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RedHat 9 (Linux i386) - man page for scrl (redhat section 3X)

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curs_scroll(3X) 								  curs_scroll(3X)

       scroll, scrl, wscrl - scroll a curses window

       #include <curses.h>

       int scroll(WINDOW *win);
       int scrl(int n);
       int wscrl(WINDOW *win, int n);

       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 in the  win-
       dow character image structure.  The current cursor position is not changed.

       For these functions to work, scrolling must be enabled via scrollok.

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

       Note that scrl and scroll may be macros.

       The SVr4 documentation says that the optimization of physically 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,  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 cur-
       rent color-pair of blanks generated by the scroll function is zeroed.  Under  this  imple-
       mentation it is.

       The XSI Curses standard, Issue 4 describes these functions.

       curses(3X), curs_outopts(3X)

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