Messages in this thread | | | Subject | Re: [PATCH v5] Introduce support for Systems Management Driver over WMI for Dell Systems | From | Hans de Goede <> | Date | Thu, 1 Oct 2020 11:26:36 +0200 |
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Hi,
On 9/30/20 11:02 PM, Limonciello, Mario wrote: >>> + possible_values: A file that can be read to obtain the possible >>> + values of the <attr>. Values are separated using >>> + semi-colon (``;``). >> why not use set notation from math classes assuming intergers? i.e. >> (a, b) all integers beween a and b but not including a or b (open set) >> or >> [a, b] all integerger betwen a and b including and b? (closed set) >> >> Anyway its ambiguous if the the extremes are included in the set of possible >> values as written. >> > > Enumeration attributes mean that there are fixed values, specifically not integers. > Integers are in the "integer" type and explained below. > > An example value that would be seen here is possible_values: > > Enabled;Disabled;
That might not be the best example, because in that case arguably we could export it as a boolean type (except that the WMI interface does not give us boolean as an explicit / separate type).
Mark these enum attributes are really like enums in C, so we have a fixed set of possible values which are described by strings, since using integers for it makes no sense from a human interaction pov. E.g. on the Lenovo X1C8 I have some attributes have the following possible value sets:
Package (0x03) { "High", "Normal", "Silent" },
Package (0x02) { "LCD", "ExternalDisplay" },
Package (0x02) { "Independent", "Synchronized" },
I hope this helps clarify things.
Regards,
Hans
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