Description

Represents a file stream.

Inheritance diagram for kFile:

Public Member Functions
kStatus	kFile_Close (kFile file)
	Performs any outstanding I/O operations and closes the underlying file. More...

kStatus	kFile_Construct (kFile file, const kChar path, kFileMode mode, kAlloc allocator)
	Constructs a kFile object. More...

kStatus	kFile_Copy (const kChar source, const kChar destination)
	Copies a file to the specified destination. More...

kStatus	kFile_CopyEx (const kChar source, const kChar destination, kCallbackFx progress, kPointer context)
	Copies a file to the specified destination with progress feedback. More...

kStatus	kFile_Delete (const kChar *path)
	Deletes the specified file. More...

kBool	kFile_Exists (const kChar *fileName)
	Reports whether the specified file exists. More...

k64u	kFile_Length (kFile file)
	Returns the current length of the file. More...

kStatus	kFile_Load (const kChar path, void data, kSize *size, kAlloc allocator)
	Reads the specified file and provides the file contents in an array. More...

kStatus	kFile_LoadTo (const kChar path, void data, kSize capacity)
	Reads the specified file into the provided array. More...

kStatus	kFile_Move (const kChar source, const kChar destination)
	Moves a file to the specified destination. More...

kStatus	kFile_MoveEx (const kChar source, const kChar destination, kCallbackFx progress, kPointer context)
	Moves a file to the specified destination with progress feedback. More...

k64u	kFile_Position (kFile file)
	Returns the current position of the read/write pointer, relative to the beginning of the file. More...

kStatus	kFile_Save (const kChar path, const kByte data, kSize size)
	Saves the specified data to the specified file. More...

kStatus	kFile_SetReadBuffer (kFile file, kSize size)
	Sets the size of the buffer used for reading. More...

kStatus	kFile_SetWriteBuffer (kFile file, kSize size)
	Sets the size of the buffer used for writing. More...

k64u	kFile_Size (const kChar *fileName)
	Reports the size the specified file, in bytes. More...

kStatus	kFile_TempName (kChar *name, kSize capacity)
	Gets a temporary file name. More...

kAlloc	kObject_Alloc (kObject object)
	Gets the memory allocator associated with this object. More...

kStatus	kObject_Clone (kObject *object, kObject source, kAlloc allocator)
	Constructs a new object by copying an existing object, including any aggregated child elements. More...

kStatus	kObject_Destroy (kObject object)
	Destroys the object. More...

kStatus	kObject_Dispose (kObject object)
	Destroys the object and any aggregated child elements. More...

kBool	kObject_Equals (kObject object, kObject other)
	Determines whether the object is equal to another object. More...

kSize	kObject_HashCode (kObject object)
	Gets a hash code representing the state of this object. More...

kBool	kObject_Is (kObject object, kType type)
	Determines whether this object is an instance of the specified type. More...

kBool	kObject_IsShared (kObject object)
	Reports whether the object is currently shared (reference count greater than one). More...

kStatus	kObject_SetPool (kObject object, kObjectPool pool)
	Sets the object pool associated with this object. More...

kStatus	kObject_Share (kObject object)
	Increments the reference count associated with this object. More...

kSize	kObject_Size (kObject object)
	Estimates the memory consumed by this object, including any aggregated child elements. More...

kType	kObject_Type (kObject object)
	Returns the type of the object. More...

k64u	kStream_BytesRead (kStream stream)
	Reports the number of bytes read from this stream. More...

k64u	kStream_BytesWritten (kStream stream)
	Reports the number of bytes written to this stream. More...

kStatus	kStream_ClearStats (kStream stream)
	Clears stream statistics (e.g. More...

kStatus	kStream_Copy (kStream stream, kStream source, kSize size)
	Copies the specified number of bytes from one stream to another. More...

kStatus	kStream_CopyEx (kStream stream, kStream source, kSize size, kCallbackFx progress, kPointer context)
	Copies the specified number of bytes from one stream to another, with progress feedback. More...

kStatus	kStream_Flush (kStream stream)
	Flushes buffered writes to the underlying medium. More...

kStatus	kStream_Read (kStream stream, void *buffer, kSize size)
	Reads the specified number of bytes from the stream. More...

kStatus	kStream_ReadSome (kStream stream, void buffer, kSize minCount, kSize maxCount, kSize bytesRead)
	Reads up to the specified number of bytes from the stream. More...

kStatus	kStream_Seek (kStream stream, k64s offset, kSeekOrigin origin)
	Moves the read/write pointer to the specified location. More...

kStatus	kStream_Write (kStream stream, const void *buffer, kSize size)
	Writes the specified number of bytes to the stream. More...

