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Improve floating point equality test

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This allows for a relative error rather than an absolute (which would set
an artificial scale). This basically says “we trust our data (which comes
from the dive computer’s measurement after all) to a certain number of
significant digits” rather than “we will never encounter anything smaller
than 1 / a million but not zero” which would be awfully unit dependent.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Robert Helling 2014-01-22 09:04:04 +01:00 committed by Dirk Hohndel
parent a566dbdaf7
commit b6a30dcdd3
1 changed files with 1 additions and 1 deletions
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dive.h
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@ -20,7 +20,7 @@
(void) (&_max1 == &_max2); \ (void) (&_max1 == &_max2); \
_max1 > _max2 ? _max1 : _max2; }) _max1 > _max2 ? _max1 : _max2; })
#define IS_FP_SAME(_a,_b) (abs((_a) - (_b)) < 0.000001) #define IS_FP_SAME(_a,_b) (abs((_a) - (_b)) < 0.000001 * MAX(abs(_a), abs(_b)))
#include <libxml/tree.h> #include <libxml/tree.h>
#include <libxslt/transform.h> #include <libxslt/transform.h>