/* planner.c * * code that allows us to plan future dives * * (c) Dirk Hohndel 2013 */ #include #include #include #include #include "dive.h" #include "divelist.h" #include "planner.h" #include "gettext.h" #include "libdivecomputer/parser.h" #define TIMESTEP 2 /* second */ #define DECOTIMESTEP 60 /* seconds. Unit of deco stop times */ int decostoplevels_metric[] = { 0, 3000, 6000, 9000, 12000, 15000, 18000, 21000, 24000, 27000, 30000, 33000, 36000, 39000, 42000, 45000, 48000, 51000, 54000, 57000, 60000, 63000, 66000, 69000, 72000, 75000, 78000, 81000, 84000, 87000, 90000, 100000, 110000, 120000, 130000, 140000, 150000, 160000, 170000, 180000, 190000, 200000, 220000, 240000, 260000, 280000, 300000, 320000, 340000, 360000, 380000 }; int decostoplevels_imperial[] = { 0, 3048, 6096, 9144, 12192, 15240, 18288, 21336, 24384, 27432, 30480, 33528, 36576, 39624, 42672, 45720, 48768, 51816, 54864, 57912, 60960, 64008, 67056, 70104, 73152, 76200, 79248, 82296, 85344, 88392, 91440, 101600, 111760, 121920, 132080, 142240, 152400, 162560, 172720, 182880, 193040, 203200, 223520, 243840, 264160, 284480, 304800, 325120, 345440, 365760, 386080 }; double plangflow, plangfhigh; bool plan_verbatim, plan_display_runtime, plan_display_duration, plan_display_transitions; int first_stop_pressure; const char *disclaimer; #if DEBUG_PLAN void dump_plan(struct diveplan *diveplan) { struct divedatapoint *dp; struct tm tm; if (!diveplan) { printf("Diveplan NULL\n"); return; } utc_mkdate(diveplan->when, &tm); printf("\nDiveplan @ %04d-%02d-%02d %02d:%02d:%02d (surfpres %dmbar):\n", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, diveplan->surface_pressure); dp = diveplan->dp; while (dp) { printf("\t%3u:%02u: %dmm gas: %d o2 %d h2\n", FRACTION(dp->time, 60), dp->depth, get_o2(&dp->gasmix), get_he(&dp->gasmix)); dp = dp->next; } } #endif bool diveplan_empty(struct diveplan *diveplan) { struct divedatapoint *dp; if (!diveplan || !diveplan->dp) return true; dp = diveplan->dp; while (dp) { if (dp->time) return false; dp = dp->next; } return true; } /* get the gas at a certain time during the dive */ void get_gas_at_time(struct dive *dive, struct divecomputer *dc, duration_t time, struct gasmix *gas) { // we always start with the first gas, so that's our gas // unless an event tells us otherwise struct event *event = dc->events; *gas = dive->cylinder[0].gasmix; while (event && event->time.seconds <= time.seconds) { if (!strcmp(event->name, "gaschange")) { int cylinder_idx = get_cylinder_index(dive, event); *gas = dive->cylinder[cylinder_idx].gasmix; } event = event->next; } } int get_gasidx(struct dive *dive, struct gasmix *mix) { int gasidx = -1; while (++gasidx < MAX_CYLINDERS) if (gasmix_distance(&dive->cylinder[gasidx].gasmix, mix) < 100) return gasidx; return -1; } double interpolate_transition(struct dive *dive, duration_t t0, duration_t t1, depth_t d0, depth_t d1, const struct gasmix *gasmix, o2pressure_t po2) { int j; double tissue_tolerance = 0.0; for (j = t0.seconds; j < t1.seconds; j++) { int depth = interpolate(d0.mm, d1.mm, j - t0.seconds, t1.seconds - t0.seconds); tissue_tolerance = add_segment(depth_to_mbar(depth, dive) / 1000.0, gasmix, 1, po2.mbar, dive, prefs.bottomsac); } return tissue_tolerance; } /* returns the tissue tolerance at the end of this (partial) dive */ double tissue_at_end(struct dive *dive, char **cached_datap) { struct divecomputer *dc; struct sample *sample, *psample; int i; depth_t lastdepth = {}; duration_t t0 = {}, t1 = {}; double tissue_tolerance; struct gasmix gas; if (!dive) return 0.0; if (*cached_datap) { tissue_tolerance = restore_deco_state(*cached_datap); } else { tissue_tolerance = init_decompression(dive); cache_deco_state(tissue_tolerance, cached_datap); } dc = &dive->dc; if (!dc->samples) return tissue_tolerance; psample = sample = dc->sample; for (i = 0; i < dc->samples; i++, sample++) { t1 = sample->time; get_gas_at_time(dive, dc, t0, &gas); if (i > 0) lastdepth = psample->depth; tissue_tolerance = interpolate_transition(dive, t0, t1, lastdepth, sample->depth, &gas, sample->setpoint); psample = sample; t0 = t1; } return tissue_tolerance; } /* if a default cylinder is set, use that */ void fill_default_cylinder(cylinder_t *cyl) { const char *cyl_name = prefs.default_cylinder; struct tank_info_t *ti = tank_info; pressure_t pO2 = {.mbar = 1600}; if (!cyl_name) return; while (ti->name != NULL) { if (strcmp(ti->name, cyl_name) == 0) break; ti++; } if (ti->name == NULL) /* didn't find it */ return; cyl->type.description = strdup(ti->name); if (ti->ml) { cyl->type.size.mliter = ti->ml; cyl->type.workingpressure.mbar = ti->bar * 1000; } else { cyl->type.workingpressure.mbar = psi_to_mbar(ti->psi); if (ti->psi) cyl->type.size.mliter = cuft_to_l(ti->cuft) * 1000 / bar_to_atm(psi_to_bar(ti->psi)); } // MOD of air cyl->depth = gas_mod(&cyl->gasmix, pO2, &displayed_dive, 1); } /* make sure that the gas we are switching to is represented in our * list of cylinders */ static int verify_gas_exists(struct gasmix mix_in) { int i; cylinder_t *cyl; for (i = 0; i < MAX_CYLINDERS; i++) { cyl = displayed_dive.cylinder + i; if (cylinder_nodata(cyl)) continue; if (gasmix_distance(&cyl->gasmix, &mix_in) < 100) return i; } fprintf(stderr, "this gas %s should have been on the cylinder list\nThings will fail now\n", gasname(&mix_in)); return -1; } /* calculate the new end pressure of the cylinder, based on its current end pressure and the * latest segment. */ static void update_cylinder_pressure(struct dive *d, int old_depth, int new_depth, int duration, int sac, cylinder_t *cyl, bool in_deco) { volume_t gas_used; pressure_t delta_p; depth_t mean_depth; int factor = 1000; if (d->dc.divemode == PSCR) factor = prefs.pscr_ratio; if (!cyl) return; mean_depth.mm = (old_depth + new_depth) / 2; gas_used.mliter = depth_to_atm(mean_depth.mm, d) * sac / 60 * duration * factor / 1000; cyl->gas_used.mliter += gas_used.mliter; if (in_deco) cyl->deco_gas_used.mliter += gas_used.mliter; if (cyl->type.size.mliter) { delta_p.mbar = gas_used.mliter * 1000.0 / cyl->type.size.mliter; cyl->end.mbar -= delta_p.mbar; } } /* simply overwrite the data in the displayed_dive * return false if something goes wrong */ static void create_dive_from_plan(struct diveplan *diveplan, bool track_gas) { struct divedatapoint *dp; struct divecomputer *dc; struct sample *sample; struct gasmix oldgasmix; struct event *ev; cylinder_t *cyl; int oldpo2 = 0; int lasttime = 0; int lastdepth = 0; enum dive_comp_type type = displayed_dive.dc.divemode; if (!diveplan || !diveplan->dp) return; #if DEBUG_PLAN & 4 printf("in create_dive_from_plan\n"); dump_plan(diveplan); #endif displayed_dive.salinity = diveplan->salinity; // reset the cylinders and clear out the samples and events of the // displayed dive so we can restart reset_cylinders(&displayed_dive, track_gas); dc = &displayed_dive.dc; dc->when = displayed_dive.when = diveplan->when; free(dc->sample); dc->sample = NULL; dc->samples = 0; dc->alloc_samples = 0; while ((ev = dc->events)) { dc->events = dc->events->next; free(ev); } dp = diveplan->dp; cyl = &displayed_dive.cylinder[0]; oldgasmix = cyl->gasmix; sample = prepare_sample(dc); sample->setpoint.mbar = dp->setpoint; sample->sac.mliter = prefs.bottomsac; oldpo2 = dp->setpoint; if (track_gas && cyl->type.workingpressure.mbar) sample->cylinderpressure.mbar = cyl->end.mbar; sample->manually_entered = true; finish_sample(dc); while (dp) { struct gasmix gasmix = dp->gasmix; int po2 = dp->setpoint; if (dp->setpoint) type = CCR; int time = dp->time; int depth = dp->depth; if (time == 0) { /* special entries that just inform the algorithm about * additional gases that are available */ if (verify_gas_exists(gasmix) < 0) goto gas_error_exit; dp = dp->next; continue; } /* Check for SetPoint change */ if (oldpo2 != po2) { /* this is a bad idea - we should get a different SAMPLE_EVENT type * reserved for this in libdivecomputer... overloading SMAPLE_EVENT_PO2 * with a different meaning will only cause confusion elsewhere in the code */ add_event(dc, lasttime, SAMPLE_EVENT_PO2, 0, po2, "SP change"); oldpo2 = po2; } /* Make sure we have the new gas, and create a gas change event */ if (gasmix_distance(&gasmix, &oldgasmix) > 0) { int idx; if ((idx = verify_gas_exists(gasmix)) < 0) goto gas_error_exit; /* need to insert a first sample for the new gas */ add_gas_switch_event(&displayed_dive, dc, lasttime + 1, idx); cyl = &displayed_dive.cylinder[idx]; sample = prepare_sample(dc); sample[-1].setpoint.mbar = po2; sample->time.seconds = lasttime + 1; sample->depth.mm = lastdepth; sample->manually_entered = dp->entered; sample->sac.mliter = dp->entered ? prefs.bottomsac : prefs.decosac; if (track_gas && cyl->type.workingpressure.mbar) sample->cylinderpressure.mbar = cyl->sample_end.mbar; finish_sample(dc); oldgasmix = gasmix; } /* Create sample */ sample = prepare_sample(dc); /* set po2 at beginning of this segment */ /* and keep it valid for last sample - where it likely doesn't matter */ sample[-1].setpoint.mbar = po2; sample->setpoint.mbar = po2; sample->time.seconds = lasttime = time; sample->depth.mm = lastdepth = depth; sample->manually_entered = dp->entered; sample->sac.mliter = dp->entered ? prefs.bottomsac : prefs.decosac; if (track_gas && !sample[-1].setpoint.mbar) { /* Don't track gas usage for CCR legs of dive */ update_cylinder_pressure(&displayed_dive, sample[-1].depth.mm, depth, time - sample[-1].time.seconds, dp->entered ? diveplan->bottomsac : diveplan->decosac, cyl, !dp->entered); if (cyl->type.workingpressure.mbar) sample->cylinderpressure.mbar = cyl->end.mbar; } finish_sample(dc); dp = dp->next; } dc->divemode = type; #if DEBUG_PLAN & 32 save_dive(stdout, &displayed_dive); #endif return; gas_error_exit: report_error(translate("gettextFromC", "Too many gas mixes")); return; } void free_dps(struct diveplan *diveplan) { if (!diveplan) return; struct divedatapoint *dp = diveplan->dp; while (dp) { struct divedatapoint *ndp = dp->next; free(dp); dp = ndp; } diveplan->dp = NULL; } struct divedatapoint *create_dp(int time_incr, int depth, struct gasmix gasmix, int po2) { struct divedatapoint *dp; dp = malloc(sizeof(struct divedatapoint)); dp->time = time_incr; dp->depth = depth; dp->gasmix = gasmix; dp->setpoint = po2; dp->entered = false; dp->next = NULL; return dp; } void add_to_end_of_diveplan(struct diveplan *diveplan, struct divedatapoint *dp) { struct divedatapoint **lastdp = &diveplan->dp; struct divedatapoint *ldp = *lastdp; int lasttime = 0; while (*lastdp) { ldp = *lastdp; if (ldp->time > lasttime) lasttime = ldp->time; lastdp = &(*lastdp)->next; } *lastdp = dp; if (ldp && dp->time != 0) dp->time += lasttime; } struct divedatapoint *plan_add_segment(struct diveplan *diveplan, int duration, int depth, struct gasmix gasmix, int po2, bool entered) { struct divedatapoint *dp = create_dp(duration, depth, gasmix, po2); dp->entered = entered; add_to_end_of_diveplan(diveplan, dp); return (dp); } struct gaschanges { int depth; int gasidx; }; static struct gaschanges *analyze_gaslist(struct diveplan *diveplan, int *gaschangenr, int depth, int *asc_cylinder) { struct gasmix gas; int nr = 0; struct gaschanges *gaschanges = NULL; struct divedatapoint *dp = diveplan->dp; int best_depth = displayed_dive.cylinder[*asc_cylinder].depth.mm; while (dp) { if (dp->time == 0) { gas = dp->gasmix; if (dp->depth <= depth) { int i = 0; nr++; gaschanges = realloc(gaschanges, nr * sizeof(struct gaschanges)); while (i < nr - 1) { if (dp->depth < gaschanges[i].depth) { memmove(gaschanges + i + 1, gaschanges + i, (nr - i - 1) * sizeof(struct gaschanges)); break; } i++; } gaschanges[i].depth = dp->depth; gaschanges[i].gasidx = get_gasidx(&displayed_dive, &gas); assert(gaschanges[i].gasidx != -1); } else { /* is there a better mix to start deco? */ if (dp->depth < best_depth) { best_depth = dp->depth; *asc_cylinder = get_gasidx(&displayed_dive, &gas); } } } dp = dp->next; } *gaschangenr = nr; #if DEBUG_PLAN & 16 for (nr = 0; nr < *gaschangenr; nr++) { int idx = gaschanges[nr].gasidx; printf("gaschange nr %d: @ %5.2lfm gasidx %d (%s)\n", nr, gaschanges[nr].depth / 1000.0, idx, gasname(&displayed_dive.cylinder[idx].gasmix)); } #endif return gaschanges; } /* sort all the stops into one ordered list */ static unsigned int *sort_stops(int *dstops, int dnr, struct gaschanges *gstops, int gnr) { int i, gi, di; int total = dnr + gnr; unsigned int *stoplevels = malloc(total * sizeof(int)); /* no gaschanges */ if (gnr == 0) { memcpy(stoplevels, dstops, dnr * sizeof(int)); return stoplevels; } i = total - 1; gi = gnr - 1; di = dnr - 1; while (i >= 0) { if (dstops[di] > gstops[gi].depth) { stoplevels[i] = dstops[di]; di--; } else if (dstops[di] == gstops[gi].depth) { stoplevels[i] = dstops[di]; di--; gi--; } else { stoplevels[i] = gstops[gi].depth; gi--; } i--; if (di < 0) { while (gi >= 0) stoplevels[i--] = gstops[gi--].depth; break; } if (gi < 0) { while (di >= 0) stoplevels[i--] = dstops[di--]; break; } } while (i >= 0) stoplevels[i--] = 0; #if DEBUG_PLAN & 16 int k; for (k = gnr + dnr - 1; k >= 0; k--) { printf("stoplevel[%d]: %5.2lfm\n", k, stoplevels[k] / 1000.0); if (stoplevels[k] == 0) break; } #endif return stoplevels; } static 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); char buf[1000], *deco; 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 gaschange_after = !plan_verbatim; bool gaschange_before; bool lastentered; struct divedatapoint *nextdp = NULL; plan_verbatim = prefs.verbatim_plan; plan_display_runtime = prefs.display_runtime; plan_display_duration = prefs.display_duration; plan_display_transitions = prefs.display_transitions; if (prefs.deco_mode == VPMB) { deco = "VPM-B"; } else { deco = "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, "%s %s
", translate("gettextFromC", "Warning:"), temp); dive->notes = strdup(buffer); free((void *)buffer); free((void *)temp); return; } len = show_disclaimer ? snprintf(buffer, sz_buffer, "
%s

", disclaimer) : 0; if (prefs.deco_mode == BUEHLMANN){ snprintf(temp, sz_temp, translate("gettextFromC", "based on Buhlmann ZHL-16B with GFlow = %d and GFhigh = %d"), diveplan->gflow, diveplan->gfhigh); } else if (prefs.deco_mode == VPMB){ snprintf(temp, sz_temp, "%s", translate("gettextFromC", "based on VPM-B")); } else if (prefs.deco_mode == RECREATIONAL){ snprintf(temp, sz_temp, translate("gettextFromC", "recreational mode based on Buhlmann ZHL-16B with GFlow = %d and GFhigh = %d"), diveplan->gflow, diveplan->gfhigh); } len += snprintf(buffer + len, sz_buffer - len, "
