ZBuffer Class Reference

#include <Pt/ZBuffer.h>

Stream buffer for zlib compression.

Inherits BasicStreamBuffer< char >.

Public Types
enum	Format {   Zlib = 0,   Gzip }
	Compression/decompression format. More...

Public Member Functions
	ZBuffer (Format fmt=Zlib)
	Default Constructor.
	ZBuffer (std::ios &ios, Format fmt=Zlib)
	Construct with target stream.
virtual	~ZBuffer ()
	Destructor.
void	attach (std::ios &target)
	Attach to target stream.
void	detach ()
	Detach from target stream.
void	discard ()
	Discards the buffer content and resets the state.
void	reset ()
	Detach from target stream, discard the buffer and reset the state.
void	reset (std::ios &target)
	Attach to target stream, discard the buffer and reset the state.
void	finish ()
	Finish and flush remaining data to the target stream.
std::size_t	zcount () const
	Returns the total number of decompressed bytes produced so far.
std::streamsize	import (std::streamsize maxImport=0)
	Import data from the target stream. More...
std::streamsize	speekn (char *buffer, std::streamsize size)
	Peek data in stream.
std::streamsize	out_avail ()
	Returns the number of characters buffered for output.

Protected Member Functions
virtual std::streamsize	showfull ()
	Returns the number of characters buffered for output.

Member Enumeration Documentation

Format

enum Format

Enumerator
Zlib	zlib header/trailer with Adler-32 checksum.
Gzip	gzip header/trailer with CRC-32 checksum (RFC 1952).

Member Function Documentation

import()

std::streamsize import

(

std::streamsize

maxImport = 0

)

Returns the number of bytes consumed from the underlyig stream.