ZIStream Class Reference

#include <Pt/ZStream.h>

Input stream that inflates zlib or gzip data. More...

Inherits BasicIStream< char >.

Public Types
using	Format = ZBuffer::Format
	Compression/decompression format.

Public Member Functions
	ZIStream (Format fmt=Format::Zlib)
	Construct with format.
	ZIStream (std::istream &is, Format fmt=Format::Zlib)
	Construct with target stream.
	~ZIStream ()
	Destructor.
ZBuffer &	zBuffer ()
	Returns the compression buffer.
void	attach (std::istream &is)
	Attach to target stream.
void	detach ()
	Detach from target stream.
void	reset ()
	Reset to begin new compression/decompression.
void	reset (std::istream &is)
	Reset to begin new compression/decompression.
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	peeksome (char *buffer, std::streamsize n)
	Peeks bytes in the stream buffer.
BasicStreamBuffer< char > *	buffer ()
	Returns the buffer.
void	setBuffer (BasicStreamBuffer< char > *sb)
	Sets the buffer.

Detailed Description

ZIStream owns a ZBuffer and reads uncompressed bytes from a compressed std::istream. Construct it with a format, or with a target stream and a format. attach(), detach(), reset() and finish() forward to the buffer. zBuffer() returns the owned buffer. The target is not owned.

Member Function Documentation

peeksome()

std::streamsize peeksome ( char * buffer, std::streamsize n )

inherited

The number of bytes that can be peeked depends on the current stream buffer get area and maybe less than requested, similar to istream::readsome().