%s
%s

", translate("gettextFromC", "Subsurface dive plan"), temp); if (!plan_verbatim) { len += snprintf(buffer + len, sz_buffer - len, "
", translate("gettextFromC", "depth")); if (plan_display_duration) len += snprintf(buffer + len, sz_buffer - len, "", translate("gettextFromC", "duration")); if (plan_display_runtime) len += snprintf(buffer + len, sz_buffer - len, "", translate("gettextFromC", "runtime")); len += snprintf(buffer + len, sz_buffer - len, "", translate("gettextFromC", "gas")); } do { struct gasmix gasmix, newgasmix = {}; const char *depth_unit; double depthvalue; int decimals; bool isascent = (dp->depth < lastdepth); nextdp = dp->next; if (dp->time == 0) continue; gasmix = dp->gasmix; depthvalue = get_depth_units(dp->depth, &decimals, &depth_unit); /* analyze the dive points ahead */ while (nextdp && nextdp->time == 0) nextdp = nextdp->next; if (nextdp) newgasmix = nextdp->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 != lastdepth && nextdp->depth != dp->depth && !gaschange_before && !gaschange_after) continue; if (dp->time - lasttime < 10 && !(gaschange_after && dp->next && dp->depth != dp->next->depth)) continue; 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 != lastprintdepth) { if (plan_display_transitions || dp->entered || !dp->next || (gaschange_after && dp->next && dp->depth != nextdp->depth)) { 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
", temp); } newdepth = dp->depth; lasttime = dp->time; } else { if ((nextdp && dp->depth != nextdp->depth) || 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
", temp); newdepth = dp->depth; 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 != nextdp->depth) || (!isascent && gaschange_before && nextdp && dp->depth != nextdp->depth) || (gaschange_after && lastentered) || (gaschange_after && !isascent) || (isascent && gaschange_after && nextdp && dp->depth != nextdp->depth )) { snprintf(temp, sz_temp, translate("gettextFromC", "%3.0f%s"), depthvalue, depth_unit); len += snprintf(buffer + len, sz_buffer - len, "", temp); if (plan_display_duration) { snprintf(temp, sz_temp, translate("gettextFromC", "%3dmin"), (dp->time - lasttime + 30) / 60); len += snprintf(buffer + len, sz_buffer - len, "", temp); } if (plan_display_runtime) { snprintf(temp, sz_temp, translate("gettextFromC", "%3dmin"), (dp->time + 30) / 60); len += snprintf(buffer + len, sz_buffer - len, "", 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 && gaschange_after && dp->next && nextdp && dp->depth != nextdp->depth) { if (dp->setpoint) { snprintf(temp, sz_temp, translate("gettextFromC", "(SP = %.1fbar)"), (double) nextdp->setpoint / 1000.0); len += snprintf(buffer + len, sz_buffer - len, "", gasname(&newgasmix), temp); } else { len += snprintf(buffer + len, sz_buffer - len, "", 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, "", gasname(&gasmix), temp); } else { len += snprintf(buffer + len, sz_buffer - len, "", 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, ""); } len += snprintf(buffer + len, sz_buffer - len, ""); newdepth = dp->depth; 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
", temp); } gaschange_after = false; gasmix = newgasmix; } } lastprintdepth = newdepth; lastdepth = dp->depth; lastsetpoint = dp->setpoint; lastentered = dp->entered; } while ((dp = nextdp) != NULL); len += snprintf(buffer + len, sz_buffer - len, "
%s%s%s%s
%s%s%s%s %s%s%s %s%s 
"); 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, "

%s: %i%%", temp, dive->cns); snprintf(temp, sz_temp, "%s", translate("gettextFromC", "OTU")); len += snprintf(buffer + len, sz_buffer - len, "
%s: %i
", temp, dive->otu); if (dive->dc.divemode == CCR) snprintf(temp, sz_temp, "%s", translate("gettextFromC", "Gas consumption (CCR legs excluded):")); else snprintf(temp, sz_temp, "%s", translate("gettextFromC", "Gas consumption:")); len += snprintf(buffer + len, sz_buffer - len, "

%s
", temp); for (int gasidx = 0; gasidx < MAX_CYLINDERS; gasidx++) { double volume, pressure, deco_volume, deco_pressure; const char *unit, *pressure_unit; char warning[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) { deco_pressure = get_pressure_units(1000.0 * cyl->deco_gas_used.mliter / cyl->type.size.mliter, &pressure_unit); pressure = get_pressure_units(1000.0 * cyl->gas_used.mliter / cyl->type.size.mliter, &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), " — %s %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 < (float) cyl->deco_gas_used.mliter) snprintf(warning, sizeof(warning), " — %s %s", translate("gettextFromC", "Warning:"), translate("gettextFromC", "not enough reserve for gas sharing on ascent!")); snprintf(temp, sz_temp, translate("gettextFromC", "%.0f%s/%.0f%s of %s (%.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 %s"), volume, unit, deco_volume, unit, gasname(&cyl->gasmix)); } len += snprintf(buffer + len, sz_buffer - len, "%s%s
