curs_clear(3X)                                     curs_clear(3X)

NAME
       erase,  werase,  clear,  wclear, clrtobot, wclrtobot, clr-
       toeol, wclrtoeol - clear all or part of a curses window

SYNOPSIS
       # include <curses.h>

       int erase(void);
       int werase(WINDOW *win);
       int clear(void);
       int wclear(WINDOW *win);
       int clrtobot(void);
       int wclrtobot(WINDOW *win);
       int clrtoeol(void);
       int wclrtoeol(WINDOW *win);

DESCRIPTION
       The erase and werase routines copy blanks to  every  posi-
       tion in the window, clearing the screen.

       The  clear  and wclear routines are like erase and werase,
       but they also call clearok, so that the screen is  cleared
       completely  on  the  next call to wrefresh for that window
       and repainted from scratch.

       The clrtobot and wclrtobot routines erase from the  cursor
       to the end of screen.  That is, they erase all lines below
       the cursor in the window.  Also, the current line  to  the
       right of the cursor, inclusive, is erased.

       The clrtoeol and wclrtoeol routines erase the current line
       to the right of the cursor, inclusive, to the end  of  the
       current line.

       Blanks created by erasure have the current background ren-
       dition (as set by wbkgdset) merged into them.

RETURN VALUE
       All routines return the integer  OK.   The  SVr4.0  manual
       says  "or  a  non-negative integer if immedok is set", but
       this appears to be an error.

NOTES
       Note that erase, werase, clear, wclear, clrtobot, and clr-
       toeol may be macros.

PORTABILITY
       These  functions are described in the XSI Curses standard,
       Issue 4.  The standard specifies that they return  ERR  on
       failure, but specifies no error conditions.

       Some  historic  curses  implementations had, as an undocu-
       mented feature,  the  ability  to  do  the  equivalent  of
       clearok(...,  1)  by saying touchwin(stdscr) or clear(std-
       scr).  This will not work under ncurses.

SEE ALSO
       curses(3X), curs_outopts(3X), curs_refresh(3X)

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