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e03b553e80
Having random uuids seemed like a good idea, but there are several situations where they really cause problems. One is merging dive file imports from V2 logfiles. Another is testing such imports. Instead of making the uuid random we now hash the name and add the timestamp of the first dive associated with this dive site to the hash (first in this context is "first encountered" with no guarantee that it is the chronologically first). This way V2 imports create deterministic uuids but uuid conflicts are still extremely unlikely, even if the user has multiple dive sites with the same name. Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
414 lines
10 KiB
C
414 lines
10 KiB
C
#include <string.h>
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#include "dive.h"
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#include "divelist.h"
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#include "file.h"
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#include "strndup.h"
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// Convert bytes into an INT
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#define array_uint16_le(p) ((unsigned int) (p)[0] \
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+ ((p)[1]<<8) )
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#define array_uint32_le(p) ((unsigned int) (p)[0] \
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+ ((p)[1]<<8) + ((p)[2]<<16) \
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+ ((p)[3]<<24))
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struct lv_event {
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time_t time;
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struct pressure {
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int sensor;
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int mbar;
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} pressure;
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};
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uint16_t primary_sensor;
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static int handle_event_ver2(int code, const unsigned char *ps, unsigned int ps_ptr, struct lv_event *event)
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{
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// Skip 4 bytes
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return 4;
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}
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static int handle_event_ver3(int code, const unsigned char *ps, unsigned int ps_ptr, struct lv_event *event)
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{
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int skip = 4;
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uint16_t current_sensor;
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switch (code) {
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case 0x0002: // Unknown
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case 0x0004: // Unknown
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skip = 4;
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break;
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case 0x0005: // Unknown
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skip = 6;
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break;
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case 0x0007: // Gas
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// 4 byte time
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// 1 byte O2, 1 bye He
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skip = 6;
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break;
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case 0x0008:
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// 4 byte time
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// 2 byte gas set point 2
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skip = 6;
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break;
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case 0x000f:
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// Tank pressure
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event->time = array_uint32_le(ps + ps_ptr);
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/* As far as I know, Liquivision supports 2 sensors, own and buddie's. This is my
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* best guess how it is represented. */
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current_sensor = array_uint16_le(ps + ps_ptr + 4);
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if (primary_sensor == 0) {
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primary_sensor = current_sensor;
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}
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if (current_sensor == primary_sensor) {
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event->pressure.sensor = 0;
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event->pressure.mbar = array_uint16_le(ps + ps_ptr + 6) * 10; // cb->mb
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} else {
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/* Ignoring the buddy sensor for no as we cannot draw it on the profile.
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event->pressure.sensor = 1;
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event->pressure.mbar = array_uint16_le(ps + ps_ptr + 6) * 10; // cb->mb
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*/
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}
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// 1 byte PSR
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// 1 byte ST
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skip = 10;
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break;
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case 0x0010:
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skip = 26;
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break;
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case 0x0015: // Unknown
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skip = 2;
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break;
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default:
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skip = 4;
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break;
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}
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return skip;
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}
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static void parse_dives (int log_version, const unsigned char *buf, unsigned int buf_size)
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{
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unsigned int ptr = 0;
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unsigned char model;
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struct dive *dive;
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struct divecomputer *dc;
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struct sample *sample;
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while (ptr < buf_size) {
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int i;
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bool found_divesite = false;
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dive = alloc_dive();
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primary_sensor = 0;
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dc = &dive->dc;
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/* Just the main cylinder until we can handle the buddy cylinder porperly */
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for (i = 0; i < 1; i++)
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fill_default_cylinder(&dive->cylinder[i]);
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// Model 0=Xen, 1,2=Xeo, 4=Lynx, other=Liquivision
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model = *(buf + ptr);
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switch (model) {
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case 0:
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dc->model = "Xen";
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break;
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case 1:
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case 2:
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dc->model = "Xeo";
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break;
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case 4:
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dc->model = "Lynx";
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break;
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default:
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dc->model = "Liquivision";
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break;
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}
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ptr++;
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// Dive location, assemble Location and Place
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unsigned int len, place_len;
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char *location;
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len = array_uint32_le(buf + ptr);
