Import YamlDotNet.

Assets/YamlDotNet/Core/Mark.cs

@@ -0,0 +1,141 @@
+// This file is part of YamlDotNet - A .NET library for YAML.
+// Copyright (c) Antoine Aubry and contributors
+//
+// 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;
+
+namespace YamlDotNet.Core
+{
+    /// <summary>
+    /// Represents a location inside a file
+    /// </summary>
+    public sealed class Mark : IEquatable<Mark>, IComparable<Mark>, IComparable
+    {
+        /// <summary>
+        /// Gets a <see cref="Mark"/> with empty values.
+        /// </summary>
+        public static readonly Mark Empty = new Mark();
+
+        /// <summary>
+        /// Gets / sets the absolute offset in the file
+        /// </summary>
+        public int Index { get; }
+
+        /// <summary>
+        /// Gets / sets the number of the line
+        /// </summary>
+        public int Line { get; }
+
+        /// <summary>
+        /// Gets / sets the index of the column
+        /// </summary>
+        public int Column { get; }
+
+        public Mark()
+        {
+            Line = 1;
+            Column = 1;
+        }
+
+        public Mark(int index, int line, int column)
+        {
+            if (index < 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(index), "Index must be greater than or equal to zero.");
+            }
+            if (line < 1)
+            {
+                throw new ArgumentOutOfRangeException(nameof(line), "Line must be greater than or equal to 1.");
+            }
+            if (column < 1)
+            {
+                throw new ArgumentOutOfRangeException(nameof(column), "Column must be greater than or equal to 1.");
+            }
+
+            Index = index;
+            Line = line;
+            Column = column;
+        }
+
+        /// <summary>
+        /// Returns a <see cref="string"/> that represents this instance.
+        /// </summary>
+        /// <returns>
+        /// A <see cref="string"/> that represents this instance.
+        /// </returns>
+        public override string ToString()
+        {
+            return $"Line: {Line}, Col: {Column}, Idx: {Index}";
+        }
+
+        /// <summary />
+        public override bool Equals(object? obj)
+        {
+            return Equals(obj as Mark);
+        }
+
+        /// <summary />
+        public bool Equals(Mark? other)
+        {
+            return other != null
+                && Index == other.Index
+                && Line == other.Line
+                && Column == other.Column;
+        }
+
+        /// <summary />
+        public override int GetHashCode()
+        {
+            return HashCode.CombineHashCodes(
+                Index.GetHashCode(),
+                HashCode.CombineHashCodes(
+                    Line.GetHashCode(),
+                    Column.GetHashCode()
+                )
+            );
+        }
+
+        /// <summary />
+        public int CompareTo(object? obj)
+        {
+            if (obj == null)
+            {
+                throw new ArgumentNullException(nameof(obj));
+            }
+            return CompareTo(obj as Mark);
+        }
+
+        /// <summary />
+        public int CompareTo(Mark? other)
+        {
+            if (other == null)
+            {
+                throw new ArgumentNullException(nameof(other));
+            }
+
+            var cmp = Line.CompareTo(other.Line);
+            if (cmp == 0)
+            {
+                cmp = Column.CompareTo(other.Column);
+            }
+            return cmp;
+        }
+    }
+}