Move planner notes to separate file

Signed-off-by: Robert C. Helling <helling@atdotde.de>

1 files changed, 479 insertions, 0 deletions

diff --git a/core/plannernotes.c b/core/plannernotes.c
new file mode 100644
index 000000000..ea4955925
--- /dev/null
+++ b/core/plannernotes.c
@@ -0,0 +1,479 @@
+// SPDX-License-Identifier: GPL-2.0
+/* planner.c
+ *
+ * code that allows us to plan future dives
+ *
+ * (c) Dirk Hohndel 2013
+ */
+#include <assert.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <string.h>
+#include "dive.h"
+#include "deco.h"
+#include "divelist.h"
+#include "planner.h"
+#include "gettext.h"
+#include "libdivecomputer/parser.h"
+#include "qthelperfromc.h"
+#include "version.h"
+
+int diveplan_duration(struct diveplan *diveplan)
+{
+	struct divedatapoint *dp = diveplan->dp;
+	int duration = 0;
+	while(dp) {
+		if (dp->time > duration)
+			duration = dp->time;
+		dp = dp->next;
+	}
+	return duration / 60;
+}
+
+
+void add_plan_to_notes(struct diveplan *diveplan, struct dive *dive, bool show_disclaimer, int error)
+{
+	const unsigned int sz_buffer = 2000000;
+	const unsigned int sz_temp = 100000;
+	char *buffer = (char *)malloc(sz_buffer);
+	char *temp = (char *)malloc(sz_temp);
+	const char *deco, *segmentsymbol;
+	static char buf[1000];
+	int len, lastdepth = 0, lasttime = 0, lastsetpoint = -1, newdepth = 0, lastprintdepth = 0, lastprintsetpoint = -1;
+	struct gasmix lastprintgasmix = {{ -1 }, { -1 }};
+	struct divedatapoint *dp = diveplan->dp;
+	bool plan_verbatim = prefs.verbatim_plan;
+	bool plan_display_runtime = prefs.display_runtime;
+	bool plan_display_duration = prefs.display_duration;
+	bool plan_display_transitions = prefs.display_transitions;
+	bool gaschange_after = !plan_verbatim;
+	bool gaschange_before;
+	bool lastentered = true;
+	struct divedatapoint *nextdp = NULL;
+	struct divedatapoint *lastbottomdp = NULL;
+
+
+	if (decoMode() == VPMB) {
+		deco = translate("gettextFromC", "VPM-B");
+	} else {
+		deco = translate("gettextFromC", "BUHLMANN");
+	}
+
+	snprintf(buf, sizeof(buf), translate("gettextFromC", "DISCLAIMER / WARNING: THIS IS A NEW IMPLEMENTATION OF THE %s "
+				"ALGORITHM AND A DIVE PLANNER IMPLEMENTATION BASED ON THAT WHICH HAS "
+				"RECEIVED ONLY A LIMITED AMOUNT OF TESTING. WE STRONGLY RECOMMEND NOT TO "
+				"PLAN DIVES SIMPLY BASED ON THE RESULTS GIVEN HERE."), deco);
+	disclaimer = buf;
+
+	if (!dp) {
+		free((void *)buffer);
+		free((void *)temp);
+		return;
+	}
+
+	if (error) {
+		snprintf(temp, sz_temp, "%s",
+			 translate("gettextFromC", "Decompression calculation aborted due to excessive time"));
+		snprintf(buffer, sz_buffer, "<span style='color: red;'>%s </span> %s<br>",
+				translate("gettextFromC", "Warning:"), temp);
+		dive->notes = strdup(buffer);
+
+		free((void *)buffer);
+		free((void *)temp);
+		return;
+	}
+
+	len = show_disclaimer ? snprintf(buffer, sz_buffer, "<div><b>%s</b><br></div>", disclaimer) : 0;
+
+	if (diveplan->surface_interval > 60) {
+		len += snprintf(buffer + len, sz_buffer - len, "<div><b>%s (%s) %s %d:%02d) %s %s<br>",