Member Function Documentation

kStatus kFile_Close ( kFile file )

Performs any outstanding I/O operations and closes the underlying file.

The purpose of the Close method is to provide an opportunity to finalize I/O and report any errors before destroying a file object. If the Destroy method is called without having closed the file, the Destroy method will close the file and ignore any errors.

The Close method should only be called once per file object. After calling the Close method, any operations other than Destroy will produce an undefined result.

Parameters

file	File object.

Returns: Operation status.

kStatus kFile_Construct	(	kFile *	file,
		const kChar *	path,
		kFileMode	mode,
		kAlloc	allocator
	)

Constructs a kFile object.

Parameters

file	Destination for the constructed object handle.
path	Path to the file.
mode	Specifies how to open the file.
allocator	Memory allocator (or kNULL for default).

Returns: Operation status.

kStatus kFile_Copy	(	const kChar *	source,
		const kChar *	destination
	)

Copies a file to the specified destination.

Parameters

source	Source file path.
destination	Destination file path.

Returns: Operation status.

kStatus kFile_CopyEx	(	const kChar *	source,
		const kChar *	destination,
		kCallbackFx	progress,
		kPointer	context
	)

Copies a file to the specified destination with progress feedback.

The specified callback will be invoked to provide feedback on the progress of the operation. The callback 'args' parameter will receive a k32u value representing the percentage completed. The callback is guaranteed to be called at least once if the operation is successful, with a progress value of 100%.

Parameters

source	Source file path.
destination	Destination file path.
progress	Optional progress callback (can be kNULL).
context	Callback context.

Returns: Operation status.

kStatus kFile_Delete ( const kChar * path )

Deletes the specified file.

Parameters

path	File path.

Returns: Operation status.

kBool kFile_Exists ( const kChar * fileName )

Reports whether the specified file exists.

Parameters

fileName Path to the file.

Returns: kTRUE if the file exists; kFALSE otherwise.

k64u kFile_Length ( kFile file )

Returns the current length of the file.

Parameters

file	File object.

Returns: Length of the file, in bytes.

kStatus kFile_Load	(	const kChar *	path,
		void *	data,
		kSize *	size,
		kAlloc	allocator
	)

Reads the specified file and provides the file contents in an array.

Parameters

path	Path to file.
data	Receives a pointer to the file contents.
size	Receives the size of the file contents.
allocator	Memory allocator (or kNULL for default).

Returns: Operation status.

kStatus kFile_LoadTo	(	const kChar *	path,
		void *	data,
		kSize	capacity
	)

Reads the specified file into the provided array.

Parameters

path	Path to file.
data	Receives file contents.
capacity	Amount of file to read, in bytes.

Returns: Operation status (kERROR_INCOMPLETE if file is smaller than capacity).

kStatus kFile_Move	(	const kChar *	source,
		const kChar *	destination
	)

Moves a file to the specified destination.

Parameters

source	Source file path.
destination	Destination file path.

Returns: Operation status.

kStatus kFile_MoveEx	(	const kChar *	source,
		const kChar *	destination,
		kCallbackFx	progress,
		kPointer	context
	)

Moves a file to the specified destination with progress feedback.

The specified callback will be invoked to provide feedback on the progress of the operation. The callback 'args' parameter will receive a k32u value representing the percentage completed. The callback is guaranteed to be called at least once if the operation is successful, with a progress value of 100%.

Parameters

source	Source file path.
destination	Destination file path.
progress	Optional progress callback (can be kNULL).
context	Callback context.

Returns: Operation status.

k64u kFile_Position ( kFile file )

Returns the current position of the read/write pointer, relative to the beginning of the file.

Parameters

file	File object.

Returns: Offset of read/write pointer from beginning of file.

kStatus kFile_Save	(	const kChar *	path,
		const kByte *	data,
		kSize	size
	)

Saves the specified data to the specified file.

Parameters

path	Path to file.
data	Pointer to the file contents.
size	Size of the file contents.

Returns: Operation status.

kStatus kFile_SetReadBuffer	(	kFile	file,
		kSize	size
	)

Sets the size of the buffer used for reading.

