src/mpdclient.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "mpdclient.h"
  21 #include "filelist.h"
  22 #include "screen_client.h"
  23 #include "config.h"
  24 #include "options.h"
  25 #include "strfsong.h"
  26 #include "utils.h"
  27 #include "gidle.h"
  28
  29 #include <mpd/client.h>
  30
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <time.h>
  34 #include <string.h>
  35
  36 #define BUFSIZE 1024
  37
  38 /* sort by list-format */
  39 gint
  40 compare_filelistentry_format(gconstpointer filelist_entry1,
  41                              gconstpointer filelist_entry2)
  42 {
  43         const struct mpd_entity *e1, *e2;
  44         char key1[BUFSIZE], key2[BUFSIZE];
  45         int n = 0;
  46
  47         e1 = ((const struct filelist_entry *)filelist_entry1)->entity;
  48         e2 = ((const struct filelist_entry *)filelist_entry2)->entity;
  49
  50         if (e1 && e2 &&
  51             mpd_entity_get_type(e1) == MPD_ENTITY_TYPE_SONG &&
  52             mpd_entity_get_type(e2) == MPD_ENTITY_TYPE_SONG) {
  53                 strfsong(key1, BUFSIZE, options.list_format, mpd_entity_get_song(e1));
  54                 strfsong(key2, BUFSIZE, options.list_format, mpd_entity_get_song(e2));
  55                 n = strcmp(key1,key2);
  56         }
  57
  58         return n;
  59 }
  60
  61
  62 /****************************************************************************/
  63 /*** mpdclient functions ****************************************************/
  64 /****************************************************************************/
  65
  66 bool
  67 mpdclient_handle_error(struct mpdclient *c)
  68 {
  69         enum mpd_error error = mpd_connection_get_error(c->connection);
  70
  71         assert(error != MPD_ERROR_SUCCESS);
  72
  73         if (error == MPD_ERROR_SERVER &&
  74             mpd_connection_get_server_error(c->connection) == MPD_SERVER_ERROR_PERMISSION &&
  75             screen_auth(c))
  76                 return true;
  77
  78         mpdclient_ui_error(mpd_connection_get_error_message(c->connection));
  79
  80         if (!mpd_connection_clear_error(c->connection))
  81                 mpdclient_disconnect(c);
  82
  83         return false;
  84 }
  85
  86 static bool
  87 mpdclient_finish_command(struct mpdclient *c)
  88 {
  89         return mpd_response_finish(c->connection)
  90                 ? true : mpdclient_handle_error(c);
  91 }
  92
  93 struct mpdclient *
  94 mpdclient_new(void)
  95 {
  96         struct mpdclient *c;
  97
  98         c = g_new0(struct mpdclient, 1);
  99         playlist_init(&c->playlist);
 100         c->volume = -1;
 101         c->events = 0;
 102
 103         return c;
 104 }
 105
 106 void
 107 mpdclient_free(struct mpdclient *c)
 108 {
 109         mpdclient_disconnect(c);
 110
 111         mpdclient_playlist_free(&c->playlist);
 112
 113         g_free(c);
 114 }
 115
 116 void
 117 mpdclient_disconnect(struct mpdclient *c)
 118 {
 119         if (c->source != NULL) {
 120                 mpd_glib_free(c->source);
 121                 c->source = NULL;
 122                 c->idle = false;
 123         }
 124
 125         if (c->connection)
 126                 mpd_connection_free(c->connection);
 127         c->connection = NULL;
 128
 129         if (c->status)
 130                 mpd_status_free(c->status);
 131         c->status = NULL;
 132
 133         playlist_clear(&c->playlist);
 134
 135         if (c->song)
 136                 c->song = NULL;
 137
 138         /* everything has changed after a disconnect */
 139         c->events |= MPD_IDLE_DATABASE|MPD_IDLE_STORED_PLAYLIST|
 140                 MPD_IDLE_QUEUE|MPD_IDLE_PLAYER|MPD_IDLE_MIXER|MPD_IDLE_OUTPUT|
 141                 MPD_IDLE_OPTIONS|MPD_IDLE_UPDATE;
 142 }
 143
 144 bool
 145 mpdclient_connect(struct mpdclient *c,
 146                   const gchar *host,
 147                   gint port,
 148                   gfloat _timeout,
 149                   const gchar *password)
 150 {
 151         /* close any open connection */
 152         if( c->connection )
