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Make fixup_divep robust against insane dive times

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This fixes the case of the dive duration being zero, or being shorter
than the assumed ascent/descent time.

Reported-by: Lutz Vieweg <lvml@5t9.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2012-08-18 09:02:27 -07:00
parent c26c370c2b
commit 1a05f34ae8
1 changed files with 11 additions and 4 deletions
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15
dive.c
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@ -472,11 +472,18 @@ struct dive *fixup_dive(struct dive *dive)
cyl->sample_end.mbar = 0;
}
}
if (end < 0)
{
if (end < 0) {
/* Assume an ascent/descent rate of 9 m/min */
int asc_desc_time = dive->maxdepth.mm*60/9000;
dive->meandepth.mm = dive->maxdepth.mm*(dive->duration.seconds-asc_desc_time)/dive->duration.seconds;
int depth = dive->maxdepth.mm;
int asc_desc_time = depth*60/9000;
int duration = dive->duration.seconds;
/* Protect against insane dives - make mean be half of max */
if (duration <= asc_desc_time) {
duration = 2;
asc_desc_time = 1;
}
dive->meandepth.mm = depth*(duration-asc_desc_time)/duration;
return dive;
}