Buffering can improve efficiency when performing several small read operations. The default buffer size is 0.

Parameters

file	File object.
size	Size of the buffer.

Returns: Operation status.

kStatus kFile_SetWriteBuffer	(	kFile	file,
		kSize	size
	)

Sets the size of the buffer used for writing.

Buffering can improve efficiency when performing several small write operations. The default buffer size is 0.

Parameters

file	File object.
size	Size of the buffer.

Returns: Operation status.

k64u kFile_Size ( const kChar * fileName )

Reports the size the specified file, in bytes.

Parameters

fileName Path to the file.

Returns: Size of the file, in bytes.

kStatus kFile_TempName	(	kChar *	name,
		kSize	capacity
	)

Gets a temporary file name.

Parameters

name	Receives temporary file name.
capacity	Maximum number of characters (including null terminator).

Returns: Operation status.

kAlloc kObject_Alloc ( kObject object )

inherited

Gets the memory allocator associated with this object.

Most objects are constructed with an allocator, which is used to allocate the memory required by the object. Objects retain a reference to this allocator to enable further allocations and to free memory when the object is destroyed.

Parameters

object Object.

Returns: Memory allocator.

See also: kAlloc, kObject_Alloc_

kStatus kObject_Clone	(	kObject *	object,
		kObject	source,
		kAlloc	allocator
	)

inherited

Constructs a new object by copying an existing object, including any aggregated child elements.

If the source object is an object collection (e.g. kArrayList<kString>), any aggregated child objects are also cloned. In this case, the kObject_Dispose method can be used to free the cloned collection and its associated elements.

This method will fail if the source object (or an aggregated child element) does not support cloning.

Parameters

object	Receives the constructed object.
source	Source object.
allocator	Memory allocator (or kNULL for default).

Returns: Operation status.

See also: kObject_Dispose

kStatus kObject_Destroy ( kObject object )

inherited

Destroys the object.

The kObject_Destroy method destroys the object itself and any resources that are owned by the object. See Object Destruction for more information.

When an object is destroyed (or disposed), its reference count is decremented. The object is only truly destroyed when the reference count reaches zero. See Reference Counting for more information.

Parameters

object Object (or kNULL).

Returns: Operation status.

See also: Object Destruction, Reference Counting

kStatus kObject_Dispose ( kObject object )

inherited

Destroys the object and any aggregated child elements.

The kObject_Dispose method destroys the object itself, any resources that are owned by the object, and if the object represents a collection of objects, any child objects in the collection. See Object Destruction for more information.

When an object is destroyed (or disposed), its reference count is decremented. The object is only truly destroyed when the reference count reaches zero. See Reference Counting for more information.

Parameters

object Object (or kNULL).

Returns: Operation status.

See also: Object Destruction, Reference Counting

kBool kObject_Equals	(	kObject	object,
		kObject	other
	)

inherited

Determines whether the object is equal to another object.

By default, objects are compared by reference; objects are considered equal if the given handles refer to the same object instance. However, some classes override the Equals method to provide a more meaningful comparison (e.g. kString).

Parameters

object	Object.
other	Object for comparison.

Returns: kTRUE if the objects are equal.

kSize kObject_HashCode ( kObject object )

inherited

Gets a hash code representing the state of this object.

By default, objects return a hash code based on the object handle value. However, some classes override the HashCode method to provide a more useful hash (e.g. kString).

Parameters

object Object.

Returns: Hash code.

kBool kObject_Is	(	kObject	object,
		kType	type
	)

inherited

Determines whether this object is an instance of the specified type.

This function compares the type of this object with the given type. An object is considered to be an instance of a given type if a) the type represents a class and this object inherits from (or instantiates) that class, or b) the type represents an interface and this object implements the interface.

Parameters

object	Object.
type	Type.

Returns: kTRUE if the object is of the specified type; otherwise kFALSE.

See also: kObject_Is_, kType_Is

kBool kObject_IsShared ( kObject object )

inherited

Reports whether the object is currently shared (reference count greater than one).

Objects are initialized with a reference count of one. The kObject_Share method can be used to increment the reference count. The kObject_Destroy and kObject_Dispose methods decrease the reference count, and when the reference count reaches zero, the object is actually destroyed/disposed.

This method can be used to determine if the reference count of an object is currently greater than one.

This method is thread-safe.

Parameters

object Object.

