Show wchar_t with ncurses

I am currently working on a C ++ project in which I need to display some wide characters (wchar_t).

The main problem is that even though it works fine in C (using wprintf

), it doesn't work in C ++ using mvwaddwstr

or waddwstr

. Of course I have set the language like this: setlocale(LC_ALL, "");

and nothing is displayed.

Has anyone had this problem before or has an idea about it?

Thank.

Here is the code:

  struct charMap { int x; int y; wchar_t value };
  int                   i, x, y;
  wchar_t               str[2];
  struct charMap _charMap[2] = {
    {0,0,9474}
    {29, 29, 9474}
  };
  initscr();
  setlocale(LC_ALL, "");
  for (y = 0 ; y < 30 /* length */ + 2 ; y++) {
    for (x = 0 ; x < 30 /* width */ + 2; x++) {
      for (i = 0 ; i < 2 ; i++) {
        if ((x == _charMap[i].x || _charMap[i].x == -1) &&
            (y == _charMap[i].y || _charMap[i].y == -1)) {
          str[0] = _charMap[i].value;
          str[1] = L'\0';
          mvwaddwstr(stdscr, y, x, str);
          break;
        }
      }
    }
  }
  refresh();
  while(1);

      

_charMap is a structured table containing useful values ​​for easy comparison (avoiding heavy structure if ... else if ... else

). _charMap[].value

is wchar_t

, and _charMap[].x

is int, like _charMap[].y

.

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1 answer


You need setlocale(LC_ALL, "")

to do beforeinitscr()

.

Working example:



#include <ncursesw/ncurses.h>
#include <locale.h>
#include <wchar.h>

int main() {  
    setlocale(LC_ALL, "");
    initscr();
    wchar_t wstr[] = { 9474, L'\0' };
    mvaddwstr(0, 0, wstr);
    refresh();
    getch();
    endwin();
    return 0;
}

      

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