apps/filetree.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 by Björn Stenberg
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include <stdlib.h>
  22 #include <file.h>
  23 #include <dir.h>
  24 #include <string.h>
  25 #include <kernel.h>
  26 #include <lcd.h>
  27 #include <debug.h>
  28 #include <font.h>
  29 #include <limits.h>
  30 #include "bookmark.h"
  31 #include "tree.h"
  32 #include "settings.h"
  33 #include "filetypes.h"
  34 #include "talk.h"
  35 #include "playlist.h"
  36 #include "lang.h"
  37 #include "language.h"
  38 #include "screens.h"
  39 #include "plugin.h"
  40 #include "rolo.h"
  41 #include "sprintf.h"
  42 #include "splash.h"
  43 #include "cuesheet.h"
  44 #include "filetree.h"
  45 #include "misc.h"
  46 #include "strnatcmp.h"
  47 #ifdef HAVE_LCD_BITMAP
  48 #include "keyboard.h"
  49 #endif
  50
  51 #if CONFIG_TUNER
  52 #include "radio.h"
  53 #endif
  54 #include "wps.h"
  55 #include "backdrop.h"
  56
  57 static int compare_sort_dir; /* qsort key for sorting directories */
  58
  59 int ft_build_playlist(struct tree_context* c, int start_index)
  60 {
  61     int i;
  62     int start=start_index;
  63
  64     struct entry *dircache = c->dircache;
  65
  66     for(i = 0;i < c->filesindir;i++)
  67     {
  68         if((dircache[i].attr & FILE_ATTR_MASK) == FILE_ATTR_AUDIO)
  69         {
  70             if (playlist_add(dircache[i].name) < 0)
  71                 break;
  72         }
  73         else
  74         {
  75             /* Adjust the start index when se skip non-MP3 entries */
  76             if(i < start)
  77                 start_index--;
  78         }
  79     }
  80
  81     return start_index;
  82 }
  83
  84 /* Start playback of a playlist, checking for bookmark autoload, modified
  85  * playlists, etc., as required. Returns false if playback wasn't started,
  86  * or started via bookmark autoload, true otherwise.
  87  *
  88  * Pointers to both the full pathname and the separated parts needed to
  89  * avoid allocating yet another path buffer on the stack (and save some
  90  * code; the caller typically needs to create the full pathname anyway)...
  91  */
  92 bool ft_play_playlist(char* pathname, char* dirname, char* filename)
  93 {
  94     if (global_settings.party_mode && audio_status())
  95     {
  96         splash(HZ, ID2P(LANG_PARTY_MODE));
  97         return false;
  98     }
  99
 100     if (bookmark_autoload(pathname))
 101     {
 102         return false;
 103     }
 104
 105     splash(0, ID2P(LANG_WAIT));
 106
 107     /* about to create a new current playlist...
 108        allow user to cancel the operation */
 109     if (!warn_on_pl_erase())
 110         return false;
 111
 112     if (playlist_create(dirname, filename) != -1)
 113     {
 114         if (global_settings.playlist_shuffle)
 115         {
 116             playlist_shuffle(current_tick, -1);
 117         }
 118
 119         playlist_start(0, 0);
 120         return true;
 121     }
 122
 123     return false;
 124 }
 125
 126 /* walk a directory and check all dircache entries if a .talk file exists */
 127 static void check_file_thumbnails(struct tree_context* c)
 128 {
 129     int i;
 130     struct dirent *entry;
 131     struct entry* dircache = c->dircache;
 132     DIR *dir;
 133
 134     dir = opendir(c->currdir);
 135     if(!dir)
 136         return;
 137     /* mark all files as non talking, except the .talk ones */
 138     for (i=0; i < c->filesindir; i++)
 139     {
 140         if (dircache[i].attr & ATTR_DIRECTORY)
 141             continue; /* we're not touching directories */
 142
 143         if (strcasecmp(file_thumbnail_ext,
 144             &dircache[i].name[strlen(dircache[i].name)
