// Decompiled with JetBrains decompiler
// Type: Rei.Fs.IO.FileSystem
// Assembly: Rei.Fs, Version=1.13.2.8796, Culture=neutral, PublicKeyToken=null
// MVID: D8B08A8B-697C-4439-9CFF-1BE4EE46F7B0
// Assembly location: F:\Eigene Dateien\Dropbox\portable Collection\Progs\CarotDAV\Rei.Fs.dll

using Microsoft.VisualBasic.CompilerServices;
using Microsoft.Win32.SafeHandles;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;

namespace Rei.Fs.IO
{
  [StandardModule]
  public sealed class FileSystem
  {
    private static DateTime win32timeorigin = new DateTime(1601, 1, 1, 0, 0, 0, DateTimeKind.Utc);

    public static string CombinePath(string path1, string path2)
    {
      if (path1.EndsWith("\\"))
      {
        if (path2.StartsWith("\\"))
          return path1 + path2.Substring(1);
        return path1 + path2;
      }
      if (path2.StartsWith("\\"))
        return path1 + path2;
      return path1 + "\\" + path2;
    }

    public static string GetFilename(string path)
    {
      while (path.EndsWith("\\"))
        path = path.Substring(0, checked (path.Length - 1));
      int num = path.LastIndexOf("\\");
      if (num < 0)
        return path;
      return path.Substring(checked (num + 1));
    }

    public static string GetDirectoryName(string path)
    {
      while (path.EndsWith("\\"))
        path = path.Substring(0, checked (path.Length - 1));
      int length = path.LastIndexOf("\\");
      if (length < 0)
        return path;
      return path.Substring(0, length);
    }

    public static string NormalizePath(string path)
    {
      if (path.StartsWith("\\\\?\\"))
        return path;
      string str1 = path;
      if (str1.Length >= 248)
        ;
      string str2 = str1.Replace("/", "\\");
      if (str2.StartsWith("\\\\"))
        path = "\\\\?\\UNC\\" + str2.Substring(1);
      else if (path.Length > 3 && Operators.CompareString(Conversions.ToString(path[1]), ":", false) == 0 && Operators.CompareString(Conversions.ToString(path[2]), "\\", false) == 0)
        path = "\\\\?\\" + str2.Replace("/", "\\");
      else if (Operators.CompareString(Conversions.ToString(path[0]), "\\", false) == 0)
        path = "\\\\?\\" + str2.Replace("/", "\\");
      return path;
    }

    public static System.Runtime.InteropServices.ComTypes.FILETIME ToFileTime(DateTime time)
    {
      byte[] bytes = BitConverter.GetBytes(DateTime.Compare(time, FileSystem.win32timeorigin) >= 0 ? time.ToFileTime() : 0L);
      System.Runtime.InteropServices.ComTypes.FILETIME filetime;
      filetime.dwHighDateTime = BitConverter.ToInt32(bytes, 4);
      filetime.dwLowDateTime = BitConverter.ToInt32(bytes, 0);
      return filetime;
    }

    private static void RaiseError(string path)
    {
      FileSystem.RaiseError(path, Marshal.GetLastWin32Error());
    }

    private static void RaiseError(string path, int code)
    {
      switch (code)
      {
        case 2:
          throw new FileNotFoundException();
        case 3:
          throw new DirectoryNotFoundException();
        case 5:
          throw new UnauthorizedAccessException();
        case 15:
          throw new DriveNotFoundException();
        default:
          throw new IOException(new Win32Exception(code).Message);
      }
    }

    public static FileInfo GetFileInfo(string path)
    {
      FileInfo info = (FileInfo) null;
      if (!FileSystem.TryGetFileInfo(path, ref info))
        FileSystem.RaiseError(path);
      return info;
    }