 153                 mpdclient_disconnect(c);
 154
 155         /* connect to MPD */
 156         c->connection = mpd_connection_new(host, port, _timeout * 1000);
 157         if (c->connection == NULL)
 158                 g_error("Out of memory");
 159
 160         if (mpd_connection_get_error(c->connection) != MPD_ERROR_SUCCESS) {
 161                 mpdclient_handle_error(c);
 162                 mpdclient_disconnect(c);
 163                 return false;
 164         }
 165
 166         /* send password */
 167         if (password != NULL && !mpd_run_password(c->connection, password)) {
 168                 mpdclient_handle_error(c);
 169                 mpdclient_disconnect(c);
 170                 return false;
 171         }
 172
 173         return true;
 174 }
 175
 176 bool
 177 mpdclient_update(struct mpdclient *c)
 178 {
 179         struct mpd_connection *connection = mpdclient_get_connection(c);
 180         bool retval;
 181
 182         c->volume = -1;
 183
 184         if (connection == NULL)
 185                 return false;
 186
 187         /* always announce these options as long as we don't have
 188            "idle" support */
 189         if (c->source == NULL)
 190                 c->events |= MPD_IDLE_PLAYER|MPD_IDLE_OPTIONS;
 191
 192         /* free the old status */
 193         if (c->status)
 194                 mpd_status_free(c->status);
 195
 196         /* retrieve new status */
 197         c->status = mpd_run_status(connection);
 198         if (c->status == NULL)
 199                 return mpdclient_handle_error(c);
 200
 201         if (c->source == NULL &&
 202             c->update_id != mpd_status_get_update_id(c->status)) {
 203                 c->events |= MPD_IDLE_UPDATE;
 204
 205                 if (c->update_id > 0)
 206                         c->events |= MPD_IDLE_DATABASE;
 207         }
 208
 209         c->update_id = mpd_status_get_update_id(c->status);
 210
 211         if (c->source == NULL &&
 212             c->volume != mpd_status_get_volume(c->status))
 213                 c->events |= MPD_IDLE_MIXER;
 214
 215         c->volume = mpd_status_get_volume(c->status);
 216
 217         /* check if the playlist needs an update */
 218         if (c->playlist.version != mpd_status_get_queue_version(c->status)) {
 219                 if (c->source == NULL)
 220                         c->events |= MPD_IDLE_PLAYLIST;
 221
 222                 if (!playlist_is_empty(&c->playlist))
 223                         retval = mpdclient_playlist_update_changes(c);
 224                 else
 225                         retval = mpdclient_playlist_update(c);
 226         } else
 227                 retval = true;
 228
 229         /* update the current song */
 230         if (!c->song || mpd_status_get_song_id(c->status)) {
 231                 c->song = playlist_get_song(&c->playlist,
 232                                             mpd_status_get_song_pos(c->status));
 233         }
 234
 235         return retval;
 236 }
 237
 238 struct mpd_connection *
 239 mpdclient_get_connection(struct mpdclient *c)
 240 {
 241         if (c->source != NULL && c->idle) {
 242                 c->idle = false;
 243                 mpd_glib_leave(c->source);
 244         }
 245
 246         return c->connection;
 247 }
 248
 249 void
 250 mpdclient_put_connection(struct mpdclient *c)
 251 {
 252         assert(c->source == NULL || c->connection != NULL);
 253
 254         if (c->source != NULL && !c->idle) {
 255                 c->idle = mpd_glib_enter(c->source);
 256         }
 257 }
 258
 259
 260 /****************************************************************************/
 261 /*** MPD Commands  **********************************************************/
 262 /****************************************************************************/
 263
 264 bool
 265 mpdclient_cmd_crop(struct mpdclient *c)
 266 {
 267         struct mpd_connection *connection = mpdclient_get_connection(c);
 268         struct mpd_status *status;
 269         bool playing;
 270         int length, current;