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ptr += 4;
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place_len = array_uint32_le(buf + ptr + len);
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if (len && place_len) {
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location = malloc(len + place_len + 4);
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memset(location, 0, len + place_len + 4);
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memcpy(location, buf + ptr, len);
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memcpy(location + len, ", ", 2);
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memcpy(location + len + 2, buf + ptr + len + 4, place_len);
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} else if (len) {
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location = strndup((char *)buf + ptr, len);
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} else if (place_len) {
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location = strndup((char *)buf + ptr + len + 4, place_len);
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}
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/* Store the location only if we have one */
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if (len || place_len)
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found_divesite = true;
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ptr += len + 4 + place_len;
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// Dive comment
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len = array_uint32_le(buf + ptr);
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ptr += 4;
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// Blank notes are better than the default text
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if (len && strncmp((char *)buf + ptr, "Comment ...", 11)) {
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dive->notes = strndup((char *)buf + ptr, len);
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}
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ptr += len;
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dive->id = array_uint32_le(buf + ptr);
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ptr += 4;
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dive->number = array_uint16_le(buf + ptr) + 1;
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ptr += 2;
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dive->duration.seconds = array_uint32_le(buf + ptr); // seconds
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ptr += 4;
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dive->maxdepth.mm = array_uint16_le(buf + ptr) * 10; // cm->mm
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ptr += 2;
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dive->meandepth.mm = array_uint16_le(buf + ptr) * 10; // cm->mm
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ptr += 2;
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dive->when = array_uint32_le(buf + ptr);
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ptr += 4;
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// now that we have the dive time we can store the divesite
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// (we need the dive time to create deterministic uuids)
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if (found_divesite) {
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dive->dive_site_uuid = find_or_create_dive_site_with_name(location, dive->when);
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free(location);
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}
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//unsigned int end_time = array_uint32_le(buf + ptr);
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ptr += 4;
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//unsigned int sit = array_uint32_le(buf + ptr);
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ptr += 4;
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//if (sit == 0xffffffff) {
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//}
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dive->surface_pressure.mbar = array_uint16_le(buf + ptr); // ???
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ptr += 2;
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//unsigned int rep_dive = array_uint16_le(buf + ptr);
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ptr += 2;
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dive->mintemp.mkelvin = C_to_mkelvin((float)array_uint16_le(buf + ptr)/10);// C->mK
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ptr += 2;
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dive->maxtemp.mkelvin = C_to_mkelvin((float)array_uint16_le(buf + ptr)/10);// C->mK
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ptr += 2;
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dive->salinity = *(buf + ptr); // ???
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ptr += 1;
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unsigned int sample_count = array_uint32_le(buf + ptr);
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ptr += 4;
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// Sample interval
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unsigned char sample_interval;
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sample_interval = 1;
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unsigned char intervals[6] = {1,2,5,10,30,60};
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if (*(buf + ptr) < 6)
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sample_interval = intervals[*(buf + ptr)];
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ptr += 1;
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float start_cns = 0;
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unsigned char dive_mode = 0, algorithm = 0;
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if (array_uint32_le(buf + ptr) != sample_count) {
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// Xeo, with CNS and OTU
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start_cns = *(float *) (buf + ptr);
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ptr += 4;
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dive->cns = *(float *) (buf + ptr); // end cns
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ptr += 4;
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dive->otu = *(float *) (buf + ptr);
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ptr += 4;
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dive_mode = *(buf + ptr++); // 0=Deco, 1=Gauge, 2=None
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algorithm = *(buf + ptr++); // 0=ZH-L16C+GF
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sample_count = array_uint32_le(buf + ptr);
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}
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// we aren't using the start_cns, dive_mode, and algorithm, yet
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(void)start_cns;
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(void)dive_mode;
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(void)algorithm;
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ptr += 4;
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// Parse dive samples
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const unsigned char *ds = buf + ptr;
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const unsigned char *ts = buf + ptr + sample_count * 2 + 4;
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const unsigned char *ps = buf + ptr + sample_count * 4 + 4;
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unsigned int ps_count = array_uint32_le(ps);
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ps += 4;
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// Bump ptr
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ptr += sample_count * 4 + 4;
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// Handle events
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unsigned int ps_ptr;
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ps_ptr = 0;
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unsigned int event_code, d = 0, e;
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struct lv_event event;
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// Loop through events
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for (e = 0; e < ps_count; e++) {
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// Get event
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event_code = array_uint16_le(ps + ps_ptr);
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ps_ptr += 2;
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if (log_version == 3) {
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ps_ptr += handle_event_ver3(event_code, ps, ps_ptr, &event);
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if (event_code != 0xf)
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continue; // ignore all by pressure sensor event
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} else { // version 2
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ps_ptr += handle_event_ver2(event_code, ps, ps_ptr, &event);
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continue; // ignore all events
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}
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int sample_time, last_time;
