nuclex-shared-dotnet/Nuclex.Support
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages 1 Wiki Activity

Added license tags in the files where they were amiss; added IntegerHelper class with a method to quickly determine the next power of 2 to any number

Browse source 
git-svn-id: file:///srv/devel/repo-conversion/nusu@82 d2e56fa2-650e-0410-a79f-9358c0239efd
This commit is contained in:
Markus Ewald 2008-07-17 21:19:41 +00:00
parent a666885598
commit 313b006f83
8 changed files with 244 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

61
Source/IntegerHelper.cs Normal file
View file

@ -0,0 +1,61 @@
using System;
using System.Collections.Generic;
namespace Nuclex.Support {
public static class IntegerHelper {
/// <summary>Returns the next highest power of 2 from the specified value</summary>
/// <param name="value">Value of which to return the next highest power of 2</param>
/// <returns>The next highest power of 2 to the value</returns>
public static long NextPowerOf2(long value) {
return (long)NextPowerOf2((ulong)value);
}
/// <summary>Returns the next highest power of 2 from the specified value</summary>
/// <param name="value">Value of which to return the next highest power of 2</param>
/// <returns>The next highest power of 2 to the value</returns>
public static ulong NextPowerOf2(ulong value) {
if(value == 0)
return 1;
--value;
value |= value >> 1;
value |= value >> 2;
value |= value >> 4;
value |= value >> 8;
value |= value >> 16;
value |= value >> 32;
++value;
return value;
}
/// <summary>Returns the next highest power of 2 from the specified value</summary>
/// <param name="value">Value of which to return the next highest power of 2</param>
/// <returns>The next highest power of 2 to the value</returns>
public static int NextPowerOf2(int value) {
return (int)NextPowerOf2((uint)value);
}
/// <summary>Returns the next highest power of 2 from the specified value</summary>
/// <param name="value">Value of which to return the next highest power of 2</param>
/// <returns>The next highest power of 2 to the value</returns>
public static uint NextPowerOf2(uint value) {
if(value == 0)
return 1;
--value;
value |= value >> 1;
value |= value >> 2;
value |= value >> 4;
value |= value >> 8;
value |= value >> 16;
++value;
return value;
}
}
} // namespace Nuclex.Support