+				translate("gettextFromC", "Subsurface"),
+				subsurface_canonical_version(),
+				translate("gettextFromC", "dive plan</b> (surface interval "),
+				FRACTION(diveplan->surface_interval / 60, 60),
+				translate("gettextFromC", "created on"),
+				get_current_date());
+	} else {
+		len += snprintf(buffer + len, sz_buffer - len, "<div><b>%s (%s) %s %s</b><br>",
+				translate("gettextFromC", "Subsurface"),
+				subsurface_canonical_version(),
+				translate("gettextFromC", "dive plan</b> created on"),
+				get_current_date());
+	}
+
+	len += snprintf(buffer + len, sz_buffer - len, translate("gettextFromC", "Runtime: %dmin<br></div>"),
+			diveplan_duration(diveplan));
+
+	if (!plan_verbatim) {
+		len += snprintf(buffer + len, sz_buffer - len, "<table><thead><tr><th></th><th>%s</th>",
+				translate("gettextFromC", "depth"));
+		if (plan_display_duration)
+			len += snprintf(buffer + len, sz_buffer - len, "<th style='padding-left: 10px;'>%s</th>",
+					translate("gettextFromC", "duration"));
+		if (plan_display_runtime)
+			len += snprintf(buffer + len, sz_buffer - len, "<th style='padding-left: 10px;'>%s</th>",
+					translate("gettextFromC", "runtime"));
+		len += snprintf(buffer + len, sz_buffer - len,
+				"<th style='padding-left: 10px; float: left;'>%s</th></tr></thead><tbody style='float: left;'>",
+				translate("gettextFromC", "gas"));
+	}
+	do {
+		struct gasmix gasmix, newgasmix = {};
+		const char *depth_unit;
+		double depthvalue;
+		int decimals;
+		bool isascent = (dp->depth.mm < lastdepth);
+
+		nextdp = dp->next;
+		if (dp->time == 0)
+			continue;
+		gasmix = dive->cylinder[dp->cylinderid].gasmix;
+		depthvalue = get_depth_units(dp->depth.mm, &decimals, &depth_unit);
+		/* analyze the dive points ahead */
+		while (nextdp && nextdp->time == 0)
+			nextdp = nextdp->next;
+		if (nextdp)
+			newgasmix = dive->cylinder[nextdp->cylinderid].gasmix;
+		gaschange_after = (nextdp && (gasmix_distance(&gasmix, &newgasmix) || dp->setpoint != nextdp->setpoint));
+		gaschange_before =  (gasmix_distance(&lastprintgasmix, &gasmix) || lastprintsetpoint != dp->setpoint);
+		/* do we want to skip this leg as it is devoid of anything useful? */
+		if (!dp->entered &&
+		    nextdp &&
+		    dp->depth.mm != lastdepth &&
+		    nextdp->depth.mm != dp->depth.mm &&
+		    !gaschange_before &&
+		    !gaschange_after)
+			continue;
+		if (dp->time - lasttime < 10 && !(gaschange_after && dp->next && dp->depth.mm != dp->next->depth.mm))
+			continue;
+
+		/* Store pointer to last entered datapoint for minimum gas calculation */
+		if (dp->entered && !nextdp->entered)
+			lastbottomdp = dp;
+
+		len = strlen(buffer);
+		if (plan_verbatim) {
+			/* When displaying a verbatim plan, we output a waypoint for every gas change.
+			 * Therefore, we do not need to test for difficult cases that mean we need to
+			 * print a segment just so we don't miss a gas change.  This makes the logic
+			 * to determine whether or not to print a segment much simpler than  with the
+			 * non-verbatim plan.
