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Core: extend last gas mix instead of defaulting to air.

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Instead of defaulting to air when we run out of gas mixes to assign to
cylinders, use the last gas mix provided by the dive computer.

If no gas mixes are provided at all, then default to air.

This prevents Subsurface from "inventing" gas mixes which are not
reported by the dive computer. It also works very nicely with a sidemount
configuration where the dive computer typically reports two cylinders but
only a single gas mix.

Signed-off-by: Micha WERLE <micha@michaelwerle.com>
This commit is contained in:
Micha WERLE 2023-11-14 13:12:08 +09:00 committed by Michael Keller
parent 5c2e4c395b
commit c7171179b3
1 changed files with 8 additions and 5 deletions
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13
core/libdivecomputer.c
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@ -113,14 +113,16 @@ static int parse_gasmixes(device_data_t *devdata, struct dive *dive, dc_parser_t
report_error("Warning: different number of gases (%d) and cylinders (%d)", ngases, ntanks);
} else if (ntanks > ngases) {
shown_warning = true;
report_error("Warning: smaller number of gases (%d) than cylinders (%d). Assuming air.", ngases, ntanks);
report_error("Warning: smaller number of gases (%d) than cylinders (%d).", ngases, ntanks);
}
}
bool no_volume = true;
cylinder_t cyl = empty_cylinder;
struct gasmix last_mix = gasmix_air; /* default to air */
clear_cylinder_table(&dive->cylinders);
for (i = 0; i < ngases || i < ntanks; i++) {
cylinder_t cyl = empty_cylinder;
for (i = 0; i < MAX(ngases, ntanks); i++) {
cyl = empty_cylinder;
if (i < ngases) {
dc_gasmix_t gasmix = { 0 };
int o2, he;
@ -147,9 +149,10 @@ static int parse_gasmixes(device_data_t *devdata, struct dive *dive, dc_parser_t
}
he = 0;
}
cyl.gasmix.o2.permille = o2;
cyl.gasmix.he.permille = he;
last_mix.o2.permille = o2;
last_mix.he.permille = he;
}
cyl.gasmix = last_mix;
if (rc == DC_STATUS_UNSUPPORTED)
// Gasmix is inactive