Zlib

The Zlib library is a general purpose data compression library compatible with the gzip format. The code is thread safe, assuming that the standard librar y functions used are thread safe, such as memory allocation routines. It provides in-memory compression and decompression functions, including integrity checks of the uncompressed data.
Compression can be done in a single step if the buffers are large enough or can be done by repeated calls of the compression function. In the latter case, the application must provide more input and/or consume the output (providing more output space) before each call.
The library also supports reading and writing files in gzip(1) (.gz) for mat with an interface similar to that of stdio. The library does not install any signal handler. The decoder checks the consistency of the compressed data, so the librar y should never crash even in the case of corrupted input.