+			 */
+			if (dp->depth.mm != lastprintdepth) {
+				if (plan_display_transitions || dp->entered || !dp->next || (gaschange_after && dp->next && dp->depth.mm != nextdp->depth.mm)) {
+					if (dp->setpoint)
+						snprintf(temp, sz_temp, translate("gettextFromC", "Transition to %.*f %s in %d:%02d min - runtime %d:%02u on %s (SP = %.1fbar)"),
+							 decimals, depthvalue, depth_unit,
+							 FRACTION(dp->time - lasttime, 60),
+							 FRACTION(dp->time, 60),
+							 gasname(&gasmix),
+							 (double) dp->setpoint / 1000.0);
+
+					else
+						snprintf(temp, sz_temp, translate("gettextFromC", "Transition to %.*f %s in %d:%02d min - runtime %d:%02u on %s"),
+							 decimals, depthvalue, depth_unit,
+							 FRACTION(dp->time - lasttime, 60),
+							 FRACTION(dp->time, 60),
+							 gasname(&gasmix));
+
+					len += snprintf(buffer + len, sz_buffer - len, "%s<br>", temp);
+				}
+				newdepth = dp->depth.mm;
+				lasttime = dp->time;
+			} else {
+				if ((nextdp && dp->depth.mm != nextdp->depth.mm) || gaschange_after) {
+					if (dp->setpoint)
+						snprintf(temp, sz_temp, translate("gettextFromC", "Stay at %.*f %s for %d:%02d min - runtime %d:%02u on %s (SP = %.1fbar)"),
+								decimals, depthvalue, depth_unit,
+								FRACTION(dp->time - lasttime, 60),
+								FRACTION(dp->time, 60),
+								gasname(&gasmix),
+								(double) dp->setpoint / 1000.0);
+					else
+						snprintf(temp, sz_temp, translate("gettextFromC", "Stay at %.*f %s for %d:%02d min - runtime %d:%02u on %s"),
+								decimals, depthvalue, depth_unit,
+								FRACTION(dp->time - lasttime, 60),
+								FRACTION(dp->time, 60),
+								gasname(&gasmix));
+
+						len += snprintf(buffer + len, sz_buffer - len, "%s<br>", temp);
+					newdepth = dp->depth.mm;
+					lasttime = dp->time;
+				}
+			}
+		} else {
+			/* When not displaying the verbatim dive plan, we typically ignore ascents between deco stops,
+			 * unless the display transitions option has been selected.  We output a segment if any of the
+			 * following conditions are met.
+			 * 1) Display transitions is selected
+			 * 2) The segment was manually entered
+			 * 3) It is the last segment of the dive
+			 * 4) The segment is not an ascent, there was a gas change at the start of the segment and the next segment
+			 *    is a change in depth (typical deco stop)
+			 * 5) There is a gas change at the end of the segment and the last segment was entered (first calculated
+			 *    segment if it ends in a gas change)
+			 * 6) There is a gaschange after but no ascent.  This should only occur when backgas breaks option is selected
+			 * 7) It is an ascent ending with a gas change, but is not followed by a stop.   As case 5 already matches
+			 *    the first calculated ascent if it ends with a gas change, this should only occur if a travel gas is
+			 *    used for a calculated ascent, there is a subsequent gas change before the first deco stop, and zero
+			 *    time has been allowed for a gas switch.
