Library: Foundation
Package: Streams
Header: Poco/DeflatingStream.h
Description
This stream compresses all data passing through it using zlib's deflate algorithm. After all data has been written to the stream, close() must be called to ensure completion of compression. Example:
std::ofstream ostr("data.gz", std::ios::binary);
DeflatingOutputStream deflater(ostr, DeflatingStreamBuf::STREAM_GZIP);
deflater << "Hello, world!" << std::endl;
deflater.close();
ostr.close();
Inheritance
Direct Base Classes: std::ostream, DeflatingIOS
All Base Classes: DeflatingIOS, std::ios, std::ostream
Member Summary
Inherited Functions: rdbuf
Constructors
DeflatingOutputStream
DeflatingOutputStream(
std::ostream & ostr,
DeflatingStreamBuf::StreamType type = DeflatingStreamBuf::STREAM_ZLIB,
int level = DeflatingStreamBuf::DEFAULT_COMPRESSION
);
Creates a DeflatingOutputStream for compressing data passed through and forwarding it to the given output stream.
DeflatingOutputStream
DeflatingOutputStream(
std::ostream & ostr,
int windowBits,
int level
);
Creates a DeflatingOutputStream for compressing data passed through and forwarding it to the given output stream.
Please refer to the zlib documentation of deflateInit2() for a description of the windowBits parameter.
Destructor
~DeflatingOutputStream
Destroys the DeflatingOutputStream.
Member Functions
close
int close();
Finishes up the stream.
Must be called when deflating to an output stream.
sync 
virtual int sync();