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Starting from version 1.3.2 (October 2017), zstd optionally implements very-long-range search and deduplication (--long, 128 MiB window) similar to rzip or lrzip. [ 7 ] Compression speed can vary by a factor of 20 or more between the fastest and slowest levels, while decompression is uniformly fast, varying by less than 20% between the fastest ...
Context-free languages are a category of languages (sometimes termed Chomsky Type 2) which can be matched by a sequence of replacement rules, each of which essentially maps each non-terminal element to a sequence of terminal elements and/or other nonterminal elements.
Lemon is a parser generator, maintained as part of the SQLite project, that generates a look-ahead LR parser (LALR parser) in the programming language C from an input context-free grammar.
2 denotes an uncompressed chunk without a dictionary reset; 3–0x7f are invalid values; 0x80–0xff denotes an LZMA chunk, where the lowest 5 bits are used as bit 16–20 of the uncompressed size minus one, and bit 5–6 indicates what should be reset; Bits 5–6 for LZMA chunks can be: 0: nothing reset; 1: state reset
The vulnerability was patched in version 2.2.1 of Git, released on 17 December 2014, and announced the next day. [ 121 ] [ 122 ] Git version 2.6.1, released on 29 September 2015, contained a patch for a security vulnerability (CVE-2015-7545) [ 123 ] that allowed arbitrary code execution. [ 124 ]
The 7z format provides the following main features: Open, modular architecture that allows any compression, conversion, or encryption method to be stacked. High compression ratios (depending on the compression method used). AES-256 bit encryption. Zip 2.0 (Legacy) Encryption; Large file support (up to approximately 16 exbibytes, or 2 64 bytes).
The core 7z compression uses a variety of algorithms, the most common of which are bzip2, PPMd, LZMA2, and LZMA. Developed by Pavlov, LZMA is a relatively new system, making its debut as part of the 7z format. LZMA uses an LZ-based sliding dictionary of up to 3840 MB in size, backed by a range coder. [16] The native 7z file format is open and ...
LEMON is an open source graph library written in the C++ language providing implementations of common data structures and algorithms with focus on combinatorial optimization tasks connected mainly with graphs and networks.