[[Concept:Library]]

CDimgtools: CDimg tools is a set of command line tools to manipulate CD/DVD images of certain formats.

CFFI: Convenient and reliable way of calling C code from Python. The aim of this project is to provide a convenient and reliable way of calling C code from Python. It keeps Python logic in Python, and minimises the C required. It is able to work at either the C API or ABI level, unlike most other approaches, that only support the ABI level.

CGAL: The goal of the CGAL Project is to provide easy access to efficient and reliable geometric algorithms in the form of a C++ library. CGAL is used in various areas needing geometric computation, such as: computer graphics, scientific visualization, computer aided design and modeling, geographic information systems, molecular biology, medical imaging, robotics and motion planning, mesh generation, numerical methods...
CGAL offers data structures and algorithms like triangulations (2D constrained triangulations and Delaunay triangulations in 2D and 3D), Voronoi diagrams (for 2D and 3D points, 2D additively weighted Voronoi diagrams, and segment Voronoi diagrams), Boolean operations on polygons and polyhedra, arrangements of curves and their applications (2D and 3D envelopes, Minkowski sums) mesh generation (2D Delaunay mesh generation and 3D surface mesh generation, skin surfaces), geometry processing (surface mesh simplification, subdivision and parameterization, as well as estimation of local differential properties, and approximation of ridges and umbilics), alpha shapes, convex hull algorithms (in 2D, 3D and dD), operations on polygons (straight skeleton and offset polygon), search structures (kd trees for nearest neighbor search, and range and segment trees), interpolation (natural neighbor interpolation and placement of streamlines), shape analysis, fitting, and distances (smallest enclosing sphere of points or spheres, smallest enclosing ellipsoid of points, principal component analysis), and kinetic data structures. All these data structures and algorithms operate on geometric objects like points and segments, and perform geometric tests on them. These objects and predicates are regrouped in CGAL Kernels.

CGKit (Python Computer Graphics Kit): The Python Computer Graphics Kit is a collection of Python modules that contain the basic types and functions to be able to create 3D computer graphics images (focusing on Pixar's RenderMan interface).

CHEAT: Minimal unit testing framework for the C programming language.

CImg: The CImg (Cool Image) Library is a C++ toolkit that provides simple classes and functions for loading, saving, processing and displaying images in your own C++ code. It contains useful image processing algorithms for loading/saving, resizing/rotating, filtering, object drawing (text, lines, faces, ellipses,..), and more. Images are instancied by a class able to represent images up to 4-dimension wide (from 1-D scalar signals to 3-D volumes of vector-valued pixels), with template pixel types. The package compiles it with only the standard C libraries.

CLN: CLN is a C++ class library for numbers: integers, rational, float, complex, modular integer. It implements elementary, logical, transcendental functions. Unlimited precision, 100 million digits are no problem. Easy to use because of algebraic syntax and automatic memory management.

CMUSphinx- base: Sphinx is a speaker-independent large vocabulary continuous speech recognizer. It is also a collection of free software tools and resources that allows researchers and developers to build speech recognition systems. The packages that the CMU Sphinx Group is releasing are a set of reasonably mature, world-class speech components that provide a basic level of technology to anyone interested in creating speech-using applications without the once-prohibitive initial investment cost in research and development; the same components are open to peer review by all researchers in the field, and are used for linguistic research as well.

CUnit: CUnit is a light-weight library that allows programmers to test their C code. Test results can be browsed in multiple formats or built-in interfaces.

CWXML: CWXML is a C library for parsing and generating XML and BXML formats with a straightforward API. Initial testing indicates that it is 3 or more times faster than other popular libraries such as expat and libxml2 at parsing XML and much faster again with BXML (a free, patent-unencumbered binary-encoding format for XML data that is a replacement for an XML file that mirrors the XML markup structures in a way similar to the in-memory representations of many parser libraries).

Cadaver: 'cadaver' is a command-line WebDAV client. It supports resource upload/download/display, namespace operations (copy/move), collection deletion/creation, property manipulation, and locking operations.

Cairo: Cairo is a 2D graphics library with support for multiple output devices. Currently supported output targets include the X Window System (via both Xlib and XCB), Quartz, Win32, image buffers, PostScript, PDF, and SVG file output. Experimental backends include OpenGL, BeOS, OS/2, and DirectFB. Cairo is designed to produce consistent output on all output media while taking advantage of display hardware acceleration when available (eg. through the X Render Extension). The cairo API provides operations similar to the drawing operators of PostScript and PDF. Operations in cairo including stroking and filling cubic Bézier splines, transforming and compositing translucent images, and antialiased text rendering. All drawing operations can be transformed by any affine transformation (scale, rotation, shear, etc.) Cairo is implemented as a library written in the C programming language, but bindings are available for several different programming languages.