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int depth_mm, last_depth, temp_mk, last_temp;
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while (true) {
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sample = prepare_sample(dc);
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// Get sample times
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sample_time = d * sample_interval;
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depth_mm = array_uint16_le(ds + d * 2) * 10; // cm->mm
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temp_mk = C_to_mkelvin((float)array_uint16_le(ts + d * 2) / 10); // dC->mK
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last_time = (d ? (d - 1) * sample_interval : 0);
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if (d == sample_count) {
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// We still have events to record
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sample->time.seconds = event.time;
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sample->depth.mm = array_uint16_le(ds + (d - 1) * 2) * 10; // cm->mm
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sample->temperature.mkelvin = C_to_mkelvin((float) array_uint16_le(ts + (d - 1) * 2) / 10); // dC->mK
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sample->sensor = event.pressure.sensor;
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sample->cylinderpressure.mbar = event.pressure.mbar;
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finish_sample(dc);
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break;
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} else if (event.time > sample_time) {
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// Record sample and loop
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sample->time.seconds = sample_time;
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sample->depth.mm = depth_mm;
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sample->temperature.mkelvin = temp_mk;
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finish_sample(dc);
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d++;
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continue;
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} else if (event.time == sample_time) {
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sample->time.seconds = sample_time;
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sample->depth.mm = depth_mm;
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sample->temperature.mkelvin = temp_mk;
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sample->sensor = event.pressure.sensor;
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sample->cylinderpressure.mbar = event.pressure.mbar;
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finish_sample(dc);
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break;
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} else { // Event is prior to sample
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sample->time.seconds = event.time;
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sample->sensor = event.pressure.sensor;
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sample->cylinderpressure.mbar = event.pressure.mbar;
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if (last_time == sample_time) {
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sample->depth.mm = depth_mm;
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sample->temperature.mkelvin = temp_mk;
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} else {
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// Extrapolate
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last_depth = array_uint16_le(ds + (d - 1) * 2) * 10; // cm->mm
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last_temp = C_to_mkelvin((float) array_uint16_le(ts + (d - 1) * 2) / 10); // dC->mK
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sample->depth.mm = last_depth + (depth_mm - last_depth)
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* (event.time - last_time) / sample_interval;
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sample->temperature.mkelvin = last_temp + (temp_mk - last_temp)
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* (event.time - last_time) / sample_interval;
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}
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finish_sample(dc);
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break;
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}
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} // while (true);
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} // for each event sample
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// record trailing depth samples
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for ( ;d < sample_count; d++) {
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sample = prepare_sample(dc);
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sample->time.seconds = d * sample_interval;
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sample->depth.mm = array_uint16_le(ds + d * 2) * 10; // cm->mm
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sample->temperature.mkelvin =
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C_to_mkelvin((float)array_uint16_le(ts + d * 2) / 10);
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finish_sample(dc);
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}
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if (log_version == 3 && model == 4) {
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// Advance to begin of next dive
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switch (array_uint16_le(ps + ps_ptr)) {
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case 0x0000:
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ps_ptr += 5;
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break;
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case 0x0100:
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ps_ptr += 7;
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break;
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case 0x0200:
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ps_ptr += 9;
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break;
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case 0x0300:
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ps_ptr += 11;
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break;
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case 0x0b0b:
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ps_ptr += 27;
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break;
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}
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while (*(ps + ps_ptr) != 0x04)
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ps_ptr++;
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}
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// End dive
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dive->downloaded = true;
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record_dive(dive);
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mark_divelist_changed(true);
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// Advance ptr for next dive
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ptr += ps_ptr + 4;
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} // while
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//DEBUG save_dives("/tmp/test.xml");
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}
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int try_to_open_liquivision(const char *filename, struct memblock *mem)
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{
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const unsigned char *buf = mem->buffer;
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unsigned int buf_size = mem->size;
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unsigned int ptr;
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int log_version;
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// Get name length
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unsigned int len = array_uint32_le(buf);
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// Ignore length field and the name
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ptr = 4 + len;
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unsigned int dive_count = array_uint32_le(buf + ptr);
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if (dive_count == 0xffffffff) {
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// File version 3.0
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log_version = 3;
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ptr += 6;
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dive_count = array_uint32_le(buf + ptr);
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} else {
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log_version = 2;
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}
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ptr += 4;
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parse_dives(log_version, buf + ptr, buf_size - ptr);
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return 1;
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}
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