 145                               - strlen(file_thumbnail_ext)]))
 146         {   /* no .talk file */
 147             dircache[i].attr &= ~FILE_ATTR_THUMBNAIL; /* clear */
 148         }
 149         else
 150         {   /* .talk file, we later let them speak themselves */
 151             dircache[i].attr |= FILE_ATTR_THUMBNAIL; /* set */
 152         }
 153     }
 154
 155     while((entry = readdir(dir)) != 0) /* walk directory */
 156     {
 157         int ext_pos;
 158
 159         ext_pos = strlen((char *)entry->d_name) - strlen(file_thumbnail_ext);
 160         if (ext_pos <= 0 /* too short to carry ".talk" */
 161             || (entry->attribute & ATTR_DIRECTORY) /* no file */
 162             || strcasecmp((char *)&entry->d_name[ext_pos], file_thumbnail_ext))
 163         {   /* or doesn't end with ".talk", no candidate */
 164             continue;
 165         }
 166
 167         /* terminate the (disposable) name in dir buffer,
 168            this truncates off the ".talk" without needing an extra buffer */
 169         entry->d_name[ext_pos] = '\0';
 170
 171         /* search corresponding file in dir cache */
 172         for (i=0; i < c->filesindir; i++)
 173         {
 174             if (!strcasecmp(dircache[i].name, (char *)entry->d_name))
 175             {   /* match */
 176                 dircache[i].attr |= FILE_ATTR_THUMBNAIL; /* set the flag */
 177                 break; /* exit search loop, because we found it */
 178             }
 179         }
 180     }
 181     closedir(dir);
 182 }
 183
 184 static void filetree_drawlists(void)
 185 {
 186     gui_synclist_draw(&tree_lists);
 187 }
 188
 189 /* support function for qsort() */
 190 static int compare(const void* p1, const void* p2)
 191 {
 192     struct entry* e1 = (struct entry*)p1;
 193     struct entry* e2 = (struct entry*)p2;
 194     int criteria;
 195
 196     if (e1->attr & ATTR_DIRECTORY && e2->attr & ATTR_DIRECTORY)
 197     {   /* two directories */
 198         criteria = compare_sort_dir;
 199
 200 #ifdef HAVE_MULTIVOLUME
 201         if (e1->attr & ATTR_VOLUME || e2->attr & ATTR_VOLUME)
 202         {   /* a volume identifier is involved */
 203             if (e1->attr & ATTR_VOLUME && e2->attr & ATTR_VOLUME)
 204                 criteria = SORT_ALPHA; /* two volumes: sort alphabetically */
 205             else /* only one is a volume: volume first */
 206                 return (e2->attr & ATTR_VOLUME) - (e1->attr & ATTR_VOLUME);
 207         }
 208 #endif
 209
 210     }
 211     else if (!(e1->attr & ATTR_DIRECTORY) && !(e2->attr & ATTR_DIRECTORY))
 212     {   /* two files */
 213         criteria = global_settings.sort_file;
 214     }
 215     else /* dir and file, dir goes first */
 216         return (e2->attr & ATTR_DIRECTORY) - (e1->attr & ATTR_DIRECTORY);
 217
 218     switch(criteria)
 219     {
 220         case SORT_TYPE:
 221         case SORT_TYPE_REVERSED:
 222         {
 223             int t1 = e1->attr & FILE_ATTR_MASK;
 224             int t2 = e2->attr & FILE_ATTR_MASK;
 225
 226             if (!t1) /* unknown type */
 227                 t1 = INT_MAX; /* gets a high number, to sort after known */
 228             if (!t2) /* unknown type */
 229                 t2 = INT_MAX; /* gets a high number, to sort after known */
 230
 231             if (t1 != t2) /* if different */
 232                 return (t1 - t2) * (criteria == SORT_TYPE_REVERSED ? -1 : 1);
 233             /* else fall through to alphabetical sorting */
 234         }
 235
 236         case SORT_DATE:
 237         case SORT_DATE_REVERSED:
 238             /* Ignore SORT_TYPE */
 239             if (criteria == SORT_DATE || criteria == SORT_DATE_REVERSED)
