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-rw-r--r--subsurface-core/divesite.c337
1 files changed, 337 insertions, 0 deletions
diff --git a/subsurface-core/divesite.c b/subsurface-core/divesite.c
new file mode 100644
index 000000000..e9eed2a07
--- /dev/null
+++ b/subsurface-core/divesite.c
@@ -0,0 +1,337 @@
+/* divesite.c */
+#include "divesite.h"
+#include "dive.h"
+#include "divelist.h"
+
+#include <math.h>
+
+struct dive_site_table dive_site_table;
+
+/* there could be multiple sites of the same name - return the first one */
+uint32_t get_dive_site_uuid_by_name(const char *name, struct dive_site **dsp)
+{
+ int i;
+ struct dive_site *ds;
+ for_each_dive_site (i, ds) {
+ if (same_string(ds->name, name)) {
+ if (dsp)
+ *dsp = ds;
+ return ds->uuid;
+ }
+ }
+ return 0;
+}
+
+/* there could be multiple sites at the same GPS fix - return the first one */
+uint32_t get_dive_site_uuid_by_gps(degrees_t latitude, degrees_t longitude, struct dive_site **dsp)
+{
+ int i;
+ struct dive_site *ds;
+ for_each_dive_site (i, ds) {
+ if (ds->latitude.udeg == latitude.udeg && ds->longitude.udeg == longitude.udeg) {
+ if (dsp)
+ *dsp = ds;
+ return ds->uuid;
+ }
+ }
+ return 0;
+}
+
+
+/* to avoid a bug where we have two dive sites with different name and the same GPS coordinates
+ * and first get the gps coordinates (reading a V2 file) and happen to get back "the other" name,
+ * this function allows us to verify if a very specific name/GPS combination already exists */
+uint32_t get_dive_site_uuid_by_gps_and_name(char *name, degrees_t latitude, degrees_t longitude)
+{
+ int i;
+ struct dive_site *ds;
+ for_each_dive_site (i, ds) {
+ if (ds->latitude.udeg == latitude.udeg && ds->longitude.udeg == longitude.udeg && same_string(ds->name, name))
+ return ds->uuid;
+ }
+ return 0;
+}
+
+// Calculate the distance in meters between two coordinates.
+unsigned int get_distance(degrees_t lat1, degrees_t lon1, degrees_t lat2, degrees_t lon2)
+{
+ double lat2_r = udeg_to_radians(lat2.udeg);
+ double lat_d_r = udeg_to_radians(lat2.udeg-lat1.udeg);
+ double lon_d_r = udeg_to_radians(lon2.udeg-lon1.udeg);
+
+ double a = sin(lat_d_r/2) * sin(lat_d_r/2) +
+ cos(lat2_r) * cos(lat2_r) * sin(lon_d_r/2) * sin(lon_d_r/2);
+ double c = 2 * atan2(sqrt(a), sqrt(1.0 - a));
+
+ // Earth radious in metres
+ return 6371000 * c;
+}
+
+/* find the closest one, no more than distance meters away - if more than one at same distance, pick the first */
+uint32_t get_dive_site_uuid_by_gps_proximity(degrees_t latitude, degrees_t longitude, int distance, struct dive_site **dsp)
+{
+ int i;
+ int uuid = 0;
+ struct dive_site *ds;
+ unsigned int cur_distance, min_distance = distance;
+ for_each_dive_site (i, ds) {
+ if (dive_site_has_gps_location(ds) &&
+ (cur_distance = get_distance(ds->latitude, ds->longitude, latitude, longitude)) < min_distance) {
+ min_distance = cur_distance;
+ uuid = ds->uuid;
+ if (dsp)
+ *dsp = ds;
+ }
+ }
+ return uuid;
+}
+
+/* try to create a uniqe ID - fingers crossed */
+static uint32_t dive_site_getUniqId()
+{
+ uint32_t id = 0;
+
+ while (id == 0 || get_dive_site_by_uuid(id)) {