 271
 272         if (connection == NULL)
 273                 return false;
 274
 275         status = mpd_run_status(connection);
 276         if (status == NULL)
 277                 return mpdclient_handle_error(c);
 278
 279         playing = mpd_status_get_state(status) == MPD_STATE_PLAY ||
 280                 mpd_status_get_state(status) == MPD_STATE_PAUSE;
 281         length = mpd_status_get_queue_length(status);
 282         current = mpd_status_get_song_pos(status);
 283
 284         mpd_status_free(status);
 285
 286         if (!playing || length < 2)
 287                 return true;
 288
 289         mpd_command_list_begin(connection, false);
 290
 291         while (--length >= 0)
 292                 if (length != current)
 293                         mpd_send_delete(connection, length);
 294
 295         mpd_command_list_end(connection);
 296
 297         return mpdclient_finish_command(c);
 298 }
 299
 300 bool
 301 mpdclient_cmd_clear(struct mpdclient *c)
 302 {
 303         struct mpd_connection *connection = mpdclient_get_connection(c);
 304         bool retval;
 305
 306         if (connection == NULL)
 307                 return false;
 308
 309         mpd_send_clear(connection);
 310         retval = mpdclient_finish_command(c);
 311
 312         if (retval)
 313                 c->events |= MPD_IDLE_PLAYLIST;
 314
 315         return retval;
 316 }
 317
 318 bool
 319 mpdclient_cmd_volume(struct mpdclient *c, gint value)
 320 {
 321         struct mpd_connection *connection = mpdclient_get_connection(c);
 322         if (connection == NULL)
 323                 return false;
 324
 325         mpd_send_set_volume(connection, value);
 326         return mpdclient_finish_command(c);
 327 }
 328
 329 bool
 330 mpdclient_cmd_volume_up(struct mpdclient *c)
 331 {
 332         struct mpd_connection *connection = mpdclient_get_connection(c);
 333         if (connection == NULL)
 334                 return false;
 335
 336         if (c->status == NULL ||
 337             mpd_status_get_volume(c->status) == -1)
 338                 return true;
 339
 340         if (c->volume < 0)
 341                 c->volume = mpd_status_get_volume(c->status);
 342
 343         if (c->volume >= 100)
 344                 return true;
 345
 346         return mpdclient_cmd_volume(c, ++c->volume);
 347 }
 348
 349 bool
 350 mpdclient_cmd_volume_down(struct mpdclient *c)
 351 {
 352         struct mpd_connection *connection = mpdclient_get_connection(c);
 353         if (connection == NULL)
 354                 return false;
 355
 356         if (c->status == NULL || mpd_status_get_volume(c->status) < 0)
 357                 return true;
 358
 359         if (c->volume < 0)
 360                 c->volume = mpd_status_get_volume(c->status);
 361
 362         if (c->volume <= 0)
 363                 return true;
 364
 365         return mpdclient_cmd_volume(c, --c->volume);
 366 }
 367
 368 bool
 369 mpdclient_cmd_add_path(struct mpdclient *c, const gchar *path_utf8)
 370 {
 371         struct mpd_connection *connection = mpdclient_get_connection(c);
 372         if (connection == NULL)
 373                 return false;
 374
 375         mpd_send_add(connection, path_utf8);
 376         return mpdclient_finish_command(c);
 377 }
 378
 379 bool
 380 mpdclient_cmd_add(struct mpdclient *c, const struct mpd_song *song)
 381 {
 382         struct mpd_connection *connection = mpdclient_get_connection(c);
 383         struct mpd_status *status;
 384         struct mpd_song *new_song;
 385
 386         assert(c != NULL);
 387         assert(song != NULL);
 388
 389         if (connection == NULL || c->status == NULL)
 390                 return false;
 391
 392         /* send the add command to mpd; at the same time, get the new
 393            status (to verify the new playlist id) and the last song
 394            (we hope that's the song we just added) */
 395
 396         if (!mpd_command_list_begin(connection, true) ||
 397             !mpd_send_add(connection, mpd_song_get_uri(song)) ||
 398             !mpd_send_status(connection) ||
