+static void date_data_func(GtkTreeViewColumn *col,
+ GtkCellRenderer *renderer,
+ GtkTreeModel *model,
+ GtkTreeIter *iter,
+ gpointer data)
+{
+ int val;
+ struct tm *tm;
+ time_t when;
+ char buffer[40];
+
+ gtk_tree_model_get(model, iter, DIVE_DATE, &val, -1);
+
+ /* 2038 problem */
+ when = val;
+
+ tm = gmtime(&when);
+ snprintf(buffer, sizeof(buffer),
+ "%s, %s %d, %d %02d:%02d",
+ weekday(tm->tm_wday),
+ monthname(tm->tm_mon),
+ tm->tm_mday, tm->tm_year + 1900,
+ tm->tm_hour, tm->tm_min);
+ g_object_set(renderer, "text", buffer, NULL);
+}
+
+static void depth_data_func(GtkTreeViewColumn *col,
+ GtkCellRenderer *renderer,
+ GtkTreeModel *model,
+ GtkTreeIter *iter,
+ gpointer data)
+{
+ int depth, integer, frac, len;
+ char buffer[40];
+
+ gtk_tree_model_get(model, iter, DIVE_DEPTH, &depth, -1);
+
+ switch (output_units.length) {
+ case METERS:
+ /* To tenths of meters */
+ depth = (depth + 49) / 100;
+ integer = depth / 10;
+ frac = depth % 10;
+ if (integer < 20)
+ break;
+ frac = -1;
+ /* Rounding? */
+ break;
+ case FEET:
+ integer = mm_to_feet(depth) + 0.5;
+ frac = -1;
+ break;
+ default:
+ return;
+ }
+ len = snprintf(buffer, sizeof(buffer), "%d", integer);
+ if (frac >= 0)
+ len += snprintf(buffer+len, sizeof(buffer)-len, ".%d", frac);
+
+ g_object_set(renderer, "text", buffer, NULL);
+}
+
+static void duration_data_func(GtkTreeViewColumn *col,
+ GtkCellRenderer *renderer,
+ GtkTreeModel *model,
+ GtkTreeIter *iter,
+ gpointer data)
+{
+ unsigned int sec;
+ char buffer[16];
+
+ gtk_tree_model_get(model, iter, DIVE_DURATION, &sec, -1);
+ snprintf(buffer, sizeof(buffer), "%d:%02d", sec / 60, sec % 60);
+
+ g_object_set(renderer, "text", buffer, NULL);
+}
+
+static void temperature_data_func(GtkTreeViewColumn *col,
+ GtkCellRenderer *renderer,
+ GtkTreeModel *model,
+ GtkTreeIter *iter,
+ gpointer data)
+{
+ int value;
+ char buffer[80];
+
+ gtk_tree_model_get(model, iter, DIVE_TEMPERATURE, &value, -1);
+
+ *buffer = 0;
+ if (value) {
+ double deg;
+ switch (output_units.temperature) {
+ case CELSIUS:
+ deg = mkelvin_to_C(value);
+ break;
+ case FAHRENHEIT:
+ deg = mkelvin_to_F(value);
+ break;
+ default:
+ return;
+ }
+ snprintf(buffer, sizeof(buffer), "%.1f", deg);
+ }
+
+ g_object_set(renderer, "text", buffer, NULL);
+}
+
+static void nitrox_data_func(GtkTreeViewColumn *col,
+ GtkCellRenderer *renderer,
+ GtkTreeModel *model,
+ GtkTreeIter *iter,
+ gpointer data)
+{
+ int value;
+ char buffer[80];
+
+ gtk_tree_model_get(model, iter, DIVE_NITROX, &value, -1);
+
+ if (value)
+ snprintf(buffer, sizeof(buffer), "%.1f", value/10.0);
+ else
+ strcpy(buffer, "air");
+
+ g_object_set(renderer, "text", buffer, NULL);
+}
+
+/* Render the SAC data (integer value of "ml / min") */
+static void sac_data_func(GtkTreeViewColumn *col,
+ GtkCellRenderer *renderer,
+ GtkTreeModel *model,
+ GtkTreeIter *iter,
+ gpointer data)
+{
+ int value;
+ const double liters_per_cuft = 28.317;
+ const char *fmt;
+ char buffer[16];
+ double sac;
+
+ gtk_tree_model_get(model, iter, DIVE_SAC, &value, -1);
+
+ if (!value) {
+ g_object_set(renderer, "text", "", NULL);
+ return;
+ }
+
+ sac = value / 1000.0;
+ switch (output_units.volume) {
+ case LITER:
+ fmt = "%4.1f";
+ break;
+ case CUFT:
+ fmt = "%4.2f";
+ sac /= liters_per_cuft;
+ break;
+ }
+ snprintf(buffer, sizeof(buffer), fmt, sac);
+
+ g_object_set(renderer, "text", buffer, NULL);
+}
+
+/* Render the OTU data (integer value of "OTU") */
+static void otu_data_func(GtkTreeViewColumn *col,
+ GtkCellRenderer *renderer,
+ GtkTreeModel *model,
+ GtkTreeIter *iter,
+ gpointer data)
+{
+ int value;
+ char buffer[16];
+
+ gtk_tree_model_get(model, iter, DIVE_OTU, &value, -1);
+
+ if (!value) {
+ g_object_set(renderer, "text", "", NULL);
+ return;
+ }
+
+ snprintf(buffer, sizeof(buffer), "%d", value);
+
+ g_object_set(renderer, "text", buffer, NULL);
+}
+
+/* calculate OTU for a dive */
+static int calculate_otu(struct dive *dive)