From 2a1cd4fda8a4a8e649910d16b4dfa1ce7ae63543 Mon Sep 17 00:00:00 2001
From: chai <215380520@qq.com>
Date: Fri, 12 May 2023 09:24:40 +0800
Subject: *misc

---
 .../CsvHelper/Expressions/DynamicRecordWriter.cs   | 75 ++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/DynamicRecordWriter.cs

(limited to 'ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/DynamicRecordWriter.cs')

diff --git a/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/DynamicRecordWriter.cs b/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/DynamicRecordWriter.cs
new file mode 100644
index 0000000..a9ee401
--- /dev/null
+++ b/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/DynamicRecordWriter.cs
@@ -0,0 +1,75 @@
+// Copyright 2009-2022 Josh Close
+// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
+// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
+// https://github.com/JoshClose/CsvHelper
+using Microsoft.CSharp.RuntimeBinder;
+using System;
+using System.Collections;
+using System.Dynamic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Runtime.CompilerServices;
+
+namespace CsvHelper.Expressions
+{
+	/// <summary>
+	/// Write dynamic records.
+	/// </summary>
+	public class DynamicRecordWriter : RecordWriter
+	{
+		private readonly Hashtable getters = new Hashtable();
+
+		/// <summary>
+		/// Initializes a new instance using the given writer.
+		/// </summary>
+		/// <param name="writer">The writer.</param>
+		public DynamicRecordWriter(CsvWriter writer) : base(writer) { }
+
+		/// <summary>
+		/// Creates a <see cref="Delegate"/> of type <see cref="Action{T}"/>
+		/// that will write the given record using the current writer row.
+		/// </summary>
+		/// <typeparam name="T">The record type.</typeparam>
+		/// <param name="record">The record.</param>
+		protected override Action<T> CreateWriteDelegate<T>(T record)
+		{
+			// http://stackoverflow.com/a/14011692/68499
+
+			Action<T> action = r =>
+			{
+				var provider = (IDynamicMetaObjectProvider)r;
+				var type = provider.GetType();
+
+				var parameterExpression = Expression.Parameter(typeof(T), "record");
+				var metaObject = provider.GetMetaObject(parameterExpression);
+				var memberNames = metaObject.GetDynamicMemberNames();
+				if (Writer.Configuration.DynamicPropertySort != null)
+				{
+					memberNames = memberNames.OrderBy(name => name, Writer.Configuration.DynamicPropertySort);
+				}
+
+				foreach (var name in memberNames)
+				{
+					var value = GetValue(name, provider);
+					Writer.WriteField(value);
+				}
+			};
+
+			return action;
+		}
+
+		private object GetValue(string name, IDynamicMetaObjectProvider target)
+		{
+			// https://stackoverflow.com/a/30757547/68499
+
+			var callSite = (CallSite<Func<CallSite, IDynamicMetaObjectProvider, object>>)getters[name];
+			if (callSite == null)
+			{
+				var getMemberBinder = Binder.GetMember(CSharpBinderFlags.None, name, typeof(DynamicRecordWriter), new CSharpArgumentInfo[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) });
+				getters[name] = callSite = CallSite<Func<CallSite, IDynamicMetaObjectProvider, object>>.Create(getMemberBinder);
+			}
+
+			return callSite.Target(callSite, target);
+		}
+	}
+}
\ No newline at end of file
-- 
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