Lennart Poettering
3b6e71ad03
At various places we accept values scaled to the range 0…2^32-1 which are exposed to the user as percentages/permille/permyriad. Let's add some helper macros (actually: typesafe macro-like functions) that help with converting our internal encoding to the external encodings. benefits: some of the previous code rounded up, some down. let's always round to nearest, to ensure that our conversions are reversible. Also, check for overflows correctly. This also adds a test that makes sure that for the full percent/permille/permyriad ranges we can convert forth and back without loss of accuracy.
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