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Core: dynamically allocate the result of get_gas_used()

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get_gas_used() returns the volume of used gases. Currently,
an array with MAX_CYLINDERS is passed in. If we want to make the
number of cylinders dynamic, the function must use an arbitrarilly
sized array.

Therefore, return a dynamically allocated array and free it
in the caller.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2019-06-27 07:42:09 +02:00 • committed by Dirk Hohndel
parent f179ec033f
commit 11467fa326
5 changed files with 16 additions and 10 deletions
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11
core/statistics.c
View file

@ -359,10 +359,13 @@ bool is_cylinder_prot(const struct dive *dive, int idx)
return false;
}
void get_gas_used(struct dive *dive, volume_t gases[MAX_CYLINDERS])
/* Returns a dynamically allocated array with MAX_CYLINDERS entries that
* has to be freed by the caller */
volume_t *get_gas_used(struct dive *dive)
{
int idx;
volume_t *gases = malloc(MAX_CYLINDERS * sizeof(volume_t));
for (idx = 0; idx < MAX_CYLINDERS; idx++) {
cylinder_t *cyl = &dive->cylinder[idx];
pressure_t start, end;
@ -372,6 +375,8 @@ void get_gas_used(struct dive *dive, volume_t gases[MAX_CYLINDERS])
if (end.mbar && start.mbar > end.mbar)
gases[idx].mliter = gas_volume(cyl, start) - gas_volume(cyl, end);
}
return gases;
}
/* Quite crude reverse-blender-function, but it produces a approx result */
@ -397,8 +402,7 @@ void selected_dives_gas_parts(volume_t *o2_tot, volume_t *he_tot)
for_each_dive (i, d) {
if (!d->selected)
continue;
volume_t diveGases[MAX_CYLINDERS] = {};
get_gas_used(d, diveGases);
volume_t *diveGases = get_gas_used(d);
for (j = 0; j < MAX_CYLINDERS; j++) {
if (diveGases[j].mliter) {
volume_t o2 = {}, he = {};
@ -407,5 +411,6 @@ void selected_dives_gas_parts(volume_t *o2_tot, volume_t *he_tot)
he_tot->mliter += he.mliter;
}
}
free(diveGases);
}
}