The LibXDiff library implements basic and yet complete functionalities to create file differences/patches to both binary and text files. It uses memory files as file abstraction to achieve both performance and portability. For binary files, it implements both (with some modification) the algorithm described in "File System Support for Delta Compression" by Joshua P. MacDonald and the algorithm described in "Fingerprinting By Random Polynomials" by Michael O. Rabin. For text files, it follows directives described in "An O(ND) Difference Algorithm and Its Variations" by Eugene W. Myers. Memory files used by the library are basically a collection of buffers that store the file content.
The Helix Ribosome build system is a set of programs written in the Python programming language which provide a common interface to retrieving and building programs from source code stored in a CVS repository. The build system is made up of two basic subsystems. The first ("build") calculates the dependencies of a target, retrieves the source code, and runs commands to build that source code in the correct order. The second component ("Umake") is a cross-platform Makefile generator, which generates makefiles that work with MSVC, CodeWarrior, and typical Unix toolchains. Umake can be used independently from the build program.