    public static bool TryGetFileInfo(string path, ref FileInfo info)
    {
      string path1 = FileSystem.NormalizePath(path);
      Win32Native.WIN32_FILE_ATTRIBUTE_DATA fileData=new Win32Native.WIN32_FILE_ATTRIBUTE_DATA();
      if (!Win32Native.GetFileAttributesEx(FileSystem.NormalizePath(path), Win32Native.GET_FILEEX_INFO_LEVELS.GetFileExInfoStandard, ref fileData))
      {
        switch (Marshal.GetLastWin32Error())
        {
          case 2:
          case 3:
          case 50:
          case 67:
            return false;
          default:
            throw new ArgumentOutOfRangeException("TryGetFileInfo error path:" + path + " error:" + Conversions.ToString(Marshal.GetLastWin32Error()));
        }
      }
      else
      {
        info = new FileInfo(path1, fileData);
        return true;
      }
    }

    public static bool FileOrDirectoryExists(string path, ref bool isdirectory)
    {
      Win32Native.ErrorModeType uMode = Win32Native.SetErrorMode(Win32Native.ErrorModeType.SEM_FAILCRITICALERRORS);
      Win32Native.WIN32_FILE_ATTRIBUTE_DATA fileData = new Win32Native.WIN32_FILE_ATTRIBUTE_DATA();
      bool fileAttributesEx;
      try
      {
        fileAttributesEx = Win32Native.GetFileAttributesEx(FileSystem.NormalizePath(path), Win32Native.GET_FILEEX_INFO_LEVELS.GetFileExInfoStandard, ref fileData);
      }
      finally
      {
        int num = (int) Win32Native.SetErrorMode(uMode);
      }
      if (!fileAttributesEx)
      {
        int lastWin32Error = Marshal.GetLastWin32Error();
        switch (lastWin32Error)
        {
          case 2:
          case 3:
            break;
          default:
            throw new ArgumentOutOfRangeException(path + " " + lastWin32Error.ToString());
        }
      }
      else
        isdirectory = (fileData.dwFileAttributes & FileAttributes.Directory) != (FileAttributes) 0;
      return fileAttributesEx;
    }

    public static bool FileExists(string path)
    {
      Win32Native.ErrorModeType uMode = Win32Native.SetErrorMode(Win32Native.ErrorModeType.SEM_FAILCRITICALERRORS);
      Win32Native.WIN32_FILE_ATTRIBUTE_DATA fileData = new Win32Native.WIN32_FILE_ATTRIBUTE_DATA();
      bool fileAttributesEx;
      try
      {
        fileAttributesEx = Win32Native.GetFileAttributesEx(FileSystem.NormalizePath(path), Win32Native.GET_FILEEX_INFO_LEVELS.GetFileExInfoStandard, ref fileData);
      }
      finally
      {
        int num = (int) Win32Native.SetErrorMode(uMode);
      }
      if (!fileAttributesEx)
      {
        switch (Marshal.GetLastWin32Error())
        {
          case 2:
          case 3:
            break;
          default:
            throw new ArgumentOutOfRangeException(path);
        }
      }
      return fileAttributesEx && (fileData.dwFileAttributes & FileAttributes.Directory) == (FileAttributes) 0;
    }

    public static bool DirectoryExists(string path)
    {
      Win32Native.ErrorModeType uMode = Win32Native.SetErrorMode(Win32Native.ErrorModeType.SEM_FAILCRITICALERRORS);
      Win32Native.WIN32_FILE_ATTRIBUTE_DATA fileData = new Win32Native.WIN32_FILE_ATTRIBUTE_DATA();
      bool fileAttributesEx;
      try
      {
        fileAttributesEx = Win32Native.GetFileAttributesEx(FileSystem.NormalizePath(path), Win32Native.GET_FILEEX_INFO_LEVELS.GetFileExInfoStandard, ref fileData);
      }
      finally
      {
        int num = (int) Win32Native.SetErrorMode(uMode);
      }
      if (!fileAttributesEx)
      {
        switch (Marshal.GetLastWin32Error())
        {
          case 2:
          case 3:
            break;
          default:
            throw new ArgumentOutOfRangeException(path);
        }
      }
      return fileAttributesEx && (fileData.dwFileAttributes & FileAttributes.Directory) != (FileAttributes) 0;
    }

