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Cleanup: pass gasmix by value

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In a previous commit, the get_gasmix_* functions were changed to
return by value. For consistency, also pass gasmix by value.

Note that on common 64-bit platforms struct gasmix is the size
of a pointer [2 * 32 bit vs. 64 bit] and therefore uses the
same space on the stack. On 32-bit platforms, the stack use
is probably doubled, but in return a dereference is avoided.

Supporting arbitrary gas-mixes (H2, Ar, ...) will be such an
invasive change that going back to pointers is probably the
least of our worries.

This commit is a step in const-ifying input parameters (passing
by value is the ultimate way of signaling that the input parameter
will not be changed [unless there are references to said parameter]).

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2018-08-16 19:10:10 +02:00 • committed by Dirk Hohndel
parent 5c4569247a
commit 360f07e453
28 changed files with 214 additions and 215 deletions
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10
profile-widget/tankitem.cpp
View file

@ -57,15 +57,15 @@ void TankItem::setData(DivePlotDataModel *model, struct plot_info *plotInfo, str
modelDataChanged();
}
void TankItem::createBar(qreal x, qreal w, struct gasmix *gas)
void TankItem::createBar(qreal x, qreal w, struct gasmix gas)
{
// pick the right gradient, size, position and text
QGraphicsRectItem *rect = new QGraphicsRectItem(x, 0, w, height, this);
if (gasmix_is_air(gas))
rect->setBrush(air);
else if (gas->he.permille)
else if (gas.he.permille)
rect->setBrush(trimix);
else if (gas->o2.permille == 1000)
else if (gas.o2.permille == 1000)
rect->setBrush(oxygen);
else
rect->setBrush(nitrox);
@ -112,14 +112,14 @@ void TankItem::modelDataChanged(const QModelIndex&, const QModelIndex&)
while (ev && (int)ev->time.seconds < last_entry->sec) {
width = hAxis->posAtValue(ev->time.seconds) - hAxis->posAtValue(startTime);
left = hAxis->posAtValue(startTime);
createBar(left, width, &gasmix);
createBar(left, width, gasmix);
startTime = ev->time.seconds;
gasmix = get_gasmix_from_event(&displayed_dive, ev);
ev = get_next_event(ev->next, "gaschange");
}
width = hAxis->posAtValue(last_entry->sec) - hAxis->posAtValue(startTime);
left = hAxis->posAtValue(startTime);
createBar(left, width, &gasmix);
createBar(left, width, gasmix);
}
void TankItem::setHorizontalAxis(DiveCartesianAxis *horizontal)