- The scroll routine scrolls the window up one line. This
+ The scroll routine scrolls the window up one line. This
involves moving the lines in the window data structure.
As an optimization, if the scrolling region of the window
is the entire screen, the physical screen may be scrolled
at the same time.
- For positive n, the scrl and wscrl routines scroll the
- window up n lines (line i+n becomes i); otherwise scroll
- the window down n lines. This involves moving the lines
+ For positive n, the scrl and wscrl routines scroll the
+ window up n lines (line i+n becomes i); otherwise scroll
+ the window down n lines. This involves moving the lines
in the window character image structure. The current cur-
sor position is not changed.
For these functions to work, scrolling must be enabled via
- scrollok.
+ scrollok.
RETURN VALUE
- These routines return ERR upon failure, and OK (SVr4 only
- specifies "an integer value other than ERR") upon success-
+ These routines return ERR upon failure, and OK (SVr4 only
+ specifies "an integer value other than ERR") upon success-
ful completion.
NOTES
- Note that scrl and scroll may be macros.
+ Note that scrl and scroll may be macros.
The SVr4 documentation says that the optimization of phys-
ically scrolling immediately if the scroll region is the
entire screen "is" performed, not "may be" performed.
This implementation deliberately does not guarantee that
- this will occur, in order to leave open the possibility of
- smarter optimization of multiple scroll actions on the
- next update.
+ this will occur, to leave open the possibility of smarter
+ optimization of multiple scroll actions on the next
+ update.
Neither the SVr4 nor the XSI documentation specify whether
the current attribute or current color-pair of blanks gen-
@@ -68,7 +106,7 @@