7z-memstream is an extension to the ANSI C subset of the LZMA SDK to allow processing 7z files located in memory (instead of a 7z file on disk).
Usage
Copy 7zMemInStream.c and 7zMemInStream.h to the C directory of the LZMA SDK (along with 7z.h et al.) and configure your makefile/project to include them. Usage is very simple and similar to using the default CFileInStream:
void* arcData = ...; // Data of the 7z archive.
size_t arcSize = ...; // Size of the 7z archive.
CMemInStream memStream;
MemInStream_Init(&memStream, arcData, arcSize);
// Pass &memStream.s to SzArEx_Open().License
Included files are public domain.