+ id = rand() & 0xff;
+ id |= (rand() & 0xff) << 8;
+ id |= (rand() & 0xff) << 16;
+ id |= (rand() & 0xff) << 24;
+ }
+
+ return id;
+}
+
+/* we never allow a second dive site with the same uuid */
+struct dive_site *alloc_or_get_dive_site(uint32_t uuid)
+{
+ struct dive_site *ds;
+ if (uuid) {
+ if ((ds = get_dive_site_by_uuid(uuid)) != NULL) {
+ fprintf(stderr, "PROBLEM: refusing to create dive site with the same uuid %08x\n", uuid);
+ return ds;
+ }
+ }
+ int nr = dive_site_table.nr;
+ int allocated = dive_site_table.allocated;
+ struct dive_site **sites = dive_site_table.dive_sites;
+
+ if (nr >= allocated) {
+ allocated = (nr + 32) * 3 / 2;
+ sites = realloc(sites, allocated * sizeof(struct dive_site *));
+ if (!sites)
+ exit(1);
+ dive_site_table.dive_sites = sites;
+ dive_site_table.allocated = allocated;
+ }
+ ds = calloc(1, sizeof(*ds));
+ if (!ds)
+ exit(1);
+ sites[nr] = ds;
+ dive_site_table.nr = nr + 1;
+ // we should always be called with a valid uuid except in the special
+ // case where we want to copy a dive site into the memory we allocated
+ // here - then we need to pass in 0 and create a temporary uuid here
+ // (just so things are always consistent)
+ if (uuid)
+ ds->uuid = uuid;
+ else
+ ds->uuid = dive_site_getUniqId();
+ return ds;
+}
+
+int nr_of_dives_at_dive_site(uint32_t uuid, bool select_only)
+{
+ int j;
+ int nr = 0;
+ struct dive *d;
+ for_each_dive(j, d) {
+ if (d->dive_site_uuid == uuid && (!select_only || d->selected)) {
+ nr++;
+ }
+ }
+ return nr;
+}
+
+bool is_dive_site_used(uint32_t uuid, bool select_only)
+{
+ int j;
+ bool found = false;
+ struct dive *d;
+ for_each_dive(j, d) {
+ if (d->dive_site_uuid == uuid && (!select_only || d->selected)) {
+ found = true;
+ break;
+ }
+ }
+ return found;
+}
+
+void delete_dive_site(uint32_t id)
+{
+ int nr = dive_site_table.nr;
+ for (int i = 0; i < nr; i++) {
+ struct dive_site *ds = get_dive_site(i);
+ if (ds->uuid == id) {
+ free(ds->name);
+ free(ds->notes);
+ free(ds);
+ if (nr - 1 > i)
+ memmove(&dive_site_table.dive_sites[i],
+ &dive_site_table.dive_sites[i+1],
+ (nr - 1 - i) * sizeof(dive_site_table.dive_sites[0]));
+ dive_site_table.nr = nr - 1;
+ break;
+ }
+ }
+}
+
+uint32_t create_divesite_uuid(const char *name, timestamp_t divetime)
+{
+ if (name == NULL)
+ name ="";
+ unsigned char hash[20];
+ SHA_CTX ctx;
+ SHA1_Init(&ctx);
+ SHA1_Update(&ctx, &divetime, sizeof(timestamp_t));
+ SHA1_Update(&ctx, name, strlen(name));
+ SHA1_Final(hash, &ctx);
+ // now return the first 32 of the 160 bit hash
+ return *(uint32_t *)hash;
+}
+
+/* allocate a new site and add it to the table */
+uint32_t create_dive_site(const char *name, timestamp_t divetime)
+{
+ uint32_t uuid = create_divesite_uuid(name, divetime);
+ struct dive_site *ds = alloc_or_get_dive_site(uuid);
+ ds->name = copy_string(name);
+
+ return uuid;
+}
+
+/* same as before, but with current time if no current_dive is present */
+uint32_t create_dive_site_from_current_dive(const char *name)
+{
+ if (current_dive != NULL) {
+ return create_dive_site(name, current_dive->when);
+ } else {
+ timestamp_t when;
+ time_t now = time(0);
