Provided by: ncurses-doc_6.1-1ubuntu1_all bug

NAME

       getcchar,  setcchar  -  Get  a wide character string and rendition from a cchar_t or set a
       cchar_t from a wide-character string

SYNOPSIS

       #include <curses.h>

       int getcchar(
               const cchar_t *wcval,
               wchar_t *wch,
               attr_t *attrs,
               short *color_pair,
               void *opts );

       int setcchar(
               cchar_t *wcval,
               const wchar_t *wch,
               const attr_t attrs,
               short color_pair,
               void *opts );

DESCRIPTION

   getcchar
       The getcchar function gets a wide-character string and rendition from a cchar_t  argument.
       When wch is not a null pointer, the getcchar function does the following:

       ·   Extracts information from a cchar_t value wcval

       ·   Stores the character attributes in the location pointed to by attrs

       ·   Stores the color-pair in the location pointed to by color_pair

       ·   Stores  the  wide-character  string,  characters  referenced  by wcval, into the array
           pointed to by wch.

       When wch is a null pointer, the getcchar function does the following:

       ·   Obtains the number of wide characters pointed to by wcval

       ·   Does not change the data referenced by attrs or color_pair

   setcchar
       The setcchar function initializes the location pointed to by wcval by using:

       ·   The character attributes in attrs

       ·   The color pair in color_pair

       ·   The wide-character string pointed to by wch.  The string  must  be  L'\0'  terminated,
           contain at most one spacing character, which must be the first.

           Up to CCHARW_MAX-1 nonspacing characters may follow.  Additional nonspacing characters
           are ignored.

           The string may  contain  a  single  control  character  instead.   In  that  case,  no
           nonspacing characters are allowed.

EXTENSIONS

       X/Open  Curses documents the opts argument as reserved for future use, saying that it must
       be null.  This implementation uses that parameter in ABI 6 for the functions which have  a
       color-pair parameter to support extended color pairs:

       ·   For   functions   which modify the color, e.g., setcchar, if opts is set it is treated
           as a pointer to int, and used to  set  the  color  pair  instead  of  the  short  pair
           parameter.

       ·   For  functions  which retrieve the color, e.g., getcchar, if opts is set it is treated
           as a pointer to int, and  used  to  retrieve  the color  pair  as  an  int  value,  in
           addition retrieving it via the standard pointer to short parameter.

NOTES

       The  wcval  argument  may be a value generated by a call to setcchar or by a function that
       has a cchar_t output argument.  If wcval is constructed by any other means, the effect  is
       unspecified.

RETURN VALUE

       When  wch  is a null pointer, getcchar returns the number of wide characters referenced by
       wcval, including one for a trailing null.

       When wch is not a null pointer, getcchar returns OK upon successful  completion,  and  ERR
       otherwise.

       Upon successful completion, setcchar returns OK.  Otherwise, it returns ERR.

SEE ALSO

       Functions: attr(3NCURSES), color(3NCURSES), ncurses(3NCURSES), wcwidth(3).

                                                                               getcchar(3NCURSES)