    public static string[] GetNetworkShare(string host)
    {
      List<string> stringList = new List<string>();
      int entriesread = 0;
      int totalentries = 0;
      int resume_handle = 0;
      int num1 = Marshal.SizeOf(typeof (Win32Native.SHARE_INFO_0));
      IntPtr zero = IntPtr.Zero;
      int hresult = Win32Native.NetShareEnum(new StringBuilder(host), 0, ref zero, uint.MaxValue, ref entriesread, ref totalentries, ref resume_handle);
      if (hresult != 0)
        throw new IOException("unknown error", hresult);
      try
      {
        IntPtr ptr = zero;
        int num2 = 0;
        int num3 = checked (entriesread - 1);
        int num4 = num2;
        while (num4 <= num3)
        {
          object structure = Marshal.PtrToStructure(ptr, typeof (Win32Native.SHARE_INFO_0));
          Win32Native.SHARE_INFO_0 shareInfo0_1=new Win32Native.SHARE_INFO_0();
          Win32Native.SHARE_INFO_0 shareInfo0_2 = structure != null ? (Win32Native.SHARE_INFO_0) structure : shareInfo0_1;
          stringList.Add(shareInfo0_2.shi0_netname);
          ptr = new IntPtr(checked (ptr.ToInt32() + num1));
          checked { ++num4; }
        }
      }
      finally
      {
        Win32Native.NetApiBufferFree(zero);
      }
      return stringList.ToArray();
    }

    public static SafeFileHandle CreateFile(string path, FileAccess access, FileShare share, FileMode mode)
    {
      return FileSystem.CreateFile(path, access, share, mode, 128U);
    }

    public static SafeFileHandle CreateFile(string path, FileAccess access, FileShare share, FileMode mode, uint dwFlagsAndAttributes)
    {
      SafeFileHandle file;
      if (mode == FileMode.Append)
      {
        file = Win32Native.CreateFile(FileSystem.NormalizePath(path), checked ((uint) access), checked ((uint) share), IntPtr.Zero, 4U, dwFlagsAndAttributes | 268435456U, IntPtr.Zero);
        if (!file.IsInvalid)
        {
          int num = (int) Win32Native.SetFilePointer(file, 0, IntPtr.Zero, Win32Native.MoveMethodType.FILE_END);
        }
      }
      else
      {
        uint dwDesiredAccess=0;
        if (access == FileAccess.Read)
          dwDesiredAccess = 2147483648U;
        else if (access == FileAccess.Write)
          dwDesiredAccess = 1073741824U;
        else if (access == FileAccess.ReadWrite)
          dwDesiredAccess = 268435456U;
        file = Win32Native.CreateFile(FileSystem.NormalizePath(path), dwDesiredAccess, checked ((uint) share), IntPtr.Zero, checked ((uint) mode), dwFlagsAndAttributes, IntPtr.Zero);
      }
      if (file.IsInvalid)
        FileSystem.RaiseError(path);
      return file;
    }

    public static Stream OpenRead(string path)
    {
      return (Stream) new FileStream(FileSystem.CreateFile(path, FileAccess.Read, FileShare.Read, FileMode.Open), FileAccess.Read);
    }

