An encoder and decoder for the format described in RFC 3284: "The VCDIFF Generic Differencing and Compression Data Format." The encoding strategy is largely based on Bentley-McIlroy 99: "Data Compression Using Long Common Strings." A library with a simple API is included, as well as a command-line executable that can apply the encoder and decoder to source, target, and delta files. A slight variation from the draft standard is defined to allow chunk-by-chunk decoding when only a partial delta file window is available.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.