+			 */
+			if (plan_display_transitions || dp->entered || !dp->next ||
+			    (nextdp && dp->depth.mm != nextdp->depth.mm) ||
+			    (!isascent && gaschange_before && nextdp && dp->depth.mm != nextdp->depth.mm) ||
+			    (gaschange_after && lastentered) || (gaschange_after && !isascent) ||
+			    (isascent && gaschange_after && nextdp && dp->depth.mm != nextdp->depth.mm )) {
+				// Print a symbol to indicate whether segment is an ascent, descent, constant depth (user entered) or deco stop
+				if (isascent)
+					segmentsymbol = "&#10138;"; // up-right arrow for ascent
+				else if (dp->depth.mm > lastdepth)
+					segmentsymbol = "&#10136;"; // down-right arrow for descent
+				else if (dp->entered)
+					segmentsymbol = "&#10137;"; // right arrow for entered entered segment at constant depth
+				else
+					segmentsymbol = "-";        // minus sign (a.k.a. horizontal line) for deco stop
+
+				len += snprintf(buffer + len, sz_buffer - len, "<tr><td style='padding-left: 10px; float: right;'>%s</td>", segmentsymbol);
+
+				snprintf(temp, sz_temp, translate("gettextFromC", "%3.0f%s"), depthvalue, depth_unit);
+				len += snprintf(buffer + len, sz_buffer - len, "<td style='padding-left: 10px; float: right;'>%s</td>", temp);
+				if (plan_display_duration) {
+					snprintf(temp, sz_temp, translate("gettextFromC", "%3dmin"), (dp->time - lasttime + 30) / 60);
+					len += snprintf(buffer + len, sz_buffer - len, "<td style='padding-left: 10px; float: right;'>%s</td>", temp);
+				}
+				if (plan_display_runtime) {
+					snprintf(temp, sz_temp, translate("gettextFromC", "%3dmin"), (dp->time + 30) / 60);
+					len += snprintf(buffer + len, sz_buffer - len, "<td style='padding-left: 10px; float: right;'>%s</td>", temp);
+				}
+
+				/* Normally a gas change is displayed on the stopping segment, so only display a gas change at the end of
+				 * an ascent segment if it is not followed by a stop
+				 */
+				if ((isascent || dp->entered) && gaschange_after && dp->next && nextdp && (dp->depth.mm != nextdp->depth.mm || nextdp->entered)) {
+					if (dp->setpoint) {
+						snprintf(temp, sz_temp, translate("gettextFromC", "(SP = %.1fbar)"), (double) nextdp->setpoint / 1000.0);
+						len += snprintf(buffer + len, sz_buffer - len, "<td style='padding-left: 10px; color: red; float: left;'><b>%s %s</b></td>", gasname(&newgasmix),
+									temp);
+					} else {
+							len += snprintf(buffer + len, sz_buffer - len, "<td style='padding-left: 10px; color: red; float: left;'><b>%s</b></td>", gasname(&newgasmix));
+					}
+					lastprintsetpoint = nextdp->setpoint;
+					lastprintgasmix = newgasmix;
+					gaschange_after = false;
+				} else if (gaschange_before) {
+				// If a new gas has been used for this segment, now is the time to show it
+					if (dp->setpoint) {
+						snprintf(temp, sz_temp, translate("gettextFromC", "(SP = %.1fbar)"), (double) dp->setpoint / 1000.0);
+						len += snprintf(buffer + len, sz_buffer - len, "<td style='padding-left: 10px; color: red; float: left;'><b>%s %s</b></td>", gasname(&gasmix),
+									temp);
+					} else {
+							len += snprintf(buffer + len, sz_buffer - len, "<td style='padding-left: 10px; color: red; float: left;'><b>%s</b></td>", gasname(&gasmix));
+					}
+					// Set variables so subsequent iterations can test against the last gas printed
+					lastprintsetpoint = dp->setpoint;
+					lastprintgasmix = gasmix;
