librsync implements the rolling-checksum algorithm of remote file synchronization that was popularized by the rsync utility. This algorithm transfers the differences between 2 files without needing both files on the same system. librsync is for building other programs that transfer files as efficiently as rsync. You can use librsync in a program you write to do backups, distribute binary patches to programs, or sync directories to a server or between peers. librsync does not implement the rsync wire protocol or network functions. This tree also produces the rdiff command-line tool that exposes the key operations of librsync: generating file signatures, generating the delta from a signature to a new file, and applying the delta to regenerate the new file given the old file.
WWW: https://librsync.github.io/
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