LibHac/libhac.Nand/DiscUtils.Core/DiscFileSystem.cs
2018-07-09 11:49:59 -05:00

509 lines
20 KiB
C#

//
// Copyright (c) 2008-2011, Kenneth Bell
//
// 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;
using System.IO;
using DiscUtils.Streams;
namespace DiscUtils
{
/// <summary>
/// Provides the base class for all file systems.
/// </summary>
public abstract class DiscFileSystem :
#if !NETCORE
MarshalByRefObject,
#endif
IFileSystem, IDisposable
{
/// <summary>
/// Initializes a new instance of the DiscFileSystem class.
/// </summary>
protected DiscFileSystem()
{
Options = new DiscFileSystemOptions();
}
/// <summary>
/// Initializes a new instance of the DiscFileSystem class.
/// </summary>
/// <param name="defaultOptions">The options instance to use for this file system instance.</param>
protected DiscFileSystem(DiscFileSystemOptions defaultOptions)
{
Options = defaultOptions;
}
/// <summary>
/// Finalizes an instance of the DiscFileSystem class.
/// </summary>
~DiscFileSystem()
{
Dispose(false);
}
/// <summary>
/// Gets the file system options, which can be modified.
/// </summary>
public virtual DiscFileSystemOptions Options { get; }
/// <summary>
/// Gets a friendly description of the file system type.
/// </summary>
public abstract string FriendlyName { get; }
/// <summary>
/// Gets a value indicating whether the file system is read-only or read-write.
/// </summary>
/// <returns>true if the file system is read-write.</returns>
public abstract bool CanWrite { get; }
/// <summary>
/// Gets the root directory of the file system.
/// </summary>
public virtual DiscDirectoryInfo Root
{
get { return new DiscDirectoryInfo(this, string.Empty); }
}
/// <summary>
/// Gets the volume label.
/// </summary>
public virtual string VolumeLabel
{
get { return string.Empty; }
}
/// <summary>
/// Gets a value indicating whether the file system is thread-safe.
/// </summary>
public virtual bool IsThreadSafe
{
get { return false; }
}
/// <summary>
/// Copies an existing file to a new file.
/// </summary>
/// <param name="sourceFile">The source file.</param>
/// <param name="destinationFile">The destination file.</param>
public virtual void CopyFile(string sourceFile, string destinationFile)
{
CopyFile(sourceFile, destinationFile, false);
}
/// <summary>
/// Copies an existing file to a new file, allowing overwriting of an existing file.
/// </summary>
/// <param name="sourceFile">The source file.</param>
/// <param name="destinationFile">The destination file.</param>
/// <param name="overwrite">Whether to permit over-writing of an existing file.</param>
public abstract void CopyFile(string sourceFile, string destinationFile, bool overwrite);
/// <summary>
/// Creates a directory.
/// </summary>
/// <param name="path">The path of the new directory.</param>
public abstract void CreateDirectory(string path);
/// <summary>
/// Deletes a directory.
/// </summary>
/// <param name="path">The path of the directory to delete.</param>
public abstract void DeleteDirectory(string path);
/// <summary>
/// Deletes a directory, optionally with all descendants.
/// </summary>
/// <param name="path">The path of the directory to delete.</param>
/// <param name="recursive">Determines if the all descendants should be deleted.</param>
public virtual void DeleteDirectory(string path, bool recursive)
{
if (recursive)
{
foreach (string dir in GetDirectories(path))
{
DeleteDirectory(dir, true);
}
foreach (string file in GetFiles(path))
{
DeleteFile(file);
}
}
DeleteDirectory(path);
}
/// <summary>
/// Deletes a file.
/// </summary>
/// <param name="path">The path of the file to delete.</param>
public abstract void DeleteFile(string path);
/// <summary>
/// Indicates if a directory exists.
/// </summary>
/// <param name="path">The path to test.</param>
/// <returns>true if the directory exists.</returns>
public abstract bool DirectoryExists(string path);
/// <summary>
/// Indicates if a file exists.
/// </summary>
/// <param name="path">The path to test.</param>
/// <returns>true if the file exists.</returns>
public abstract bool FileExists(string path);
/// <summary>
/// Indicates if a file or directory exists.
/// </summary>
/// <param name="path">The path to test.</param>
/// <returns>true if the file or directory exists.</returns>
public virtual bool Exists(string path)
{
return FileExists(path) || DirectoryExists(path);
}
/// <summary>
/// Gets the names of subdirectories in a specified directory.
/// </summary>
/// <param name="path">The path to search.</param>
/// <returns>Array of directories.</returns>
public virtual string[] GetDirectories(string path)
{
return GetDirectories(path, "*.*", SearchOption.TopDirectoryOnly);
}
/// <summary>
/// Gets the names of subdirectories in a specified directory matching a specified
/// search pattern.
