AbstractFSNode Class Reference

#include <abstract-fs.h>

Inheritance diagram for AbstractFSNode:

Public Member Functions
virtual	~AbstractFSNode ()
virtual bool	exists () const =0
virtual bool	getChildren (AbstractFSList &list, ListMode mode, bool hidden) const =0
virtual Common::U32String	getDisplayName () const =0
virtual Common::String	getName () const =0
virtual Common::String	getPath () const =0
virtual bool	isDirectory () const =0
virtual bool	isReadable () const =0
virtual bool	isWritable () const =0
virtual Common::SeekableReadStream *	createReadStream ()=0
virtual Common::SeekableReadStream *	createReadStreamForAltStream (Common::AltStreamType altStreamType)
virtual Common::SeekableWriteStream *	createWriteStream ()=0
virtual bool	createDirectory ()=0

Static Public Member Functions
static Common::FSNode	makeFSNode (AbstractFSNode *realNode)

Protected Types
typedef Common::FSNode::ListMode	ListMode

Protected Member Functions
virtual AbstractFSNode *	getChild (const Common::String &name) const =0
virtual AbstractFSNode *	getParent () const =0

Static Protected Member Functions
static const char *	lastPathComponent (const Common::String &str, const char sep)

Detailed Description

Abstract file system node. Private subclasses implement the actual functionality.

Most of the methods correspond directly to methods in class FSNode, so if they are not documented here, look there for more information about the semantics.

Constructor & Destructor Documentation

~AbstractFSNode()

virtual AbstractFSNode::~AbstractFSNode ( )

inlinevirtual

Destructor.

Member Function Documentation

getChild()

virtual AbstractFSNode* AbstractFSNode::getChild ( const Common::String &  name ) const

protectedpure virtual

Returns the child node with the given name. When called on a non-directory node, it should handle this gracefully by returning 0. When called with a name not matching any of the files/dirs contained in this directory, a valid node should be returned, which returns 'false' upon calling the exists() method. The idea is that this node can then still can be used to create a new file via the createWriteStream() method.

Example: Calling getChild() for a node with path "/foo/bar" using name="file.txt", would produce a new node with "/foo/bar/file.txt" as path.

Note

Handling calls on non-dir nodes gracefully makes it possible to switch to a lazy type detection scheme in the future.

Parameters

name	String containing the name of the child to create a new node.

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, MorphOSFilesystemNode, AmigaOSFilesystemNode, LibRetroFilesystemNode, WindowsFilesystemNode, DrivePOSIXFilesystemNode, N64FilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

getParent()

virtual AbstractFSNode* AbstractFSNode::getParent ( ) const

protectedpure virtual

The parent node of this directory. The parent of the root is the root itself.

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, MorphOSFilesystemNode, AmigaOSFilesystemNode, LibRetroFilesystemNode, WindowsFilesystemNode, DrivePOSIXFilesystemNode, N64FilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

lastPathComponent()

static const char* AbstractFSNode::lastPathComponent ( const Common::String &  str, const char  sep  )

staticprotected

Returns the last component of a given path.

Examples: /foo/bar.txt would return /bar.txt /foo/bar/ would return /bar/

Parameters

str	String containing the path.
sep	character used to separate path components

Returns

Pointer to the first char of the last component inside str.

makeFSNode()

static Common::FSNode AbstractFSNode::makeFSNode ( AbstractFSNode *  realNode )

inlinestatic

Construct a FSNode object from an AbstractFSNode object.

This is a helper to create Common::FSNode objects when the backend's FileSystemFactory cannot create the given AbstractFSNode object itself. All other code is supposed to use Common::FSNode's constructor itself.

Parameters

realNode

Pointer to a heap allocated instance. FSNode will take ownership of the pointer.

getChildren()

virtual bool AbstractFSNode::getChildren ( AbstractFSList &  list, ListMode  mode, bool  hidden  ) const

pure virtual

Return a list of child nodes of this directory node. If called on a node that does not represent a directory, false is returned.

Parameters

list	List to put the contents of the directory in.
mode	Mode to use while listing the directory.
hidden	Whether to include hidden files or not in the results.

Returns

true if successful, false otherwise (e.g. when the directory does not exist).

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, MorphOSFilesystemNode, AmigaOSFilesystemNode, LibRetroFilesystemNode, WindowsFilesystemNode, DrivePOSIXFilesystemNode, N64FilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

getDisplayName()

virtual Common::U32String AbstractFSNode::getDisplayName ( ) const

pure virtual

Returns a human readable path string.

Note

By default, this method returns the value of getName().