 240             {
 241                 if (e1->time_write != e2->time_write)
 242                     return (e1->time_write - e2->time_write)
 243                            * (criteria == SORT_DATE_REVERSED ? -1 : 1);
 244                 /* else fall through to alphabetical sorting */
 245             }
 246
 247         case SORT_ALPHA:
 248         case SORT_ALPHA_REVERSED:
 249         {
 250             if (global_settings.sort_case)
 251             {
 252                 if (global_settings.interpret_numbers == SORT_INTERPRET_AS_NUMBER)
 253                     return strnatcmp(e1->name, e2->name)
 254                            * (criteria == SORT_ALPHA_REVERSED ? -1 : 1);
 255                 else
 256                     return strncmp(e1->name, e2->name, MAX_PATH)
 257                            * (criteria == SORT_ALPHA_REVERSED ? -1 : 1);
 258             }
 259             else
 260             {
 261                 if (global_settings.interpret_numbers == SORT_INTERPRET_AS_NUMBER)
 262                     return strnatcasecmp(e1->name, e2->name)
 263                            * (criteria == SORT_ALPHA_REVERSED ? -1 : 1);
 264                 else
 265                     return strncasecmp(e1->name, e2->name, MAX_PATH)
 266                            * (criteria == SORT_ALPHA_REVERSED ? -1 : 1);
 267             }
 268         }
 269
 270     }
 271     return 0; /* never reached */
 272 }
 273
 274 /* load and sort directory into dircache. returns NULL on failure. */
 275 int ft_load(struct tree_context* c, const char* tempdir)
 276 {
 277     int i;
 278     int name_buffer_used = 0;
 279     DIR *dir;
 280
 281     if (tempdir)
 282         dir = opendir(tempdir);
 283     else
 284         dir = opendir(c->currdir);
 285     if(!dir)
 286         return -1; /* not a directory */
 287
 288     c->dirsindir = 0;
 289     c->dirfull = false;
 290
 291     for ( i=0; i < global_settings.max_files_in_dir; i++ ) {
 292         int len;
 293         struct dirent *entry = readdir(dir);
 294         struct entry* dptr =
 295             (struct entry*)(c->dircache + i * sizeof(struct entry));
 296         if (!entry)
 297             break;
 298
 299         len = strlen((char *)entry->d_name);
 300
 301         /* skip directories . and .. */
 302         if ((entry->attribute & ATTR_DIRECTORY) &&
 303             (((len == 1) && (!strncmp((char *)entry->d_name, ".", 1))) ||
 304              ((len == 2) && (!strncmp((char *)entry->d_name, "..", 2))))) {
 305             i--;
 306             continue;
 307         }
 308
 309         /* Skip FAT volume ID */
 310         if (entry->attribute & ATTR_VOLUME_ID) {
 311             i--;
 312             continue;
 313         }
 314
 315         /* filter out dotfiles and hidden files */
 316         if (*c->dirfilter != SHOW_ALL &&
 317             ((entry->d_name[0]=='.') ||
 318             (entry->attribute & ATTR_HIDDEN))) {
 319             i--;
 320             continue;
 321         }
 322
 323         dptr->attr = entry->attribute;
 324
 325         /* check for known file types */
 326         if ( !(dptr->attr & ATTR_DIRECTORY) )
 327             dptr->attr |= filetype_get_attr((char *)entry->d_name);
 328
 329         /* filter out non-visible files */
 330         if ((!(dptr->attr & ATTR_DIRECTORY) && (
 331             (*c->dirfilter == SHOW_PLAYLIST &&
 332              (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_M3U) ||
 333             ((*c->dirfilter == SHOW_MUSIC &&
 334              (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_AUDIO) &&
 335              (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_M3U) ||
