arrange of proj structure
This commit is contained in:
Youmu Liu
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//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="MatrixMetadata"
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// Project: StgSharp
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// AuthorGroup: Nitload
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// Copyright (c) Nitload. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using System;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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namespace StgSharp.Mathematics.Numeric
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{
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public enum MatrixLayout
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{
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DenseRectangle,
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UpperTriangle,
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LowerTriangle,
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}
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public abstract class MatrixKernelBoarder
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{
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private static readonly MatrixKernelBoarder DenseSquareInstance = new DenseSquareKernelBoarder();
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private static readonly MatrixKernelBoarder LowerTriangleInstance = new LowerTriangleKernelBoarder();
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private static readonly MatrixKernelBoarder UpperTriangleInstance = new UpperTriangleKernelBoarder();
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static MatrixKernelBoarder Create(
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MatrixLayout layout
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)
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{
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return layout switch
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{
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MatrixLayout.DenseRectangle => DenseSquareInstance,
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MatrixLayout.UpperTriangle => UpperTriangleInstance,
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MatrixLayout.LowerTriangle => LowerTriangleInstance,
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_ => throw new ArgumentOutOfRangeException(nameof(layout)),
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};
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public abstract long GetIndexOffset(
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int xKernel,
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int yKernel,
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in MatrixSize size
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);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public abstract bool IsInBuffer(
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int xKernel,
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int yKernel,
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in MatrixSize enumerator
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);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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protected static long GetTriangularOrder(
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in MatrixSize enumerator
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)
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{
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return Math.Min(enumerator.KernelColumnLength, enumerator.KernelRowLength);
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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protected static bool IsWithinKernelDomain(
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in MatrixSize enumerator,
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int xKernel,
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int yKernel
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)
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{
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return xKernel >= 0 &&
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yKernel >= 0 &&
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xKernel < enumerator.KernelColumnLength &&
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yKernel < enumerator.KernelRowLength;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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protected static bool IsWithinTriangularDomain(
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in MatrixSize enumerator,
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int xKernel,
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int yKernel
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)
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{
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long order = GetTriangularOrder(enumerator);
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return xKernel >= 0 && yKernel >= 0 && xKernel < order && yKernel < order;
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}
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private sealed class DenseSquareKernelBoarder : MatrixKernelBoarder
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public override long GetIndexOffset(
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int xKernel,
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int yKernel,
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in MatrixSize enumerator
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)
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{
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long x = xKernel;
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long y = yKernel;
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long col = enumerator.KernelColumnLength;
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// Console.Write($"Attempt to get offset at ({x},{y}), offset is {x * col + y} ");
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return x * col + y;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public override bool IsInBuffer(
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int xKernel,
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int yKernel,
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in MatrixSize enumerator
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)
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{
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return IsWithinKernelDomain(enumerator, xKernel, yKernel);
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}
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}
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private sealed class LowerTriangleKernelBoarder : MatrixKernelBoarder
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public override long GetIndexOffset(
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int xKernel,
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int yKernel,
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in MatrixSize enumerator
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)
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{
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long order = GetTriangularOrder(enumerator);
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long x = xKernel;
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long y = yKernel;
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long prefixColumns = x * order - (x * (x - 1L)) / 2L;
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return prefixColumns + (y - x);
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public override bool IsInBuffer(
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int xKernel,
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int yKernel,
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in MatrixSize enumerator
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)
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{
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return IsWithinTriangularDomain(enumerator, xKernel, yKernel) && yKernel >= xKernel;
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}
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}
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private sealed unsafe class UpperTriangleKernelBoarder : MatrixKernelBoarder
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public override long GetIndexOffset(
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int xKernel,
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int yKernel,
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in MatrixSize enumerator
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)
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{
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long x = xKernel;
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long y = yKernel;
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long prefixColumns = (x * (x + 1L)) / 2L;
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return prefixColumns + y;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public override bool IsInBuffer(
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int xKernel,
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int yKernel,
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in MatrixSize enumerator
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)
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{
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return IsWithinTriangularDomain(enumerator, xKernel, yKernel) && yKernel <= xKernel;
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}
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}
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}
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[StructLayout(LayoutKind.Explicit)]
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public struct MatrixSize
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{
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[FieldOffset(0)] public readonly int ElementColumnLength;
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[FieldOffset(4)] public readonly int ElementRowLength;
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[FieldOffset(8)] public readonly int KernelColumnLength;
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[FieldOffset(12)] public readonly int KernelRowLength;
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public MatrixSize(
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int elementColumnLength,
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int elementRowLength,
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int kernelColumnLength,
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int kernelRowLength
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)
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{
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ElementColumnLength = elementColumnLength;
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ElementRowLength = elementRowLength;
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KernelColumnLength = kernelColumnLength;
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KernelRowLength = kernelRowLength;
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}
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}
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[StructLayout(LayoutKind.Explicit)]
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public struct MatrixKernelEnumerator
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{
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[FieldOffset(0)] public int CurrentColumn;
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[FieldOffset(4)] public int CurrentRow;
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[FieldOffset(8)] public readonly int KernelColumnLength;
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[FieldOffset(12)] public readonly int KernelRowLength;
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public MatrixKernelEnumerator(
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int kernelColumnLength,
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int kernelRowLength,
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int currentColumn = 0,
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int currentRow = 0
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)
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{
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CurrentColumn = currentColumn;
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CurrentRow = currentRow;
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KernelColumnLength = kernelColumnLength;
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KernelRowLength = kernelRowLength;
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}
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}
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}
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