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134 lines
7.6 KiB
134 lines
7.6 KiB
/* Copyright (C) 2008-2016 Peter Palotas, Jeffrey Jangli, Alexandr Normuradov
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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using System;
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using System.Runtime.InteropServices;
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using System.Security;
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namespace Alphaleonis.Win32.Filesystem
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{
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public static partial class File
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{
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#region GetCompressedSize
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/// <summary>[AlphaFS] Retrieves the actual number of bytes of disk storage used to store a specified file.</summary>
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/// <remarks>
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/// If the file is located on a volume that supports compression and the file is compressed, the value obtained is the compressed size
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/// of the specified file. If the file is located on a volume that supports sparse files and the file is a sparse file, the value
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/// obtained is the sparse size of the specified file.
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/// </remarks>
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/// <param name="path"><para>The name of the file.</para></param>
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/// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
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/// <returns>The actual number of bytes of disk storage used to store the specified file.</returns>
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[SecurityCritical]
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public static long GetCompressedSize(string path, PathFormat pathFormat)
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{
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return GetCompressedSizeCore(null, path, pathFormat);
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}
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/// <summary>[AlphaFS] Retrieves the actual number of bytes of disk storage used to store a specified file.</summary>
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/// <remarks>
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/// If the file is located on a volume that supports compression and the file is compressed, the value obtained is the compressed size
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/// of the specified file. If the file is located on a volume that supports sparse files and the file is a sparse file, the value
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/// obtained is the sparse size of the specified file.
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/// </remarks>
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/// <param name="path"><para>The name of the file.</para></param>
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/// <returns>The actual number of bytes of disk storage used to store the specified file.</returns>
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[SecurityCritical]
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public static long GetCompressedSize(string path)
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{
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return GetCompressedSizeCore(null, path, PathFormat.RelativePath);
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}
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/// <summary>
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/// [AlphaFS] Retrieves the actual number of bytes of disk storage used to store a specified file as part of a transaction. If the file
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/// is located on a volume that supports compression and the file is compressed, the value obtained is the compressed size of the
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/// specified file. If the file is located on a volume that supports sparse files and the file is a sparse file, the value obtained is
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/// the sparse size of the specified file.
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/// </summary>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path"><para>The name of the file.</para></param>
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/// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
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/// <returns>The actual number of bytes of disk storage used to store the specified file.</returns>
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[SecurityCritical]
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public static long GetCompressedSizeTransacted(KernelTransaction transaction, string path, PathFormat pathFormat)
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{
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return GetCompressedSizeCore(transaction, path, pathFormat);
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}
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/// <summary>
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/// [AlphaFS] Retrieves the actual number of bytes of disk storage used to store a specified file as part of a transaction. If the file
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/// is located on a volume that supports compression and the file is compressed, the value obtained is the compressed size of the
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/// specified file. If the file is located on a volume that supports sparse files and the file is a sparse file, the value obtained is
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/// the sparse size of the specified file.
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/// </summary>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path"><para>The name of the file.</para></param>
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/// <returns>The actual number of bytes of disk storage used to store the specified file.</returns>
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[SecurityCritical]
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public static long GetCompressedSizeTransacted(KernelTransaction transaction, string path)
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{
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return GetCompressedSizeCore(transaction, path, PathFormat.RelativePath);
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}
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#endregion // GetCompressedSize
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#region Internal Methods
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/// <summary>Retrieves the actual number of bytes of disk storage used to store a
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/// specified file as part of a transaction. If the file is located on a volume that supports compression and the file is compressed,
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/// the value obtained is the compressed size of the specified file. If the file is located on a volume that supports sparse files and
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/// the file is a sparse file, the value obtained is the sparse size of the specified file.
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/// </summary>
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/// <exception cref="ArgumentNullException"/>
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/// <param name="transaction">The transaction.</param>
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/// <param name="path"><para>The name of the file.</para></param>
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/// <param name="pathFormat">Indicates the format of the path parameter(s).</param>
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/// <returns>The actual number of bytes of disk storage used to store the specified file.</returns>
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[SecurityCritical]
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internal static long GetCompressedSizeCore(KernelTransaction transaction, string path, PathFormat pathFormat)
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{
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if (pathFormat != PathFormat.LongFullPath && Utils.IsNullOrWhiteSpace(path))
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throw new ArgumentNullException("path");
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string pathLp = Path.GetExtendedLengthPathCore(transaction, path, pathFormat, GetFullPathOptions.RemoveTrailingDirectorySeparator | GetFullPathOptions.FullCheck);
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uint fileSizeHigh;
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uint fileSizeLow = transaction == null || !NativeMethods.IsAtLeastWindowsVista
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// GetCompressedFileSize() / GetCompressedFileSizeTransacted()
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// In the ANSI version of this function, the name is limited to 248 characters.
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// To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "\\?\" to the path.
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// 2013-01-13: MSDN does not confirm LongPath usage but a Unicode version of this function exists.
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? NativeMethods.GetCompressedFileSize(pathLp, out fileSizeHigh)
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: NativeMethods.GetCompressedFileSizeTransacted(pathLp, out fileSizeHigh, transaction.SafeHandle);
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// If the function fails, and lpFileSizeHigh is NULL, the return value is INVALID_FILE_SIZE.
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if (fileSizeLow == Win32Errors.ERROR_INVALID_FILE_SIZE && fileSizeHigh == 0)
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NativeError.ThrowException(Marshal.GetLastWin32Error(), pathLp);
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return NativeMethods.ToLong(fileSizeHigh, fileSizeLow);
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}
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#endregion // Internal Methods
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}
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}
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