 336             (*c->dirfilter == SHOW_SUPPORTED && !filetype_supported(dptr->attr)))) ||
 337             (*c->dirfilter == SHOW_WPS && (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_WPS) ||
 338 #ifdef HAVE_REMOTE_LCD
 339             (*c->dirfilter == SHOW_RWPS && (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_RWPS) ||
 340 #endif
 341 #if CONFIG_TUNER
 342             (*c->dirfilter == SHOW_FMR && (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_FMR) ||
 343 #endif
 344             (*c->dirfilter == SHOW_CFG && (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_CFG) ||
 345             (*c->dirfilter == SHOW_LNG && (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_LNG) ||
 346             (*c->dirfilter == SHOW_MOD && (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_MOD) ||
 347             (*c->dirfilter == SHOW_FONT && (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_FONT) ||
 348             (*c->dirfilter == SHOW_PLUGINS && (dptr->attr & FILE_ATTR_MASK) != FILE_ATTR_ROCK))
 349         {
 350             i--;
 351             continue;
 352         }
 353
 354         if (len > c->name_buffer_size - name_buffer_used - 1) {
 355             /* Tell the world that we ran out of buffer space */
 356             c->dirfull = true;
 357             break;
 358         }
 359         dptr->name = &c->name_buffer[name_buffer_used];
 360         dptr->time_write =
 361             (long)entry->wrtdate<<16 |
 362             (long)entry->wrttime; /* in one # */
 363         strcpy(dptr->name, (char *)entry->d_name);
 364         name_buffer_used += len + 1;
 365
 366         if (dptr->attr & ATTR_DIRECTORY) /* count the remaining dirs */
 367             c->dirsindir++;
 368     }
 369     c->filesindir = i;
 370     c->dirlength = i;
 371     closedir(dir);
 372
 373     compare_sort_dir = c->sort_dir;
 374     qsort(c->dircache,i,sizeof(struct entry),compare);
 375
 376     /* If thumbnail talking is enabled, make an extra run to mark files with
 377        associated thumbnails, so we don't do unsuccessful spinups later. */
 378     if (global_settings.talk_file_clip)
 379         check_file_thumbnails(c); /* map .talk to ours */
 380
 381     return 0;
 382 }
 383
 384 int ft_enter(struct tree_context* c)
 385 {
 386     int rc = 0;
 387     char buf[MAX_PATH];
 388     struct entry *dircache = c->dircache;
 389     struct entry* file = &dircache[c->selected_item];
 390     bool reload_dir = false;
 391     bool start_wps = false;
 392     bool exit_func = false;
 393
 394     if (c->currdir[1])
 395         snprintf(buf,sizeof(buf),"%s/%s",c->currdir, file->name);
 396     else
 397         snprintf(buf,sizeof(buf),"/%s",file->name);
 398
 399     if (file->attr & ATTR_DIRECTORY) {
 400         memcpy(c->currdir, buf, sizeof(c->currdir));
 401         if ( c->dirlevel < MAX_DIR_LEVELS )
 402             c->selected_item_history[c->dirlevel] = c->selected_item;
 403         c->dirlevel++;
 404         c->selected_item=0;
 405     }
 406     else {
 407         int seed = current_tick;
 408         bool play = false;
 409         int start_index=0;
 410
 411         switch ( file->attr & FILE_ATTR_MASK ) {
 412             case FILE_ATTR_M3U:
 413                 play = ft_play_playlist(buf, c->currdir, file->name);
 414
 415                 if (play)
 416                 {
 417                     start_index = 0;
 418                 }
 419
 420                 break;
 421
 422             case FILE_ATTR_AUDIO:
 423                 if (bookmark_autoload(c->currdir))
 424                     break;
 425
 426                 splash(0, ID2P(LANG_WAIT));
 427
 428                 /* about to create a new current playlist...
