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subsurface/core/plannernotes.c
Willem Ferguson f072f78c29 Implement ICD calculations in planner output 
This patch implements the calculation and printing of icd parameters
in the dive planner output. It does:
1) icd parameters are calculated following the rule-of-fifths for
   OC trimix dives. For each gas change on the ascent that involves
   helium, the change in gas composition as well as the change in
   partial pressures are shown. If rule-of-fifths is exceeded, a
   warning message is prinetd.
2) An independent function is provided that in principle enables
   calculation of icd paramaters outside of the context of the
   dive planner.

Further updates to icd calculations

These changes respond to #1047. Code style conventions have been
improved. The ICD table is now also printed when the planner is
set to verbatim mode. The code that created the html icd results
has been moved to a function. This does not make the code more
efficient (many parameters passed) but it makes the code more clean.

Free a new dynamic variable (old_gas_name)

Stylistic changes to new code in plannernotes.c

Changes in comments to explain some of the changes I made.
Preparation of comments and functioning of isobaric_counterdiffusion()
and its dependent data structure for possible transfer to dive.c
and dive.h after finalisation and merging of the present PR.
Smaller stylistic changes to conform to our coding rules.

The several comments and suggestions during github review
(@atdotde, @leolit123, @sfuchs79) are incorporated.

Fixed up mis-aligned comments and text descriptions by replacing
tab characters with space characters, thereby hard-forcing
alignment of indented lines of text.

Remove parameter *dive from function isobaric_counterdiffusion().

Improve a few constructs to conform to our style rules.

Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
2018-01-19 19:43:16 +02:00

615 lines
30 KiB
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// 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 + 30) / 60;
}
struct icd_data { // This structure provides communication between function isobaric_counterdiffusion() and the calling software.
int dN2; // The change in fraction (permille) of nitrogen during the change
int dHe; // The change in fraction (permille) of helium during the change
};
/* Perform isobaric counterdiffusion calculations for gas changes in trimix dives.
* Here we use the rule-of-fifths where, during a change involving trimix gas, the increase in nitrogen
* should not exceed one fifth of the decrease in helium.
* Parameters: 1) Pointer to the dive structure.
* 2) pointers to two gas mixes, the gas being switched from and the gas being switched to.
* 3) a pointer to an icd_data structure.
* Output: i) The icd_data stucture is filled with the delta_N2 and delta_He numbers (as permille).
* ii) Function returns a boolean indicating an exceeding of the rule-of-fifths. False = no icd problem.
*/
bool isobaric_counterdiffusion(struct gasmix *oldgasmix, struct gasmix *newgasmix, struct icd_data *results)
{
results->dN2 = get_he(oldgasmix) + get_o2(oldgasmix) - get_he(newgasmix) - get_o2(newgasmix);
results->dHe = get_he(newgasmix) - get_he(oldgasmix);
return get_he(oldgasmix) && results->dN2 > 0 && 5 * results->dN2 > -results->dHe;
}
/* Add the icd results of one trimix gas change to the dive plan html buffer. Two rows are added to the table, one
* indicating fractions of gas, the other indication partial pressures of gas. This function makes use of the
* icd_data structure that was filled with information by the function isobaric_counterdiffusion().
* Parameters: 1) Pointer to the output buffer position at which writing should start.
* 2) The size of the part of the unused output buffer that remains unused.
* 3) The data structure containing icd calculation results: icdvalues.
* 4) The names of the gasses in the gas change: gas-from and gas-to.
* Returns: The size of the output buffer that has been used after the new results have been added.
*/
int add_icd_entry(char *icdbuffer, unsigned int maxsize, struct icd_data *icdvalues, int time_seconds, int ambientpressure_mbar, char *gasname_from, const char *gasname_to)
{
return snprintf(icdbuffer, maxsize,
"<tr><td rowspan='2' style= 'vertical-align:top;'>%3d%s</td><td rowspan=2 style= 'vertical-align:top;'>%s&#10137;%s</td><td style='padding-left: 10px;'>%+5.2f%%</td><td style= 'padding-left: 15px; color:%s;'>%+5.2f%%</td><td style='padding-left: 15px;'>%+5.2f%%</td></tr> <tr><td style='padding-left: 10px;'>%+5.2f%s</td><td style='padding-left: 15px; color:%s;'>%+5.2f%s</td><td style='padding-left: 15px;'>%+5.2f%s</td></tr>",
(time_seconds + 30) / 60, translate("gettextFromC", "min"), gasname_from, gasname_to, icdvalues->dHe / 10.0,
((5 * icdvalues->dN2) > -icdvalues->dHe) ? "red" : "#383838", icdvalues->dN2 / 10.0 , 0.2 * (-icdvalues->dHe / 10),
ambientpressure_mbar * icdvalues->dHe / 1e6, translate("gettextFromC", "bar"), ((5 * icdvalues->dN2) > -icdvalues->dHe) ? "red" : "#383838",
ambientpressure_mbar * icdvalues->dN2 / 1e6, translate("gettextFromC", "bar"),
ambientpressure_mbar * -icdvalues->dHe / 5e6, translate("gettextFromC", "bar"));
}
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;
const unsigned int sz_icdbuf = 10000;
char *buffer = (char *)malloc(sz_buffer);
char *temp = (char *)malloc(sz_temp);
char *icdbuffer = (char *)malloc(sz_icdbuf);
char *old_gas_name = (char *)malloc(20);
const char *deco, *segmentsymbol;
static char buf[1000];
int len, lastdepth = 0, lasttime = 0, lastsetpoint = -1, newdepth = 0, lastprintdepth = 0, lastprintsetpoint = -1;
int icyl, icdlen = 0;
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;
bool istrimix = false;
bool icdwarning = false;
struct divedatapoint *nextdp = NULL;
struct divedatapoint *lastbottomdp = NULL;
struct icd_data icdvalues;
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)
goto finished;
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);
goto finished;
}
len = show_disclaimer ? snprintf(buffer, sz_buffer, "<div><b>%s</b><br></div>", disclaimer) : 0;
if (diveplan->surface_interval < 0) {
len += snprintf(buffer + len, sz_buffer - len, "<div><b>%s (%s) %s<br>",
translate("gettextFromC", "Subsurface"),
subsurface_canonical_version(),
translate("gettextFromC", "dive plan</b> (overlapping dives detected)"));
dive->notes = strdup(buffer);
free((void *)buffer);
free((void *)temp);
return;
} else if (diveplan->surface_interval >= 48 * 60 *60) {
const char *current_date = get_current_date();
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"),
current_date);
free((void *)current_date);
} else {
const char *current_date = get_current_date();
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"),
current_date);
free((void *)current_date);
}
if (prefs.display_variations && decoMode() != RECREATIONAL)
len += snprintf(buffer + len, sz_buffer - len, translate("gettextFromC", "Runtime: %dmin%s"),
diveplan_duration(diveplan), "VARIATIONS<br></div>");
else
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"));
}
for (icyl = 0; icyl < MAX_CYLINDERS; icyl++) { // If dive plan has an OC cylinder with helium, then initialise ICD table:
if ((dive->cylinder[icyl].cylinder_use == OC_GAS) && (get_he(&dive->cylinder[icyl].gasmix) > 0)) {
istrimix = true;
icdlen = 0;
icdlen += snprintf(icdbuffer + icdlen, sz_icdbuf - icdlen,
