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1445 cejka 1
/*
2071 jermar 2
 * Copyright (c) 2006 Josef Cejka
1445 cejka 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
1649 cejka 28
 
1740 jermar 29
/** @addtogroup console
1649 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
2618 jermar 35
#include <libc.h>
1451 cejka 36
#include <fb.h>
1445 cejka 37
#include <ipc/ipc.h>
1694 palkovsky 38
#include <keys.h>
1451 cejka 39
#include <ipc/fb.h>
1445 cejka 40
#include <ipc/services.h>
41
#include <errno.h>
1451 cejka 42
#include <key_buffer.h>
43
#include <console.h>
1453 palkovsky 44
#include <unistd.h>
45
#include <async.h>
1481 cejka 46
#include <libadt/fifo.h>
1487 cejka 47
#include <screenbuffer.h>
1867 jermar 48
#include <sys/mman.h>
3084 decky 49
#include <stdio.h>
1445 cejka 50
 
1522 palkovsky 51
#include "gcons.h"
52
 
1481 cejka 53
#define MAX_KEYREQUESTS_BUFFERED 32
1451 cejka 54
 
3084 decky 55
#define NAME "console"
1445 cejka 56
 
1526 cejka 57
/** Index of currently used virtual console.
58
 */
1512 cejka 59
int active_console = 0;
1453 palkovsky 60
 
1526 cejka 61
/** Information about framebuffer
62
 */
1487 cejka 63
struct {
64
    int phone;      /**< Framebuffer phone */
1506 cejka 65
    ipcarg_t rows;      /**< Framebuffer rows */
66
    ipcarg_t cols;      /**< Framebuffer columns */
1487 cejka 67
} fb_info;
68
 
1451 cejka 69
typedef struct {
1526 cejka 70
    keybuffer_t keybuffer;      /**< Buffer for incoming keys. */
2025 jermar 71
    /** Buffer for unsatisfied request for keys. */
72
    FIFO_CREATE_STATIC(keyrequests, ipc_callid_t,
73
        MAX_KEYREQUESTS_BUFFERED); 
1526 cejka 74
    int keyrequest_counter;     /**< Number of requests in buffer. */
75
    int client_phone;       /**< Phone to connected client. */
2025 jermar 76
    int used;           /**< 1 if this virtual console is
77
                     * connected to some client.*/
78
    screenbuffer_t screenbuffer;    /**< Screenbuffer for saving screen
79
                     * contents and related settings. */
1451 cejka 80
} connection_t;
81
 
2025 jermar 82
static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual
83
                         * consoles */
84
static keyfield_t *interbuffer = NULL;      /**< Pointer to memory shared
85
                         * with framebufer used for
86
                         * faster virtual console
2069 jermar 87
                         * switching */
1506 cejka 88
 
89
 
1526 cejka 90
/** Find unused virtual console.
91
 *
92
 */
1574 palkovsky 93
static int find_free_connection(void)
1451 cejka 94
{
2069 jermar 95
    int i;
1451 cejka 96
 
2069 jermar 97
    for (i = 0; i < CONSOLE_COUNT; i++) {
1574 palkovsky 98
        if (!connections[i].used)
1451 cejka 99
            return i;
100
    }
1574 palkovsky 101
    return -1;
1451 cejka 102
}
103
 
1552 palkovsky 104
static void clrscr(void)
105
{
2621 jermar 106
    async_msg_0(fb_info.phone, FB_CLEAR);
1552 palkovsky 107
}
108
 
3745 rimsky 109
static void curs_visibility(bool visible)
1552 palkovsky 110
{
3745 rimsky 111
    async_msg_1(fb_info.phone, FB_CURSOR_VISIBILITY, visible);
1552 palkovsky 112
}
113
 
3745 rimsky 114
static void curs_hide_sync(void)
115
{
116
    ipc_call_sync_1_0(fb_info.phone, FB_CURSOR_VISIBILITY, false);
117
}
118
 
1552 palkovsky 119
static void curs_goto(int row, int col)
120
{
1610 palkovsky 121
    async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
1552 palkovsky 122
}
123
 
124
static void set_style(style_t *style)
125
{
2025 jermar 126
    async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color,
2539 jermar 127
        style->bg_color);
1552 palkovsky 128
}
129
 
130
static void set_style_col(int fgcolor, int bgcolor)
131
{
1610 palkovsky 132
    async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
1552 palkovsky 133
}
134
 
