//******************************************************************************************************//  WindowsIniFile.cs - Gbtc////  Copyright © 2012, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the MIT License (MIT), the "License"; you may//  not use this file except in compliance with the License. You may obtain a copy of the License at:////      http://www.opensource.org/licenses/MIT////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  08/25/2013 - J. Ritchie Carroll//       Made INI file work for both Mono and Windows based implementations.////****************************************************************************************************** using System;using System.Collections.Generic;using System.Runtime.InteropServices;using System.Text; namespace GSF.Interop{    /// <summary>    /// Represents a Windows INI style configuration file.    /// </summary>    public class WindowsIniFile : IIniFile    {        #region [ Members ]         // Constants        private const int BufferSize = 32768;         #endregion         #region [ Constructors ]         /// <summary>        /// Creates a new <see cref="WindowsIniFile"/> using the specified INI file name.        /// </summary>        /// <param name="fileName">Specified INI file name to use.</param>        public WindowsIniFile(string fileName) =>             FileName = fileName;         #endregion         #region [ Properties ]         /// <summary>        /// File name of the INI file.        /// </summary>        public string FileName { get; set; }         /// <summary>        /// Gets the value of the specified key.        /// </summary>        /// <param name="section">Section key exists in.</param>        /// <param name="entry">Name of key.</param>        /// <param name="defaultValue">Default value of key.</param>        /// <returns>Value of key.</returns>        /// <remarks>This is the default member of this class.</remarks>        public string this[string section, string entry, string defaultValue]        {            get            {                StringBuilder buffer = new(BufferSize);                GetPrivateProfileString(section, entry, defaultValue ?? "", buffer, BufferSize, FileName);                return IniFile.RemoveComments(buffer.ToString());            }        }         /// <summary>        /// Gets or sets the value of the specified key.        /// </summary>        /// <param name="section">Section key exists in.</param>        /// <param name="entry">Name of key.</param>        /// <value>The new key value to store in the INI file.</value>        /// <returns>Value of key.</returns>        /// <remarks>This is the default member of this class.</remarks>        public string this[string section, string entry]        {            get => this[section, entry, null];            set => WritePrivateProfileString(section, entry, value, FileName);        }         #endregion         #region [ Methods ]         /// <summary>        /// Gets an array of keys from the specified section in the INI file.        /// </summary>        /// <param name="section">Section to retrieve keys from.</param>        /// <returns>Array of <see cref="string"/> keys from the specified section of the INI file.</returns>        public string[] GetSectionKeys(string section)        {            List<string> keys = new();            byte[] buffer = new byte[BufferSize];            int startIndex = 0;             int readLength = GetPrivateProfileSection(section, buffer, BufferSize, FileName);             if (readLength > 0)            {                while (startIndex < readLength)                {                    int nullIndex = Array.IndexOf(buffer, (byte)0, startIndex);                     if (nullIndex > -1)                    {                        if (buffer[startIndex] > 0)                            keys.Add(IniFile.RemoveComments(Encoding.Default.GetString(buffer, startIndex, nullIndex - startIndex).RemoveCrLfs().Split('=')[0]));                         startIndex = nullIndex + 1;                    }                    else                    {                        break;                    }                }            }             return keys.ToArray();        }         /// <summary>        /// Gets an array of that section names that exist in the INI file.        /// </summary>        /// <returns>Array of <see cref="string"/> section names from the INI file.</returns>        public string[] GetSectionNames()        {            List<string> sections = new();            byte[] buffer = new byte[BufferSize];            int startIndex = 0;             int readLength = GetPrivateProfileSectionNames(buffer, BufferSize, FileName);             if (readLength > 0)            {                while (startIndex < readLength)                {                    int nullIndex = Array.IndexOf(buffer, (byte)0, startIndex);                     if (nullIndex > -1)                    {                        if (buffer[startIndex] > 0)                            sections.Add(Encoding.Default.GetString(buffer, startIndex, nullIndex - startIndex).Trim());                         startIndex = nullIndex + 1;                    }                    else                    {                        break;                    }                }            }             return sections.ToArray();        }         #endregion         #region [ Static ]         // Static Methods        [DllImport("kernel32", EntryPoint = "GetPrivateProfileString", BestFitMapping = false)]        private static extern int GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, int nSize, string lpFileName);         [DllImport("kernel32", EntryPoint = "WritePrivateProfileString", BestFitMapping = false)]        private static extern int WritePrivateProfileString(string lpAppName, string lpKeyName, string lpString, string lpFileName);         [DllImport("kernel32", EntryPoint = "GetPrivateProfileSection", BestFitMapping = false)]        private static extern int GetPrivateProfileSection(string lpAppName, byte[] lpszReturnBuffer, int nSize, string lpFileName);         [DllImport("kernel32", EntryPoint = "GetPrivateProfileSectionNames", BestFitMapping = false)]        private static extern int GetPrivateProfileSectionNames(byte[] lpszReturnBuffer, int nSize, string lpFileName);         #endregion    }}