// Licensed to the .NET Foundation under one or more agreements. // The .NET Foundation licenses this file to you under the MIT license. // See the LICENSE file in the project root for more information. #if NETCORE using System.Diagnostics; using System.Runtime.CompilerServices; namespace SharpCompress.Buffers { internal static class Utilities { [MethodImpl(MethodImplOptions.AggressiveInlining)] internal static int SelectBucketIndex(int bufferSize) { Debug.Assert(bufferSize > 0); uint bitsRemaining = ((uint)bufferSize - 1) >> 4; int poolIndex = 0; if (bitsRemaining > 0xFFFF) { bitsRemaining >>= 16; poolIndex = 16; } if (bitsRemaining > 0xFF) { bitsRemaining >>= 8; poolIndex += 8; } if (bitsRemaining > 0xF) { bitsRemaining >>= 4; poolIndex += 4; } if (bitsRemaining > 0x3) { bitsRemaining >>= 2; poolIndex += 2; } if (bitsRemaining > 0x1) { bitsRemaining >>= 1; poolIndex += 1; } return poolIndex + (int)bitsRemaining; } [MethodImpl(MethodImplOptions.AggressiveInlining)] internal static int GetMaxSizeForBucket(int binIndex) { int maxSize = 16 << binIndex; Debug.Assert(maxSize >= 0); return maxSize; } } } #endif