[Flag] enum: Setting values

A

Arokh

Centurion
Joined
Apr 11, 2006
Messages
124
Hi,
I've created an enum with the Flag attribute and I want to use it as such, but the creating part is a little annoying.
I've tried to make it less annoying by using Math.Pow but Csharp doesn't like that:
[CSharp][FlagsAttribute]
public enum eDBFCode {
//Byte 1
//B17=Math.Pow(2,0),
B16_AId = Math.Pow(2, 1),
B15_EId = Math.Pow(2, 2),
B14_GId = Math.Pow(2, 3),
B13_LId = Math.Pow(2, 4),
B12_LstOtherEps = Math.Pow(2, 5),
B11_IsDeprecated = Math.Pow(2, 6),
B10_State = Math.Pow(2, 7),
//Byte 2
B27_Size = Math.Pow(2, 8),
B26_Ed2k = Math.Pow(2, 9),
B25_Md5 = Math.Pow(2, 10),
B24_Sha1 = Math.Pow(2, 11),
B23_Crc32 = Math.Pow(2, 12),
//B22=Math.Pow(2,13),
//B21=Math.Pow(2,14),
//B20=Math.Pow(2,15),
//Byte 3
B37_Quality = Math.Pow(2, 16),
B36_Source = Math.Pow(2, 17),
B35_AudioCodec = Math.Pow(2, 18),
B34_AudioBitRate = Math.Pow(2, 19),
B33_VideoCodec = Math.Pow(2, 20),
B32_VideoBitRate = Math.Pow(2, 21),
B31_VideoRes = Math.Pow(2, 22),
B30_FileExt = Math.Pow(2, 23),
//Byte 4
B47_DubLanguage = Math.Pow(2, 24),
B46_SubLanguage = Math.Pow(2, 25),
B45_LengthInSec = Math.Pow(2, 26),
B44_Description = Math.Pow(2, 27),
B43_ReleaseDate = Math.Pow(2, 28),
//B42=Math.Pow(2,29),
//B41=Math.Pow(2,30),
B40_AniDBFileName = Math.Pow(2, 31)
}
[/CSharp]

Is there a way of 'automatically' setting the right values for the enum?
Entering every value manually isn't something I'm too fond of.
 
I found a nice solution, with bitwise shifting.

B33_VideoCodec = 1048576 vs
B33_VideoCodec = 1 << 20

But if there is still a simpler solution let me hear it.
 
Unfortunately, C# has no built-in support for [Flags] enumerations. In other words, no automatic value assignment, no direct access to individual flags in composite values, etc..

I prefer to write hex literals for the constants, but your bit-shifting solution is probably your best bet.
 
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