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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
core/save-xml.c
View file

@ -127,10 +127,10 @@ static void save_overview(struct membuffer *b, struct dive *dive)
show_utf8(b, dive->suit, " <suit>", "</suit>\n", 0);
}
static void put_gasmix(struct membuffer *b, struct gasmix *mix)
static void put_gasmix(struct membuffer *b, struct gasmix mix)
{
int o2 = mix->o2.permille;
int he = mix->he.permille;
int o2 = mix.o2.permille;
int he = mix.he.permille;
if (o2) {
put_format(b, " o2='%u.%u%%'", FRACTION(o2, 10));
@ -155,7 +155,7 @@ static void save_cylinder_info(struct membuffer *b, struct dive *dive)
put_milli(b, " size='", volume, " l'");
put_pressure(b, cylinder->type.workingpressure, " workpressure='", " bar'");
show_utf8(b, description, " description='", "'", 1);
put_gasmix(b, &cylinder->gasmix);
put_gasmix(b, cylinder->gasmix);
put_pressure(b, cylinder->start, " start='", " bar'");
put_pressure(b, cylinder->end, " end='", " bar'");
if (cylinder->cylinder_use != OC_GAS)
@ -310,7 +310,7 @@ static void save_one_event(struct membuffer *b, struct dive *dive, struct event
struct gasmix mix = get_gasmix_from_event(dive, ev);
if (ev->gas.index >= 0)
show_integer(b, ev->gas.index, "cylinder='", "'");
put_gasmix(b, &mix);
put_gasmix(b, mix);
}
put_format(b, " />\n");
}