https://invisible-island.net/ncurses/man/
curs_addwstr(3x) Library calls curs_addwstr(3x)
addwstr, waddwstr, mvaddwstr, mvwaddwstr, addnwstr, waddnwstr,
mvaddnwstr, mvwaddnwstr - add a wide-character string to a curses
window and advance the cursor
#include <curses.h>
int addwstr(const wchar_t * wstr);
int waddwstr(WINDOW * win, const wchar_t * wstr);
int mvaddwstr(int y, int x, const wchar_t * wstr);
int mvwaddwstr(WINDOW * win, int y, int x,
const wchar_t * wstr);
int addnwstr(const wchar_t * wstr, int n);
int waddnwstr(WINDOW * win, const wchar_t * wstr, int n);
int mvaddnwstr(int y, int x, const wchar_t * wstr, int n);
int mvwaddnwstr(WINDOW * win, int y, int x,
const wchar_t * wstr, int n);
waddwstr writes the characters of the (wide-null-terminated) wide-
character string wstr to the window win, as if by constructing a
cchar_t for each wchar_t in wstr, then calling wadd_wch(3x) with the
resulting cchar_t. curses processes spacing and non-spacing characters
in wstr one at a time. waddnwstr is similar, but writes at most n wide
characters. If n is -1, waddnwstr writes the entire wide string.
ncurses(3x) describes the variants of these functions.
These functions return OK on success and ERR on failure.
In ncurses, they return ERR if
o win is NULL,
o wstr is NULL, or
o an internal wadd_wch(3x) call returns ERR.
Functions prefixed with "mv" first perform cursor movement and fail if
the position (y, x) is outside the window boundaries.
All of these functions except waddnwstr may be implemented as macros.
X/Open Curses Issue 4 describes these functions.
SVr4 describes a successful return value only as "an integer value
other than ERR".
These functions were initially specified by X/Open Curses Issue 4
(1995). The System V Interface Definition Version 4 of the same year
specified functions named waddwstr and waddnwstr (and the usual
variants). These were later additions to SVr4.x, not appearing in the
first SVr4 (1989).
curs_addstr(3x) describes comparable functions of the ncurses library
in its non-wide-character configuration.
curses(3x), curs_add_wch(3x), curs_add_wchstr(3x)
ncurses 6.5 2025-01-18 curs_addwstr(3x)