Sprinkle about some cycle wasting checks for the win pointer being
null. Unfortunately, ncurses does this and there is some sloppy code
out there that relies on the check resulting in segfaults in
NetBSD curses which then, of course, gets blamed for the error.

branches: 1.14.12;
Rework previous fix for getch cursor position when cursor is moved
without refresh. If the window is not dirty but the window cursor
position does not match curscr then move the cursor. This fixes
the issues seen in PR lib/54263.

Back out incorrect fix for PR 53617 and fix it in a different way.
Keep track of the cursor location, if getch is called without a refresh
and without pending updates (dirty windows) then move the cursor to the
correct location directly. Doing this prevents unnecessary refreshes.

When we remove default color from attributes, just clear all __COLOR.
It's both a nono-optmization and matches the test used in counterpart
code that adds default color when none is set.

branches: 1.11.12; 1.11.14;
KNF.
Normalise coding style.
White space police.
Sprinkle some extra braces to make the flow more clear.

No functional changes.

branches: 1.10.28;
Return the same information whether or not we have wide characters.
Problem pointed out by Rhialto on current-users.

Prepare curses for the possibility of changing from termcap to terminfo.
term.h #defines lines, pad_char and no_color_video macros which conflict
with existing curses code. We change lines to alines and nlines depending
on use, pad_char to padchar and no_color_video becomes no_color_attributes
but with a strong alias from no_color_video.

Remove clause 3 and 4 from TNF licenses

branches: 1.7.10;
Merge in wide curses code done as a Summer of Code project by
Ruibiao Qiu.

branches: 1.6.18;
Mini KNF. From Douwe Kiela.

Remove extraneous tabs from blank lines.

* Added rcs id line to files missing it.
* Added code to __restartwin to restore meta and cursor visibility states
* Added code to __stopwin to disable meta.
* Added the *line group of functions for drawing character lines.

Added functions to replace what were previously macros in curses.h
(this is a requirement of SUSv2) - the old macro behaviour can be
restored by defining _CURSES_USE_MACROS.
Changed function prototypes to use ANSI style.
All externally visible functions now have ANSI style declarations.

Made data structures opaque

branches: 1.1.2;
file inch.c was initially added on branch curses-v3.