+					gaschange_after = false;
+				} else {
+					len += snprintf(buffer + len, sz_buffer - len, "<td>&nbsp;</td>");
+				}
+				len += snprintf(buffer + len, sz_buffer - len, "</tr>");
+				newdepth = dp->depth.mm;
+				lasttime = dp->time;
+			}
+		}
+		if (gaschange_after) {
+			// gas switch at this waypoint
+			if (plan_verbatim) {
+				if (lastsetpoint >= 0) {
+					if (nextdp && nextdp->setpoint)
+						snprintf(temp, sz_temp, translate("gettextFromC", "Switch gas to %s (SP = %.1fbar)"), gasname(&newgasmix), (double) nextdp->setpoint / 1000.0);
+					else
+						snprintf(temp, sz_temp, translate("gettextFromC", "Switch gas to %s"), gasname(&newgasmix));
+
+					len += snprintf(buffer + len, sz_buffer - len, "%s<br>", temp);
+				}
+				gaschange_after = false;
+			gasmix = newgasmix;
+			}
+		}
+		lastprintdepth = newdepth;
+		lastdepth = dp->depth.mm;
+		lastsetpoint = dp->setpoint;
+		lastentered = dp->entered;
+	} while ((dp = nextdp) != NULL);
+	if (!plan_verbatim)
+		len += snprintf(buffer + len, sz_buffer - len, "</tbody></table><br>");
+
+	/* Print the CNS and OTU next.*/
+	dive->cns = 0;
+	dive->maxcns = 0;
+	update_cylinder_related_info(dive);
+	snprintf(temp, sz_temp, "%s", translate("gettextFromC", "CNS"));
+	len += snprintf(buffer + len, sz_buffer - len, "<div>%s: %i%%", temp, dive->cns);
+	snprintf(temp, sz_temp, "%s", translate("gettextFromC", "OTU"));
+	len += snprintf(buffer + len, sz_buffer - len, "<br>%s: %i<br></div>", temp, dive->otu);
+
+	/* Print the settings for the diveplan next. */
+	if (decoMode() == BUEHLMANN){
+		snprintf(temp, sz_temp, translate("gettextFromC", "Deco model: Bühlmann ZHL-16C with GFLow = %d%% and GFHigh = %d%%"),
+			diveplan->gflow, diveplan->gfhigh);
+	} else if (decoMode() == VPMB){
+		int temp_len;
+		if (diveplan->vpmb_conservatism == 0)
+			temp_len = snprintf(temp, sz_temp, "%s", translate("gettextFromC", "Deco model: VPM-B at nominal conservatism"));
+		else
+			temp_len = snprintf(temp, sz_temp, translate("gettextFromC", "Deco model: VPM-B at +%d conservatism"), diveplan->vpmb_conservatism);
+		if (diveplan->eff_gflow)
+			temp_len += snprintf(temp + temp_len, sz_temp - temp_len,  translate("gettextFromC", ", effective GF=%d/%d"), diveplan->eff_gflow
+					     , diveplan->eff_gfhigh);
+
+	} else if (decoMode() == RECREATIONAL){
+		snprintf(temp, sz_temp, translate("gettextFromC", "Deco model: Recreational mode based on Bühlmann ZHL-16B with GFLow = %d%% and GFHigh = %d%%"),
+			diveplan->gflow, diveplan->gfhigh);
+	}
+	len += snprintf(buffer + len, sz_buffer - len, "<div>%s<br>",temp);
+
+	const char *depth_unit;
+	int altitude = (int) get_depth_units((int) (log(1013.0 / diveplan->surface_pressure) * 7800000), NULL, &depth_unit);
+
+	len += snprintf(buffer + len, sz_buffer - len, translate("gettextFromC", "ATM pressure: %dmbar (%d%s)<br></div>"),
+			diveplan->surface_pressure,
+			altitude,
+			depth_unit);
+
+	/* Get SAC values and units for printing it in gas consumption */
+	double bottomsacvalue, decosacvalue;
+	int sacdecimals;
+	const char* sacunit;
+
+	bottomsacvalue = get_volume_units(prefs.bottomsac, &sacdecimals, &sacunit);
+	decosacvalue = get_volume_units(prefs.decosac, NULL, NULL);
+
+	/* Reduce number of decimals from 1 to 0 for bar/min, keep 2 for cuft/min */
+	if (sacdecimals==1) sacdecimals--;
+
+	/* Print the gas consumption next.*/
+	if (dive->dc.divemode == CCR)
