apps/misc.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Daniel 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 <ctype.h>
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #include <errno.h>
  26 #include "string-extra.h"
  27 #include "config.h"
  28 #include "misc.h"
  29 #include "system.h"
  30 #include "lcd.h"
  31 #include "file.h"
  32 #include "filefuncs.h"
  33 #ifndef __PCTOOL__
  34 #include "lang.h"
  35 #include "dir.h"
  36 #include "lcd-remote.h"
  37 #include "system.h"
  38 #include "timefuncs.h"
  39 #include "screens.h"
  40 #include "usb_screen.h"
  41 #include "talk.h"
  42 #include "audio.h"
  43 #include "mp3_playback.h"
  44 #include "settings.h"
  45 #include "storage.h"
  46 #include "ata_idle_notify.h"
  47 #include "kernel.h"
  48 #include "power.h"
  49 #include "powermgmt.h"
  50 #include "backlight.h"
  51 #include "version.h"
  52 #include "font.h"
  53 #include "splash.h"
  54 #include "tagcache.h"
  55 #include "scrobbler.h"
  56 #include "sound.h"
  57 #include "playlist.h"
  58 #include "yesno.h"
  59 #include "viewport.h"
  60
  61 #include "debug.h"
  62
  63 #if CONFIG_TUNER
  64 #include "radio.h"
  65 #endif
  66
  67 #ifdef IPOD_ACCESSORY_PROTOCOL
  68 #include "iap.h"
  69 #endif
  70
  71 #if (CONFIG_STORAGE & STORAGE_MMC)
  72 #include "ata_mmc.h"
  73 #endif
  74 #include "tree.h"
  75 #include "eeprom_settings.h"
  76 #if defined(HAVE_RECORDING) && !defined(__PCTOOL__)
  77 #include "recording.h"
  78 #endif
  79 #if defined(HAVE_LCD_BITMAP) && !defined(__PCTOOL__)
  80 #include "bmp.h"
  81 #include "icons.h"
  82 #endif /* End HAVE_LCD_BITMAP */
  83 #include "bookmark.h"
  84 #include "wps.h"
  85 #include "playback.h"
  86 #if CONFIG_CODEC == SWCODEC
  87 #include "voice_thread.h"
  88 #endif
  89
  90 #ifdef BOOTFILE
  91 #if !defined(USB_NONE) && !defined(USB_HANDLED_BY_OF) \
  92         || defined(HAVE_HOTSWAP_STORAGE_AS_MAIN)
  93 #include "rolo.h"
  94 #endif
  95 #endif
  96
  97 /* units used with output_dyn_value */
  98 const unsigned char * const byte_units[] =
  99 {
 100     ID2P(LANG_BYTE),
 101     ID2P(LANG_KILOBYTE),
 102     ID2P(LANG_MEGABYTE),
 103     ID2P(LANG_GIGABYTE)
 104 };
 105
 106 const unsigned char * const * const kbyte_units = &byte_units[1];
 107
 108 /* Format a large-range value for output, using the appropriate unit so that
 109  * the displayed value is in the range 1 <= display < 1000 (1024 for "binary"
 110  * units) if possible, and 3 significant digits are shown. If a buffer is
 111  * given, the result is snprintf()'d into that buffer, otherwise the result is
 112  * voiced.*/
 113 char *output_dyn_value(char *buf, int buf_size, int value,
 114                        const unsigned char * const *units, bool bin_scale)
 115 {
 116     int scale = bin_scale ? 1024 : 1000;
 117     int fraction = 0;
 118     int unit_no = 0;
 119     char tbuf[5];
 120
 121     while (value >= scale)
 122     {
 123         fraction = value % scale;
 124         value /= scale;
 125         unit_no++;
 126     }
 127     if (bin_scale)
 128         fraction = fraction * 1000 / 1024;
 129
 130     if (value >= 100 || !unit_no)
 131         tbuf[0] = '\0';
 132     else if (value >= 10)
 133         snprintf(tbuf, sizeof(tbuf), "%01d", fraction / 100);
 134     else
 135         snprintf(tbuf, sizeof(tbuf), "%02d", fraction / 10);
 136
 137     if (buf)
 138     {
 139         if (*tbuf)
 140             snprintf(buf, buf_size, "%d%s%s%s", value, str(LANG_POINT),
 141                      tbuf, P2STR(units[unit_no]));
 142         else
 143             snprintf(buf, buf_size, "%d%s", value, P2STR(units[unit_no]));
 144     }
 145     else
 146     {
 147         talk_fractional(tbuf, value, P2ID(units[unit_no]));
 148     }
 149     return buf;
 150 }
 151
 152 /* Ask the user if they really want to erase the current dynamic playlist
