* Regular air: leave empty */
248 /* 20.9% or 21% O2 is just air */
249 if (o2 >= 209 && o2 <= 210) {
250 mix->o2.permille = 0;
256 if (o2 <= 1000 && he <= 1000 && o2+he <= 1000)
258 fprintf(stderr, "Odd gasmix: %d O2 %d He\n", o2, he);
259 memset(mix, 0, sizeof(*mix));
263 * See if the size/workingpressure looks like some standard cylinder
266 static void match_standard_cylinder(cylinder_type_t *type)
273 /* Do we already have a cylinder description? */
274 if (type->description)
277 cuft = ml_to_cuft(type->size.mliter);
278 cuft *= to_ATM(type->workingpressure);
279 psi = to_PSI(type->workingpressure);
282 case 2300 ... 2500: /* 2400 psi: LP tank */
285 case 2600 ... 2700: /* 2640 psi: LP+10% */
288 case 2900 ... 3100: /* 3000 psi: ALx tank */
291 case 3400 ... 3500: /* 3442 psi: HP tank */
294 case 3700 ... 3850: /* HP+10% */
300 len = snprintf(buffer, sizeof(buffer), fmt, (int) (cuft+0.5));
304 memcpy(p, buffer, len+1);
305 type->description = p;
310 * There are two ways to give cylinder size information:
311 * - total amount of gas in cuft (depends on working pressure and physical size)
314 * where "physical size" is the one that actually matters and is sane.
316 * We internally use physical size only. But we save the workingpressure
317 * so that we can do the conversion if required.
319 static void sanitize_cylinder_type(cylinder_type_t *type)
321 double volume_of_air, atm, volume;
323 /* If we have no working pressure, it had *better* be just a physical size! */
324 if (!type->workingpressure.mbar)
327 /* No size either? Nothing to go on */
328 if (!type->size.mliter)
331 if (input_units.volume == CUFT) {
332 /* confusing - we don't really start from ml but millicuft !*/
333 volume_of_air = cuft_to_l(type->size.mliter);
334 atm = to_ATM(type->workingpressure); /* working pressure in atm */
335 volume = volume_of_air / atm; /* milliliters at 1 atm: "true size" */
336 type->size.mliter = volume + 0.5;
339 /* Ok, we have both size and pressure: try to match a description */
340 match_standard_cylinder(type);
343 static void sanitize_cylinder_info(struct dive *dive)
347 for (i = 0; i < MAX_CYLINDERS; i++) {
348 sanitize_gasmix(&dive->cylinder[i].gasmix);
349 sanitize_cylinder_type(&dive->cylinder[i].type);
353 struct dive *fixup_dive(struct dive *dive)
356 double depthtime = 0;
359 int start = -1, end = -1;
360 int maxdepth = 0, mintemp = 0;
362 int lasttemp = 0, lastpressure = 0;
363 int pressure_delta[MAX_CYLINDERS] = {INT_MAX, };
365 sanitize_cylinder_info(dive);
366 for (i = 0; i < dive->samples; i++) {
367 struct sample *sample = dive->sample + i;
368 int time = sample->time.seconds;
369 int depth = sample->depth.mm;
370 int temp = sample->temperature.mkelvin;
371 int pressure = sample->cylinderpressure.mbar;
372 int index = sample->cylinderindex;
374 if (index == lastindex) {
375 /* Remove duplicate redundant pressure information */
376 if (pressure == lastpressure)
377 sample->cylinderpressure.mbar = 0;
378 /* check for simply linear data in the samples
379 +INT_MAX means uninitialized, -INT_MAX means not linear */
380 if (pressure_delta[index] != -INT_MAX && lastpressure) {
381 if (pressure_delta[index] == INT_MAX) {
382 pressure_delta[index] = abs(pressure - lastpressure);
384 int cur_delta = abs(pressure - lastpressure);
385 if (cur_delta && abs(cur_delta - pressure_delta[index]) > 150) {
386 /* ok the samples aren't just a linearisation
387 * between start and end */
388 pressure_delta[index] = -INT_MAX;
394 lastpressure = pressure;
402 if (depth > maxdepth)
406 fixup_pressure(dive, sample);
410 * If we have consecutive identical
411 * temperature readings, throw away
412 * the redundant ones.
