ISPC is a compiler for a variant of the C programming language, with extensions for single program, multiple data programming. Under the SPMD model, the programmer writes a program that generally appears to be a regular serial program, though the execution model is actually that a number of program instances execute in parallel on the hardware.

PCC is a portable C compiler. The project goal is to write a C99 compiler while still keeping it small, simple, fast and understandable.

This package provides a header-only unit testing library for C/C++.

Berkeley Yacc is an LALR(1) parser generator. Yacc reads the grammar specification from a file and generates an LALR(1) parser for it. The parsers consist of a set of LALR(1) parsing tables and a driver routine written in the C programming language.

The aml library provides a portable event loop for C, with the following features:

1. file descriptor event handlers

2. timers and tickers

3. signal handlers

4. idle dispatch callbacks

5. thread pool support

libfastjson is a fork from json-c aiming to provide: a small library with essential JSON handling functions, sufficiently good JSON support (not 100% standards compliant), and very fast processing.

This package provides a C99 preprocessor written in pure Python.

This library provides a C99 implementation of the HTTP/1.1 and HTTP/2 specifications.

simdutf is a C++ library providing Unicode routines (UTF8, UTF16, UTF32). These routines are optimized for many specific architectures using SIMD (Single Instruction, Multiple Data) instructions.

StringZilla is a C/C++ header-only string library which relies on SIMD and SWAR. It implements string search, edit distances, sorting, lazy ranges, hashes and fingerprints.

nsync is a C library that exports various synchronization primitives:

1. locks,

2. condition variables,

3. run-once initialization,

4. waitable counter (useful for barriers),

5. waitable bit (useful for cancellation, or other conditions).

The Permuted Congruential Generator (PCG) extends the Linear Congruential Generator (LCG) with a permutation function to increase output randomness while retaining speed, simplicity, and conciseness.

Liblogging is an easy to use library for logging. It offers an enhanced replacement for the syslog() call, but retains its ease of use.

mimalloc is a drop-in replacement for malloc.

tinydir is a header-only C wrapper for listing directory contents.

PackCC is a packrat parser generator for the C programming language. Its main features are:

• Generates a parser in C from a grammar described in a PEG.

• Gives your parser great efficiency by packrat parsing.

• Supports direct and indirect left-recursive grammar rules.

The grammar of your parser can be described in a PEG. The PEG is a top-down parsing language, and is similar to the regular-expression grammar. The PEG does not require tokenization to be a separate step, and tokenization rules can be written in the same way as any other grammar rules.

The UDUNITS-2 package provides support for units of physical quantities. Its three main components are:

1. udunits2lib, a C library for units of physical quantities;

2. udunits2prog, a utility for obtaining the definition of a unit and for converting numeric values between compatible units; and

3. an extensive database of units.

This manual explains the C language for use with the GNU Compiler Collection (GCC) on the GNU/Linux system and other systems. We refer to this dialect as GNU C. If you already know C, you can use this as a reference manual.

This library provides a C99 framework for constructing event-driven, asynchronous network application protocols.

This library provides a C99 implementation for AWS client-side authentication.

This C library contains some essential string manipulation functions and more, like escaping special characters.

Relaxed Radix Balanced Trees are an immutable vector-like data structure with good performance characteristics for concatenation and slicing.

Calcurse is a text-based calendar and scheduling application. It helps keep track of events, appointments and everyday tasks. A configurable notification system reminds user of upcoming deadlines, and the curses based interface can be customized to suit user needs. All of the commands are documented within an online help system.

ccal is a command line program which writes a Gregorian calendar together with Chinese calendar to standard output. Its usage is similar to the cal program. In addition to console output, it can also generate Encapsulated Postscript and HTML table outputs for use in do-it-yourself calendars and web pages. It supports both simplified and traditional Chinese characters.