POSIXFilesystemNode Class Reference

#include <posix-fs.h>

Inheritance diagram for POSIXFilesystemNode:

Public Member Functions
	POSIXFilesystemNode (const Common::String &path)
bool	exists () const override
Common::U32String	getDisplayName () const override
Common::String	getName () const override
Common::String	getPath () const override
bool	isDirectory () const override
bool	isReadable () const override
bool	isWritable () const override
AbstractFSNode *	getChild (const Common::String &n) const override
bool	getChildren (AbstractFSList &list, ListMode mode, bool hidden) const override
AbstractFSNode *	getParent () const override
Common::SeekableReadStream *	createReadStream () override
Common::SeekableReadStream *	createReadStreamForAltStream (Common::AltStreamType altStreamType) override
Common::SeekableWriteStream *	createWriteStream (bool atomic) override
bool	createDirectory () override
Public Member Functions inherited from AbstractFSNode
virtual	~AbstractFSNode ()

Protected Member Functions
virtual AbstractFSNode *	makeNode (const Common::String &path) const
	POSIXFilesystemNode ()
virtual void	setFlags ()

Protected Attributes
Common::String	_displayName
Common::String	_path
bool	_isDirectory
bool	_isValid

Additional Inherited Members
Static Public Member Functions inherited from AbstractFSNode
static Common::FSNode	makeFSNode (AbstractFSNode *realNode)
Protected Types inherited from AbstractFSNode
typedef Common::FSNode::ListMode	ListMode
Static Protected Member Functions inherited from AbstractFSNode
static const char *	lastPathComponent (const Common::String &str, const char sep)

Detailed Description

Implementation of the ScummVM file system API based on POSIX.

Parts of this class are documented in the base interface class, AbstractFSNode.

Constructor & Destructor Documentation

POSIXFilesystemNode() [1/2]

POSIXFilesystemNode::POSIXFilesystemNode ( )

inlineprotected

Plain constructor, for internal use only (hence protected).

POSIXFilesystemNode() [2/2]

POSIXFilesystemNode::POSIXFilesystemNode

(

const Common::String &

path

)

Creates a POSIXFilesystemNode for a given path.

Parameters

path	the path the new node should point to.

Member Function Documentation

getDisplayName()

Common::U32String POSIXFilesystemNode::getDisplayName ( ) const

inlineoverridevirtual

Returns a human readable path string.

Note

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

Implements AbstractFSNode.

getName()

Common::String POSIXFilesystemNode::getName ( ) const

inlineoverridevirtual

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.

Implements AbstractFSNode.

getPath()

Common::String POSIXFilesystemNode::getPath ( ) const

inlineoverridevirtual

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

Implements AbstractFSNode.

isDirectory()

bool POSIXFilesystemNode::isDirectory ( ) const

inlineoverridevirtual

Indicates whether this path refers to a directory or not.

Implements AbstractFSNode.

isReadable()

bool POSIXFilesystemNode::isReadable ( ) const

overridevirtual

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.

Implements AbstractFSNode.

isWritable()

bool POSIXFilesystemNode::isWritable ( ) const

overridevirtual

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.

Implements AbstractFSNode.

getChild()

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

overridevirtual

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.

Implements AbstractFSNode.

Reimplemented in DrivePOSIXFilesystemNode.

getChildren()

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

overridevirtual

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).

Implements AbstractFSNode.

Reimplemented in DrivePOSIXFilesystemNode.

getParent()

AbstractFSNode* POSIXFilesystemNode::getParent ( ) const

overridevirtual

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

Implements AbstractFSNode.

Reimplemented in DrivePOSIXFilesystemNode.

createReadStream()

Common::SeekableReadStream* POSIXFilesystemNode::createReadStream ( )

overridevirtual

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

Implements AbstractFSNode.

Reimplemented in DrivePOSIXFilesystemNode.

createReadStreamForAltStream()

Common::SeekableReadStream* POSIXFilesystemNode::createReadStreamForAltStream ( Common::AltStreamType  altStreamType )

overridevirtual

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 from AbstractFSNode.

createWriteStream()

Common::SeekableWriteStream* POSIXFilesystemNode::createWriteStream ( bool  atomic )

overridevirtual

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.

When an atomic write stream is requested, the backend will write the data in a temporary file before moving it to its final destination.

Parameters

atomic

Request for an atomic file write when closing.

Returns

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

Implements AbstractFSNode.

Reimplemented in DrivePOSIXFilesystemNode.

createDirectory()

bool POSIXFilesystemNode::createDirectory ( )

overridevirtual

Creates a directory referred by this node.

Returns

true if the directory is created successfully

Implements AbstractFSNode.

setFlags()

virtual void POSIXFilesystemNode::setFlags ( )

protectedvirtual

Tests and sets the _isValid and _isDirectory flags, using the stat() function.

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

• backends/fs/posix/posix-fs.h