414 if (lasttemp == temp)
415 sample->temperature.mkelvin = 0;
419 if (!mintemp || temp < mintemp)
422 depthtime += (time - lasttime) * (lastdepth + depth) / 2;
426 /* if all the samples for a cylinder have pressure data that
427 * is basically equidistant throw out the sample cylinder pressure
428 * information but make sure we still have a valid start and end
430 * this happens when DivingLog decides to linearalize the
431 * pressure between beginning and end and for strange reasons
432 * decides to put that in the sample data as if it came from
433 * the dive computer; we don't want that (we'll visualize with
434 * constant SAC rate instead)
435 * WARNING WARNING - I have only seen this in single tank dives
436 * --- maybe I should try to create a multi tank dive and see what
437 * --- divinglog does there - but the code right now is only tested
438 * --- for the single tank case */
439 for (j = 0; j < MAX_CYLINDERS; j++) {
440 if (abs(pressure_delta[j]) != INT_MAX) {
441 cylinder_t *cyl = dive->cylinder + j;
442 for (i = 0; i < dive->samples; i++)
443 if (dive->sample[i].cylinderindex == j)
444 dive->sample[i].cylinderpressure.mbar = 0;
445 if (! cyl->start.mbar)
446 cyl->start.mbar = cyl->sample_start.mbar;
448 cyl->end.mbar = cyl->sample_end.mbar;
449 cyl->sample_start.mbar = 0;
450 cyl->sample_end.mbar = 0;
456 update_duration(&dive->duration, end - start);
458 depthtime /= (end - start);
460 update_depth(&dive->meandepth, depthtime);
461 update_temperature(&dive->watertemp, mintemp);
462 update_depth(&dive->maxdepth, maxdepth);
464 add_people(dive->buddy);
465 add_people(dive->divemaster);
466 add_location(dive->location);
467 for (i = 0; i < MAX_CYLINDERS; i++) {
468 cylinder_t *cyl = dive->cylinder + i;
469 add_cylinder_description(&cyl->type);
470 if (same_rounded_pressure(cyl->sample_start, cyl->start))
472 if (same_rounded_pressure(cyl->sample_end, cyl->end))
479 /* Don't pick a zero for MERGE_MIN() */
480 #define MERGE_MAX(res, a, b, n) res->n = MAX(a->n, b->n)
481 #define MERGE_MIN(res, a, b, n) res->n = (a->n)?(b->n)?MIN(a->n, b->n):(a->n):(b->n)
482 #define MERGE_TXT(res, a, b, n) res->n = merge_text(a->n, b->n)
483 #define MERGE_NONZERO(res, a, b, n) res->n = a->n ? a->n : b->n
485 static struct dive *add_sample(struct sample *sample, int time, struct dive *dive)
487 struct sample *p = prepare_sample(&dive);
492 p->time.seconds = time;
498 * Merge samples. Dive 'a' is "offset" seconds before Dive 'b'
500 static struct dive *merge_samples(struct dive *res, struct dive *a, struct dive *b, int offset)
502 int asamples = a->samples;
503 int bsamples = b->samples;
504 struct sample *as = a->sample;
505 struct sample *bs = b->sample;
509 struct sample sample;
514 at = asamples ? as->time.seconds : -1;
515 bt = bsamples ? bs->time.seconds + offset : -1;
517 /* No samples? All done! */
518 if (at < 0 && bt < 0)
519 return fixup_dive(res);
521 /* Only samples from a? */
524 res = add_sample(as, at, res);
530 /* Only samples from b? */
533 res = add_sample(bs, bt, res);
544 /* same-time sample: add a merged sample. Take the non-zero ones */
547 sample.depth = as->depth;
548 if (as->temperature.mkelvin)
549 sample.temperature = as->temperature;
550 if (as->cylinderpressure.mbar)
551 sample.cylinderpressure = as->cylinderpressure;
552 if (as->cylinderindex)
553 sample.cylinderindex = as->cylinderindex;
555 res = add_sample(&sample, at, res);
564 static char *merge_text(const char *a, const char *b)
574 res = malloc(strlen(a) + strlen(b) + 9);
577 sprintf(res, "(%s) or (%s)", a, b);
581 #define SORT(a,b,field) \
582 if (a->field != b->field) return a->field < b->field ? -1 : 1
584 static int sort_event(struct event *a, struct event *b)
586 SORT(a,b,time.seconds);
590 return strcmp(a->name, b->name);
593 static void merge_events(struct dive *res, struct dive *src1, struct dive *src2, int offset)
596 struct event **p = &res->events;
601 b->time.seconds += offset;
616 s = sort_event(a, b);
624 /* Pick 'a' or neither */
634 /* Pick whichever has any info (if either). Prefer 'a' */
635 static void merge_cylinder_type(cylinder_type_t *res, cylinder_type_t *a, cylinder_type_t *b)
642 static void merge_cylinder_mix(struct gasmix *res, struct gasmix *a, struct gasmix *b)
649 static void merge_cylinder_info(cylinder_t *res, cylinder_t *a, cylinder_t *b)
651 merge_cylinder_type(&res->type, &a->type, &b->type);
652 merge_cylinder_mix(&res->gasmix, &a->gasmix, &b->gasmix);
653 MERGE_MAX(res, a, b, start.mbar);
654 MERGE_MIN(res, a, b, end.mbar);
658 * This could do a lot more merging. Right now it really only
659 * merges almost exact duplicates - something that happens easily
660 * with overlapping dive downloads.
662 struct dive *try_to_merge(struct dive *a, struct dive *b)
667 if ((a->when >= b->when + 60) || (a->when <= b->when - 60))
673 MERGE_NONZERO(res, a, b, latitude);
674 MERGE_NONZERO(res, a, b, longitude);
675 MERGE_TXT(res, a, b, location);
676 MERGE_TXT(res, a, b, notes);
677 MERGE_TXT(res, a, b, buddy);
678 MERGE_TXT(res, a, b, divemaster);
679 MERGE_MAX(res, a, b, rating);
680 MERGE_MAX(res, a, b, number);
681 MERGE_MAX(res, a, b, maxdepth.mm);
682 res->meandepth.mm = 0;
683 MERGE_MAX(res, a, b, duration.seconds);
684 MERGE_MAX(res, a, b, surfacetime.seconds);
685 MERGE_MAX(res, a, b, airtemp.mkelvin);
686 MERGE_MIN(res, a, b, watertemp.mkelvin);
687 for (i = 0; i < MAX_CYLINDERS; i++)
688 merge_cylinder_info(res->cylinder+i, a->cylinder + i, b->cylinder + i);
689 merge_events(res, a, b, 0);
690 return merge_samples(res, a, b, 0);