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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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6
core/statistics.c
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@ -309,14 +309,14 @@ static void get_gas_parts(struct gasmix mix, volume_t vol, int o2_in_topup, volu
{
volume_t air = {};
if (gasmix_is_air(&mix)) {
if (gasmix_is_air(mix)) {
o2->mliter = 0;
he->mliter = 0;
return;
}
air.mliter = lrint(((double)vol.mliter * (1000 - get_he(&mix) - get_o2(&mix))) / (1000 - o2_in_topup));
he->mliter = lrint(((double)vol.mliter * get_he(&mix)) / 1000.0);
air.mliter = lrint(((double)vol.mliter * (1000 - get_he(mix) - get_o2(mix))) / (1000 - o2_in_topup));
he->mliter = lrint(((double)vol.mliter * get_he(mix)) / 1000.0);
o2->mliter += vol.mliter - he->mliter - air.mliter;
}