 429                    allow user to cancel the operation */
 430                 if (!warn_on_pl_erase())
 431                     break;
 432
 433                 if (global_settings.party_mode && audio_status())
 434                 {
 435                     playlist_insert_track(NULL, buf,
 436                                           PLAYLIST_INSERT_LAST, true, true);
 437                     splash(HZ, ID2P(LANG_QUEUE_LAST));
 438                 }
 439                 else if (playlist_create(c->currdir, NULL) != -1)
 440                 {
 441                     start_index = ft_build_playlist(c, c->selected_item);
 442                     if (global_settings.playlist_shuffle)
 443                     {
 444                         start_index = playlist_shuffle(seed, start_index);
 445
 446                         /* when shuffling dir.: play all files
 447                            even if the file selected by user is
 448                            not the first one */
 449                         if (!global_settings.play_selected)
 450                             start_index = 0;
 451                     }
 452
 453                     playlist_start(start_index, 0);
 454                     play = true;
 455                 }
 456                 break;
 457
 458 #if CONFIG_TUNER
 459                 /* fmr preset file */
 460             case FILE_ATTR_FMR:
 461                 splash(0, ID2P(LANG_WAIT));
 462
 463                 /* Preset inside the default folder. */
 464                 if(!strncasecmp(FMPRESET_PATH, buf, strlen(FMPRESET_PATH)))
 465                 {
 466                     set_file(buf, global_settings.fmr_file, MAX_FILENAME);
 467                     radio_load_presets(global_settings.fmr_file);
 468                     if(!in_radio_screen())
 469                         radio_screen();
 470                 }
 471                 /*
 472                  * Preset outside default folder, we can choose such only
 473                  * if we are out of the radio screen, so the check for the
 474                  * radio status isn't neccessary
 475                  */
 476                 else
 477                 {
 478                     radio_load_presets(buf);
 479                     radio_screen();
 480                 }
 481
 482                 break;
 483 #endif
 484
 485
 486                 /* wps config file */
 487             case FILE_ATTR_WPS:
 488                 splash(0, ID2P(LANG_WAIT));
 489 #if LCD_DEPTH > 1
 490                 backdrop_unload(BACKDROP_SKIN_WPS);
 491 #endif
 492                 wps_data_load(SCREEN_MAIN, buf, true);
 493                 set_file(buf, (char *)global_settings.wps_file,
 494                          MAX_FILENAME);
 495                 settings_apply_skins();
 496                 break;
 497
 498 #if defined(HAVE_REMOTE_LCD) && (NB_SCREENS > 1)
 499                 /* remote-wps config file */
 500             case FILE_ATTR_RWPS:
 501                 splash(0, ID2P(LANG_WAIT));
 502 #if defined(HAVE_REMOTE_LCD) && LCD_REMOTE_DEPTH > 1
 503                 remote_backdrop_unload(BACKDROP_SKIN_WPS);
 504 #endif
 505                 wps_data_load(SCREEN_REMOTE, buf, true);
 506                 set_file(buf, (char *)global_settings.rwps_file,
 507                          MAX_FILENAME);
 508                 settings_apply_skins();
 509                 break;
 510 #endif
 511
 512             case FILE_ATTR_CFG:
 513                 splash(0, ID2P(LANG_WAIT));
 514                 if (!settings_load_config(buf,true))
 515                     break;
 516                 /* do both steps seperately so that the redrawing after theme
 517                  * changing is independant of whether the theme has a custom ui
 518                  * vp or not */
 519                 send_event(GUI_EVENT_REFRESH, NULL);
 520                 /* for the statusbar */
 521                 send_event(GUI_EVENT_ACTIONUPDATE, (void*)true);
 522                 filetree_drawlists();
 523                 splash(HZ, ID2P(LANG_SETTINGS_LOADED));
 524                 break;
 525
 526             case FILE_ATTR_BMARK:
 527                 splash(0, ID2P(LANG_WAIT));
 528                 bookmark_load(buf, false);
 529                 reload_dir = true;
 530                 break;
 531
 532             case FILE_ATTR_LNG:
 533                 splash(0, ID2P(LANG_WAIT));
 534                 if(!lang_load(buf)) {
 535                     set_file(buf, (char *)global_settings.lang_file,
 536                              MAX_FILENAME);
 537                     talk_init(); /* use voice of same language */
 538                     splash(HZ, ID2P(LANG_LANGUAGE_LOADED));
 539                 }
 540                 break;
 541
 542 #ifdef HAVE_LCD_BITMAP
 543             case FILE_ATTR_FONT:
 544                 splash(0, ID2P(LANG_WAIT));
 545                 font_load(buf);
 546                 set_file(buf, (char *)global_settings.font_file, MAX_FILENAME);
 547                 break;
 548
 549             case FILE_ATTR_KBD:
