Stream which compresses / uncompresses data using the 'deflate' compression algorithm. More...

#include <OgreDeflate.h>

Inheritance diagram for Ogre::DeflateStream:

Collaboration diagram for Ogre::DeflateStream:

Public Types
enum	AccessMode { READ = 1, WRITE = 2 }

Public Member Functions
	DeflateStream (const DataStreamPtr &compressedStream, const String &tmpFileName="", size_t avail_in=0)
	Constructor for creating unnamed stream wrapping another stream. More...

	DeflateStream (const String &name, const DataStreamPtr &compressedStream, const String &tmpFileName="", size_t avail_in=0)
	Constructor for creating named stream wrapping another stream. More...

	~DeflateStream ()

void	close (void)
	Close the stream; this makes further operations invalid. More...

bool	eof (void) const
	Returns true if the stream has reached the end. More...

uint16	getAccessMode () const
	Gets the access mode of the stream. More...

virtual String	getAsString (void)
	Returns a String containing the entire stream. More...

virtual String	getLine (bool trimAfter=true)
	Returns a String containing the next line of data, optionally trimmed for whitespace. More...

const String &	getName (void)
	Returns the name of the stream, if it has one. More...

bool	isCompressedStreamValid () const
	Returns whether the compressed stream is valid deflated data. More...

virtual bool	isReadable () const
	Reports whether this stream is readable. More...

virtual bool	isWriteable () const
	Reports whether this stream is writeable. More...

void	operator delete (void *ptr)

void	operator delete (void ptr, void )

void	operator delete (void ptr, const char , int, const char *)

void	operator delete[] (void *ptr)

void	operator delete[] (void ptr, const char , int, const char *)

void *	operator new (size_t sz, const char file, int line, const char func)
	operator new, with debug line info More...

void *	operator new (size_t sz)

void *	operator new (size_t sz, void *ptr)
	placement operator new More...

void *	operator new[] (size_t sz, const char file, int line, const char func)
	array operator new, with debug line info More...

void *	operator new[] (size_t sz)

template<typename T >
DataStream &	operator>> (T &val)

size_t	read (void *buf, size_t count)
	Read the requisite number of bytes from the stream, stopping at the end of the file. More...

virtual size_t	readLine (char *buf, size_t maxCount, const String &delim="\n")
	Get a single line from the stream. More...

void	seek (size_t pos)
	Repositions the read point to a specified byte. More...

size_t	size (void) const
	Returns the total size of the data to be read from the stream, or 0 if this is indeterminate for this stream. More...

void	skip (long count)
	Skip a defined number of bytes. More...

virtual size_t	skipLine (const String &delim="\n")
	Skip a single line from the stream. More...

size_t	tell (void) const
	Returns the current byte offset from beginning. More...

size_t	write (const void *buf, size_t count)
	Write the requisite number of bytes from the stream (only applicable to streams that are not read-only) More...

Protected Member Functions
void	compressFinal ()

void	destroy ()

size_t	getAvailInForSinglePass ()

void	init ()

Protected Attributes
uint16	mAccess
	What type of access is allowed (AccessMode) More...

size_t	mAvailIn

DataStreamPtr	mCompressedStream

size_t	mCurrentPos

bool	mIsCompressedValid
	Whether the underlying stream is valid compressed data. More...

String	mName
	The name (e.g. resource name) that can be used to identify the source for this data (optional) More...

StaticCache < 16 *OGRE_STREAM_TEMP_SIZE >	mReadCache
	Cache for read data in case skipping around. More...

size_t	mSize
	Size of the data in the stream (may be 0 if size cannot be determined) More...

String	mTempFileName

unsigned char *	mTmp
	Intermediate buffer for read / write. More...

DataStreamPtr	mTmpWriteStream

z_stream *	mZStream

Detailed Description

Stream which compresses / uncompresses data using the 'deflate' compression algorithm.

Remarks: This stream is designed to wrap another stream for the actual source / destination of the compressed data, it has no concrete source / data itself. The idea is that you pass uncompressed data through this stream, and the underlying stream reads/writes compressed data to the final source.

Note: This is an alternative to using a compressed archive since it is able to compress & decompress regardless of the actual source of the stream. You should avoid using this with already compressed archives. Also note that this cannot be used as a read / write stream, only a read-only or write-only stream.

Definition at line 55 of file OgreDeflate.h.

Member Enumeration Documentation

enum Ogre::DataStream::AccessMode

inherited

Enumerator
READ
WRITE

Definition at line 179 of file OgreDataStream.h.