+		snprintf(temp, sz_temp, "%s", translate("gettextFromC", "Gas consumption (CCR legs excluded):"));
+	else
+		snprintf(temp, sz_temp, "%s %.*f|%.*f%s/min):", translate("gettextFromC", "Gas consumption (based on SAC"),
+			sacdecimals, bottomsacvalue, sacdecimals, decosacvalue, sacunit);
+	len += snprintf(buffer + len, sz_buffer - len, "<div>%s<br>", temp);
+
+	/* Print gas consumption: This loop covers all cylinders */
+	for (int gasidx = 0; gasidx < MAX_CYLINDERS; gasidx++) {
+		double volume, pressure, deco_volume, deco_pressure, mingas_volume, mingas_pressure, mingas_depth;
+		const char *unit, *pressure_unit, *depth_unit;
+		char warning[1000] = "";
+		char mingas[1000] = "";
+		cylinder_t *cyl = &dive->cylinder[gasidx];
+		if (cylinder_none(cyl))
+			break;
+
+		volume = get_volume_units(cyl->gas_used.mliter, NULL, &unit);
+		deco_volume = get_volume_units(cyl->deco_gas_used.mliter, NULL, &unit);
+		if (cyl->type.size.mliter) {
+			int remaining_gas = lrint((double)cyl->end.mbar * cyl->type.size.mliter / 1000.0 / gas_compressibility_factor(&cyl->gasmix, cyl->end.mbar / 1000.0));
+			double deco_pressure_bar = isothermal_pressure(&cyl->gasmix, 1.0, remaining_gas + cyl->deco_gas_used.mliter, cyl->type.size.mliter)
+					- cyl->end.mbar / 1000.0;
+			deco_pressure = get_pressure_units(lrint(1000.0 * deco_pressure_bar), &pressure_unit);
+			pressure = get_pressure_units(cyl->start.mbar - cyl->end.mbar, &pressure_unit);
+			/* Warn if the plan uses more gas than is available in a cylinder
+			 * This only works if we have working pressure for the cylinder
+			 * 10bar is a made up number - but it seemed silly to pretend you could breathe cylinder down to 0 */
+			if (cyl->end.mbar < 10000)
+				snprintf(warning, sizeof(warning), "<br>&nbsp;&mdash; <span style='color: red;'>%s </span> %s",
+					translate("gettextFromC", "Warning:"),
+					translate("gettextFromC", "this is more gas than available in the specified cylinder!"));
+			else
+				if ((float) cyl->end.mbar * cyl->type.size.mliter / 1000.0 / gas_compressibility_factor(&cyl->gasmix, cyl->end.mbar / 1000.0)
+				    < (float) cyl->deco_gas_used.mliter)
+					snprintf(warning, sizeof(warning), "<br>&nbsp;&mdash; <span style='color: red;'>%s </span> %s",
+						translate("gettextFromC", "Warning:"),
+						translate("gettextFromC", "not enough reserve for gas sharing on ascent!"));
+
+			/* Do and print minimum gas calculation for last bottom gas, but only for OC mode, */
+			/* not for recreational mode and if no other warning was set before. */
+			else
+				if (lastbottomdp && gasidx == lastbottomdp->cylinderid
+					&& dive->dc.divemode == OC && decoMode() != RECREATIONAL) {
+					/* Calculate minimum gas volume. */
+					volume_t mingasv;
+					mingasv.mliter = lrint(prefs.sacfactor / 100.0 * prefs.problemsolvingtime * prefs.bottomsac
+						* depth_to_bar(lastbottomdp->depth.mm, dive)
+						+ prefs.sacfactor / 100.0 * cyl->deco_gas_used.mliter);
+					/* Calculate minimum gas pressure for cyclinder. */
+					lastbottomdp->minimum_gas.mbar = lrint(isothermal_pressure(&cyl->gasmix, 1.0,
+						mingasv.mliter, cyl->type.size.mliter) * 1000);
+					/* Translate all results into correct units */
+					mingas_volume = get_volume_units(mingasv.mliter, NULL, &unit);
+					mingas_pressure = get_pressure_units(lastbottomdp->minimum_gas.mbar, &pressure_unit);
+					mingas_depth = get_depth_units(lastbottomdp->depth.mm, NULL, &depth_unit);