 550                 splash(0, ID2P(LANG_WAIT));
 551                 if (!load_kbd(buf))
 552                     splash(HZ, ID2P(LANG_KEYBOARD_LOADED));
 553                 set_file(buf, (char *)global_settings.kbd_file, MAX_FILENAME);
 554                 break;
 555 #endif
 556
 557 #ifndef SIMULATOR
 558                 /* firmware file */
 559             case FILE_ATTR_MOD:
 560                 splash(0, ID2P(LANG_WAIT));
 561                 rolo_load(buf);
 562                 break;
 563 #endif
 564
 565                 /* plugin file */
 566             case FILE_ATTR_ROCK:
 567             {
 568                 int ret;
 569                 if (global_settings.party_mode && audio_status()) {
 570                     splash(HZ, ID2P(LANG_PARTY_MODE));
 571                     break;
 572                 }
 573                 ret = plugin_load(buf,NULL);
 574                 switch (ret)
 575                 {
 576                     case PLUGIN_GOTO_WPS:
 577                         play = true;
 578                         break;
 579                     case PLUGIN_USB_CONNECTED:
 580                         if(*c->dirfilter > NUM_FILTER_MODES)
 581                             /* leave sub-browsers after usb, doing
 582                                otherwise might be confusing to the user */
 583                             exit_func = true;
 584                         else
 585                             reload_dir = true;
 586                         break;
 587                     /*
 588                     case PLUGIN_ERROR:
 589                     case PLUGIN_OK:
 590                     */
 591                     default:
 592                         break;
 593                 }
 594                 break;
 595             }
 596             case FILE_ATTR_CUE:
 597                 display_cuesheet_content(buf);
 598                 break;
 599
 600             default:
 601             {
 602                 const char* plugin;
 603
 604                 if (global_settings.party_mode && audio_status()) {
 605                     splash(HZ, ID2P(LANG_PARTY_MODE));
 606                     break;
 607                 }
 608
 609                 plugin = filetype_get_plugin(file);
 610                 if (plugin)
 611                 {
 612                     switch (plugin_load(plugin,buf))
 613                     {
 614                         case PLUGIN_USB_CONNECTED:
 615                             reload_dir = true;
 616                             break;
 617                         case PLUGIN_GOTO_WPS:
 618                             play = true;
 619                             break;
 620                         /*
 621                         case PLUGIN_OK:
 622                         case PLUGIN_ERROR:
 623                         */
 624                         default:
 625                             break;
 626                     }
 627                 }
 628                 break;
 629             }
 630         }
 631
 632         send_event(GUI_EVENT_REFRESH, filetree_drawlists);
 633
 634         if ( play ) {
 635             /* the resume_index must always be the index in the
 636                shuffled list in case shuffle is enabled */
 637             global_status.resume_index = start_index;
 638             global_status.resume_offset = 0;
 639             status_save();
 640
 641             start_wps = true;
 642         }
 643         else {
 644             if (*c->dirfilter > NUM_FILTER_MODES &&
 645                 *c->dirfilter != SHOW_CFG &&
 646                 *c->dirfilter != SHOW_FONT &&
 647                 *c->dirfilter != SHOW_PLUGINS)
 648             {
 649                 exit_func = true;
 650             }
 651         }
 652     }
 653
 654     if (reload_dir)
 655         rc = 1;
 656     if (start_wps)
 657         rc = 2;
 658     if (exit_func)
 659         rc = 3;
 660
 661     return rc;
 662 }
 663
 664 int ft_exit(struct tree_context* c)
 665 {
 666     extern char lastfile[]; /* from tree.c */
 667     char buf[MAX_PATH];
 668     int rc = 0;
 669     bool exit_func = false;
 670
 671     int i = strlen(c->currdir);
 672     if (i>1) {
 673         while (c->currdir[i-1]!='/')
 674             i--;
 675         strcpy(buf,&c->currdir[i]);
 676         if (i==1)
 677             c->currdir[i]=0;
 678         else
 679             c->currdir[i-1]=0;
 680
 681         if (*c->dirfilter > NUM_FILTER_MODES && c->dirlevel < 1)
 682             exit_func = true;
 683
 684         c->dirlevel--;
 685         if ( c->dirlevel < MAX_DIR_LEVELS )
 686             c->selected_item=c->selected_item_history[c->dirlevel];
 687         else
 688             c->selected_item=0;
 689
 690         /* if undefined position */
 691         if (c->selected_item == -1)
 692             strcpy(lastfile, buf);
 693     }
 694     else
 695     {
 696         if (*c->dirfilter > NUM_FILTER_MODES && c->dirlevel < 1)
 697             exit_func = true;
 698     }
 699
 700     if (exit_func)
 701         rc = 3;
 702
 703     return rc;
 704 }