135
static void prtchr(char c, int row, int col)
136
{
1610 palkovsky 137
    async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
1552 palkovsky 138
}
139
 
1497 cejka 140
/** Check key and process special keys.
141
 *
2566 jermar 142
 *
143
 */
1497 cejka 144
static void write_char(int console, char key)
145
{
146
    screenbuffer_t *scr = &(connections[console].screenbuffer);
147
 
148
    switch (key) {
2025 jermar 149
    case '\n':
2069 jermar 150
        scr->position_y++;
151
        scr->position_x = 0;
2025 jermar 152
        break;
153
    case '\r':
154
        break;
155
    case '\t':
156
        scr->position_x += 8;
157
        scr->position_x -= scr->position_x % 8;
158
        break;
159
    case '\b':
160
        if (scr->position_x == 0)
1497 cejka 161
            break;
2025 jermar 162
        scr->position_x--;
163
        if (console == active_console)
164
            prtchr(' ', scr->position_y, scr->position_x);
165
        screenbuffer_putchar(scr, ' ');
166
        break;
167
    default:   
168
        if (console == active_console)
169
            prtchr(key, scr->position_y, scr->position_x);
1497 cejka 170
 
2025 jermar 171
        screenbuffer_putchar(scr, key);
172
        scr->position_x++;
1497 cejka 173
    }
174
 
175
    scr->position_y += (scr->position_x >= scr->size_x);
176
 
177
    if (scr->position_y >= scr->size_y) {
178
        scr->position_y = scr->size_y - 1;
1674 palkovsky 179
        screenbuffer_clear_line(scr, scr->top_line);
2069 jermar 180
        scr->top_line = (scr->top_line + 1) % scr->size_y;
1518 palkovsky 181
        if (console == active_console)
2621 jermar 182
            async_msg_1(fb_info.phone, FB_SCROLL, 1);
1497 cejka 183
    }
184
 
185
    scr->position_x = scr->position_x % scr->size_x;
186
 
1552 palkovsky 187
    if (console == active_console)
188
        curs_goto(scr->position_y, scr->position_x);
1504 cejka 189
 
1497 cejka 190
}
191
 
1552 palkovsky 192
/** Switch to new console */
193
static void change_console(int newcons)
194
{
195
    connection_t *conn;
1673 palkovsky 196
    int i, j, rc;
1578 cejka 197
    keyfield_t *field;
198
    style_t *style;
3742 rimsky 199
 
1552 palkovsky 200
    if (newcons == active_console)
201
        return;
3742 rimsky 202
 
1555 palkovsky 203
    if (newcons == KERNEL_CONSOLE) {
3742 rimsky 204
        async_serialize_start();
3745 rimsky 205
        curs_hide_sync();
3742 rimsky 206
        gcons_in_kernel();
207
        async_serialize_end();
208
 
209
        if (__SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE))
210
            active_console = KERNEL_CONSOLE;
211
        else
3745 rimsky 212
            newcons = active_console;
3742 rimsky 213
    }
214
 
215
    if (newcons != KERNEL_CONSOLE) {
216
        async_serialize_start();
217
 
1555 palkovsky 218
        if (active_console == KERNEL_CONSOLE)
3742 rimsky 219
            gcons_redraw_console();
220
 
221
        active_console = newcons;
222
        gcons_change_console(newcons);
223
        conn = &connections[active_console];
224
 
225
        set_style(&conn->screenbuffer.style);
3745 rimsky 226
        curs_visibility(false);
3742 rimsky 227
        if (interbuffer) {
228
            for (i = 0; i < conn->screenbuffer.size_x; i++)
229
                for (j = 0; j < conn->screenbuffer.size_y; j++) {
230
                    unsigned int size_x;
231
 
232
                    size_x = conn->screenbuffer.size_x;
233
                    interbuffer[i + j * size_x] =
234
                        *get_field_at(&conn->screenbuffer, i, j);
235
                }
236
            /* This call can preempt, but we are already at the end */
237
            rc = async_req_0_0(fb_info.phone, FB_DRAW_TEXT_DATA);      
238
        }
239
 
240
        if ((!interbuffer) || (rc != 0)) {
241
            set_style(&conn->screenbuffer.style);
1552 palkovsky 242
            clrscr();
3742 rimsky 243
            style = &conn->screenbuffer.style;
244
 
