aboutsummaryrefslogtreecommitdiff
path: root/ui/curses.c
blob: de962faa7cd682d855d459583b1612c6a594382d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
/*
 * QEMU curses/ncurses display driver
 * 
 * Copyright (c) 2005 Andrzej Zaborowski  <balrog@zabor.org>
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "qemu/osdep.h"

#ifndef _WIN32
#include <sys/ioctl.h>
#include <termios.h>
#endif
#include <locale.h>
#include <wchar.h>
#include <iconv.h>

#include "qapi/error.h"
#include "qemu/module.h"
#include "ui/console.h"
#include "ui/input.h"
#include "sysemu/sysemu.h"

#if defined(__APPLE__) || defined(__OpenBSD__)
#define _XOPEN_SOURCE_EXTENDED 1
#endif

/* KEY_EVENT is defined in wincon.h and in curses.h. Avoid redefinition. */
#undef KEY_EVENT
#include <curses.h>
#undef KEY_EVENT

#define FONT_HEIGHT 16
#define FONT_WIDTH 8

enum maybe_keycode {
    CURSES_KEYCODE,
    CURSES_CHAR,
    CURSES_CHAR_OR_KEYCODE,
};

static DisplayChangeListener *dcl;
static console_ch_t *screen;
static WINDOW *screenpad = NULL;
static int width, height, gwidth, gheight, invalidate;
static int px, py, sminx, sminy, smaxx, smaxy;

static const char *font_charset = "CP437";
static cchar_t *vga_to_curses;

static void curses_update(DisplayChangeListener *dcl,
                          int x, int y, int w, int h)
{
    console_ch_t *line;
    g_autofree cchar_t *curses_line = g_new(cchar_t, width);
    wchar_t wch[CCHARW_MAX];
    attr_t attrs;
    short colors;
    int ret;

    line = screen + y * width;
    for (h += y; y < h; y ++, line += width) {
        for (x = 0; x < width; x++) {
            chtype ch = line[x] & A_CHARTEXT;
            chtype at = line[x] & A_ATTRIBUTES;
            short color_pair = PAIR_NUMBER(line[x]);

            ret = getcchar(&vga_to_curses[ch], wch, &attrs, &colors, NULL);
            if (ret == ERR || wch[0] == 0) {
                wch[0] = ch;
                wch[1] = 0;
            }
            setcchar(&curses_line[x], wch, at, color_pair, NULL);
        }
        mvwadd_wchnstr(screenpad, y, 0, curses_line, width);
    }

    pnoutrefresh(screenpad, py, px, sminy, sminx, smaxy - 1, smaxx - 1);
    refresh();
}

static void curses_calc_pad(void)
{
    if (qemu_console_is_fixedsize(NULL)) {
        width = gwidth;
        height = gheight;
    } else {
        width = COLS;
        height = LINES;
    }

    if (screenpad)
        delwin(screenpad);

    clear();
    refresh();

    screenpad = newpad(height, width);

    if (width > COLS) {
        px = (width - COLS) / 2;
        sminx = 0;
        smaxx = COLS;
    } else {
        px = 0;
        sminx = (COLS - width) / 2;
        smaxx = sminx + width;
    }

    if (height > LINES) {
        py = (height - LINES) / 2;
        sminy = 0;
        smaxy = LINES;
    } else {
        py = 0;
        sminy = (LINES - height) / 2;
        smaxy = sminy + height;
    }
}

static void curses_resize(DisplayChangeListener *dcl,
                          int width, int height)
{
    if (width == gwidth && height == gheight) {
        return;
    }

    gwidth = width;
    gheight = height;

    curses_calc_pad();
}

#if !defined(_WIN32) && defined(SIGWINCH) && defined(KEY_RESIZE)
static volatile sig_atomic_t got_sigwinch;
static void curses_winch_check(void)
{
    struct winsize {
        unsigned short ws_row;
        unsigned short ws_col;
        unsigned short ws_xpixel;   /* unused */
        unsigned short ws_ypixel;   /* unused */
    } ws;

