new manage of wraps

2025-10-15 20:29:02 +08:00
parent e283490525
commit d3e0b5d005
7 changed files with 398 additions and 202 deletions
@@ -0,0 +1,143 @@
+//-----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+// file="CapacityFixedStack"
+// Project: StgSharp
+// AuthorGroup: Nitload
+// Copyright (c) Nitload. All rights reserved.
+//     
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//     
+// -----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.CompilerServices;
+
+namespace StgSharp.Commom.Collections
+{
+    [CollectionBuilder(typeof(CapacityFixedStackBuilder), nameof(CapacityFixedStackBuilder.Create))]
+    public class CapacityFixedStack<T> : IEnumerable<T>
+    {
+
+        private readonly T[] _values;
+        private int _index;
+
+        public CapacityFixedStack(int size)
+        {
+            _values = new T[size];
+            _index = -1;
+        }
+
+        public bool IsEmpty => _index == -1;
+
+        public int Count => _index + 1;
+
+        public int Capacity => _values.Length;
+
+        public ReadOnlySpan<T> AsSpan()
+        {
+            return _values.AsSpan(0, _index + 1);
+        }
+
+        public void Clear()
+        {
+            Array.Clear(_values, 0, _values.Length);
+            _index = -1;
+        }
+
+        public IEnumerator<T> GetEnumerator()
+        {
+            for (int i = _index; i >= 0; i--) {
+                yield return _values[i];
+            }
+        }
+
+        public T Peek()
+        {
+            if (_index >= 0)
+            {
+                return _values[_index];
+            } else
+            {
+                throw new InvalidOperationException("Stack is empty.");
+            }
+        }
+
+        public T Pop()
+        {
+            if (_index >= 0)
+            {
+                T item = _values[_index];
+                return item;
+            } else
+            {
+                throw new InvalidOperationException("Stack is empty.");
+            }
+        }
+
+        public void Push(T item)
+        {
+            if (_index < _values.Length - 1)
+            {
+                _values[++_index] = item;
+            } else
+            {
+                throw new InvalidOperationException("Stack is full.");
+            }
+        }
+
+        public void PushRange(ReadOnlySpan<T> span)
+        {
+            if (_index + span.Length >= _values.Length) {
+                throw new InvalidOperationException("Not enough space in the stack to push the entire span.");
+            }
+
+            Span<T> sp = _values.AsSpan(_index + 1, span.Length);
+            span.CopyTo(sp);
+            _index += span.Length;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal Span<T> GetValueLayout()
+        {
+            return _values.AsSpan();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+    }
+
+    public static class CapacityFixedStackBuilder
+    {
+
+        public static CapacityFixedStack<T> Create<T>(ReadOnlySpan<T> values)
+        {
+            CapacityFixedStack<T> stack = new(values.Length);
+            Span<T> sp = stack.GetValueLayout();
+            values.CopyTo(sp);
+            return stack;
+        }
+
+    }
+}