has_il.3cur

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 3CUR 代码 · 共 39 行

.TH has_il 3cur 
.SH Name
has_il \- determine whether insert/delete line is available
.SH Syntax
.B
#include <cursesX.h>
.PP
.B
bool has_il(\|)
.SH Description
.NXR "has_il subroutine"
.NXA "has_il subroutine" "deleteln subroutine"
.NXA "has_il subroutine" "insertln macro"
This function will return the value
.PN TRUE
if the terminal has insert- and delete-line capabilities, or 
if it can
simulate them using scrolling regions.
This function
might be used to check if it would be appropriate to turn on
physical scrolling using 
the
.PN scrollok 
routine.
.PP
The routines
.PN insertln 
and
.PN deleteln 
are always available in the
.PN curses
library if the terminal does not have the required facilities.
.SH Return Values
This function returns TRUE if the terminal has insert line and delete line
capabilities, or can simulate them using scrolling regions, otherwise it
returns FALSE.
.SH See Also
deleteln(3cur), insertln(3cur), scrollok(3cur)