"<table><tbody style='float: left;'><tr><td colspan=5>%s:</td></tr>",
translate("gettextFromC","Isobaric counterdiffusion information"));
icdlen += snprintf(icdbuffer + icdlen, sz_icdbuf - icdlen, "<tr><td align='left'><b>%s</b></td>",
translate("gettextFromC", "runtime"));
icdlen += snprintf(icdbuffer + icdlen, sz_icdbuf - icdlen, "<td align='center'><b>%s</b></td>",
translate("gettextFromC", "gaschange"));
icdlen += snprintf(icdbuffer + icdlen, sz_icdbuf - icdlen, "<td style='padding-left: 15px;'><b>%s</b></td>",
translate("gettextFromC", "&#916;He"));
icdlen += snprintf(icdbuffer + icdlen, sz_icdbuf - icdlen, "<td style='padding-left: 20px;'><b>%s</b></td>",
translate("gettextFromC", "&#916;N&#8322;"));
icdlen += snprintf(icdbuffer + icdlen, sz_icdbuf - icdlen, "<td style='padding-left: 10px;'><b>%s</b></td></tr>",
translate("gettextFromC", "max &#916;N&#8322;"));
break;
}
}
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 && lastdepth == dp->depth.mm) && !(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 ) ||
(lastentered && !dp->entered)) {
// 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));
if (isascent && (get_he(&lastprintgasmix) > 0)) { // For a trimix gas change on ascent, save ICD info if previous cylinder had helium
if (isobaric_counterdiffusion(&lastprintgasmix, &newgasmix, &icdvalues)) // Do icd calulations
icdwarning = true;
strcpy(old_gas_name, gasname(&lastprintgasmix)); // work-around because gasname() cannot be called more than once in one instruction.
icdlen += add_icd_entry(icdbuffer+icdlen, sz_icdbuf-icdlen, &icdvalues, dp->time, depth_to_mbar(dp->depth.mm, dive), old_gas_name, gasname(&newgasmix)); // Print calculations to buffer.
}
}
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));
if (get_he(&lastprintgasmix) > 0) { // For a trimix gas change, save ICD info if previous cylinder had helium
if (isobaric_counterdiffusion(&lastprintgasmix, &gasmix, &icdvalues)) // Do icd calculations
icdwarning = true;
strcpy(old_gas_name, gasname(&lastprintgasmix));
icdlen += add_icd_entry(icdbuffer+icdlen, sz_icdbuf-icdlen, &icdvalues, dp->time, depth_to_mbar(dp->depth.mm, dive), old_gas_name, gasname(&gasmix)); // and print them to buffer.
}
}
// 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 for verbatim
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));
if ((isascent) && (get_he(&lastprintgasmix) > 0)) { // For a trimix gas change on ascent:
if (isobaric_counterdiffusion(&lastprintgasmix, &newgasmix, &icdvalues)) // Do icd calculations
icdwarning = true;
strcpy(old_gas_name, gasname(&lastprintgasmix));
icdlen += add_icd_entry(icdbuffer+icdlen, sz_icdbuf-icdlen, &icdvalues, dp->time, depth_to_mbar(dp->depth.mm, dive), old_gas_name, gasname(&newgasmix)); // and print them to buffer.
}
}
len += snprintf(buffer + len, sz_buffer - len, "%s<br>", temp);
}
lastprintgasmix = newgasmix;
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_d_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_mbar = isothermal_pressure(&cyl->gasmix, 1.0, remaining_gas + cyl->deco_gas_used.mliter,
cyl->type.size.mliter) * 1000 - cyl->end.mbar;
deco_pressure = get_pressure_units(lrint(deco_pressure_mbar), &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 (cyl->end.mbar / 1000.0 * cyl->type.size.mliter / gas_compressibility_factor(&cyl->gasmix, cyl->end.mbar / 1000.0)
< 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_d_pressure = get_pressure_units(lrint((double)cyl->end.mbar + deco_pressure_mbar - 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), "<br>&nbsp;&mdash; <span style='color: %s;'>%s</span> (%s %.1fx%s/+%d%s@%.0f%s): \
%.0f%s/%.0f%s<span style='color: %s;'>/&Delta;:%+.0f%s</span>",
mingas_d_pressure > 0 ? "green" :"red",
translate("gettextFromC", "Minimum gas"),
translate("gettextFromC", "based on"),
prefs.sacfactor / 100.0,
translate("gettextFromC", "SAC"),
prefs.problemsolvingtime,
translate("gettextFromC", "min"),
mingas_depth, depth_unit,
mingas_volume, unit,
mingas_pressure, pressure_unit,
mingas_d_pressure > 0 ? "grey" :"indianred",
mingas_d_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. */
if (lrint(volume) > 0) {
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 of <span style='color: red;'><b>%s</b></span>"),
volume, unit, pressure, pressure_unit, gasname(&cyl->gasmix));
}
} else {
if (lrint(volume) > 0) {
snprintf(temp, sz_temp, translate("gettextFromC", "%.0f%s of <span style='color: red;'><b>%s</b></span> (%.0f%s during planned ascent)"),
volume, unit, gasname(&cyl->gasmix), deco_volume, unit);
} else {
snprintf(temp, sz_temp, translate("gettextFromC", "%.0f%s of <span style='color: red;'><b>%s</b></span>"),
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);
}
/* For trimix OC dives, add the ICD table here */
if (istrimix) {
icdlen += snprintf(icdbuffer + icdlen, sz_icdbuf - icdlen,"</tbody></table>"); // End the ICD table
len += snprintf(buffer + len, sz_buffer - len, "%s", icdbuffer); // ..and add it to the html buffer
if (icdwarning) { // If necessary, add a warning message to html buffer
len += snprintf(buffer + len, sz_buffer - len, "<span style='color: red;'>%s</span> %s",
translate("gettextFromC", "Warning:"),
translate("gettextFromC", "Isobaric counterdiffusion conditions exceeded"));
}
len += snprintf(buffer + len, sz_buffer - len, "<br>"); // ... and add a line break
}
/* 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);
finished:
free((void *)old_gas_name);
free((void *)buffer);
free((void *)temp);
free((void *)icdbuffer);
}
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