 153  * returns true if the playlist should be replaced */
 154 bool warn_on_pl_erase(void)
 155 {
 156     if (global_settings.warnon_erase_dynplaylist &&
 157         !global_settings.party_mode &&
 158         playlist_modified(NULL))
 159     {
 160         static const char *lines[] =
 161             {ID2P(LANG_WARN_ERASEDYNPLAYLIST_PROMPT)};
 162         static const struct text_message message={lines, 1};
 163
 164         return (gui_syncyesno_run(&message, NULL, NULL) == YESNO_YES);
 165     }
 166     else
 167         return true;
 168 }
 169
 170
 171 /* Performance optimized version of the read_line() (see below) function. */
 172 int fast_readline(int fd, char *buf, int buf_size, void *parameters,
 173                   int (*callback)(int n, const char *buf, void *parameters))
 174 {
 175     char *p, *next;
 176     int rc, pos = 0;
 177     int count = 0;
 178
 179     while ( 1 )
 180     {
 181         next = NULL;
 182
 183         rc = read(fd, &buf[pos], buf_size - pos - 1);
 184         if (rc >= 0)
 185             buf[pos+rc] = '\0';
 186
 187         if ( (p = strchr(buf, '\n')) != NULL)
 188         {
 189             *p = '\0';
 190             next = ++p;
 191         }
 192
 193         rc = callback(count, buf, parameters);
 194         if (rc < 0)
 195             return rc;
 196
 197         count++;
 198         if (next)
 199         {
 200             pos = buf_size - ((long)next - (long)buf) - 1;
 201             memmove(buf, next, pos);
 202         }
 203         else
 204             break ;
 205     }
 206
 207     return 0;
 208 }
 209
 210 /* parse a line from a configuration file. the line format is:
 211
 212    name: value
 213
 214    Any whitespace before setting name or value (after ':') is ignored.
 215    A # as first non-whitespace character discards the whole line.
 216    Function sets pointers to null-terminated setting name and value.
 217    Returns false if no valid config entry was found.
 218 */
 219
 220 bool settings_parseline(char* line, char** name, char** value)
 221 {
 222     char* ptr;
 223
 224     line = skip_whitespace(line);
 225
 226     if ( *line == '#' )
 227         return false;
 228
 229     ptr = strchr(line, ':');
 230     if ( !ptr )
 231         return false;
 232
 233     *name = line;
 234     *ptr = 0;
 235     ptr++;
 236     ptr = skip_whitespace(ptr);
 237     *value = ptr;
 238     return true;
 239 }
 240
 241 static void system_flush(void)
 242 {
 243     scrobbler_shutdown();
 244     playlist_shutdown();
 245     tree_flush();
 246     call_storage_idle_notifys(true); /*doesnt work on usb and shutdown from ata thread */
 247 }
 248
 249 static void system_restore(void)
 250 {
 251     tree_restore();
 252     scrobbler_init();
 253 }
 254
 255 static bool clean_shutdown(void (*callback)(void *), void *parameter)
 256 {
 257     long msg_id = -1;
 258     int i;
 259
 260     scrobbler_poweroff();
 261
 262 #if CONFIG_CHARGING && !defined(HAVE_POWEROFF_WHILE_CHARGING)
 263     if(!charger_inserted())
 264 #endif
 265     {
 266         bool batt_safe = battery_level_safe();
 267         int audio_stat = audio_status();
 268
 269         FOR_NB_SCREENS(i)
 270         {
 271             screens[i].clear_display();
 272             screens[i].update();
 273         }
 274
 275         if (batt_safe)
 276         {
 277 #ifdef HAVE_TAGCACHE
 278             if (!tagcache_prepare_shutdown())
 279             {
 280                 cancel_shutdown();
 281                 splash(HZ, ID2P(LANG_TAGCACHE_BUSY));
 282                 return false;
 283             }
 284 #endif
 285             if (battery_level() > 10)
 286                 splash(0, str(LANG_SHUTTINGDOWN));
 287             else
 288             {
 289                 msg_id = LANG_WARNING_BATTERY_LOW;
 290                 splashf(0, "%s %s", str(LANG_WARNING_BATTERY_LOW),