Returns: kTRUE if the object is shared; kFALSE otherwise.

See also: Reference Counting, kObject_Share

kStatus kObject_SetPool	(	kObject	object,
		kObjectPool	pool
	)

inherited

Sets the object pool associated with this object.

Object pools can be used to implement custom lifecycle management. If an object has an assigned pool, then the kObjectPool_Reclaim method will be called just prior to destruction, to provide an opportunity for the object to be reclaimed.

Parameters

object	Object.
pool	Pool object (or kNULL to clear the pool assignment).

Returns: Operation status.

kStatus kObject_Share ( kObject object )

inherited

Increments the reference count associated with this object.

This method is thread-safe.

Parameters

object Object.

Returns: Operation status.

See also: reference-counting

kSize kObject_Size ( kObject object )

inherited

Estimates the memory consumed by this object, including any aggregated child elements.

This method can be optionally overridden by kObject-derived classes to report the amount of memory consumed by an object. The default implementation reports only the size of the class instance (additional allocations performed by the class are excluded).

Parameters

object Object.

Returns: Object size, in bytes.

kType kObject_Type ( kObject object )

inherited

Returns the type of the object.

Each object is an instance of a specific class type. The type handle returned by this function can be used to learn about the class.

Parameters

object Object.

Returns: Type.

See also: kType, kObject_Type_

k64u kStream_BytesRead ( kStream stream )

inherited

Reports the number of bytes read from this stream.

Parameters

stream Stream object.

Returns: Count of bytes read.

k64u kStream_BytesWritten ( kStream stream )

inherited

Reports the number of bytes written to this stream.

Parameters

stream Stream object.

Returns: Count of bytes written.

kStatus kStream_ClearStats ( kStream stream )

inherited

Clears stream statistics (e.g.

BytesRead, BytesWritten).

Parameters

stream Stream object.

Returns: Operation Status

kStatus kStream_Copy	(	kStream	stream,
		kStream	source,
		kSize	size
	)

inherited

Copies the specified number of bytes from one stream to another.

Parameters

stream	Destination stream.
source	Source stream.
size	Count of bytes to be copied.

Returns: Operation status.

kStatus kStream_CopyEx	(	kStream	stream,
		kStream	source,
		kSize	size,
		kCallbackFx	progress,
		kPointer	context
	)

inherited

Copies the specified number of bytes from one stream to another, with progress feedback.

The specified callback will be invoked to provide feedback on the progress of the operation. The callback 'args' parameter will receive a k32u value representing the percentage completed. The callback is guaranteed to be called at least once if the operation is successful, with a progress value of 100%.

Parameters

stream	Destination stream.
source	Source stream.
size	Count of bytes to be copied.
progress	Optional progress callback (can be kNULL).
context	Callback context.

Returns: Operation status.

kStatus kStream_Flush ( kStream stream )

inherited

Flushes buffered writes to the underlying medium.

Parameters

stream Stream object.

Returns: Operation status.

kStatus kStream_Read	(	kStream	stream,
		void *	buffer,
		kSize	size
	)

inherited

Reads the specified number of bytes from the stream.

Parameters

stream	Stream object.
buffer	Destination for bytes that are read.
size	Count of bytes to read.

Returns: Operation status.

kStatus kStream_ReadSome	(	kStream	stream,
		void *	buffer,
		kSize	minCount,
		kSize	maxCount,
		kSize *	bytesRead
	)

inherited

Reads up to the specified number of bytes from the stream.

Parameters

stream	Stream object.
buffer	Destination for bytes that are read.
minCount	Minimum count of bytes to read.
maxCount	Maximum count of bytes to read.
bytesRead	Receives count of bytes read.

Returns: Operation status.

kStatus kStream_Seek	(	kStream	stream,
		k64s	offset,
		kSeekOrigin	origin
	)

inherited

Moves the read/write pointer to the specified location.

Parameters

stream	Stream object.
offset	Offset by which to adjust the read/write pointer.
origin	Origin to which movement is relative (i.e. begin, current, end).

Returns: Operation status.

kStatus kStream_Write	(	kStream	stream,
		const void *	buffer,
		kSize	size
	)

inherited

Writes the specified number of bytes to the stream.

Parameters

stream	Stream object.
buffer	Bytes to be written to the stream.
size	Count of bytes to be written.

Returns: Operation status.

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

Io/kFile.h

Description

Public Member Functions

Member Function Documentation