    if (!got_sigwinch) {
        return;
    }
    got_sigwinch = false;

    if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
        return;
    }

    resize_term(ws.ws_row, ws.ws_col);
    invalidate = 1;
}

static void curses_winch_handler(int signum)
{
    got_sigwinch = true;
}

static void curses_winch_init(void)
{
    struct sigaction old, winch = {
        .sa_handler  = curses_winch_handler,
    };
    sigaction(SIGWINCH, &winch, &old);
}
#else
static void curses_winch_check(void) {}
static void curses_winch_init(void) {}
#endif

static void curses_cursor_position(DisplayChangeListener *dcl,
                                   int x, int y)
{
    if (x >= 0) {
        x = sminx + x - px;
        y = sminy + y - py;

        if (x >= 0 && y >= 0 && x < COLS && y < LINES) {
            move(y, x);
            curs_set(1);
            /* it seems that curs_set(1) must always be called before
             * curs_set(2) for the latter to have effect */
            if (!qemu_console_is_graphic(NULL)) {
                curs_set(2);
            }
            return;
        }
    }

    curs_set(0);
}

/* generic keyboard conversion */

#include "curses_keys.h"

static kbd_layout_t *kbd_layout = NULL;

static wint_t console_getch(enum maybe_keycode *maybe_keycode)
{
    wint_t ret;
    switch (get_wch(&ret)) {
    case KEY_CODE_YES:
        *maybe_keycode = CURSES_KEYCODE;
        break;
    case OK:
        *maybe_keycode = CURSES_CHAR;
        break;
    case ERR:
        ret = -1;
        break;
    default:
        abort();
    }
    return ret;
}

static int curses2foo(const int _curses2foo[], const int _curseskey2foo[],
                      int chr, enum maybe_keycode maybe_keycode)
{
    int ret = -1;
    if (maybe_keycode == CURSES_CHAR) {
        if (chr < CURSES_CHARS) {
            ret = _curses2foo[chr];
        }
    } else {
        if (chr < CURSES_KEYS) {
            ret = _curseskey2foo[chr];
        }
        if (ret == -1 && maybe_keycode == CURSES_CHAR_OR_KEYCODE &&
            chr < CURSES_CHARS) {
            ret = _curses2foo[chr];
        }
    }
    return ret;
}

#define curses2keycode(chr, maybe_keycode) \
    curses2foo(_curses2keycode, _curseskey2keycode, chr, maybe_keycode)
#define curses2keysym(chr, maybe_keycode) \
    curses2foo(_curses2keysym, _curseskey2keysym, chr, maybe_keycode)
#define curses2qemu(chr, maybe_keycode) \
    curses2foo(_curses2qemu, _curseskey2qemu, chr, maybe_keycode)

static void curses_refresh(DisplayChangeListener *dcl)
{
    int chr, keysym, keycode, keycode_alt;
    enum maybe_keycode maybe_keycode = CURSES_KEYCODE;

    curses_winch_check();

    if (invalidate) {
        clear();
        refresh();
        curses_calc_pad();
        graphic_hw_invalidate(NULL);
        invalidate = 0;
    }

    graphic_hw_text_update(NULL, screen);

    while (1) {
        /* while there are any pending key strokes to process */
        chr = console_getch(&maybe_keycode);

        if (chr == -1)
            break;

#ifdef KEY_RESIZE
        /* this shouldn't occur when we use a custom SIGWINCH handler */
        if (maybe_keycode != CURSES_CHAR && chr == KEY_RESIZE) {
            clear();
            refresh();
            curses_calc_pad();
            curses_update(dcl, 0, 0, width, height);
            continue;
        }
#endif

        keycode = curses2keycode(chr, maybe_keycode);
        keycode_alt = 0;