 291                                     str(LANG_SHUTTINGDOWN));
 292             }
 293         }
 294         else
 295         {
 296             msg_id = LANG_WARNING_BATTERY_EMPTY;
 297             splashf(0, "%s %s", str(LANG_WARNING_BATTERY_EMPTY),
 298                                 str(LANG_SHUTTINGDOWN));
 299         }
 300
 301         if (global_settings.fade_on_stop
 302             && (audio_stat & AUDIO_STATUS_PLAY))
 303         {
 304             fade(false, false);
 305         }
 306
 307         if (batt_safe) /* do not save on critical battery */
 308         {
 309 #if defined(HAVE_RECORDING) && CONFIG_CODEC == SWCODEC
 310             if (audio_stat & AUDIO_STATUS_RECORD)
 311             {
 312                 rec_command(RECORDING_CMD_STOP);
 313                 /* wait for stop to complete */
 314                 while (audio_status() & AUDIO_STATUS_RECORD)
 315                     sleep(1);
 316             }
 317 #endif
 318             bookmark_autobookmark(false);
 319
 320             /* audio_stop_recording == audio_stop for HWCODEC */
 321             audio_stop();
 322
 323             if (callback != NULL)
 324                 callback(parameter);
 325
 326 #if CONFIG_CODEC != SWCODEC
 327             /* wait for audio_stop or audio_stop_recording to complete */
 328             while (audio_status())
 329                 sleep(1);
 330 #endif
 331
 332 #if defined(HAVE_RECORDING) && CONFIG_CODEC == SWCODEC
 333             audio_close_recording();
 334 #endif
 335
 336             if(global_settings.talk_menu)
 337             {
 338                 bool enqueue = false;
 339                 if(msg_id != -1)
 340                 {
 341                     talk_id(msg_id, enqueue);
 342                     enqueue = true;
 343                 }
 344                 talk_id(LANG_SHUTTINGDOWN, enqueue);
 345 #if CONFIG_CODEC == SWCODEC
 346                 voice_wait();
 347 #endif
 348             }
 349
 350             system_flush();
 351 #ifdef HAVE_EEPROM_SETTINGS
 352             if (firmware_settings.initialized)
 353             {
 354                 firmware_settings.disk_clean = true;
 355                 firmware_settings.bl_version = 0;
 356                 eeprom_settings_store();
 357             }
 358 #endif
 359         }
 360 #ifdef HAVE_DIRCACHE
 361         else
 362             dircache_disable();
 363 #endif
 364
 365         shutdown_hw();
 366     }
 367     return false;
 368 }
 369
 370 bool list_stop_handler(void)
 371 {
 372     bool ret = false;
 373
 374 #if CONFIG_TUNER
 375     radio_stop();
 376 #endif
 377
 378     /* Stop the music if it is playing */
 379     if(audio_status())
 380     {
 381         if (!global_settings.party_mode)
 382         {
 383             if (global_settings.fade_on_stop)
 384                 fade(false, false);
 385             bookmark_autobookmark(true);
 386             audio_stop();
 387             ret = true;  /* bookmarking can make a refresh necessary */
 388         }
 389     }
 390 #if CONFIG_CHARGING
 391 #if (CONFIG_KEYPAD == RECORDER_PAD) && !defined(HAVE_SW_POWEROFF)
 392     else
 393     {
 394         if (charger_inserted())
 395             charging_splash();
 396         else
 397             shutdown_screen(); /* won't return if shutdown actually happens */
 398
 399         ret = true;  /* screen is dirty, caller needs to refresh */
 400     }
 401 #endif
 402 #ifndef HAVE_POWEROFF_WHILE_CHARGING
 403     {
 404         static long last_off = 0;
 405
 406         if (TIME_BEFORE(current_tick, last_off + HZ/2))
 407         {
 408             if (charger_inserted())
 409             {
 410                 charging_splash();
 411                 ret = true;  /* screen is dirty, caller needs to refresh */
 412             }
 413         }
 414         last_off = current_tick;
