colors This was not supported in the BSD version.ĪT&T curses development appears to have halted in the mid-1990s when X/Open Curses was defined. line-drawing The BSD version gave little support here. Video highlighting (bold, underline) The BSD version supported only standout. In addition to the termcap/terminfo improvement, other improvements were made in the AT&T version: Due to licensing restrictions on the latter, the BSD and AT&T versions of the library were developed independently. A few years later, Mary Ann Horton, who had maintained the vi and termcap sources at Berkeley, went to AT&T Corporation and made a different version using terminfo, which became part of UNIX System III and UNIX System V. Īccording to Goodheart, Ken Arnold's original implementation of curses started by reusing functions from the termcap library, and adding to that. HOW TO INSTALL NCURSES LIBRARY IN WINDOWS CODEIn fact the code in curses that optimizes moving the cursor from one place on the screen to another was borrowed from vi, which predated curses. Sometimes it is incorrectly stated that curses was used by the vi editor. The name "curses" is a pun on cursor optimization. Some improvements were made to the BSD library in the 1990s as "4.4BSD" curses, e.g., to provide more than one type of video highlighting. The first curses library was written by Ken Arnold and originally released with BSD UNIX, where it was used for several games, most notably Rogue. For an application that does not require bit-mapped graphics or multiple fonts, an interface implementation using curses will usually be much simpler and faster than one using an X toolkit. Curses has the advantage of back-portability to character-cell terminals and simplicity. Most implementations use terminfo some use termcap. HOW TO INSTALL NCURSES LIBRARY IN WINDOWS DRIVERSThere are a few implementations, such as PDCurses, which use specialized device drivers rather than a terminal database. Most implementations of curses use a database that can describe the capabilities of thousands of different terminals. The curses API is described in several places. In short, this means that the programmer simply creates a character matrix of how the screen should look and lets curses handle the work. HOW TO INSTALL NCURSES LIBRARY IN WINDOWS UPDATEThe library determines a minimal set of changes that are needed to update the display and then executes these using the terminal's specific capabilities and control sequences. The programmer sets up the desired appearance of each window, then tells the curses package to update the screen. Each window is represented by a character matrix. It provides an abstraction of one or more windows that maps onto the terminal screen. The curses library on the executing system sends the correct control characters based on the terminal type. Using curses, programmers are able to write text-based applications without writing directly for any specific terminal type.
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