", temp, warning); } dp = diveplan->dp; if (dive->dc.divemode != CCR) { while (dp) { if (dp->time != 0) { struct gas_pressures pressures; fill_pressures(&pressures, depth_to_atm(dp->depth, dive), &dp->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, &decimals, &depth_unit); len = strlen(buffer); 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(&dp->gasmix), decimals, depth_value, depth_unit); len += snprintf(buffer + len, sz_buffer - len, "%s %s
", translate("gettextFromC", "Warning:"), temp); } else if (pressures.o2 < 0.16) { const char *depth_unit; int decimals; double depth_value = get_depth_units(dp->depth, &decimals, &depth_unit); len = strlen(buffer); 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(&dp->gasmix), decimals, depth_value, depth_unit); len += snprintf(buffer + len, sz_buffer - len, "%s %s
", translate("gettextFromC", "Warning:"), temp); } } dp = dp->next; } } snprintf(buffer + len, sz_buffer - len, "
"); dive->notes = strdup(buffer); free((void *)buffer); free((void *)temp); } int ascent_velocity(int depth, int avg_depth, int bottom_time) { /* We need to make this configurable */ /* As an example (and possibly reasonable default) this is the Tech 1 provedure according * to http://www.globalunderwaterexplorers.org/files/Standards_and_Procedures/SOP_Manual_Ver2.0.2.pdf */ if (depth * 4 > avg_depth * 3) { return prefs.ascrate75; } else { if (depth * 2 > avg_depth) { return prefs.ascrate50; } else { if (depth > 6000) return prefs.ascratestops; else return prefs.ascratelast6m; } } } void track_ascent_gas(int depth, cylinder_t *cylinder, int avg_depth, int bottom_time, bool safety_stop) { while (depth > 0) { int deltad = ascent_velocity(depth, avg_depth, bottom_time) * TIMESTEP; if (deltad > depth) deltad = depth; update_cylinder_pressure(&displayed_dive, depth, depth - deltad, TIMESTEP, prefs.decosac, cylinder, true); if (depth <= 5000 && depth >= (5000 - deltad) && safety_stop) { update_cylinder_pressure(&displayed_dive, 5000, 5000, 180, prefs.decosac, cylinder, true); safety_stop = false; } depth -= deltad; } } // Determine whether ascending to the next stop will break the ceiling. Return true if the ascent is ok, false if it isn't. bool trial_ascent(int trial_depth, int stoplevel, int avg_depth, int bottom_time, double tissue_tolerance, struct gasmix *gasmix, int po2, double surface_pressure) { bool clear_to_ascend = true; char *trial_cache = NULL; // For VPM-B it is not relevant if we would violate a ceiling during ascent to the next stop but // if the next stop is below the ceiling at the start of the ascent (thus the offgasing during // the ascent is ignored. if (prefs.deco_mode == VPMB) return (deco_allowed_depth(tissue_tolerance, surface_pressure, &displayed_dive, 1) <= stoplevel); cache_deco_state(tissue_tolerance, &trial_cache); while (trial_depth > stoplevel) { int deltad = ascent_velocity(trial_depth, avg_depth, bottom_time) * TIMESTEP; if (deltad > trial_depth) /* don't test against depth above surface */ deltad = trial_depth; tissue_tolerance = add_segment(depth_to_mbar(trial_depth, &displayed_dive) / 1000.0, gasmix, TIMESTEP, po2, &displayed_dive, prefs.decosac); if (deco_allowed_depth(tissue_tolerance, surface_pressure, &displayed_dive, 1) > trial_depth - deltad) { /* We should have stopped */ clear_to_ascend = false; break; } trial_depth -= deltad; } restore_deco_state(trial_cache); free(trial_cache); return clear_to_ascend; } /* Determine if there is enough gas for the dive. Return true if there is enough. * Also return true if this cannot be calculated because the cylinder doesn't have * size or a starting pressure. */ bool enough_gas(int current_cylinder) { cylinder_t *cyl; cyl = &displayed_dive.cylinder[current_cylinder]; if (!cyl->start.mbar) return true; if (cyl->type.size.mliter) return (float) (cyl->end.mbar - prefs.reserve_gas) * cyl->type.size.mliter / 1000.0 > (float) cyl->deco_gas_used.mliter; else return true; } // Work out the stops. Return value is if there were any mandatory stops. bool plan(struct diveplan *diveplan, char **cached_datap, bool is_planner, bool show_disclaimer) { int bottom_depth; int bottom_gi; int bottom_stopidx; bool is_final_plan = true; int deco_time; int previous_deco_time; char *bottom_cache = NULL; struct sample *sample; int po2; int transitiontime, gi; int current_cylinder; unsigned int stopidx; int depth; double tissue_tolerance = 0.0; struct gaschanges *gaschanges = NULL; int gaschangenr; int *decostoplevels; int decostoplevelcount; unsigned int *stoplevels = NULL; bool stopping = false; bool pendinggaschange = false; bool clear_to_ascend; int clock, previous_point_time; int avg_depth, max_depth, bottom_time = 0; int last_ascend_rate; int