具有ncurses的C99 UTF8字符 [英] C99 UTF8 characters with ncurses

问题描述

我正在玩 ncurses ，遇到了问题.我想用Unicode块字符(U + 2588，█)绘制一个简单的框，但是我无法使其正确显示:

如您所见，我想要的字符显示为〜H .

我遵循了

我的PC语言环境是 en_US.UTF-8 ，我正在使用无吸式终端，它当然是

这是一个非常简单的程序，我不确定这里出了什么问题.有什么建议吗?

解决方案

手册页提供了 mvaddch 函数使用 chtype ，与 wchar_t 不同.

与 mvaddch 对应的curses函数是 mvadd_wch ，它使用第三种类型( cchar_t ).

您可以使用a similar question to a tee. Minimal working example:

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

int main() {
    setlocale(LC_ALL, ""); // must be caled before initscr
    WINDOW *win = initscr();

    int w, h;
    getmaxyx(win, h, w);
    
    // should fill the left half of the 
    // terminal window with filled block characters
    int i, j;
    for (i = 0; i < h; i++) {
        for (j = 0; j < w/2; j++) {
            mvaddch(x, y, L'\u2588');
        }
    }

    refresh(); // show changes
    getch();   // wait for user input
    endwin();  // kill window
    
    return 1;
}

Compiled with:

gcc main.c -o main -std=c99 -lncurses

My PC locale is en_US.UTF-8 and I'm using the suckless terminal which is of course perfectly capable of dislaying utf8:

It's a very simple program and I'm not sure what is going wrong here. Any suggestions?

解决方案

The manual page gives a short overview of data-types which are used for function parameters.

In the example, L'\u2588' is a wide character, which would be stored in a wchar_t type.

• The mvaddch function uses a chtype, which is not the same as wchar_t.
• The curses function which corresponds to mvaddch is mvadd_wch, which uses a third type (cchar_t).
• You could either convert that wide character to a cchar_t using setcchar, or
• You could store the value in an array of wchar_t and pass that to mvaddwstr.

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