        /* alt or esc key */
        if (keycode == 1) {
            enum maybe_keycode next_maybe_keycode = CURSES_KEYCODE;
            int nextchr = console_getch(&next_maybe_keycode);

            if (nextchr != -1) {
                chr = nextchr;
                maybe_keycode = next_maybe_keycode;
                keycode_alt = ALT;
                keycode = curses2keycode(chr, maybe_keycode);

                if (keycode != -1) {
                    keycode |= ALT;

                    /* process keys reserved for qemu */
                    if (keycode >= QEMU_KEY_CONSOLE0 &&
                            keycode < QEMU_KEY_CONSOLE0 + 9) {
                        erase();
                        wnoutrefresh(stdscr);
                        console_select(keycode - QEMU_KEY_CONSOLE0);

                        invalidate = 1;
                        continue;
                    }
                }
            }
        }

        if (kbd_layout) {
            keysym = curses2keysym(chr, maybe_keycode);

            if (keysym == -1) {
                if (chr < ' ') {
                    keysym = chr + '@';
                    if (keysym >= 'A' && keysym <= 'Z')
                        keysym += 'a' - 'A';
                    keysym |= KEYSYM_CNTRL;
                } else
                    keysym = chr;
            }

            keycode = keysym2scancode(kbd_layout, keysym & KEYSYM_MASK,
                                      NULL, false);
            if (keycode == 0)
                continue;

            keycode |= (keysym & ~KEYSYM_MASK) >> 16;
            keycode |= keycode_alt;
        }

        if (keycode == -1)
            continue;

        if (qemu_console_is_graphic(NULL)) {
            /* since terminals don't know about key press and release
             * events, we need to emit both for each key received */
            if (keycode & SHIFT) {
                qemu_input_event_send_key_number(NULL, SHIFT_CODE, true);
                qemu_input_event_send_key_delay(0);
            }
            if (keycode & CNTRL) {
                qemu_input_event_send_key_number(NULL, CNTRL_CODE, true);
                qemu_input_event_send_key_delay(0);
            }
            if (keycode & ALT) {
                qemu_input_event_send_key_number(NULL, ALT_CODE, true);
                qemu_input_event_send_key_delay(0);
            }
            if (keycode & ALTGR) {
                qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, true);
                qemu_input_event_send_key_delay(0);
            }

            qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, true);
            qemu_input_event_send_key_delay(0);
            qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, false);
            qemu_input_event_send_key_delay(0);

            if (keycode & ALTGR) {
                qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, false);
                qemu_input_event_send_key_delay(0);
            }
            if (keycode & ALT) {
                qemu_input_event_send_key_number(NULL, ALT_CODE, false);
                qemu_input_event_send_key_delay(0);
            }
            if (keycode & CNTRL) {
                qemu_input_event_send_key_number(NULL, CNTRL_CODE, false);
                qemu_input_event_send_key_delay(0);
            }
            if (keycode & SHIFT) {
                qemu_input_event_send_key_number(NULL, SHIFT_CODE, false);
                qemu_input_event_send_key_delay(0);
            }
        } else {
            keysym = curses2qemu(chr, maybe_keycode);
            if (keysym == -1)
                keysym = chr;

            kbd_put_keysym(keysym);
        }
    }
}

static void curses_atexit(void)
{
    endwin();
    g_free(vga_to_curses);
    g_free(screen);
}

/*
 * In the following:
 * - fch is the font glyph number
 * - uch is the unicode value
 * - wch is the wchar_t value (may not be unicode, e.g. on BSD/solaris)
 * - mbch is the native local-dependent multibyte representation
 */