Cals2tiff: This is a candidate for deletion: URLs both lead to 404. sollers.ca does exist, but no mention of cals2tiff on that site. Drw (talk) 09:02, 18 July 2018 (EDT) This program is used to convert .cal files (US NAVY CALS raster file Type 1) into .tiff files (baseline TIFF bilevel images). All it really does is change the header. CALS only support compressed data, and only through CCITT group 4 algorithm (T6). Tiff revision 6.0 can support this same compression schem (among others), and therefore there is no need to change the data to convert from one format to the other.

CamlTemplate: 'CamlTemplate' is a small template processor library for Objective Caml. It can be used to generate Web pages, scripts, SQL queries, XML documents, and other sorts of text files. It provides a versatile, easy-to-learn template syntax that supports common scripting-language constructs, while encouraging a separation between presentation logic and application logic. The supported Caml data structures accomodate lists, tables, and trees of items in a straightforward manner. CamlTemplate works well with mod_caml, supports any ASCII-compatible encoding, including UTF-8, and includes optional support for multithreading.

Canvas: Canvas is a feature-rich learning management system.
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This page describes the free/libre program Canvas which you can install in your own computers. There are also online services which operate by running Canvas, but we don't recommend that way of using software. The user community can check whether to trust running a free program. There is no basis for trusting a service run by a company or by strangers. You can read more about this issue here:[1]

Caro: A gomoku-like game with addtional rules: A player can only win if: - He/she has exactly 5 continuous pieces (no more or less) - These pieces have at least a head or tail not being blocked by the opponent's piece There are 2 modes: 1 player (vs AI) and 2 players

Carom: Super fun carom board game.

Carrot: carrot is an AMQP messaging queue framework. AMQP is the Advanced Message Queuing Protocol, an open standard protocol for message orientation, queuing, routing, reliability and security. The aim of carrot is to make messaging in Python as easy as possible by providing a high-level interface for producing and consuming messages. At the same time it is a goal to re-use what is already available as much as possible. carrot has pluggable messaging back-ends, so it is possible to support several messaging systems. At the time of release, the py-amqplib based backend is considered suitable for production use. Several AMQP message broker implementations exists, including RabbitMQ, ZeroMQ and Apache ActiveMQ. You'll need to have one of these installed, personally we've been using RabbitMQ. Before you start playing with carrot, you should probably read up on AMQP, and you could start with the excellent article about using RabbitMQ under Python, Rabbits and warrens. For more detailed information, you can refer to the Wikipedia article about AMQP.

Castle Game Engine: Castle Game Engine is a cross-platform 3D and 2D game engine for Object Pascal (FPC and Lazarus). - It supports many formats for game assets, including X3D, VRML, Collada, Spine JSON, MD3 and others. - Many graphic effects are possible, including bump mapping, shadows, shaders, mirrors, screen effects. - Animation, collision detection, 3D sound and more features are available. - An extensible system of 3D objects can be used, with out-of-the-box levels, items, intelligent creatures and more. - The engine is portable -- for desktop, mobile, web plugin. The engine is also used to develop view3dscene - a full-featured X3D / VRML browser and a viewer for many other 3D and 2D game formats.

Cbase: Cbase formerly known as CFL (C Foundation Library) is a C library that simplifies systems software development on *nix systems. It includes functions for memory management, string parsing, sub-process execution, filesystem traversal, I/O, interfaces to IPC mechanisms including pseudo-terminals, shared memory, semaphores, and other facilities. It also has implementations of common dynamic data structures like linked lists, queues, stacks, and hash tables, a real-time scheduler similar to 'cron', and high-level APIs to Berkeley sockets and other networking functions. Full documentation is included. This package was formerly known as the Ping Utility Library.

Ccaudio: GNU ccAudio is a stand-alone C++ class library and newly designated GNU package for manipulating audio data, whether on disk or in memory. GNU ccAudio offers the ability to work with audio file formats on disk by treating audio data as sequenced arrays of sample data rather than as arbitrary octets as some audio file manipulation libraries do. In addition to being audio content aware, GNU ccAudio allows header manipulation for setting things like annotation fields. GNU ccAudio is also endian aware and highly portable to both posix and win32 based systems. GNU ccAudio also offers basic audio signal processing including tone data set generation and pluggable codec operations. In the future we will provide loadable free software audio codec modules for many common audio encoding formats where not patent encumbered.