 399             !mpd_send_get_queue_song_pos(connection,
 400                                          playlist_length(&c->playlist)) ||
 401             !mpd_command_list_end(connection) ||
 402             !mpd_response_next(connection))
 403                 return mpdclient_handle_error(c);
 404
 405         c->events |= MPD_IDLE_PLAYLIST;
 406
 407         status = mpd_recv_status(connection);
 408         if (status != NULL) {
 409                 if (c->status != NULL)
 410                         mpd_status_free(c->status);
 411                 c->status = status;
 412         }
 413
 414         if (!mpd_response_next(connection))
 415                 return mpdclient_handle_error(c);
 416
 417         new_song = mpd_recv_song(connection);
 418         if (!mpd_response_finish(connection) || new_song == NULL) {
 419                 if (new_song != NULL)
 420                         mpd_song_free(new_song);
 421
 422                 return mpd_connection_clear_error(connection) ||
 423                         mpdclient_handle_error(c);
 424         }
 425
 426         if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) + 1 &&
 427             mpd_status_get_queue_version(status) == c->playlist.version + 1) {
 428                 /* the cheap route: match on the new playlist length
 429                    and its version, we can keep our local playlist
 430                    copy in sync */
 431                 c->playlist.version = mpd_status_get_queue_version(status);
 432
 433                 /* the song we just received has the correct id;
 434                    append it to the local playlist */
 435                 playlist_append(&c->playlist, new_song);
 436         }
 437
 438         mpd_song_free(new_song);
 439
 440         return true;
 441 }
 442
 443 bool
 444 mpdclient_cmd_delete(struct mpdclient *c, gint idx)
 445 {
 446         struct mpd_connection *connection = mpdclient_get_connection(c);
 447         const struct mpd_song *song;
 448         struct mpd_status *status;
 449
 450         if (connection == NULL || c->status == NULL)
 451                 return false;
 452
 453         if (idx < 0 || (guint)idx >= playlist_length(&c->playlist))
 454                 return false;
 455
 456         song = playlist_get(&c->playlist, idx);
 457
 458         /* send the delete command to mpd; at the same time, get the
 459            new status (to verify the playlist id) */
 460
 461         if (!mpd_command_list_begin(connection, false) ||
 462             !mpd_send_delete_id(connection, mpd_song_get_id(song)) ||
 463             !mpd_send_status(connection) ||
 464             !mpd_command_list_end(connection))
 465                 return mpdclient_handle_error(c);
 466
 467         c->events |= MPD_IDLE_PLAYLIST;
 468
 469         status = mpd_recv_status(connection);
 470         if (status != NULL) {
 471                 if (c->status != NULL)
 472                         mpd_status_free(c->status);
 473                 c->status = status;
 474         }
 475
 476         if (!mpd_response_finish(connection))
 477                 return mpdclient_handle_error(c);
 478
 479         if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) - 1 &&
 480             mpd_status_get_queue_version(status) == c->playlist.version + 1) {
 481                 /* the cheap route: match on the new playlist length
 482                    and its version, we can keep our local playlist
 483                    copy in sync */
 484                 c->playlist.version = mpd_status_get_queue_version(status);
 485
 486                 /* remove the song from the local playlist */
 487                 playlist_remove(&c->playlist, idx);
 488
 489                 /* remove references to the song */
 490                 if (c->song == song)
 491                         c->song = NULL;
 492         }
 493
 494         return true;
 495 }
 496
 497 /**
 498  * Fallback for mpdclient_cmd_delete_range() on MPD older than 0.16.
 499  * It emulates the "delete range" command with a list of simple
 500  * "delete" commands.