/* Setup wchar glyph for one UCS-2 char */
static void convert_ucs(unsigned char fch, uint16_t uch, iconv_t conv)
{
    char mbch[MB_LEN_MAX];
    wchar_t wch[2];
    char *puch, *pmbch;
    size_t such, smbch;
    mbstate_t ps;

    puch = (char *) &uch;
    pmbch = (char *) mbch;
    such = sizeof(uch);
    smbch = sizeof(mbch);

    if (iconv(conv, &puch, &such, &pmbch, &smbch) == (size_t) -1) {
        fprintf(stderr, "Could not convert 0x%04x "
                        "from UCS-2 to a multibyte character: %s\n",
                        uch, strerror(errno));
        return;
    }

    memset(&ps, 0, sizeof(ps));
    if (mbrtowc(&wch[0], mbch, sizeof(mbch) - smbch, &ps) == -1) {
        fprintf(stderr, "Could not convert 0x%04x "
                        "from a multibyte character to wchar_t: %s\n",
                        uch, strerror(errno));
        return;
    }

    wch[1] = 0;
    setcchar(&vga_to_curses[fch], wch, 0, 0, NULL);
}

/* Setup wchar glyph for one font character */
static void convert_font(unsigned char fch, iconv_t conv)
{
    char mbch[MB_LEN_MAX];
    wchar_t wch[2];
    char *pfch, *pmbch;
    size_t sfch, smbch;
    mbstate_t ps;

    pfch = (char *) &fch;
    pmbch = (char *) &mbch;
    sfch = sizeof(fch);
    smbch = sizeof(mbch);

    if (iconv(conv, &pfch, &sfch, &pmbch, &smbch) == (size_t) -1) {
        fprintf(stderr, "Could not convert font glyph 0x%02x "
                        "from %s to a multibyte character: %s\n",
                        fch, font_charset, strerror(errno));
        return;
    }

    memset(&ps, 0, sizeof(ps));
    if (mbrtowc(&wch[0], mbch, sizeof(mbch) - smbch, &ps) == -1) {
        fprintf(stderr, "Could not convert font glyph 0x%02x "
                        "from a multibyte character to wchar_t: %s\n",
                        fch, strerror(errno));
        return;
    }

    wch[1] = 0;
    setcchar(&vga_to_curses[fch], wch, 0, 0, NULL);
}

/* Convert one wchar to UCS-2 */
static uint16_t get_ucs(wchar_t wch, iconv_t conv)
{
    char mbch[MB_LEN_MAX];
    uint16_t uch;
    char *pmbch, *puch;
    size_t smbch, such;
    mbstate_t ps;
    int ret;

    memset(&ps, 0, sizeof(ps));
    ret = wcrtomb(mbch, wch, &ps);
    if (ret == -1) {
        fprintf(stderr, "Could not convert 0x%04lx "
                        "from wchar_t to a multibyte character: %s\n",
                        (unsigned long)wch, strerror(errno));
        return 0xFFFD;
    }

    pmbch = (char *) mbch;
    puch = (char *) &uch;
    smbch = ret;
    such = sizeof(uch);

    if (iconv(conv, &pmbch, &smbch, &puch, &such) == (size_t) -1) {
        fprintf(stderr, "Could not convert 0x%04lx "
                        "from a multibyte character to UCS-2 : %s\n",
                        (unsigned long)wch, strerror(errno));
        return 0xFFFD;
    }

    return uch;
}

/*
 * Setup mapping for vga to curses line graphics.
 */
static void font_setup(void)
{
    iconv_t ucs2_to_nativecharset;
    iconv_t nativecharset_to_ucs2;
    iconv_t font_conv;
    int i;
    g_autofree gchar *local_codeset = g_get_codeset();

    /*
     * Control characters are normally non-printable, but VGA does have
     * well-known glyphs for them.
     */
    static const uint16_t control_characters[0x20] = {
      0x0020,
      0x263a,
      0x263b,
      0x2665,
      0x2666,
      0x2663,
      0x2660,
      0x2022,
      0x25d8,
      0x25cb,
      0x25d9,
      0x2642,
      0x2640,
      0x266a,
      0x266b,
      0x263c,
      0x25ba,
      0x25c4,
      0x2195,
      0x203c,
      0x00b6,
      0x00a7,
      0x25ac,
      0x21a8,
      0x2191,
      0x2193,
      0x2192,
      0x2190,
      0x221f,
      0x2194,
      0x25b2,
      0x25bc
    };