Ccl: 'ccl' is the 'customizable configuration library': a collection of functions for application programmers who want to interface with user-editable configuration files containing key/value pairs. The comment, key/value, and string literal delimiters can be programatically specified at runtime. 'ccl' is designed to be simple and portable; it has a small interface consisting of five functions. It uses avl's implemenation of binary search trees for backend storage.

Ccrtp: GNU ccRTP is a high performance threadsafe C++ RTP (Real-Time Transport Protocol) stack. It can be used to build both client and server applications for audio and visual conferencing over the Internet, for streaming of realtime data, and for next generation IP based telephony systems.

Ccscript: GNU ccScript is a C++ class framework for creating a virtual machine execution system for use with and as a scripting/assembler language for state-transition driven realtime systems. It is the core of the scripting engine found in GNU Bayonne. It is meant to be used where step execution is important, and where each step is in response to a callback event or a state machine transition. It offers deterministic execution and low overhead so that many concurrent instances can run together. However, in addition to offering step machine execution, GNU ccScript loads all scripts into an active image at once. This is for performance, as all operations in the script system, to assure deterministic execution, are in memory. GNU ccScript also offers the ability to load new scripts en masse. Existing active sessions operate on the currently loaded scripts, and new sessions are offered the new script. When the last active session on an old script set completes, the entire script set is flushed from memory, so you can operate scripted servers without downtime for rebuilding script images in memory.

Cday-php: The CDAY Calendar Almanac displays historical anniversaries such as birthdays and general events. It displays the equivalent date in multiple calendar systems, including Hebrew, Julian, JDNs, Great Underground Empire (Zork), and Shire (Lord of the Rings). Separate command line and Web-based versions are available, along with a free library of thousands of events.

Ceegeye: Renamed jwcgi library to ceegeye, ceegeye is a C++ library for creating CGI (Common Gateway Interface) programs, xhtml bindings, javascript helpers, etc. Comes with several example programs to help you get acquainted with its usage. ceegeye is platform independent.

Cf4ocl

The C Framework for OpenCL, cf4ocl, is a cross-platform pure C object-oriented framework for developing and benchmarking OpenCL projects. It aims to:

Promote the rapid development of OpenCL host programs in C (with support for C++) and avoid the tedious and error-prone boilerplate code usually required.
Assist in the benchmarking of OpenCL events, such as kernel execution and data transfers. Profiling comes for free with cf4ocl.
Simplify the analysis of the OpenCL environment and of kernel requirements.
Allow for all levels of integration with existing OpenCL code: use as much or as few of cf4ocl required for your project, with full access to the underlying OpenCL objects and functions at all times.

Features:

Object-oriented interface to the OpenCL API

* New/destroy functions, no direct memory alloc/free * Easy (and extensible) device selection * Simple event dependency mechanism * User-friendly error management

OpenCL version and platform independent
Integrated profiling
Advanced device query utility
Offline kernel compiler and linker

Cgi-util: Cgi-util is a small C library for creating CGI programs for Websites. Functions are available for initialization (parsing), grabbing fields (by string, integer, double or boolean value), embedding HTML files, and more. It accepts both POST and GET request methods and has extensive error handling and support for cookies.

Cgicc

GNU cgicc is an ANSI C++ compliant class library that greatly simplifies the creation of CGI applications for the World Wide Web by doing the following:

Parses GET and POST form data transparently.
Provides string, integer, floating-point and single- and multiple-choice retrieval methods for form data.
Provides methods for saving and restoring CGI environments to aid in application debugging.
Provides full on-the-fly web-authoring generation capabilities, with support for cookies.
Supports web-authoring file upload.

Cgipplib: 'cgipplib' is a small collection of support classes used to build CGI applications.

Cgixx: The cgixx C++ CGI class library is intended as a modern Common Gateway Interface library for ISO standard C++ compilers. It is not meant to generate complex HTML forms, but rather to ensure fast and reliable conversations between a Web server's CGI and your C++ code. 'cgixx' supports standard GET, POST, HEAD, and PUT CGI methods and cookies as defined in the version 1.1 specification.

Chafa: Chafa is a command-line utility that converts all kinds of images, including animated GIFs, into ANSI/Unicode character output that can be displayed in a terminal. It is highly configurable, with support for alpha transparency and multiple color modes and color spaces, combining selectable ranges of Unicode characters to produce the desired output. The core functionality is provided by a C library with a public, well-documented API.