best_first_ascend_cylinder; struct gasmix gas, bottom_gas; int o2time = 0; int breaktime = -1; int breakcylinder = 0; int error = 0; bool decodive = false; set_gf(diveplan->gflow, diveplan->gfhigh, prefs.gf_low_at_maxdepth); if (!diveplan->surface_pressure) diveplan->surface_pressure = SURFACE_PRESSURE; create_dive_from_plan(diveplan, is_planner); // Do we want deco stop array in metres or feet? if (prefs.units.length == METERS ) { decostoplevels = decostoplevels_metric; decostoplevelcount = sizeof(decostoplevels_metric) / sizeof(int); } else { decostoplevels = decostoplevels_imperial; decostoplevelcount = sizeof(decostoplevels_imperial) / sizeof(int); } /* If the user has selected last stop to be at 6m/20', we need to get rid of the 3m/10' stop. * Otherwise reinstate the last stop 3m/10' stop. */ if (prefs.last_stop) *(decostoplevels + 1) = 0; else *(decostoplevels + 1) = M_OR_FT(3,10); /* Let's start at the last 'sample', i.e. the last manually entered waypoint. */ sample = &displayed_dive.dc.sample[displayed_dive.dc.samples - 1]; get_gas_at_time(&displayed_dive, &displayed_dive.dc, sample->time, &gas); po2 = sample->setpoint.mbar; if ((current_cylinder = get_gasidx(&displayed_dive, &gas)) == -1) { report_error(translate("gettextFromC", "Can't find gas %s"), gasname(&gas)); current_cylinder = 0; } depth = displayed_dive.dc.sample[displayed_dive.dc.samples - 1].depth.mm; average_max_depth(diveplan, &avg_depth, &max_depth); last_ascend_rate = ascent_velocity(depth, avg_depth, bottom_time); /* if all we wanted was the dive just get us back to the surface */ if (!is_planner) { transitiontime = depth / 75; /* this still needs to be made configurable */ plan_add_segment(diveplan, transitiontime, 0, gas, po2, false); create_dive_from_plan(diveplan, is_planner); return(false); } tissue_tolerance = tissue_at_end(&displayed_dive, cached_datap); displayed_dive.surface_pressure.mbar = diveplan->surface_pressure; #if DEBUG_PLAN & 4 printf("gas %s\n", gasname(&gas)); printf("depth %5.2lfm \n", depth / 1000.0); #endif best_first_ascend_cylinder = current_cylinder; /* Find the gases available for deco */ if (po2) { // Don't change gas in CCR mode gaschanges = NULL; gaschangenr = 0; } else { gaschanges = analyze_gaslist(diveplan, &gaschangenr, depth, &best_first_ascend_cylinder); } /* Find the first potential decostopdepth above current depth */ for (stopidx = 0; stopidx < decostoplevelcount; stopidx++) if (*(decostoplevels + stopidx) >= depth) break; if (stopidx > 0) stopidx--; /* Stoplevels are either depths of gas changes or potential deco stop depths. */ stoplevels = sort_stops(decostoplevels, stopidx + 1, gaschanges, gaschangenr); stopidx += gaschangenr; /* Keep time during the ascend */ bottom_time = clock = previous_point_time = displayed_dive.dc.sample[displayed_dive.dc.samples - 1].time.seconds; gi = gaschangenr - 1; if(prefs.deco_mode == RECREATIONAL) { bool safety_stop = prefs.safetystop && max_depth >= 10000; track_ascent_gas(depth, &displayed_dive.cylinder[current_cylinder], avg_depth, bottom_time, safety_stop); // How long can we stay at the current depth and still directly ascent to the surface? while (trial_ascent(depth, 0, avg_depth, bottom_time, tissue_tolerance, &displayed_dive.cylinder[current_cylinder].gasmix, po2, diveplan->surface_pressure / 1000.0) && enough_gas(current_cylinder)) { tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0, &displayed_dive.cylinder[current_cylinder].gasmix, DECOTIMESTEP, po2, &displayed_dive, prefs.bottomsac); update_cylinder_pressure(&displayed_dive, depth, depth, DECOTIMESTEP, prefs.bottomsac, &displayed_dive.cylinder[current_cylinder], false); clock += DECOTIMESTEP; } clock -= DECOTIMESTEP; plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, true); previous_point_time = clock; do { /* Ascend to surface */ int deltad = ascent_velocity(depth, avg_depth, bottom_time) * TIMESTEP; if (ascent_velocity(depth, avg_depth, bottom_time) != last_ascend_rate) { plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false); previous_point_time = clock; last_ascend_rate = ascent_velocity(depth, avg_depth, bottom_time); } if (depth - deltad < 0) deltad = depth; tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0, &displayed_dive.cylinder[current_cylinder].gasmix, TIMESTEP, po2, &displayed_dive, prefs.decosac); clock += TIMESTEP; depth -= deltad; if (depth <= 5000 && depth >= (5000 - deltad) && safety_stop) { plan_add_segment(diveplan, clock - previous_point_time, 5000, gas, po2, false); previous_point_time = clock; clock += 180; plan_add_segment(diveplan, clock - previous_point_time, 5000, gas, po2, false); previous_point_time = clock; safety_stop = false; } } while (depth > 0); plan_add_segment(diveplan, clock - previous_point_time, 