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, AmigaOSFilesystemNode, MorphOSFilesystemNode, WindowsFilesystemNode, LibRetroFilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, RISCOSFilesystemNode, N64FilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

getName()

virtual Common::String AbstractFSNode::getName ( ) const

pure virtual

Returns the last component of the path pointed by this FSNode.

Examples (POSIX): /foo/bar.txt would return /bar.txt /foo/bar/ would return /bar/

Note

This method is very architecture dependent, please check the concrete implementation for more information.

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, AmigaOSFilesystemNode, MorphOSFilesystemNode, WindowsFilesystemNode, LibRetroFilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, RISCOSFilesystemNode, N64FilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

getPath()

virtual Common::String AbstractFSNode::getPath ( ) const

pure virtual

Returns the 'path' of the current node, usable in fopen().

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, AmigaOSFilesystemNode, MorphOSFilesystemNode, WindowsFilesystemNode, LibRetroFilesystemNode, N64FilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

isDirectory()

virtual bool AbstractFSNode::isDirectory ( ) const

pure virtual

Indicates whether this path refers to a directory or not.

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, AmigaOSFilesystemNode, MorphOSFilesystemNode, LibRetroFilesystemNode, WindowsFilesystemNode, N64FilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

isReadable()

virtual bool AbstractFSNode::isReadable ( ) const

pure virtual

Indicates whether the object referred by this path can be read from or not.

If the path refers to a directory, readability implies being able to read and list the directory entries.

If the path refers to a file, readability implies being able to read the contents of the file.

Returns

bool true if the object can be read, false otherwise.

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, AmigaOSFilesystemNode, MorphOSFilesystemNode, LibRetroFilesystemNode, WindowsFilesystemNode, N64FilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

isWritable()

virtual bool AbstractFSNode::isWritable ( ) const

pure virtual

Indicates whether the object referred by this path can be written to or not.

If the path refers to a directory, writability implies being able to modify the directory entry (i.e. rename the directory, remove it or write files inside of it).

If the path refers to a file, writability implies being able to write data to the file.

Returns

bool true if the object can be written to, false otherwise.

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, AmigaOSFilesystemNode, MorphOSFilesystemNode, LibRetroFilesystemNode, WindowsFilesystemNode, N64FilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

createReadStream()

virtual Common::SeekableReadStream* AbstractFSNode::createReadStream ( )

pure virtual

Creates a SeekableReadStream instance corresponding to the file referred by this node. This assumes that the node actually refers to a readable file. If this is not the case, 0 is returned.

Returns

pointer to the stream object, 0 in case of a failure

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, MorphOSFilesystemNode, AmigaOSFilesystemNode, LibRetroFilesystemNode, WindowsFilesystemNode, N64FilesystemNode, WiiFilesystemNode, POSIXFilesystemNode, DrivePOSIXFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

createReadStreamForAltStream()

virtual Common::SeekableReadStream* AbstractFSNode::createReadStreamForAltStream ( Common::AltStreamType  altStreamType )

virtual

Creates a SeekableReadStream instance corresponding to an alternate stream of the file referred by this node. This assumes that the node actually refers to a readable file and the alt stream exists. If either is not the case, 0 is returned.

Returns

pointer to the stream object, 0 in case of a failure

Reimplemented in POSIXFilesystemNode.

createWriteStream()

virtual Common::SeekableWriteStream* AbstractFSNode::createWriteStream ( )

pure virtual

Creates a WriteStream instance corresponding to the file referred by this node. This assumes that the node actually refers to a readable file. If this is not the case, 0 is returned.

Returns

pointer to the stream object, 0 in case of a failure

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, MorphOSFilesystemNode, AmigaOSFilesystemNode, LibRetroFilesystemNode, WindowsFilesystemNode, N64FilesystemNode, POSIXFilesystemNode, WiiFilesystemNode, DrivePOSIXFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

createDirectory()

virtual bool AbstractFSNode::createDirectory ( )

pure virtual

Creates a directory referred by this node.

Returns

true if the directory is created successfully

Implemented in AddSAFFakeNode, AndroidSAFFilesystemNode, MorphOSFilesystemNode, AmigaOSFilesystemNode, LibRetroFilesystemNode, WindowsFilesystemNode, N64FilesystemNode, POSIXFilesystemNode, WiiFilesystemNode, RISCOSFilesystemNode, PSPFilesystemNode, KolibriOSFilesystemNode, and ChRootFilesystemNode.

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The documentation for this class was generated from the following file:

• backends/fs/abstract-fs.h