Constructor & Destructor Documentation

Ogre::DeflateStream::DeflateStream	(	const DataStreamPtr &	compressedStream,
		const String &	tmpFileName = `""`,
		size_t	avail_in = `0`
	)

Constructor for creating unnamed stream wrapping another stream.

Parameters

compressedStream	The stream that this stream will use when reading / writing compressed data. The access mode from this stream will be matched.
tmpFileName	Path/Filename to be used for temporary storage of incoming data
avail_in	Available data length to be uncompressed. With it we can uncompress DataStream partly.

Ogre::DeflateStream::DeflateStream	(	const String &	name,
		const DataStreamPtr &	compressedStream,
		const String &	tmpFileName = `""`,
		size_t	avail_in = `0`
	)

Constructor for creating named stream wrapping another stream.

Parameters

name	The name to give this stream
compressedStream	The stream that this stream will use when reading / writing compressed data. The access mode from this stream will be matched.
tmpFileName	Path/Filename to be used for temporary storage of incoming data
avail_in	Available data length to be uncompressed. With it we can uncompress DataStream partly.

Ogre::DeflateStream::~DeflateStream ( )

Member Function Documentation

void Ogre::DeflateStream::close ( void )

virtual

Close the stream; this makes further operations invalid.

Implements Ogre::DataStream.

void Ogre::DeflateStream::compressFinal ( )

protected

void Ogre::DeflateStream::destroy ( )

protected

bool Ogre::DeflateStream::eof ( void ) const

virtual

Returns true if the stream has reached the end.

Implements Ogre::DataStream.

uint16 Ogre::DataStream::getAccessMode ( ) const

inlineinherited

Gets the access mode of the stream.

Definition at line 202 of file OgreDataStream.h.

virtual String Ogre::DataStream::getAsString ( void )

virtualinherited

Returns a String containing the entire stream.

Remarks: This is a convenience method for text streams only, allowing you to retrieve a String object containing all the data in the stream.

size_t Ogre::DeflateStream::getAvailInForSinglePass ( )

protected

virtual String Ogre::DataStream::getLine ( bool trimAfter = true )

virtualinherited

Returns a String containing the next line of data, optionally trimmed for whitespace.

Remarks: This is a convenience method for text streams only, allowing you to retrieve a String object containing the next line of data. The data is read up to the next newline character and the result trimmed if required.

Note: If you used this function, you must open the stream in binary mode, otherwise, it'll produce unexpected results.

Parameters

trimAfter If true, the line is trimmed for whitespace (as in String.trim(true,true))

const String& Ogre::DataStream::getName ( void )

inlineinherited

Returns the name of the stream, if it has one.

Definition at line 200 of file OgreDataStream.h.

void Ogre::DeflateStream::init ( )

protected

bool Ogre::DeflateStream::isCompressedStreamValid ( ) const

inline

Returns whether the compressed stream is valid deflated data.

Remarks: If you pass this class a READ stream which is not compressed with the deflate algorithm, this method returns false and all read commands will actually be executed as passthroughs as a fallback.

Definition at line 108 of file OgreDeflate.h.

virtual bool Ogre::DataStream::isReadable ( ) const

inlinevirtualinherited

Reports whether this stream is readable.

Definition at line 204 of file OgreDataStream.h.

virtual bool Ogre::DataStream::isWriteable ( ) const

inlinevirtualinherited

Reports whether this stream is writeable.

Definition at line 206 of file OgreDataStream.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete ( void * ptr )

inlineinherited

Definition at line 96 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete	(	void *	ptr,
		void *
	)

inlineinherited

Definition at line 102 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete	(	void *	ptr,
		const char *	,
		int	,
		const char *
	)

inlineinherited

Definition at line 108 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete[] ( void * ptr )

inlineinherited

Definition at line 113 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete[]	(	void *	ptr,
		const char *	,
		int	,
		const char *
	)

inlineinherited

Definition at line 119 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new	(	size_t	sz,
		const char *	file,
		int	line,
		const char *	func
	)

inlineinherited

operator new, with debug line info

Definition at line 68 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new ( size_t sz )

inlineinherited

Definition at line 73 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new	(	size_t	sz,
		void *	ptr
	)

inlineinherited

placement operator new

Definition at line 79 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new[]	(	size_t	sz,
		const char *	file,
		int	line,
		const char *	func
	)

inlineinherited

array operator new, with debug line info

Definition at line 86 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new[] ( size_t sz )

inlineinherited

Definition at line 91 of file OgreMemoryAllocatedObject.h.

template<typename T >

DataStream& Ogre::DataStream::operator>> ( T & val )

inherited

size_t Ogre::DeflateStream::read	(	void *	buf,
		size_t	count
	)

virtual

Read the requisite number of bytes from the stream, stopping at the end of the file.