245
            for (j = 0; j < conn->screenbuffer.size_y; j++)
246
                for (i = 0; i < conn->screenbuffer.size_x; i++) {
247
                    field = get_field_at(&conn->screenbuffer, i, j);
248
                    if (!style_same(*style, field->style))
249
                        set_style(&field->style);
250
                    style = &field->style;
251
                    if ((field->character == ' ') &&
252
                        (style_same(field->style,
253
                        conn->screenbuffer.style)))
254
                        continue;
255
 
256
                    prtchr(field->character, j, i);
257
                }
1552 palkovsky 258
        }
3742 rimsky 259
 
260
        curs_goto(conn->screenbuffer.position_y,
261
            conn->screenbuffer.position_x);
262
        curs_visibility(conn->screenbuffer.is_cursor_visible);
263
 
1717 palkovsky 264
        async_serialize_end();
1552 palkovsky 265
    }
266
}
267
 
1526 cejka 268
/** Handler for keyboard */
1453 palkovsky 269
static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
1445 cejka 270
{
1453 palkovsky 271
    ipc_callid_t callid;
1445 cejka 272
    ipc_call_t call;
1453 palkovsky 273
    int retval;
1560 vana 274
    int c;
1489 palkovsky 275
    connection_t *conn;
1717 palkovsky 276
    int newcon;
1506 cejka 277
 
1453 palkovsky 278
    /* Ignore parameters, the connection is alread opened */
279
    while (1) {
280
        callid = async_get_call(&call);
281
        switch (IPC_GET_METHOD(call)) {
282
        case IPC_M_PHONE_HUNGUP:
283
            /* TODO: Handle hangup */
284
            return;
1717 palkovsky 285
        case KBD_MS_LEFT:
286
            newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
287
            if (newcon != -1)
288
                change_console(newcon);
1721 palkovsky 289
            retval = 0;
1717 palkovsky 290
            break;
1707 palkovsky 291
        case KBD_MS_MOVE:
2025 jermar 292
            gcons_mouse_move(IPC_GET_ARG1(call),
2539 jermar 293
                IPC_GET_ARG2(call));
1721 palkovsky 294
            retval = 0;
1707 palkovsky 295
            break;
1453 palkovsky 296
        case KBD_PUSHCHAR:
297
            /* got key from keyboard driver */
298
            retval = 0;
1520 cejka 299
            c = IPC_GET_ARG1(call);
1453 palkovsky 300
            /* switch to another virtual console */
1481 cejka 301
 
1489 palkovsky 302
            conn = &connections[active_console];
2025 jermar 303
/*
304
 *          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 +
305
 *              CONSOLE_COUNT)) {
306
 */
1560 vana 307
            if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
308
                if (c == 0x112)
1555 palkovsky 309
                    change_console(KERNEL_CONSOLE);
1552 palkovsky 310
                else
1560 vana 311
                    change_console(c - 0x101);
1453 palkovsky 312
                break;
313
            }
1481 cejka 314
 
315
            /* if client is awaiting key, send it */
1489 palkovsky 316
            if (conn->keyrequest_counter > 0) {    
317
                conn->keyrequest_counter--;
2619 jermar 318
                ipc_answer_1(fifo_pop(conn->keyrequests), EOK,
319
                    c);
1481 cejka 320
                break;
321
            }
322
 
1489 palkovsky 323
            keybuffer_push(&conn->keybuffer, c);
1721 palkovsky 324
            retval = 0;
1476 cejka 325
 
1453 palkovsky 326
            break;
327
        default:
1459 palkovsky 328
            retval = ENOENT;
1610 palkovsky 329
        }
2619 jermar 330
        ipc_answer_0(callid, retval);
1453 palkovsky 331
    }
332
}
333
 
334
/** Default thread for new connections */
1518 palkovsky 335
static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
1453 palkovsky 336
{
1445 cejka 337
    ipc_callid_t callid;
1453 palkovsky 338
    ipc_call_t call;
339
    int consnum;
1521 cejka 340
    ipcarg_t arg1, arg2;
1592 palkovsky 341
    connection_t *conn;
1453 palkovsky 342
 
1574 palkovsky 343
    if ((consnum = find_free_connection()) == -1) {
2619 jermar 344
        ipc_answer_0(iid, ELIMIT);
1453 palkovsky 345
        return;
346
    }
1592 palkovsky 347
    conn = &connections[consnum];
1610 palkovsky 348
    conn->used = 1;
1555 palkovsky 349
 
