22cea75a7a
git-svn-id: file:///srv/devel/repo-conversion/nusu@209 d2e56fa2-650e-0410-a79f-9358c0239efd
83 lines
2.7 KiB
C#
83 lines
2.7 KiB
C#
#region CPL License
|
|
/*
|
|
Nuclex Framework
|
|
Copyright (C) 2002-2010 Nuclex Development Labs
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the IBM Common Public License as
|
|
published by the IBM Corporation; either version 1.0 of the
|
|
License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
IBM Common Public License for more details.
|
|
|
|
You should have received a copy of the IBM Common Public
|
|
License along with this library
|
|
*/
|
|
#endregion
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
|
|
namespace Nuclex.Support {
|
|
|
|
/// <summary>Helper methods for working with integer types</summary>
|
|
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(this 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(this 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(this 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(this 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
|