    public static void SetFileTime(string path, DateTime creationtime, DateTime accesstime, DateTime writetime)
    {
      if (DateTime.Compare(creationtime, DateTime.MinValue) == 0 && DateTime.Compare(accesstime, DateTime.MinValue) == 0 && DateTime.Compare(writetime, DateTime.MinValue) == 0)
        return;
      while (path.EndsWith("\\"))
        path = path.Substring(0, checked (path.Length - 1));
      using (SafeFileHandle file = Win32Native.CreateFile(FileSystem.NormalizePath(path), 256U, 0U, IntPtr.Zero, 3U, 33554432U, IntPtr.Zero))
      {
        if (file.IsInvalid)
          FileSystem.RaiseError(path);
        System.Runtime.InteropServices.ComTypes.FILETIME lpCreationTime = new System.Runtime.InteropServices.ComTypes.FILETIME();
        System.Runtime.InteropServices.ComTypes.FILETIME lpLastAccessTime = new System.Runtime.InteropServices.ComTypes.FILETIME();
        System.Runtime.InteropServices.ComTypes.FILETIME lpLastWriteTime = new System.Runtime.InteropServices.ComTypes.FILETIME();
        if (DateTime.Compare(creationtime, DateTime.MinValue) > 0)
          lpCreationTime = FileSystem.ToFileTime(creationtime);
        if (DateTime.Compare(accesstime, DateTime.MinValue) > 0)
          lpLastAccessTime = FileSystem.ToFileTime(accesstime);
        if (DateTime.Compare(writetime, DateTime.MinValue) > 0)
          lpLastWriteTime = FileSystem.ToFileTime(writetime);
        if (Win32Native.SetFileTime(file, ref lpCreationTime, ref lpLastAccessTime, ref lpLastWriteTime))
          return;
        FileSystem.RaiseError(path);
      }
    }

    public static FileInfo[] ListDirectoryEntries(string directorypath)
    {
      if (string.IsNullOrEmpty(directorypath))
        throw new ArgumentNullException();
      directorypath = directorypath.EndsWith("\\") || directorypath.EndsWith("/") ? FileSystem.CombinePath(directorypath, "*") : FileSystem.CombinePath(directorypath, "\\*");
      return FileSystem.FindFiles(directorypath);
    }

    public static FileInfo[] FindFiles(string path)
    {
      List<FileInfo> fileInfoList = new List<FileInfo>();
      Win32Native.WIN32_FIND_DATA lpFindFileData = new Win32Native.WIN32_FIND_DATA();
      int length = path.LastIndexOf("\\");
      int num = path.LastIndexOf("/");
      if (num > length)
        length = num;
      string path1 = length >= 0 ? path.Substring(0, length) : Environment.CurrentDirectory;
      using (SafeFindHandle firstFile = Win32Native.FindFirstFile(FileSystem.NormalizePath(path), out lpFindFileData))
      {
        if (firstFile.IsInvalid)
          FileSystem.RaiseError(path);
        do
        {
          if (Operators.CompareString(lpFindFileData.cFileName, ".", false) != 0 && Operators.CompareString(lpFindFileData.cFileName, "..", false) != 0)
            fileInfoList.Add(new FileInfo(FileSystem.CombinePath(path1, lpFindFileData.cFileName), lpFindFileData));
        }
        while (Win32Native.FindNextFile(firstFile, out lpFindFileData));
        int lastWin32Error = Marshal.GetLastWin32Error();
        if (lastWin32Error != 18)
          FileSystem.RaiseError(path, lastWin32Error);
      }
      return fileInfoList.ToArray();
    }

    public static void CreateDirectory(string path)
    {
      if (Win32Native.CreateDirectory(FileSystem.NormalizePath(path), IntPtr.Zero))
        return;
      FileSystem.RaiseError(path);
    }

    public static void DeleteFile(string path, bool recursive)
    {
      string str1 = FileSystem.NormalizePath(path);
      bool isdirectory=false;
      if (!FileSystem.FileOrDirectoryExists(str1, ref isdirectory))
        throw new FileNotFoundException();
      if (!isdirectory)
      {
        if (Win32Native.DeleteFile(str1))
          return;
        FileSystem.RaiseError(str1);
      }
      else if (!recursive)
      {
        if (Win32Native.RemoveDirectory(str1))
          return;
        FileSystem.RaiseError(str1);
      }
      else
      {
        List<string> stringList = new List<string>();
        stringList.Add(str1);
        while (stringList.Count > 0)
        {
          string str2 = stringList[checked (stringList.Count - 1)];
          FileInfo[] fileInfoArray = FileSystem.ListDirectoryEntries(str2);
          if (fileInfoArray.Length == 0)
          {
            if (!Win32Native.RemoveDirectory(str2))
              FileSystem.RaiseError(str2);
            stringList.RemoveAt(checked (stringList.Count - 1));
          }
          else
          {
            int num1 = 0;
            int num2 = checked (fileInfoArray.Length - 1);
            int index = num1;
            while (index <= num2)
            {
              if (fileInfoArray[index].IsDirectory)
                stringList.Add(FileSystem.NormalizePath(FileSystem.CombinePath(str2, fileInfoArray[index].FileName)));
              else if (!Win32Native.DeleteFile(FileSystem.NormalizePath(FileSystem.CombinePath(str2, fileInfoArray[index].FileName))))
                FileSystem.RaiseError(str2);
              checked { ++index; }
            }
          }
        }
      }
    }