/// </summary>
/// <param name="path">The path to search.</param>
/// <param name="searchPattern">The search string to match against.</param>
/// <returns>Array of directories matching the search pattern.</returns>
public virtual string[] GetDirectories(string path, string searchPattern)
{
return GetDirectories(path, searchPattern, SearchOption.TopDirectoryOnly);
}
/// <summary>
/// Gets the names of subdirectories in a specified directory matching a specified
/// search pattern, using a value to determine whether to search subdirectories.
/// </summary>
/// <param name="path">The path to search.</param>
/// <param name="searchPattern">The search string to match against.</param>
/// <param name="searchOption">Indicates whether to search subdirectories.</param>
/// <returns>Array of directories matching the search pattern.</returns>
public abstract string[] GetDirectories(string path, string searchPattern, SearchOption searchOption);
/// <summary>
/// Gets the names of files in a specified directory.
/// </summary>
/// <param name="path">The path to search.</param>
/// <returns>Array of files.</returns>
public virtual string[] GetFiles(string path)
{
return GetFiles(path, "*.*", SearchOption.TopDirectoryOnly);
}
/// <summary>
/// Gets the names of files in a specified directory.
/// </summary>
/// <param name="path">The path to search.</param>
/// <param name="searchPattern">The search string to match against.</param>
/// <returns>Array of files matching the search pattern.</returns>
public virtual string[] GetFiles(string path, string searchPattern)
{
return GetFiles(path, searchPattern, SearchOption.TopDirectoryOnly);
}
/// <summary>
/// Gets the names of files in a specified directory matching a specified
/// search pattern, using a value to determine whether to search subdirectories.
/// </summary>
/// <param name="path">The path to search.</param>
/// <param name="searchPattern">The search string to match against.</param>
/// <param name="searchOption">Indicates whether to search subdirectories.</param>
/// <returns>Array of files matching the search pattern.</returns>
public abstract string[] GetFiles(string path, string searchPattern, SearchOption searchOption);
/// <summary>
/// Gets the names of all files and subdirectories in a specified directory.
/// </summary>
/// <param name="path">The path to search.</param>
/// <returns>Array of files and subdirectories matching the search pattern.</returns>
public abstract string[] GetFileSystemEntries(string path);
/// <summary>
/// Gets the names of files and subdirectories in a specified directory matching a specified
/// search pattern.
/// </summary>
/// <param name="path">The path to search.</param>
/// <param name="searchPattern">The search string to match against.</param>
/// <returns>Array of files and subdirectories matching the search pattern.</returns>
public abstract string[] GetFileSystemEntries(string path, string searchPattern);
/// <summary>
/// Moves a directory.
/// </summary>
/// <param name="sourceDirectoryName">The directory to move.</param>
/// <param name="destinationDirectoryName">The target directory name.</param>
public abstract void MoveDirectory(string sourceDirectoryName, string destinationDirectoryName);
/// <summary>
/// Moves a file.
/// </summary>
/// <param name="sourceName">The file to move.</param>
/// <param name="destinationName">The target file name.</param>
public virtual void MoveFile(string sourceName, string destinationName)
{
MoveFile(sourceName, destinationName, false);
}
/// <summary>
/// Moves a file, allowing an existing file to be overwritten.
/// </summary>
/// <param name="sourceName">The file to move.</param>
/// <param name="destinationName">The target file name.</param>
/// <param name="overwrite">Whether to permit a destination file to be overwritten.</param>
public abstract void MoveFile(string sourceName, string destinationName, bool overwrite);
/// <summary>
/// Opens the specified file.
/// </summary>
/// <param name="path">The full path of the file to open.</param>
/// <param name="mode">The file mode for the created stream.</param>
/// <returns>The new stream.</returns>
public virtual SparseStream OpenFile(string path, FileMode mode)
{
return OpenFile(path, mode, FileAccess.ReadWrite);
}
/// <summary>
/// Opens the specified file.
/// </summary>
/// <param name="path">The full path of the file to open.</param>
/// <param name="mode">The file mode for the created stream.</param>
/// <param name="access">The access permissions for the created stream.</param>
/// <returns>The new stream.</returns>
public abstract SparseStream OpenFile(string path, FileMode mode, FileAccess access);
/// <summary>
/// Gets the attributes of a file or directory.
/// </summary>
/// <param name="path">The file or directory to inspect.</param>
/// <returns>The attributes of the file or directory.</returns>
public abstract FileAttributes GetAttributes(string path);
/// <summary>
/// Sets the attributes of a file or directory.
