curs_add_wchstr(3x) — Linux manual page

curs_add_wchstr(3X)                                  curs_add_wchstr(3X)

NAME

       add_wchstr, add_wchnstr, wadd_wchstr, wadd_wchnstr, mvadd_wchstr,
       mvadd_wchnstr, mvwadd_wchstr, mvwadd_wchnstr - add an array of
       complex characters (and attributes) to a curses window

SYNOPSIS

       #include <curses.h>

       int add_wchstr(const cchar_t *wchstr);
       int add_wchnstr(const cchar_t *wchstr, int n);
       int wadd_wchstr(WINDOW * win, const cchar_t *wchstr);
       int wadd_wchnstr(WINDOW * win, const cchar_t *wchstr, int n);

       int mvadd_wchstr(int y, int x, const cchar_t *wchstr);
       int mvadd_wchnstr(int y, int x, const cchar_t *wchstr, int n);
       int mvwadd_wchstr(WINDOW *win, int y, int x, const cchar_t *wchstr);
       int mvwadd_wchnstr(WINDOW *win, int y, int x, const cchar_t *wchstr, int n);

DESCRIPTION

       These functions copy the (null-terminated) array of complex char‐
       acters  wchstr  into  the  window image structure starting at the
       current cursor position.  The four functions with n as  the  last
       argument  copy  at  most n elements, but no more than will fit on
       the line.  If n=-1 then the whole array is copied, to the maximum
       number of characters that will fit on the line.

       The window cursor is not advanced.  These functions  work  faster
       than waddnstr.  On the other hand:

       •   they do not perform checking (such as for the newline, back‐
           space, or carriage return characters),

       •   they do not advance the current cursor position,

       •   they do not expand other control characters to ^-escapes, and

       •   they truncate the string if it crosses the right margin,
           rather than wrapping it around to the new line.

       These functions end successfully on encountering a null cchar_t,
       or when they have filled the current line.  If a complex charac‐
       ter cannot completely fit at the end of the current line, the re‐
       maining columns are filled with the background character and ren‐
       dition.

RETURN VALUE

       All functions return the integer ERR upon failure and OK on suc‐
       cess.

       X/Open does not define any error conditions.  This implementation
       returns an error if the window pointer is null.

       Functions with a “mv” prefix first perform a cursor movement us‐
       ing wmove, and return an error if the position is outside the
       window, or if the window pointer is null.

NOTES

       All functions except wadd_wchnstr may be macros.

PORTABILITY

       These entry points are described in the XSI Curses standard, Is‐
       sue 4.

SEE ALSO

       curses(3X), curs_addwstr(3X).

       Comparable functions in the narrow-character (ncurses) library
       are described in curs_addchstr(3X).

COLOPHON

       This page is part of the ncurses (new curses) project.  Informa‐
       tion about the project can be found at 
       ⟨https://www.gnu.org/software/ncurses/ncurses.html⟩.  If you have
       a bug report for this manual page, send it to
       bug-ncurses-request@gnu.org.  This page was obtained from the
       project's upstream Git mirror of the CVS repository
       ⟨https://github.com/mirror/ncurses.git⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-03-12.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
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                                                     curs_add_wchstr(3X)