 501  */
 502 static bool
 503 mpdclient_cmd_delete_range_fallback(struct mpdclient *c,
 504                                     unsigned start, unsigned end)
 505 {
 506         struct mpd_connection *connection = mpdclient_get_connection(c);
 507         if (connection == NULL)
 508                 return false;
 509
 510         if (!mpd_command_list_begin(connection, false))
 511                 return mpdclient_handle_error(c);
 512
 513         for (; start < end; --end)
 514                 mpd_send_delete(connection, start);
 515
 516         if (!mpd_command_list_end(connection) ||
 517             !mpd_response_finish(connection))
 518                 return mpdclient_handle_error(c);
 519
 520         return true;
 521 }
 522
 523 bool
 524 mpdclient_cmd_delete_range(struct mpdclient *c, unsigned start, unsigned end)
 525 {
 526         struct mpd_connection *connection;
 527         struct mpd_status *status;
 528
 529         if (end == start + 1)
 530                 /* if that's not really a range, we choose to use the
 531                    safer "deleteid" version */
 532                 return mpdclient_cmd_delete(c, start);
 533
 534         connection = mpdclient_get_connection(c);
 535         if (connection == NULL)
 536                 return false;
 537
 538         if (mpd_connection_cmp_server_version(connection, 0, 16, 0) < 0)
 539                 return mpdclient_cmd_delete_range_fallback(c, start, end);
 540
 541         /* MPD 0.16 supports "delete" with a range argument */
 542
 543         /* send the delete command to mpd; at the same time, get the
 544            new status (to verify the playlist id) */
 545
 546         if (!mpd_command_list_begin(connection, false) ||
 547             !mpd_send_delete_range(connection, start, end) ||
 548             !mpd_send_status(connection) ||
 549             !mpd_command_list_end(connection))
 550                 return mpdclient_handle_error(c);
 551
 552         c->events |= MPD_IDLE_PLAYLIST;
 553
 554         status = mpd_recv_status(connection);
 555         if (status != NULL) {
 556                 if (c->status != NULL)
 557                         mpd_status_free(c->status);
 558                 c->status = status;
 559         }
 560
 561         if (!mpd_response_finish(connection))
 562                 return mpdclient_handle_error(c);
 563
 564         if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) - (end - start) &&
 565             mpd_status_get_queue_version(status) == c->playlist.version + 1) {
 566                 /* the cheap route: match on the new playlist length
 567                    and its version, we can keep our local playlist
 568                    copy in sync */
 569                 c->playlist.version = mpd_status_get_queue_version(status);
 570
 571                 /* remove the song from the local playlist */
 572                 while (end > start) {
 573                         --end;
 574
 575                         /* remove references to the song */
 576                         if (c->song == playlist_get(&c->playlist, end))
 577                                 c->song = NULL;
 578
 579                         playlist_remove(&c->playlist, end);
 580                 }
 581         }
 582
 583         return true;
 584 }
 585
 586 bool
 587 mpdclient_cmd_move(struct mpdclient *c, gint old_index, gint new_index)
 588 {
 589         struct mpd_connection *connection = mpdclient_get_connection(c);
 590         const struct mpd_song *song1, *song2;
 591         struct mpd_status *status;
 592
 593         if (connection == NULL)
 594                 return false;
 595
 596         if (old_index == new_index || new_index < 0 ||
 597             (guint)new_index >= c->playlist.list->len)
 598                 return false;
 599
 600         song1 = playlist_get(&c->playlist, old_index);
 601         song2 = playlist_get(&c->playlist, new_index);
 602
 603         /* send the delete command to mpd; at the same time, get the
 604            new status (to verify the playlist id) */
 605
 606         if (!mpd_command_list_begin(connection, false) ||
 607             !mpd_send_swap_id(connection, mpd_song_get_id(song1),
 608                               mpd_song_get_id(song2)) ||
 609             !mpd_send_status(connection) ||
 610             !mpd_command_list_end(connection))
 611                 return mpdclient_handle_error(c);
 612
 613         c->events |= MPD_IDLE_PLAYLIST;
 614
 615         status = mpd_recv_status(connection);
 616         if (status != NULL) {
 617                 if (c->status != NULL)
 618                         mpd_status_free(c->status);
 619                 c->status = status;
 620         }
 621
