Re: something wrong with wchar_t printing?

[Thomas Dickey]

On Tue, May 01, 2018 at 06:19:39PM +0200, folkert wrote:
> Hi,
> 
> I wrote a question on stackoverflow regarding printing of std::wstring
> using ncurses
> (https://stackoverflow.com/questions/50118848/utf-8-stdwstring-ncurses ).
> I'm starting to believe the problem is in waddwstr.
> 
> If I have a utf-8 string in "temp", then convert that to std::wstring
> using
>       std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
>       std::wstring wstr = converter.from_bytes(temp);
> then
>       waddwstr(win, wstr.c_str());
> prints a space for CERTAIN special characters. An U+00E4 prints fine but an
> U+1F5E0 prints as a space.
> If I print them in utf-8 format using wprintw, they come out allright.


offhand, this seems to be what you're testing (but a trace shows
me the same UTF-8 for the addwstr):

#include <ncurses.h>
#include <locale.h>

int
main(void)
{
    static wchar_t case1[2] = {0x1f5e0, 0};
    static char case2[] = "\360\237\227\240\0";
    setlocale(LC_ALL, "");
    initscr();
    cbreak();
    noecho();
    addwstr(case1);
    printw("%s", case2);
    getch();
    endwin();
    return 0;
}

-- 
Thomas E. Dickey <address@hidden>
https://invisible-island.net
ftp://ftp.invisible-island.net

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