# curs_deleteln 3x 2024-04-20 ncurses 6.5 Library calls

    curs_deleteln(3x)                Library calls               curs_deleteln(3x)

## NAME

           deleteln,  wdeleteln, insdelln, winsdelln, insertln, winsertln - delete
           or insert lines in a curses window

## SYNOPSIS

           #include <curses.h>

           int deleteln(void);
           int wdeleteln(WINDOW *win);

           int insdelln(int n);
           int winsdelln(WINDOW *win, int n);

           int insertln(void);
           int winsertln(WINDOW *win);

## DESCRIPTION

           The deleteln and wdeleteln routines delete the line under the cursor in
           the  window;  all  lines  below the current line are moved up one line.
           The bottom line of the window is cleared.  The cursor position does not
           change.

           The  insdelln  and  winsdelln  routines, for positive n, insert n lines
           into the specified window above the current line.  The n  bottom  lines
           are  lost.  For negative n, delete n lines (starting with the one under
           the cursor), and move the remaining lines up.  The bottom n  lines  are
           cleared.  The current cursor position remains the same.

           The  insertln  and  winsertln  routines  insert  a blank line above the
           current line and the bottom line is lost.

## RETURN VALUE

           These routines return the integer ERR upon  failure  and  an  OK  (SVr4
           specifies  only  "an  integer  value  other  than ERR") upon successful
           completion.

           X/Open defines no error conditions.  In  this  implementation,  if  the
           window parameter is null, an error is returned.

## NOTES

           Note that all but winsdelln may be macros.

           These  routines do not require a hardware line delete or insert feature
           in  the  terminal.   In  fact,  they  will  not   use   hardware   line
           delete/insert  unless  idlok(...,  TRUE)  has  been  set on the current
           window.

## PORTABILITY

           These functions are described in X/Open Curses, Issue 4.  The  standard
           specifies  that  they  return  ERR  on  failure, but specifies no error
           conditions.

## SEE ALSO

           curses(3x)

    ncurses 6.5                       2024-04-20                 curs_deleteln(3x)