 622         if (!mpd_response_finish(connection))
 623                 return mpdclient_handle_error(c);
 624
 625         if (mpd_status_get_queue_length(status) == playlist_length(&c->playlist) &&
 626             mpd_status_get_queue_version(status) == c->playlist.version + 1) {
 627                 /* the cheap route: match on the new playlist length
 628                    and its version, we can keep our local playlist
 629                    copy in sync */
 630                 c->playlist.version = mpd_status_get_queue_version(status);
 631
 632                 /* swap songs in the local playlist */
 633                 playlist_swap(&c->playlist, old_index, new_index);
 634         }
 635
 636         return true;
 637 }
 638
 639
 640 /****************************************************************************/
 641 /*** Playlist management functions ******************************************/
 642 /****************************************************************************/
 643
 644 /* update playlist */
 645 bool
 646 mpdclient_playlist_update(struct mpdclient *c)
 647 {
 648         struct mpd_connection *connection = mpdclient_get_connection(c);
 649         struct mpd_entity *entity;
 650
 651         if (connection == NULL)
 652                 return false;
 653
 654         playlist_clear(&c->playlist);
 655
 656         mpd_send_list_queue_meta(connection);
 657         while ((entity = mpd_recv_entity(connection))) {
 658                 if (mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG)
 659                         playlist_append(&c->playlist, mpd_entity_get_song(entity));
 660
 661                 mpd_entity_free(entity);
 662         }
 663
 664         c->playlist.version = mpd_status_get_queue_version(c->status);
 665         c->song = NULL;
 666
 667         return mpdclient_finish_command(c);
 668 }
 669
 670 /* update playlist (plchanges) */
 671 bool
 672 mpdclient_playlist_update_changes(struct mpdclient *c)
 673 {
 674         struct mpd_connection *connection = mpdclient_get_connection(c);
 675         struct mpd_song *song;
 676         guint length;
 677
 678         if (connection == NULL)
 679                 return false;
 680
 681         mpd_send_queue_changes_meta(connection, c->playlist.version);
 682
 683         while ((song = mpd_recv_song(connection)) != NULL) {
 684                 int pos = mpd_song_get_pos(song);
 685
 686                 if (pos >= 0 && (guint)pos < c->playlist.list->len) {
 687                         /* update song */
 688                         playlist_replace(&c->playlist, pos, song);
 689                 } else {
 690                         /* add a new song */
 691                         playlist_append(&c->playlist, song);
 692                 }
 693
 694                 mpd_song_free(song);
 695         }
 696
 697         /* remove trailing songs */
 698
 699         length = mpd_status_get_queue_length(c->status);
 700         while (length < c->playlist.list->len) {
 701                 guint pos = c->playlist.list->len - 1;
 702
 703                 /* Remove the last playlist entry */
 704                 playlist_remove(&c->playlist, pos);
 705         }
 706
 707         c->song = NULL;
 708         c->playlist.version = mpd_status_get_queue_version(c->status);
 709
 710         return mpdclient_finish_command(c);
 711 }
 712
 713
 714 /****************************************************************************/
 715 /*** Filelist functions *****************************************************/
 716 /****************************************************************************/
 717
 718 bool
 719 mpdclient_filelist_add_all(struct mpdclient *c, struct filelist *fl)
 720 {
 721         struct mpd_connection *connection = mpdclient_get_connection(c);
 722         guint i;
 723
 724         if (connection == NULL)
 725                 return false;
 726
 727         if (filelist_is_empty(fl))
 728                 return true;
 729
 730         mpd_command_list_begin(connection, false);
 731
 732         for (i = 0; i < filelist_length(fl); ++i) {
 733                 struct filelist_entry *entry = filelist_get(fl, i);
 734                 struct mpd_entity *entity  = entry->entity;
 735
 736                 if (entity != NULL &&
 737                     mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_SONG) {
 738                         const struct mpd_song *song =
 739                                 mpd_entity_get_song(entity);
 740
 741                         mpd_send_add(connection, mpd_song_get_uri(song));
 742                 }
 743         }
 744
 745         mpd_command_list_end(connection);
 746         return mpdclient_finish_command(c);
 747 }