+					/* Print it to results */
+					if (cyl->start.mbar > lastbottomdp->minimum_gas.mbar) snprintf(mingas, sizeof(mingas),
+						translate("gettextFromC", "<br>&nbsp;&mdash; <span style='color: green;'>Minimum gas</span> (based on %.1fxSAC/+%dmin@%.0f%s): %.0f%s/%.0f%s"),
+						prefs.sacfactor / 100.0, prefs.problemsolvingtime,
+						mingas_depth, depth_unit,
+						mingas_volume, unit,
+						mingas_pressure, pressure_unit);
+					else snprintf(warning, sizeof(warning), "<br>&nbsp;&mdash; <span style='color: red;'>%s </span> %s",
+						translate("gettextFromC", "Warning:"),
+						translate("gettextFromC", "required minimum gas for ascent already exceeding start pressure of cylinder!"));
+				}
+			/* Print the gas consumption for every cylinder here to temp buffer. */
+			snprintf(temp, sz_temp, translate("gettextFromC", "%.0f%s/%.0f%s of <span style='color: red;'><b>%s</b></span> (%.0f%s/%.0f%s in planned ascent)"), volume, unit, pressure, pressure_unit, gasname(&cyl->gasmix), deco_volume, unit, deco_pressure, pressure_unit);
+
+		} else {
+			snprintf(temp, sz_temp, translate("gettextFromC", "%.0f%s (%.0f%s during planned ascent) of <span style='color: red;'><b>%s</b></span>"),
+				volume, unit, deco_volume, unit, gasname(&cyl->gasmix));
+		}
+		/* Gas consumption: Now finally print all strings to output */
+		len += snprintf(buffer + len, sz_buffer - len, "%s%s%s<br>", temp, warning, mingas);
+	}
+
+	/* Print warnings for pO2 */
+	dp = diveplan->dp;
+	bool o2warning_exist = false;
+	if (dive->dc.divemode != CCR) {
+		while (dp) {
+			if (dp->time != 0) {
+				struct gas_pressures pressures;
+				struct gasmix *gasmix = &dive->cylinder[dp->cylinderid].gasmix;
+				fill_pressures(&pressures, depth_to_atm(dp->depth.mm, dive), gasmix, 0.0, dive->dc.divemode);
+
+				if (pressures.o2 > (dp->entered ? prefs.bottompo2 : prefs.decopo2) / 1000.0) {
+					const char *depth_unit;
+					int decimals;
+					double depth_value = get_depth_units(dp->depth.mm, &decimals, &depth_unit);
+					len = strlen(buffer);
+					if (!o2warning_exist) len += snprintf(buffer + len, sz_buffer - len, "<br>");
+					o2warning_exist = true;
+					snprintf(temp, sz_temp,
+						 translate("gettextFromC", "high pO₂ value %.2f at %d:%02u with gas %s at depth %.*f %s"),
+						 pressures.o2, FRACTION(dp->time, 60), gasname(gasmix), decimals, depth_value, depth_unit);
+					len += snprintf(buffer + len, sz_buffer - len, "<span style='color: red;'>%s </span> %s<br>",
+							translate("gettextFromC", "Warning:"), temp);
+				} else if (pressures.o2 < 0.16) {
+					const char *depth_unit;
+					int decimals;
+					double depth_value = get_depth_units(dp->depth.mm, &decimals, &depth_unit);
+					len = strlen(buffer);
+					if (!o2warning_exist) len += snprintf(buffer + len, sz_buffer - len, "<br>");
+					o2warning_exist = true;
+					snprintf(temp, sz_temp,
+						 translate("gettextFromC", "low pO₂ value %.2f at %d:%02u with gas %s at depth %.*f %s"),
+						 pressures.o2, FRACTION(dp->time, 60), gasname(gasmix), decimals, depth_value, depth_unit);
+					len += snprintf(buffer + len, sz_buffer - len, "<span style='color: red;'>%s </span> %s<br>",
+							translate("gettextFromC", "Warning:"), temp);
+
+				}
+			}
+			dp = dp->next;
+		}
+	}
+	snprintf(buffer + len, sz_buffer - len, "</div>");
+	dive->notes = strdup(buffer);
+
+	free((void *)buffer);
+	free((void *)temp);
+}