1610 palkovsky 350
    async_serialize_start();
1555 palkovsky 351
    gcons_notify_connect(consnum);
2637 cejka 352
    conn->client_phone = IPC_GET_ARG5(*icall);
1592 palkovsky 353
    screenbuffer_clear(&conn->screenbuffer);
1497 cejka 354
 
1453 palkovsky 355
    /* Accept the connection */
2619 jermar 356
    ipc_answer_0(iid, EOK);
1610 palkovsky 357
 
1453 palkovsky 358
    while (1) {
1610 palkovsky 359
        async_serialize_end();
1453 palkovsky 360
        callid = async_get_call(&call);
1610 palkovsky 361
        async_serialize_start();
362
 
2566 jermar 363
        arg1 = 0;
364
        arg2 = 0;
1453 palkovsky 365
        switch (IPC_GET_METHOD(call)) {
366
        case IPC_M_PHONE_HUNGUP:
1592 palkovsky 367
            gcons_notify_disconnect(consnum);
1610 palkovsky 368
 
1592 palkovsky 369
            /* Answer all pending requests */
370
            while (conn->keyrequest_counter > 0) {     
371
                conn->keyrequest_counter--;
2619 jermar 372
                ipc_answer_0(fifo_pop(conn->keyrequests),
373
                    ENOENT);
1592 palkovsky 374
                break;
375
            }
1616 palkovsky 376
            conn->used = 0;
1453 palkovsky 377
            return;
378
        case CONSOLE_PUTCHAR:
1497 cejka 379
            write_char(consnum, IPC_GET_ARG1(call));
1528 palkovsky 380
            gcons_notify_char(consnum);
1453 palkovsky 381
            break;
1476 cejka 382
        case CONSOLE_CLEAR:
1487 cejka 383
            /* Send message to fb */
384
            if (consnum == active_console) {
2621 jermar 385
                async_msg_0(fb_info.phone, FB_CLEAR);
1487 cejka 386
            }
387
 
1592 palkovsky 388
            screenbuffer_clear(&conn->screenbuffer);
1487 cejka 389
 
1476 cejka 390
            break;
391
        case CONSOLE_GOTO:
2025 jermar 392
            screenbuffer_goto(&conn->screenbuffer,
2539 jermar 393
                IPC_GET_ARG2(call), IPC_GET_ARG1(call));
1567 palkovsky 394
            if (consnum == active_console)
2025 jermar 395
                curs_goto(IPC_GET_ARG1(call),
2539 jermar 396
                    IPC_GET_ARG2(call));
1476 cejka 397
            break;
1521 cejka 398
        case CONSOLE_GETSIZE:
1528 palkovsky 399
            arg1 = fb_info.rows;
400
            arg2 = fb_info.cols;
1521 cejka 401
            break;
1523 cejka 402
        case CONSOLE_FLUSH:
1723 palkovsky 403
            if (consnum == active_console)
2621 jermar 404
                async_req_0_0(fb_info.phone, FB_FLUSH);
1523 cejka 405
            break;
1525 cejka 406
        case CONSOLE_SET_STYLE:
407
            arg1 = IPC_GET_ARG1(call);
408
            arg2 = IPC_GET_ARG2(call);
2539 jermar 409
            screenbuffer_set_style(&conn->screenbuffer, arg1,
410
                arg2);
1525 cejka 411
            if (consnum == active_console)
1552 palkovsky 412
                set_style_col(arg1, arg2);
1525 cejka 413
            break;
1575 cejka 414
        case CONSOLE_CURSOR_VISIBILITY:
415
            arg1 = IPC_GET_ARG1(call);
1592 palkovsky 416
            conn->screenbuffer.is_cursor_visible = arg1;
1575 cejka 417
            if (consnum == active_console)
418
                curs_visibility(arg1);
419
            break;
1453 palkovsky 420
        case CONSOLE_GETCHAR:
1592 palkovsky 421
            if (keybuffer_empty(&conn->keybuffer)) {
1481 cejka 422
                /* buffer is empty -> store request */
2025 jermar 423
                if (conn->keyrequest_counter <
424
                    MAX_KEYREQUESTS_BUFFERED) {
1592 palkovsky 425
                    fifo_push(conn->keyrequests, callid);
426
                    conn->keyrequest_counter++;
1481 cejka 427
                } else {
2025 jermar 428
                    /*
429
                     * No key available and too many
430
                     * requests => fail.
431
                    */
2619 jermar 432
                    ipc_answer_0(callid, ELIMIT);
1481 cejka 433
                }
434
                continue;
2025 jermar 435
            }
3602 rimsky 436
            int ch;
437
            keybuffer_pop(&conn->keybuffer, &ch);
438
            arg1 = ch;
1453 palkovsky 439
            break;
440
        }
2619 jermar 441
        ipc_answer_2(callid, EOK, arg1, arg2);
1453 palkovsky 442
    }
443
}
444
 