Cheap Threads: Cheap Threads is a collection of routines for implementing synchronous threads. It includes a scheduler and a facility for passing messages among threads. Threads may run in a round robin or according to a priority scheme. Each thread must voluntarily relinquish control from time, via an ordinary function return, so that other threads can run. Since the threads are synchronous, i.e. they don't interrupt each other, they don't need to use semaphores, mutexes, critical sections, or other facilities to keep from interfering with each other. One version of Cheap Threads is designed for embedded systems.

Checker: Checker is a debugging tool suite which is used to find memory errors at runtime. 'Checker' can help find bugs that standard tools cannot always find. The best example is memory leaks. A memory leak is a zone of memory, allocated with malloc that is not used anymore. So the memory allocated is lost. This means you program needs more memory and runs slower, since your OS might have to start swapping. It detects bad memory accesses such as: reading uninitialized memory, writing in a freed zone, writing or reading outside of a memory block, and using NULL pointers. This is particularly useful for big programs with many functions. Checker maintains bitmaps to keep track of the status of each byte of memory. The status can be writable, readable, both, or none. When memory is allocated, the new memory becomes write-only: you are not allowed to read it because it has not been initialized. But when you you write to this new block, those bytes become readable and writable. When the block is freed, the bytes become unreadable and unwritable. Red zones are unreadable and unwritable memory, so that each access to a red zone produces a warning.

Chicken: CHICKEN is a simple Scheme-to-C compiler supporting the language features as defined in the 'Revised^5 Report on Scheme'. It supports full tail-recursion and first-class continuations. The code it generates is quite portable; compiled files generated by it (including itself) should work with either no or minor changes on other systems. Linking to C modules and C library functions is straightforward, and compiled programs can easily be embedded into existing C code. The package includes many extra libraries.

Chipmunk

Chipmunk is a fast 2D rigid body physics library written in C. Supports fast circle, segment, and convex polygon collisions.

Designed for 2D video games.
Circle, convex polygon, and line segment collision primitives.
Multiple collision primitives can be attached to the same rigid body.
Fast collision detection by using a spatial hash for the broad phase.
Extremely fast impulse solving by utilizing Erin Catto's contact persistence algorithm.
Support for collision callbacks based on object types.
Impulses applied to contact points can be retrieved after the impulse solver has finished.
Several kinds of joints available.
C99 implementation, no external dependencies.
Ruby extension available.
Simple, read the documentation.

Chomoko

Chomoko is a C++ Message-Queue Library Enterprise, Persistent, Message-Oriented Middleware Technical Aspects:

No dependencies
Cross-Platform
No Server Required
No Install Needed
Network-Based

Chopstx: This library has support for threads, the USB CDC class, UARTs, GPIOs, PWMs, etc

Cl-ana

cl-ana is a library of modular utilities for reasonably high performance data analysis & visualization using Common Lisp. (Reasonably means I have to be able to use it for analyzing particle accelerator data). The library is made of various sublibraries and is designed in a very bottom-up way so that if you don't care about some feature you don't have to load it. The functionality support so far are

Tabular data analysis: Read-write of large datasets stored in HDF5 files are supported, along with ntuple datasets, CSVs, and in-memory data tables. Users can add their own table types by defining 4 methods and extending the table CLOS type.

Histograms: Binned data analysis is supported with both contiguous and sparse histogram types; functional interface is provided via map (which allows reduce/fold) and filter.

Plotting: Uses gnuplot for plotting dataset samples, plain-old lisp functions, histograms, strings-as-formulae, and anything else the user wishes to add via methods on a couple of generics.

Fitting: Uses GSL for non-linear least squares fitting. Uses plain-old lisp functions as the fit functions and can fit against dataset samples, histograms, and whatever the user adds.

Generic mathematics: CL doesn't provide extendable math functions, so cl-ana provides these as well as a convenient mechanism (a single function) for using these functions instead of the non-extendable versions. Already included are error propogation and quantities (values with units, e.g. 5 meters) as well as a GNU Octave-style handling of sequences (e.g. (+ (1 2) (3 4)) --> (4 6)).

Clanlib: ClanLib is a medium level development kit. At its lowest level, it provides a platform independent way of dealing with display, sound, input, networking, files, threading, etc. Beyond that ClanLib builds a generic game development framework, giving you easy handling of resources, network object replication, graphical user interfaces (GUI) with theme support, game scripting and more. It lets game developers avoid lowlevel trivials like setting up a directdraw window, sound mixing, reading image files, etc. All those things are simplified into object oriented classes and function calls. ClanLib uses a resource system to keep track of images, fonts, samples and music. It supports Targa, PCX, JPEG, PNG and BMP for images; wave files for sample; and Ogg Vorbis and MikMod for music. The resource system separates physical data formats from your code, and makes it easy to make themes and other plugins for your game. All classes in clanlib focus on making simple interfaces that are customizeable and expandable. This keeps your game code clean and simple, but still lets you to do advanced work. ClanLib is object oriented, which lets you operate at both high and low levels, minimizing redundant code but still letting you do things not supported by clanlib's high level APIs.

