On 2011-06-24 Dan Stromberg wrote: > I'm looking for some example code (C preferred, something else if > need be) that will: > > 1) Demonstrate using liblzma (or whatever library xz-utils produces), > but producing output in the xz format, not the lzma format. > > 2) Demonstrate using liblzma (or whatever) for memory-to-memory > compression, and memory-to-memory decompression (I'm only > compressing smallish chunks, and wish to do my own I/O so I can > sidestep the buffer cache)
There are two example programs in doc/examples directory in XZ Utils source. They use multi-call mode to compress big files in a pipe. Data is passed to and from liblzma via buffers. If you want a single-call interface (one function to encode or decode a buffer holding a complete .xz file), see lzma_easy_buffer_encode, lzma_stream_buffer_encode, and lzma_stream_buffer_decode in src/liblzma/api/lzma/container.h (or /usr/include/lzma/container.h). Note that the above functions work on .xz files, not .lzma files, even though the names might suggest otherwise. The names are what they are for historical reasons: originally .xz was supposed to be .lzma, replacing the old .lzma format. It would be nice to have more tutorial programs for different use cases, but so far I haven't written anything like that. > BTW, does the underlying library API (need to) change much? liblzma API is stable. Things will be added, but old things won't change in incompatible ways. -- Lasse Collin | IRC: Larhzu @ IRCnet & Freenode