    ucs2_to_nativecharset = iconv_open(local_codeset, "UCS-2");
    if (ucs2_to_nativecharset == (iconv_t) -1) {
        fprintf(stderr, "Could not convert font glyphs from UCS-2: '%s'\n",
                        strerror(errno));
        exit(1);
    }

    nativecharset_to_ucs2 = iconv_open("UCS-2", local_codeset);
    if (nativecharset_to_ucs2 == (iconv_t) -1) {
        iconv_close(ucs2_to_nativecharset);
        fprintf(stderr, "Could not convert font glyphs to UCS-2: '%s'\n",
                        strerror(errno));
        exit(1);
    }

    font_conv = iconv_open(local_codeset, font_charset);
    if (font_conv == (iconv_t) -1) {
        iconv_close(ucs2_to_nativecharset);
        iconv_close(nativecharset_to_ucs2);
        fprintf(stderr, "Could not convert font glyphs from %s: '%s'\n",
                        font_charset, strerror(errno));
        exit(1);
    }

    /* Control characters */
    for (i = 0; i <= 0x1F; i++) {
        convert_ucs(i, control_characters[i], ucs2_to_nativecharset);
    }

    for (i = 0x20; i <= 0xFF; i++) {
        convert_font(i, font_conv);
    }

    /* DEL */
    convert_ucs(0x7F, 0x2302, ucs2_to_nativecharset);

    if (strcmp(local_codeset, "UTF-8")) {
        /* Non-Unicode capable, use termcap equivalents for those available */
        for (i = 0; i <= 0xFF; i++) {
            wchar_t wch[CCHARW_MAX];
            attr_t attr;
            short color;
            int ret;

            ret = getcchar(&vga_to_curses[i], wch, &attr, &color, NULL);
            if (ret == ERR)
                continue;

            switch (get_ucs(wch[0], nativecharset_to_ucs2)) {
            case 0x00a3:
                vga_to_curses[i] = *WACS_STERLING;
                break;
            case 0x2591:
                vga_to_curses[i] = *WACS_BOARD;
                break;
            case 0x2592:
                vga_to_curses[i] = *WACS_CKBOARD;
                break;
            case 0x2502:
                vga_to_curses[i] = *WACS_VLINE;
                break;
            case 0x2524:
                vga_to_curses[i] = *WACS_RTEE;
                break;
            case 0x2510:
                vga_to_curses[i] = *WACS_URCORNER;
                break;
            case 0x2514:
                vga_to_curses[i] = *WACS_LLCORNER;
                break;
            case 0x2534:
                vga_to_curses[i] = *WACS_BTEE;
                break;
            case 0x252c:
                vga_to_curses[i] = *WACS_TTEE;
                break;
            case 0x251c:
                vga_to_curses[i] = *WACS_LTEE;
                break;
            case 0x2500:
                vga_to_curses[i] = *WACS_HLINE;
                break;
            case 0x253c:
                vga_to_curses[i] = *WACS_PLUS;
                break;
            case 0x256c:
                vga_to_curses[i] = *WACS_LANTERN;
                break;
            case 0x256a:
                vga_to_curses[i] = *WACS_NEQUAL;
                break;
            case 0x2518:
                vga_to_curses[i] = *WACS_LRCORNER;
                break;
            case 0x250c:
                vga_to_curses[i] = *WACS_ULCORNER;
                break;
            case 0x2588:
                vga_to_curses[i] = *WACS_BLOCK;
                break;
            case 0x03c0:
                vga_to_curses[i] = *WACS_PI;
                break;
            case 0x00b1:
                vga_to_curses[i] = *WACS_PLMINUS;
                break;
            case 0x2265:
                vga_to_curses[i] = *WACS_GEQUAL;
                break;
            case 0x2264:
                vga_to_curses[i] = *WACS_LEQUAL;
                break;
            case 0x00b0:
                vga_to_curses[i] = *WACS_DEGREE;
                break;
            case 0x25a0:
                vga_to_curses[i] = *WACS_BULLET;
                break;
            case 0x2666:
                vga_to_curses[i] = *WACS_DIAMOND;
                break;
            case 0x2192:
                vga_to_curses[i] = *WACS_RARROW;
                break;
            case 0x2190:
                vga_to_curses[i] = *WACS_LARROW;
                break;
            case 0x2191:
                vga_to_curses[i] = *WACS_UARROW;
                break;
            case 0x2193:
                vga_to_curses[i] = *WACS_DARROW;
                break;
            case 0x23ba:
                vga_to_curses[i] = *WACS_S1;
                break;
            case 0x23bb:
                vga_to_curses[i] = *WACS_S3;
                break;
            case 0x23bc:
                vga_to_curses[i] = *WACS_S7;
                break;
            case 0x23bd:
                vga_to_curses[i] = *WACS_S9;
                break;
            }
        }
    }
    iconv_close(ucs2_to_nativecharset);
    iconv_close(nativecharset_to_ucs2);
    iconv_close(font_conv);
}

