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