    public static void MoveFile(string path1, string path2, bool overwrite)
    {
      if (!overwrite ? Win32Native.MoveFileEx(FileSystem.NormalizePath(path1), FileSystem.NormalizePath(path2), Win32Native.MoveFileFlagType.MOVEFILE_COPY_ALLOWED) : Win32Native.MoveFileEx(FileSystem.NormalizePath(path1), FileSystem.NormalizePath(path2), Win32Native.MoveFileFlagType.MOVEFILE_REPLACE_EXISTING | Win32Native.MoveFileFlagType.MOVEFILE_COPY_ALLOWED))
        return;
      int lastWin32Error = Marshal.GetLastWin32Error();
      FileSystem.RaiseError(path1, lastWin32Error);
    }

    public static void CopyFile(string path1, string path2, bool overwrite)
    {
      string str1 = FileSystem.NormalizePath(path1);
      string str2 = FileSystem.NormalizePath(path2);
      bool isdirectory1 = false;
      if (!FileSystem.FileOrDirectoryExists(str1, ref isdirectory1))
        throw new FileNotFoundException();
      bool isdirectory2 = false;
      if (!overwrite && FileSystem.FileOrDirectoryExists(str2, ref isdirectory2))
        FileSystem.RaiseError(str2, 183);
      if (!isdirectory1)
      {
        if (Win32Native.CopyFile(str1, str2, !overwrite))
          return;
        FileSystem.RaiseError(str1);
      }
      else
      {
        List<string[]> strArrayList = new List<string[]>();
        strArrayList.Add(new string[3]{ str1, str2, "d" });
        int index1 = 0;
        while (index1 < strArrayList.Count)
        {
          string[] strArray = strArrayList[index1];
          if (Operators.CompareString(strArray[2], "d", false) == 0)
          {
            FileInfo[] fileInfoArray = FileSystem.ListDirectoryEntries(strArray[0]);
            int num1 = 0;
            int num2 = checked (fileInfoArray.Length - 1);
            int index2 = num1;
            while (index2 <= num2)
            {
              if (fileInfoArray[index2].IsDirectory)
                strArrayList.Add(new string[3]
                {
                  FileSystem.NormalizePath(FileSystem.CombinePath(strArray[0], fileInfoArray[index2].FileName)),
                  FileSystem.NormalizePath(FileSystem.CombinePath(strArray[1], fileInfoArray[index2].FileName)),
                  "d"
                });
              else
                strArrayList.Add(new string[3]
                {
                  FileSystem.NormalizePath(FileSystem.CombinePath(strArray[0], fileInfoArray[index2].FileName)),
                  FileSystem.NormalizePath(FileSystem.CombinePath(strArray[1], fileInfoArray[index2].FileName)),
                  "f"
                });
              checked { ++index2; }
            }
          }
          checked { ++index1; }
        }
        int index3 = 0;
        while (index3 < strArrayList.Count)
        {
          string[] strArray = strArrayList[index3];
          if (Operators.CompareString(strArray[2], "d", false) == 0)
          {
            if (!Win32Native.CreateDirectory(strArray[1], IntPtr.Zero))
              FileSystem.RaiseError(strArray[1]);
          }
          else if (!Win32Native.CopyFile(strArray[0], strArray[1], !overwrite))
            FileSystem.RaiseError(strArray[0]);
          checked { ++index3; }
        }
      }
    }
  }
}