static void curses_setup(void)
{
    int i, colour_default[8] = {
        [QEMU_COLOR_BLACK]   = COLOR_BLACK,
        [QEMU_COLOR_BLUE]    = COLOR_BLUE,
        [QEMU_COLOR_GREEN]   = COLOR_GREEN,
        [QEMU_COLOR_CYAN]    = COLOR_CYAN,
        [QEMU_COLOR_RED]     = COLOR_RED,
        [QEMU_COLOR_MAGENTA] = COLOR_MAGENTA,
        [QEMU_COLOR_YELLOW]  = COLOR_YELLOW,
        [QEMU_COLOR_WHITE]   = COLOR_WHITE,
    };

    /* input as raw as possible, let everything be interpreted
     * by the guest system */
    initscr(); noecho(); intrflush(stdscr, FALSE);
    nodelay(stdscr, TRUE); nonl(); keypad(stdscr, TRUE);
    start_color(); raw(); scrollok(stdscr, FALSE);
    set_escdelay(25);

    /* Make color pair to match color format (3bits bg:3bits fg) */
    for (i = 0; i < 64; i++) {
        init_pair(i, colour_default[i & 7], colour_default[i >> 3]);
    }
    /* Set default color for more than 64 for safety. */
    for (i = 64; i < COLOR_PAIRS; i++) {
        init_pair(i, COLOR_WHITE, COLOR_BLACK);
    }

    font_setup();
}

static void curses_keyboard_setup(void)
{
#if defined(__APPLE__)
    /* always use generic keymaps */
    if (!keyboard_layout)
        keyboard_layout = "en-us";
#endif
    if(keyboard_layout) {
        kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout,
                                          &error_fatal);
    }
}

static const DisplayChangeListenerOps dcl_ops = {
    .dpy_name        = "curses",
    .dpy_text_update = curses_update,
    .dpy_text_resize = curses_resize,
    .dpy_refresh     = curses_refresh,
    .dpy_text_cursor = curses_cursor_position,
};

static void curses_display_init(DisplayState *ds, DisplayOptions *opts)
{
#ifndef _WIN32
    if (!isatty(1)) {
        fprintf(stderr, "We need a terminal output\n");
        exit(1);
    }
#endif

    setlocale(LC_CTYPE, "");
    if (opts->u.curses.charset) {
        font_charset = opts->u.curses.charset;
    }
    screen = g_new0(console_ch_t, 160 * 100);
    vga_to_curses = g_new0(cchar_t, 256);
    curses_setup();
    curses_keyboard_setup();
    atexit(curses_atexit);

    curses_winch_init();

    dcl = g_new0(DisplayChangeListener, 1);
    dcl->ops = &dcl_ops;
    register_displaychangelistener(dcl);

    invalidate = 1;
}

static QemuDisplay qemu_display_curses = {
    .type       = DISPLAY_TYPE_CURSES,
    .init       = curses_display_init,
};

static void register_curses(void)
{
    qemu_display_register(&qemu_display_curses);
}

type_init(register_curses);