Parameters

buf	Reference to a buffer pointer
count	Number of bytes to read

Returns: The number of bytes read

Implements Ogre::DataStream.

virtual size_t Ogre::DataStream::readLine	(	char *	buf,
		size_t	maxCount,
		const String &	delim = `"\n"`
	)

virtualinherited

Get a single line from the stream.

Remarks: The delimiter character is not included in the data returned, and it is skipped over so the next read will occur after it. The buffer contents will include a terminating character.

Note: If you used this function, you must open the stream in binary mode, otherwise, it'll produce unexpected results.

Parameters

buf	Reference to a buffer pointer
maxCount	The maximum length of data to be read, excluding the terminating character
delim	The delimiter to stop at

Returns: The number of bytes read, excluding the terminating character

Reimplemented in Ogre::FileStreamDataStream, and Ogre::MemoryDataStream.

void Ogre::DeflateStream::seek ( size_t pos )

virtual

Repositions the read point to a specified byte.

Implements Ogre::DataStream.

size_t Ogre::DataStream::size ( void ) const

inlineinherited

Returns the total size of the data to be read from the stream, or 0 if this is indeterminate for this stream.

Definition at line 297 of file OgreDataStream.h.

void Ogre::DeflateStream::skip ( long count )

virtual

Skip a defined number of bytes.

This can also be a negative value, in which case the file pointer rewinds a defined number of bytes.

Implements Ogre::DataStream.

virtual size_t Ogre::DataStream::skipLine ( const String & delim = "\n" )

virtualinherited

Skip a single line from the stream.

Note: If you used this function, you must open the stream in binary mode, otherwise, it'll produce unexpected results.

Parameters

delim The delimiter(s) to stop at

Returns: The number of bytes skipped

Reimplemented in Ogre::MemoryDataStream.

size_t Ogre::DeflateStream::tell ( void ) const

virtual

Returns the current byte offset from beginning.

Implements Ogre::DataStream.

size_t Ogre::DeflateStream::write	(	const void *	buf,
		size_t	count
	)

virtual

Write the requisite number of bytes from the stream (only applicable to streams that are not read-only)

Parameters

buf	Pointer to a buffer containing the bytes to write
count	Number of bytes to write

Returns: The number of bytes written

Reimplemented from Ogre::DataStream.

Member Data Documentation

uint16 Ogre::DataStream::mAccess

protectedinherited

What type of access is allowed (AccessMode)

Definition at line 190 of file OgreDataStream.h.

size_t Ogre::DeflateStream::mAvailIn

protected

Definition at line 63 of file OgreDeflate.h.

DataStreamPtr Ogre::DeflateStream::mCompressedStream

protected

Definition at line 58 of file OgreDeflate.h.

size_t Ogre::DeflateStream::mCurrentPos

protected

Definition at line 62 of file OgreDeflate.h.

bool Ogre::DeflateStream::mIsCompressedValid

protected

Whether the underlying stream is valid compressed data.

Definition at line 72 of file OgreDeflate.h.

String Ogre::DataStream::mName

protectedinherited

The name (e.g. resource name) that can be used to identify the source for this data (optional)

Definition at line 186 of file OgreDataStream.h.

StaticCache<16 * OGRE_STREAM_TEMP_SIZE> Ogre::DeflateStream::mReadCache

protected

Cache for read data in case skipping around.

Definition at line 66 of file OgreDeflate.h.

size_t Ogre::DataStream::mSize

protectedinherited

Size of the data in the stream (may be 0 if size cannot be determined)

Definition at line 188 of file OgreDataStream.h.

String Ogre::DeflateStream::mTempFileName

protected

Definition at line 60 of file OgreDeflate.h.

unsigned char* Ogre::DeflateStream::mTmp

protected

Intermediate buffer for read / write.

Definition at line 69 of file OgreDeflate.h.

DataStreamPtr Ogre::DeflateStream::mTmpWriteStream

protected

Definition at line 59 of file OgreDeflate.h.

z_stream* Ogre::DeflateStream::mZStream

protected

Definition at line 61 of file OgreDeflate.h.

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

OgreDeflate.h

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation