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Helper function for partial pressure calculation

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This patch introduces a new structure holding partial pressures (doubles in bar) for
all three gases and a helper function to compute them from gasmix (which holds fractions)
and ambient pressure. Currentlty this works for OC and CCR, to be extended later to PSCR.

Currently the dive_comp_type argument is unused.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Robert C. Helling 2014-09-15 14:55:20 +02:00 • committed by Dirk Hohndel
parent ae6b0468b1
commit d6abb739d9
8 changed files with 61 additions and 60 deletions
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5
dive.h
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@ -115,6 +115,11 @@ static inline int get_he(const struct gasmix *mix)
return mix->he.permille;
}
struct gas_pressures {
double o2, n2, he;
};
extern void fill_pressures(struct gas_pressures *pressures, const double amb_pressure, const struct gasmix *mix, double po2, const enum dive_comp_type type);
extern void sanitize_gasmix(struct gasmix *mix);
extern int gasmix_distance(const struct gasmix *a, const struct gasmix *b);
extern struct gasmix *get_gasmix_from_event(struct event *ev);