Writing An Ncurses Game On Mac
| Developer(s) | GNU Project |
|---|---|
| Initial release | 1993; 27 years ago |
| Stable release | 6.2 / 12 February 2020; 54 days ago |
| Repository | |
| Written in | C |
| Operating system | POSIX |
| Type | Widget toolkit |
| License | X11 License[1] |
| Website | www.gnu.org/software/ncurses/ncurses.html |
ncurses (new curses) is a programming library providing an application programming interface (API) that allows the programmer to write text-based user interfaces in a terminal-independent manner. It is a toolkit for developing 'GUI-like' application software that runs under a terminal emulator. It also optimizes screen changes, in order to reduce the latency experienced when using remote shells.
There are bindings for ncurses in a variety of programming languages, including Ada,[2]Python,[3]Gambas,[4]Ruby[5], PHP,[6]JavaScript,[7] and Perl[8].
History[edit]
As the new version, ncurses is a free-software emulation of the System V Release 4.0 (SVr4) curses, which was itself an enhancement over the discontinued 4.4 BSD curses.[9] The XSI Curses standard issued by X/Open is explicitly and closely modeled on System V.
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- Jun 06, 2011 In this tutorial we'll write a simple game. Actually an old-stylish snake-game in characteric window. If you have a little free time and you want to practise, you could make the TODO list, which I.
- May 11, 2018 Simple example of a game made in C and the ncurses library (inspired by the famous sokoban game).
- Now, ncurses comes native with Mac OS X, but for other systems you might need to install it beforehand. For Ubuntu there is the libncurses5 package. There is still a little more to be done before we start coding. To get access to all the ncurses functions we have to tell the linker, to include the library at compile time.
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curses[edit]
The first curses library was developed at the University of California at Berkeley, for a BSD operating system, around 1980 to support Rogue, a text-based adventure game. It originally used the termcap library, which was used in other programs, such as the vi editor.[9]
The success of the BSD curses library prompted Bell Labs to release an enhanced curses library in their System V Release 2 Unix systems. This library was more powerful and instead of using termcap, it used terminfo. However, due to AT&T policy regarding source-code distribution, this improved curses library did not have much acceptance in the BSD community.[9]
pcurses[edit]
Around 1982, Pavel Curtis started work on a freeware clone of the Bell Labs curses, named pcurses, which was maintained by various people through 1986.[10]
ncurses[edit]
The pcurses library was further improved when Zeyd Ben-Halim took over the development effort in late 1991.[9][10][11] The new library was released as ncurses in November 1993, with version 1.8.1 as the first major release. Subsequent work, through version 1.8.8 (M1995), was driven by Eric S. Raymond, who added the form and menu libraries written by Juergen Pfeifer.[12] Since 1996, it has been maintained by Thomas E. Dickey.[10]
Most ncurses calls can be easily ported to the old curses. System V curses implementations can support BSD curses programs with just a recompilation.[13] However, a few areas are problematic, such as handling terminal resizing, since no counterpart exists in the old curses.
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Terminal database[edit]
Ncurses can use either terminfo (with extensible data) or termcap. Other implementations of curses generally use terminfo; a minority use termcap. Few (mytinfo was an older exception[14]) use both.
License[edit]
Ncurses is a part of the GNU Project. It is one of the few GNU files not distributed under the GNU GPL or LGPL; it is distributed under a permissive free software licence, similar to the MIT License.[15] This is due to the agreement made with the Free Software Foundation at the time the developers assigned their copyright.
When the agreement was made to pass on the rights to the FSF, there was a clause that stated:[15]
The Foundation promises that all distribution of the Package, or of any work 'based on the Package', that takes place under the control of the Foundation or its agents or assignees, shall be on terms that explicitly and perpetually permit anyone possessing a copy of the work to which the terms apply, and possessing accurate notice of these terms, to redistribute copies of the work to anyone on the same terms.
According to the maintainer Thomas E. Dickey, this precludes relicensing to the GPL in any version, since it would place restrictions on the programs that will be able to link to the libraries.[15]
Programs using ncurses[edit]
There are hundreds of programs which use ncurses.[16][17] Some, such as GNU Screen and w3m, use only the termcap interface and perform screen management themselves. Others, such as GNU Midnight Commander and YaST, use the curses programming interface.
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See also[edit]
- conio.h – A C header file used in MS-DOS compilers to create text user interfaces
- SMG$ – The screen-management library available under OpenVMS
References[edit]
- ^'NCURSES — Licensing'. Retrieved July 9, 2013.
- ^Ada95 Binding for ncurses
- ^Curses Programming with Python - Python documentation
- ^gb.ncurses - Gambas Wiki
- ^ncurses Ruby - RubyGems.org
- ^Ncurses functions - PHP Manual
- ^nc plugin: ncurses bindings for SpiderApe
- ^Curses::UI - A curses based OO user interface framework
- ^ abcdEric S. Raymond (September 1995). 'ncurses: Portable Screen-Handling for Linux'. Linux Journal.
- ^ abcThomas E. Dickey (December 1996). 'NCURSES - New Curses'.
- ^The README file in ncurses 1.8.1 states 'v0.1 July 31, 1992' and 'v1.8.1 November 5, 1993', which agrees with the NEWS (changelog) file
- ^NCURSES - Frequently Asked Questions (FAQ): Who wrote NCURSES?
- ^A Hacker's Guide to Ncurses Internals
- ^Sydney S. Weinstein (April 1993). 'On the Networks'. C/C++ Users Journal.
- ^ abcNCURSES - Frequently Asked Questions (FAQ): Is it GPL'd?
- ^'Search results: +ncurses on freshmeat.net'. Archived from the original on February 18, 2012. Retrieved 2013-05-10.
- ^'Projects tagged 'ncurses''. ohloh.
External links[edit]
- Official website