+ when = utc_mktime(localtime(&now));
+ return create_dive_site(name, when);
+ }
+}
+
+/* same as before, but with GPS data */
+uint32_t create_dive_site_with_gps(const char *name, degrees_t latitude, degrees_t longitude, timestamp_t divetime)
+{
+ uint32_t uuid = create_divesite_uuid(name, divetime);
+ struct dive_site *ds = alloc_or_get_dive_site(uuid);
+ ds->name = copy_string(name);
+ ds->latitude = latitude;
+ ds->longitude = longitude;
+
+ return ds->uuid;
+}
+
+/* a uuid is always present - but if all the other fields are empty, the dive site is pointless */
+bool dive_site_is_empty(struct dive_site *ds)
+{
+ return same_string(ds->name, "") &&
+ same_string(ds->description, "") &&
+ same_string(ds->notes, "") &&
+ ds->latitude.udeg == 0 &&
+ ds->longitude.udeg == 0;
+}
+
+void copy_dive_site(struct dive_site *orig, struct dive_site *copy)
+{
+ free(copy->name);
+ free(copy->notes);
+ free(copy->description);
+
+ copy->latitude = orig->latitude;
+ copy->longitude = orig->longitude;
+ copy->name = copy_string(orig->name);
+ copy->notes = copy_string(orig->notes);
+ copy->description = copy_string(orig->description);
+ copy->uuid = orig->uuid;
+ if (orig->taxonomy.category == NULL) {
+ free_taxonomy(&copy->taxonomy);
+ } else {
+ if (copy->taxonomy.category == NULL)
+ copy->taxonomy.category = alloc_taxonomy();
+ for (int i = 0; i < TC_NR_CATEGORIES; i++) {
+ if (i < copy->taxonomy.nr)
+ free((void *)copy->taxonomy.category[i].value);
+ if (i < orig->taxonomy.nr) {
+ copy->taxonomy.category[i] = orig->taxonomy.category[i];
+ copy->taxonomy.category[i].value = copy_string(orig->taxonomy.category[i].value);
+ }
+ }
+ copy->taxonomy.nr = orig->taxonomy.nr;
+ }
+}
+
+void clear_dive_site(struct dive_site *ds)
+{
+ free(ds->name);
+ free(ds->notes);
+ free(ds->description);
+ ds->name = 0;
+ ds->notes = 0;
+ ds->description = 0;
+ ds->latitude.udeg = 0;
+ ds->longitude.udeg = 0;
+ ds->uuid = 0;
+ ds->taxonomy.nr = 0;
+ free_taxonomy(&ds->taxonomy);
+}
+
+void merge_dive_sites(uint32_t ref, uint32_t* uuids, int count)
+{
+ int curr_dive, i;
+ struct dive *d;
+ for(i = 0; i < count; i++){
+ if (uuids[i] == ref)
+ continue;
+
+ for_each_dive(curr_dive, d) {
+ if (d->dive_site_uuid != uuids[i] )
+ continue;
+ d->dive_site_uuid = ref;
+ }
+ }
+
+ for(i = 0; i < count; i++) {
+ if (uuids[i] == ref)
+ continue;
+ delete_dive_site(uuids[i]);
+ }
+ mark_divelist_changed(true);
+}
+
+uint32_t find_or_create_dive_site_with_name(const char *name, timestamp_t divetime)
+{
+ int i;
+ struct dive_site *ds;
+ for_each_dive_site(i,ds) {
+ if (same_string(name, ds->name))
+ break;
+ }
+ if (ds)
+ return ds->uuid;
+ return create_dive_site(name, divetime);
+}
+
+static int compare_sites(const void *_a, const void *_b)
+{
+ const struct dive_site *a = (const struct dive_site *)*(void **)_a;
+ const struct dive_site *b = (const struct dive_site *)*(void **)_b;
+ return a->uuid > b->uuid ? 1 : a->uuid == b->uuid ? 0 : -1;
+}
+
+void dive_site_table_sort()
+{
+ qsort(dive_site_table.dive_sites, dive_site_table.nr, sizeof(struct dive_site *), compare_sites);
+}
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