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           wattr_get, attr_off, wattr_off, attr_on, wattr_on, attr_set, wattr_set,
           chgat, wchgat, mvchgat, mvwchgat, PAIR_NUMBER - curses character and
           window attribute control routines


           #include <curses.h>
           int attroff(int attrs);
           int wattroff(WINDOW *win, int attrs);
           int attron(int attrs);
           int wattron(WINDOW *win, int attrs);
           int attrset(int attrs);
           int wattrset(WINDOW *win, int attrs);
           int color_set(short color_pair_number, void* opts);
           int wcolor_set(WINDOW *win, short color_pair_number,
                 void* opts);
           int standend(void);
           int wstandend(WINDOW *win);
           int standout(void);
           int wstandout(WINDOW *win);
           int attr_get(attr_t *attrs, short *pair, void *opts);
           int wattr_get(WINDOW *win, attr_t *attrs, short *pair,
                  void *opts);
           int attr_off(attr_t attrs, void *opts);
           int wattr_off(WINDOW *win, attr_t attrs, void *opts);
           int attr_on(attr_t attrs, void *opts);
           int wattr_on(WINDOW *win, attr_t attrs, void *opts);
           int attr_set(attr_t attrs, short pair, void *opts);
           int wattr_set(WINDOW *win, attr_t attrs, short pair, void *opts);
           int chgat(int n, attr_t attr, short color,
                 const void *opts)
           int wchgat(WINDOW *win, int n, attr_t attr,
                 short color, const void *opts)
           int mvchgat(int y, int x, int n, attr_t attr,
                 short color, const void *opts)
           int mvwchgat(WINDOW *win, int y, int x, int n,
                 attr_t attr, short color, const void *opts)


           These  routines  manipulate the current attributes of the named window.
           The current attributes of a window apply to  all  characters  that  are
           written  into  the window with waddch, waddstr and wprintw.  Attributes
           are a property of the character, and move with  the  character  through
           any  scrolling and insert/delete line/character operations.  To the ex-
           tent possible, they are displayed as appropriate modifications  to  the
           graphic rendition of characters put on the screen.
           The  routine attrset sets the current attributes of the given window to
           attrs.  The routine attroff turns  off  the  named  attributes  without
           turning  any  other  attributes on or off.  The routine attron turns on
           the named attributes without affecting any others.  The routine  stand-
           out  is  the  same  as attron(A_STANDOUT).  The routine standend is the
           same as attrset(A_NORMAL) or attrset(0), that is, it turns off all  at-
           corresponding  attr* functions, except that they take arguments of type
           attr_t rather than int.
           The routine chgat changes the attributes of a given number  of  charac-
           ters  starting  at  the current cursor location of stdscr.  It does not
           update the cursor and does not perform wrapping.  A character count  of
           -1  or  greater  than  the  remaining  window width means to change at-
           tributes all the way to the end of the current line.  The wchgat  func-
           tion  generalizes this to any window; the mvwchgat function does a cur-
           sor move before acting.  In these functions, the color  argument  is  a
           color-pair  index  (as  in  the  first  argument of init_pair, see col-
           or(3NCURSES)).  The opts argument is not presently  used,  but  is  re-
           served for the future (leave it NULL).
           The following video attributes, defined in <curses.h>, can be passed to
           the routines attron, attroff, and attrset, or OR'd with the  characters
           passed to addch.
                   A_NORMAL        Normal display (no highlight)
                   A_STANDOUT      Best highlighting mode of the terminal.
                   A_UNDERLINE     Underlining
                   A_REVERSE       Reverse video
                   A_BLINK         Blinking
                   A_DIM           Half bright
                   A_BOLD          Extra bright or bold
                   A_PROTECT       Protected mode
                   A_INVIS         Invisible or blank mode
                   A_ALTCHARSET    Alternate character set
                   A_CHARTEXT      Bit-mask to extract a character
                   COLOR_PAIR(n)   Color-pair number n
           The following macro is the reverse of COLOR_PAIR(n):
           PAIR_NUMBER(attrs) Returns the pair number associated
                              with the COLOR_PAIR(n) attribute.
           The  return  values  of many of these routines are not meaningful (they
           are implemented as macro-expanded assignments and simply  return  their
           argument).   The  SVr4 manual page claims (falsely) that these routines
           always return 1.


           Note  that  attroff,  wattroff,  attron,  wattron,  attrset,  wattrset,
           standend and standout may be macros.
           COLOR_PAIR  values  can only be OR'd with attributes if the pair number
           is less than 256.  The alternate functions such as color_set can pass a
           color pair value directly.  However, ncurses ABI 4 and 5 simply OR this
           value within the alternate functions.  You must use ncurses  ABI  6  to
           support more than 256 color pairs.
           XSI Curses added the new entry points, attr_get, attr_on, attr_off, at-
           tr_set, wattr_on, wattr_off, wattr_get, wattr_set.  These are  intended
           to work with a new series of highlight macros prefixed with WA_.
           Older  versions  of  this library did not force an update of the screen
           when changing the attributes.  Use touchwin  to  force  the  screen  to
           match the updated attributes.
                   WA_NORMAL       Normal display (no highlight)
                   WA_STANDOUT     Best highlighting mode of the terminal.
                   WA_UNDERLINE    Underlining
                   WA_REVERSE      Reverse video
                   WA_BLINK        Blinking
                   WA_DIM          Half bright
                   WA_BOLD         Extra bright or bold
                   WA_ALTCHARSET   Alternate character set
           The  XSI  curses  standard specifies that each pair of corresponding A_
           and WA_-using functions operates on the same current-highlight informa-
           The XSI standard extended conformance level adds new highlights A_HORI-
           ZONTAL, A_LEFT, A_LOW, A_RIGHT, A_TOP,  A_VERTICAL  (and  corresponding
           WA_ macros for each) which this implementation does not yet support.


           All routines return the integer OK on success, or ERR on failure.
           X/Open does not define any error conditions.
           This  implementation  returns  an  error if the window pointer is null.
           The wcolor_set function returns an error if the color pair parameter is
           outside  the range 0..COLOR_PAIRS-1.  This implementation also provides
           getattrs for compatibility with older versions of curses.
           Functions with a "mv" prefix first  perform  a  cursor  movement  using
           wmove, and return an error if the position is outside the window, or if
           the window pointer is null.


           ncurses(3NCURSES), addch(3NCURSES),  addstr(3NCURSES),  bkgd(3NCURSES),
           printw(3NCURSES), curses_variables(3NCURSES)

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