445
int main(int argc, char *argv[])
446
{
3084 decky 447
    printf(NAME ": HelenOS Console service\n");
448
 
1453 palkovsky 449
    ipcarg_t phonehash;
1721 palkovsky 450
    int kbd_phone;
1451 cejka 451
    int i;
1490 palkovsky 452
 
453
    async_set_client_connection(client_connection);
1445 cejka 454
 
455
    /* Connect to keyboard driver */
456
 
2635 cejka 457
    kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
2069 jermar 458
    while (kbd_phone < 0) {
1453 palkovsky 459
        usleep(10000);
2635 cejka 460
        kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
2025 jermar 461
    }
1445 cejka 462
 
2637 cejka 463
    if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
1445 cejka 464
        return -1;
1689 palkovsky 465
    async_new_connection(phonehash, 0, NULL, keyboard_events);
466
 
1445 cejka 467
    /* Connect to framebuffer driver */
2635 cejka 468
    fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
2069 jermar 469
    while (fb_info.phone < 0) {
1487 cejka 470
        usleep(10000);
2635 cejka 471
        fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
1487 cejka 472
    }
1552 palkovsky 473
 
1522 palkovsky 474
    /* Initialize gcons */
475
    gcons_init(fb_info.phone);
476
    /* Synchronize, the gcons can have something in queue */
2621 jermar 477
    async_req_0_0(fb_info.phone, FB_FLUSH);
1487 cejka 478
 
2621 jermar 479
    async_req_0_2(fb_info.phone, FB_GET_CSIZE, &fb_info.rows,
2539 jermar 480
        &fb_info.cols);
1552 palkovsky 481
    set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
482
    clrscr();
1487 cejka 483
 
484
    /* Init virtual consoles */
1451 cejka 485
    for (i = 0; i < CONSOLE_COUNT; i++) {
486
        connections[i].used = 0;
2539 jermar 487
        keybuffer_init(&connections[i].keybuffer);
1481 cejka 488
 
2539 jermar 489
        connections[i].keyrequests.head = 0;
490
        connections[i].keyrequests.tail = 0;
1481 cejka 491
        connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
492
        connections[i].keyrequest_counter = 0;
1487 cejka 493
 
2539 jermar 494
        if (screenbuffer_init(&connections[i].screenbuffer,
495
            fb_info.cols, fb_info.rows) == NULL) {
2069 jermar 496
            /* FIXME: handle error */
1487 cejka 497
            return -1;
498
        }
1451 cejka 499
    }
1574 palkovsky 500
    connections[KERNEL_CONSOLE].used = 1;
1445 cejka 501
 
2069 jermar 502
    interbuffer = mmap(NULL,
2539 jermar 503
        sizeof(keyfield_t) * fb_info.cols * fb_info.rows,
504
        PROTO_READ | PROTO_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
2069 jermar 505
    if (!interbuffer) {
2678 jermar 506
        if (ipc_share_out_start(fb_info.phone, interbuffer,
2677 jermar 507
            AS_AREA_READ) != EOK) {
2539 jermar 508
            munmap(interbuffer,
509
                sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
1512 cejka 510
            interbuffer = NULL;
511
        }
512
    }
1520 cejka 513
 
2069 jermar 514
    curs_goto(0, 0);
2539 jermar 515
    curs_visibility(
516
        connections[active_console].screenbuffer.is_cursor_visible);
1497 cejka 517
 
1518 palkovsky 518
    /* Register at NS */
3084 decky 519
    if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
1445 cejka 520
        return -1;
521
 
3084 decky 522
    // FIXME: avoid connectiong to itself, keep using klog
523
    // printf(NAME ": Accepting connections\n");
1453 palkovsky 524
    async_manager();
1451 cejka 525
 
1445 cejka 526
    return 0;  
527
}
1649 cejka 528
 
529
/** @}
530
 */