COLORS, COLOR_PAIRS, COLS, ESCDELAY, LINES, TABSIZE, curscr, newscr, stdscr - curses global variables
#include <curses.h> int COLOR_PAIRS; int COLORS; int COLS; int ESCDELAY; int LINES; int TABSIZE; WINDOW * curscr; WINDOW * newscr; WINDOW * stdscr;
This page summarizes variables provided by the curses li- brary. A more complete description is given in the curs- es(3x) manual page. Depending on the configuration, these may be actual vari- ables, or macros (see curs_threads(3x)) which provide read-only access to curses's state. In either case, ap- plications should treat them as read-only to avoid confus- ing the library. COLOR_PAIRS After initializing curses, this variable contains the num- ber of color pairs which the terminal can support. Usual- ly the number of color pairs will be the product COL- ORS*COLORS, however this is not always true: o a few terminals use HLS colors, which do not follow this rule o terminals supporting a large number of colors are lim- ited by the number of color pairs that can be repre- sented in a signed short value. COLORS After initializing curses, this variable contains the num- ber of colors which the terminal can support. COLS After initializing curses, this variable contains the width of the screen, i.e., the number of columns. ESCDELAY This variable holds the number of milliseconds to wait af- ter reading an escape character, to distinguish between an individual escape character entered on the keyboard from escape sequences sent by cursor- and function-keys (see curses(3x). LINES After initializing curses, this variable contains the height of the screen, i.e., the number of lines. TABSIZE This variable holds the number of columns used by the curses library when converting a tab character to spaces as it adds the tab to a window (see curs_addch(3x). The Current Screen This implementation of curses uses a special window curscr to record its updates to the terminal screen. The New Screen This implementation of curses uses a special window newscr to hold updates to the terminal screen before applying them to curscr. The Standard Screen Upon initializing curses, a default window called stdscr, which is the size of the terminal screen, is created. Many curses functions use this window.
The curses library is initialized using either initscr(3x), or newterm(3x). If curses is configured to use separate curses/terminfo libraries, most of these variables reside in the curses library.
ESCDELAY and TABSIZE are extensions, not provided in most other implementations of curses.
curses(3x), curs_threads(3x), term_variables(3x), termin- fo(3x), terminfo(5). curs_variables(3x)