Classpath: GNU Classpath (Essential Libraries for Java) is a project to create free core class libraries for use with virtual machines, compilers and tools for the Java programming language. It includes all native methods and core classes necessary for a completely functional Java runtime.s

Classpathx: The GNU Classpath Extensions project, aka classpathx builds packages in the javax namespace. It is a companion project of the GNU Classpath project. Packages currently under development include javabeans activation framework, javabean infobus, java mail, GNU inetlib and a servlet API.

ClearSilver: ClearSilver is a high-performance, powerful, and language-neutral HTML template system. It enforces a separation between presentation code and application logic which makes writing, debugging, and maintaining Web pages easier. It can be used from C/C++, Python, Perl, Java, and Ruby.

Closures: It is a code library written in a single header file that allows to create closures in C. This is possible thanks to the use of assembly code. This allows, among other things, the creation of objects in C.

Cloudgizer: Cloudgizer is a tool for building web applications as Apache modules in C language enhanced with simple markup, with emphasis on performance, small-footprint, and more productive and safer programming in C. It combines the ease of scripting with the power of C, improving the resource utilization for cloud applications. The programmer writes simple markup language mixed with C code, which is then translated entirely into C code and compiled natively as Apache module. The resulting application is fast and takes less memory, as there are no interpreters or virtual machines. Features include easy markups to use MariaDB database, HTML input parameters, cookies, simpler outputting of web pages, files storage and manipulation, encryption, encoding, program execution, web calls, safer and easier string manipulation etc. - the list is too long to place in one sentence. Overall Cloudgizer does a lot of stuff for you that you'd otherwise need to do yourself. A memory garbage collection system and memory overwrite/underwrite detection comes in handy for program stability. The same goes for string and memory handling markups to help write applications that won't crash. Also included is an application packaging system and an automated application installer. This makes rollout of products and release cycle more manageable. Cloudgizer source files have extension .v. Cloudgizer pre-compiler (cld program) will turn your .v files into .c files, ready for compilation as pure C programs. Then, your program will be compiled and linked with Apache web server on RH/Centos systems. It links with Apache as an Apache module in a "prefork" configuration. It does the work of communicating with Apache, and it makes it easier to write high-performance/small-footprint web programs in C. Cloudgizer is not designed to be thread-safe as it works in a "prefork" configuration of Apache. You can also build command-line programs. The same program can serve as both command-line utility and a web program linked with Apache. Cloudgizer works with RedHat/Centos 7 operating system, Apache web server and mariaDB database.

Clutter: Clutter is an Open GL based interactive canvas library, designed for creating fast, mainly 2D single window applications such as media box UIs, presentations, kiosk style applications and so on. It is a core part of Gnome3.

CodePY

CodePy is a C/C++ metaprogramming toolkit for Python. It handles two aspects of native-code metaprogramming:

Generating C/C++ source code.
Compiling this source code and dynamically loading it into the Python interpreter.
Both capabilities are meant to be used together, but also work on their own. In particular, the code generation facilities work well in conjunction with PyCuda. Dynamic compilation and linking are so far only supported in GNU/Linux with the GNU toolchain.

CodeTools: The CodeTools project includes packages that simplify meta-programming and help the programmer separate data from code in Python. This library contains classes that allow defining simple snippets, or "blocks", of Python code, analyze variable dependencies in the code block, and use these dependencies to construct or restrict an execution graph. These (restricted) code blocks can then be executed in any namespace. However, this project also provides a Traits-event-enhanced namespace, called a "context", which can be used in place of a vanilla namespace to allow actions to be performed whenever variables are assigned or retrieved from the namespace. This project is used as the foundation for the BlockCanvas project.

Codebird-js: Use codebird-js to connect your website or JavaScript app with the Twitter API. Support for API 1.1 is baked in!

Coin: Coin is a platform-independent retained-mode 3D graphics library that uses scene-graph data structures to render real-time graphics+suitable for mostly all kinds of scientific and engineering visualization applications. It is fully compatible with Open Inventor 2.1. Coin is built on the OpenGL immediate-mode rendering library, adds abstractions for higher-level primitives, provides 3D interactivity, increases programmer convenience and productivity, and contains optimization features for fast +rendering that are transparent for the application programmer.

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