/// </summary>
/// <param name="path">The file or directory to change.</param>
/// <param name="newValue">The new attributes of the file or directory.</param>
public abstract void SetAttributes(string path, FileAttributes newValue);
/// <summary>
/// Gets the creation time (in local time) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <returns>The creation time.</returns>
public virtual DateTime GetCreationTime(string path)
{
return GetCreationTimeUtc(path).ToLocalTime();
}
/// <summary>
/// Sets the creation time (in local time) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <param name="newTime">The new time to set.</param>
public virtual void SetCreationTime(string path, DateTime newTime)
{
SetCreationTimeUtc(path, newTime.ToUniversalTime());
}
/// <summary>
/// Gets the creation time (in UTC) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <returns>The creation time.</returns>
public abstract DateTime GetCreationTimeUtc(string path);
/// <summary>
/// Sets the creation time (in UTC) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <param name="newTime">The new time to set.</param>
public abstract void SetCreationTimeUtc(string path, DateTime newTime);
/// <summary>
/// Gets the last access time (in local time) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <returns>The last access time.</returns>
public virtual DateTime GetLastAccessTime(string path)
{
return GetLastAccessTimeUtc(path).ToLocalTime();
}
/// <summary>
/// Sets the last access time (in local time) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <param name="newTime">The new time to set.</param>
public virtual void SetLastAccessTime(string path, DateTime newTime)
{
SetLastAccessTimeUtc(path, newTime.ToUniversalTime());
}
/// <summary>
/// Gets the last access time (in UTC) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <returns>The last access time.</returns>
public abstract DateTime GetLastAccessTimeUtc(string path);
/// <summary>
/// Sets the last access time (in UTC) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <param name="newTime">The new time to set.</param>
public abstract void SetLastAccessTimeUtc(string path, DateTime newTime);
/// <summary>
/// Gets the last modification time (in local time) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <returns>The last write time.</returns>
public virtual DateTime GetLastWriteTime(string path)
{
return GetLastWriteTimeUtc(path).ToLocalTime();
}
/// <summary>
/// Sets the last modification time (in local time) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <param name="newTime">The new time to set.</param>
public virtual void SetLastWriteTime(string path, DateTime newTime)
{
SetLastWriteTimeUtc(path, newTime.ToUniversalTime());
}
/// <summary>
/// Gets the last modification time (in UTC) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <returns>The last write time.</returns>
public abstract DateTime GetLastWriteTimeUtc(string path);
/// <summary>
/// Sets the last modification time (in UTC) of a file or directory.
/// </summary>
/// <param name="path">The path of the file or directory.</param>
/// <param name="newTime">The new time to set.</param>
public abstract void SetLastWriteTimeUtc(string path, DateTime newTime);
/// <summary>
/// Gets the length of a file.
/// </summary>
/// <param name="path">The path to the file.</param>
/// <returns>The length in bytes.</returns>
public abstract long GetFileLength(string path);
/// <summary>
/// Gets an object representing a possible file.
/// </summary>
/// <param name="path">The file path.</param>
/// <returns>The representing object.</returns>
/// <remarks>The file does not need to exist.</remarks>
public virtual DiscFileInfo GetFileInfo(string path)
{
return new DiscFileInfo(this, path);
}
/// <summary>
/// Gets an object representing a possible directory.
/// </summary>
/// <param name="path">The directory path.</param>
/// <returns>The representing object.</returns>
/// <remarks>The directory does not need to exist.</remarks>
public virtual DiscDirectoryInfo GetDirectoryInfo(string path)
{
return new DiscDirectoryInfo(this, path);
}
/// <summary>
/// Gets an object representing a possible file system object (file or directory).
/// </summary>
/// <param name="path">The file system path.</param>
/// <returns>The representing object.</returns>
/// <remarks>The file system object does not need to exist.</remarks>
public virtual DiscFileSystemInfo GetFileSystemInfo(string path)
{
return new DiscFileSystemInfo(this, path);
}
/// <summary>
/// Reads the boot code of the file system into a byte array.
/// </summary>
/// <returns>The boot code, or <c>null</c> if not available.</returns>
public virtual byte[] ReadBootCode()
{
return null;
}
/// <summary>
/// Size of the Filesystem in bytes
/// </summary>
public abstract long Size { get; }
/// <summary>
/// Used space of the Filesystem in bytes
/// </summary>
public abstract long UsedSpace { get; }
/// <summary>
/// Available space of the Filesystem in bytes
/// </summary>
public abstract long AvailableSpace { get; }
#region IDisposable Members
/// <summary>
/// Disposes of this instance, releasing all resources.
/// </summary>
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
/// <summary>
/// Disposes of this instance.
/// </summary>
/// <param name="disposing">The value <c>true</c> if Disposing.</param>
protected virtual void Dispose(bool disposing) {}
#endregion
}
}