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deleteln, wdeleteln, insdelln, winsdelln, insertln, winsertln - delete and insert lines in
a curses window
int wdeleteln(WINDOW *win);
int insdelln(int n);
int winsdelln(WINDOW *win, int n);
int winsertln(WINDOW *win);
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 bot-
tom 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.
All routines return the integer ERR upon failure and an OK (SVr4 specifies only "an inte-
ger value other than ERR") upon successful completion.
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.
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 won't use hardware line delete/insert unless idlok(..., TRUE) has been set
on the current window.
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