ZStream unit

The ZStream unit implements a TStream descendent (TCompressionStream) which uses the deflate algorithm to compress everything that is written to it. The compressed data is written to the output stream, which is specified when the compressor class is created.

Likewise, a TStream descendent is implemented which reads data from an input stream (TDecompressionStream) and decompresses it with the inflate algorithm.

Classes and records

Ecompressionerror	class	Errors in the TCompressionStream class are signaled with this exception.
Edecompressionerror	class	Errors in the TDeCompressionStream class are signaled with this exception.
Egzfileerror	class	Exception class used in Tgzfilestream class.
Ezliberror	class	Base exception for exceptions in the ZStream unit.
Tcompressionstream	class	Write-only stream class which compresses data written to it.
Tcustomzlibstream	class	Ancestor for compression and decompression classes.
Tdecompressionstream	class	Reads and decompresses data from a compressed data stream.
TGZFileStream	class	Stream to read/write from a gzip file.
TGZipCompressionStream	class
TGZipDecompressionStream	class

Types

Tcompressionlevel	enumeration	Compression level for the deflate algorithm.
Tgzopenmode	enumeration	Open mode for gzip file.

Uses

• classes
• zbase
• gzio