0, gas, po2, false); create_dive_from_plan(diveplan, is_planner); add_plan_to_notes(diveplan, &displayed_dive, show_disclaimer, error); fixup_dc_duration(&displayed_dive.dc); free(stoplevels); free(gaschanges); return(false); } if (best_first_ascend_cylinder != current_cylinder) { stopping = true; current_cylinder = best_first_ascend_cylinder; gas = displayed_dive.cylinder[current_cylinder].gasmix; #if DEBUG_PLAN & 16 printf("switch to gas %d (%d/%d) @ %5.2lfm\n", best_first_ascend_cylinder, (get_o2(&gas) + 5) / 10, (get_he(&gas) + 5) / 10, gaschanges[best_first_ascend_cylinder].depth / 1000.0); #endif } // VPM-B or Buehlmann Deco nuclear_regeneration(clock); vpmb_start_gradient(); previous_deco_time = 100000000; deco_time = 10000000; cache_deco_state(tissue_tolerance, &bottom_cache); // Lets us make several iterations bottom_depth = depth; bottom_gi = gi; bottom_gas = gas; bottom_stopidx = stopidx; //CVA do { is_final_plan = (prefs.deco_mode == BUEHLMANN) || (previous_deco_time - deco_time < 10); // CVA time converges if (deco_time != 10000000) vpmb_next_gradient(deco_time, diveplan->surface_pressure / 1000.0); previous_deco_time = deco_time; restore_deco_state(bottom_cache); depth = bottom_depth; gi = bottom_gi; clock = previous_point_time = bottom_time; gas = bottom_gas; stopping = false; decodive = false; stopidx = bottom_stopidx; breaktime = -1; breakcylinder = 0; o2time = 0; first_stop_pressure = 0; last_ascend_rate = ascent_velocity(depth, avg_depth, bottom_time); if ((current_cylinder = get_gasidx(&displayed_dive, &gas)) == -1) { report_error(translate("gettextFromC", "Can't find gas %s"), gasname(&gas)); current_cylinder = 0; } while (1) { /* We will break out when we hit the surface */ do { /* Ascend to next stop depth */ int deltad = ascent_velocity(depth, avg_depth, bottom_time) * TIMESTEP; if (ascent_velocity(depth, avg_depth, bottom_time) != last_ascend_rate) { if (is_final_plan) plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false); previous_point_time = clock; stopping = false; last_ascend_rate = ascent_velocity(depth, avg_depth, bottom_time); } if (depth - deltad < stoplevels[stopidx]) deltad = depth - stoplevels[stopidx]; tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0, &displayed_dive.cylinder[current_cylinder].gasmix, TIMESTEP, po2, &displayed_dive, prefs.decosac); clock += TIMESTEP; depth -= deltad; } while (depth > 0 && depth > stoplevels[stopidx]); if (depth <= 0) break; /* We are at the surface */ if (gi >= 0 && stoplevels[stopidx] <= gaschanges[gi].depth) { /* We have reached a gas change. * Record this in the dive plan */ if (is_final_plan) plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false); previous_point_time = clock; stopping = true; // Boyles Law compensation if (first_stop_pressure == 0) first_stop_pressure = depth_to_mbar(depth, &displayed_dive); boyles_law(depth_to_mbar(stoplevels[stopidx], &displayed_dive) / 1000.0); /* Check we need to change cylinder. * We might not if the cylinder was chosen by the user * or user has selected only to switch only at required stops. * If current gas is hypoxic, we want to switch asap */ if (current_cylinder != gaschanges[gi].gasidx) { if (!prefs.switch_at_req_stop || !trial_ascent(depth, stoplevels[stopidx - 1], avg_depth, bottom_time, tissue_tolerance, &displayed_dive.cylinder[current_cylinder].gasmix, po2, diveplan->surface_pressure / 1000.0) || get_o2(&displayed_dive.cylinder[current_cylinder].gasmix) < 160) { current_cylinder = gaschanges[gi].gasidx; gas = displayed_dive.cylinder[current_cylinder].gasmix; #if DEBUG_PLAN & 16 printf("switch to gas %d (%d/%d) @ %5.2lfm\n", gaschanges[gi].gasidx, (get_o2(&gas) + 5) / 10, (get_he(&gas) + 5) / 10, gaschanges[gi].depth / 1000.0); #endif /* Stop for the minimum duration to switch gas */ tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0, &displayed_dive.cylinder[current_cylinder].gasmix, prefs.min_switch_duration, po2, &displayed_dive, prefs.decosac); clock += prefs.min_switch_duration; if (prefs.doo2breaks && get_o2(&displayed_dive.cylinder[current_cylinder].gasmix) == 1000) o2time += prefs.min_switch_duration; } else { /* The user has selected the option to switch gas only at required stops. * Remember that we are waiting to switch gas */ pendinggaschange = true; } } gi--; } --stopidx; /* Save the current state and try to ascend to the next stopdepth */ while (1) { /* Check if ascending to next stop is clear, go back and wait if we hit the ceiling on the way */ if (trial_ascent(depth, stoplevels[stopidx], avg_depth, bottom_time, tissue_tolerance, &displayed_dive.cylinder[current_cylinder].gasmix, po2, diveplan->surface_pressure / 1000.0)) break; /* We did not hit the ceiling */ /* Add a minute of deco time and then try again */ decodive = true; if (!stopping) { /* The last segment was an ascend segment. * Add a waypoint for start of this deco stop */ if (is_final_plan) plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false); previous_point_time = clock; stopping = true; // Boyles Law compensation if (first_stop_pressure == 0) first_stop_pressure = depth_to_mbar(depth, &displayed_dive); boyles_law(depth_to_mbar(stoplevels[stopidx], &displayed_dive) / 1000.0); } /* Are we waiting to switch gas? * Occurs when the user has selected the option to switch only at required stops */ if (pendinggaschange) { current_cylinder = gaschanges[gi + 1].gasidx; gas = displayed_dive.cylinder[current_cylinder].gasmix; #if DEBUG_PLAN & 16 printf("switch to gas %d (%d/%d) @ %5.2lfm\n", gaschanges[gi + 1].gasidx, (get_o2(&gas) + 5) / 10, (get_he(&gas) + 5) / 10, gaschanges[gi + 1].depth / 1000.0); #endif /* Stop for the minimum duration to switch gas */ tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0, &displayed_dive.cylinder[current_cylinder].gasmix, prefs.min_switch_duration, po2, &displayed_dive, prefs.decosac); clock += prefs.min_switch_duration; if (prefs.doo2breaks && get_o2(&displayed_dive.cylinder[current_cylinder].gasmix) == 1000) o2time += prefs.min_switch_duration; pendinggaschange = false; } /* Deco stop should end when runtime is at a whole minute */ int this_decotimestep; this_decotimestep = DECOTIMESTEP - clock % DECOTIMESTEP; tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0, &displayed_dive.cylinder[current_cylinder].gasmix, this_decotimestep, po2, &displayed_dive, prefs.decosac); clock += this_decotimestep; /* Finish infinite deco */ if(clock >= 48 * 3600 && depth >= 6000) { error = LONGDECO; break; } if (prefs.doo2breaks) { /* The backgas breaks option limits time on oxygen to 12 minutes, followed by 6 minutes on * backgas (first defined gas). This could be customized if there were demand. */ if (get_o2(&displayed_dive.cylinder[current_cylinder].gasmix) == 1000) { o2time += DECOTIMESTEP; if (o2time >= 12 * 60) { breaktime = 0; breakcylinder = current_cylinder; if (is_final_plan) plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false); previous_point_time = clock; current_cylinder = 0; gas = displayed_dive.cylinder[current_cylinder].gasmix; } } else { if (breaktime >= 0) { breaktime += DECOTIMESTEP; if (breaktime >= 6 * 60) { o2time = 0; if (is_final_plan) plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false); previous_point_time = clock; current_cylinder = breakcylinder; gas = displayed_dive.cylinder[current_cylinder].gasmix; breaktime = -1; } } } } } if (stopping) { /* Next we will ascend again. Add a waypoint if we have spend deco time */ if (is_final_plan) plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false); previous_point_time = clock; stopping = false; } } deco_time = clock - bottom_time; } while (!is_final_plan); plan_add_segment(diveplan, clock - previous_point_time, 0, gas, po2, false); create_dive_from_plan(diveplan, is_planner); add_plan_to_notes(diveplan, &displayed_dive, show_disclaimer, error); fixup_dc_duration(&displayed_dive.dc); free(stoplevels); free(gaschanges); return decodive; } /* * Get a value in tenths (so "10.2" == 102, "9" = 90) * * Return negative for errors. */ static int get_tenths(const char *begin, const char **endp) { char *end; int value = strtol(begin, &end, 10); if (begin == end) return -1; value *= 10; /* Fraction? We only look at the first digit */ if (*end == '.') { end++; if (!isdigit(*end)) return -1; value += *end - '0'; do { end++; } while (isdigit(*end)); } *endp = end; return value; } static int get_permille(const char *begin, const char **end) { int value = get_tenths(begin, end); if (value >= 0) { /* Allow a percentage sign */ if (**end == '%') ++*end; } return value; } int validate_gas(const char *text, struct gasmix *gas) { int o2, he; if (!text) return 0; while (isspace(*text)) text++; if (!*text) return 0; if (!strcasecmp(text, translate("gettextFromC", "air"))) { o2 = O2_IN_AIR; he = 0; text += strlen(translate("gettextFromC", "air")); } else if (!strcasecmp(text, translate("gettextFromC", "oxygen"))) { o2 = 1000; he = 0; text += strlen(translate("gettextFromC", "oxygen")); } else if (!strncasecmp(text, translate("gettextFromC", "ean"), 3)) { o2 = get_permille(text + 3, &text); he = 0; } else { o2 = get_permille(text, &text); he = 0; if (*text == '/') he = get_permille(text + 1, &text); } /* We don't want any extra crud */ while (isspace(*text)) text++; if (*text) return 0; /* Validate the gas mix */ if (*text || o2 < 1 || o2 > 1000 || he < 0 || o2 + he > 1000) return 0; /* Let it rip */ gas->o2.permille = o2; gas->he.permille = he; return 1; } int validate_po2(const char *text, int *mbar_po2) { int po2; if (!text) return 0; po2 = get_tenths(text, &text); if (po2 < 0) return 0; while (isspace(*text)) text++; while (isspace(*text)) text++; if (*text) return 0; *mbar_po2 = po2 * 100; return 1; }