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Use "rint()" instead of rounding manually with "+ 0.5"

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rint() is "round to nearest integer", and does a better job than +0.5
(followed by the implicit truncation inherent in integer casting).  We
already used 'rint()' for values that could be negative (where +0.5 is
actively wrong), let's just make it consistent.

Of course, as is usual for the messy C math functions, it depends on the
current rounding mode.  But the default round-to-nearest is what we want
and use, and the functions that explicitly always round to nearest
aren't standard enough to worry about.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Linus Torvalds 2014-02-12 14:19:53 -08:00 • committed by Dirk Hohndel
parent 7ae05b4f71
commit 23baf20f56
8 changed files with 38 additions and 38 deletions
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dive.c
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@ -549,7 +549,7 @@ static void sanitize_cylinder_type(cylinder_type_t *type)
volume_of_air = cuft_to_l(type->size.mliter);
/* milliliters at 1 atm: "true size" */
volume = volume_of_air / surface_volume_multiplier(type->workingpressure);
type->size.mliter = volume + 0.5;
type->size.mliter = rint(volume);
}
/* Ok, we have both size and pressure: try to match a description */