 415     }
 416 #endif
 417 #endif /* CONFIG_CHARGING */
 418     return ret;
 419 }
 420
 421 #if CONFIG_CHARGING
 422 static bool waiting_to_resume_play = false;
 423 static long play_resume_tick;
 424
 425 static void car_adapter_mode_processing(bool inserted)
 426 {
 427     if (global_settings.car_adapter_mode)
 428     {
 429         if(inserted)
 430         {
 431             /*
 432              * Just got plugged in, delay & resume if we were playing
 433              */
 434             if (audio_status() & AUDIO_STATUS_PAUSE)
 435             {
 436                 /* delay resume a bit while the engine is cranking */
 437                 play_resume_tick = current_tick + HZ*5;
 438                 waiting_to_resume_play = true;
 439             }
 440         }
 441         else
 442         {
 443             /*
 444              * Just got unplugged, pause if playing
 445              */
 446             if ((audio_status() & AUDIO_STATUS_PLAY) &&
 447                 !(audio_status() & AUDIO_STATUS_PAUSE))
 448             {
 449                 pause_action(true, true);
 450             }
 451             waiting_to_resume_play = false;
 452         }
 453     }
 454 }
 455
 456 static void car_adapter_tick(void)
 457 {
 458     if (waiting_to_resume_play)
 459     {
 460         if (TIME_AFTER(current_tick, play_resume_tick))
 461         {
 462             if (audio_status() & AUDIO_STATUS_PAUSE)
 463             {
 464                 queue_broadcast(SYS_CAR_ADAPTER_RESUME, 0);
 465             }
 466             waiting_to_resume_play = false;
 467         }
 468     }
 469 }
 470
 471 void car_adapter_mode_init(void)
 472 {
 473     tick_add_task(car_adapter_tick);
 474 }
 475 #endif
 476
 477 #ifdef HAVE_HEADPHONE_DETECTION
 478 static void unplug_change(bool inserted)
 479 {
 480     static bool headphone_caused_pause = false;
 481
 482     if (global_settings.unplug_mode)
 483     {
 484         int audio_stat = audio_status();
 485         if (inserted)
 486         {
 487             backlight_on();
 488             if ((audio_stat & AUDIO_STATUS_PLAY) &&
 489                     headphone_caused_pause &&
 490                     global_settings.unplug_mode > 1 )
 491                 unpause_action(true, true);
 492             headphone_caused_pause = false;
 493         } else {
 494             if ((audio_stat & AUDIO_STATUS_PLAY) &&
 495                     !(audio_stat & AUDIO_STATUS_PAUSE))
 496             {
 497                 headphone_caused_pause = true;
 498                 pause_action(false, false);
 499             }
 500         }
 501     }
 502 }
 503 #endif
 504
 505 long default_event_handler_ex(long event, void (*callback)(void *), void *parameter)
 506 {
 507 #if CONFIG_PLATFORM & (PLATFORM_ANDROID|PLATFORM_MAEMO)
 508     static bool resume = false;
 509 #endif
 510
 511     switch(event)
 512     {
 513         case SYS_BATTERY_UPDATE:
 514             if(global_settings.talk_battery_level)
 515             {
 516                 talk_ids(true, VOICE_PAUSE, VOICE_PAUSE,
 517                          LANG_BATTERY_TIME,
 518                          TALK_ID(battery_level(), UNIT_PERCENT),
 519                          VOICE_PAUSE);
 520                 talk_force_enqueue_next();
 521             }
 522             break;
 523         case SYS_USB_CONNECTED:
 524             if (callback != NULL)
 525                 callback(parameter);
 526 #if (CONFIG_STORAGE & STORAGE_MMC)
 527             if (!mmc_touched() ||
 528                 (mmc_remove_request() == SYS_HOTSWAP_EXTRACTED))
 529 #endif
 530             {
 531                 system_flush();
 532 #ifdef BOOTFILE
 533 #if !defined(USB_NONE) && !defined(USB_HANDLED_BY_OF)
 534                 check_bootfile(false); /* gets initial size */
 535 #endif
 536 #endif
 537                 gui_usb_screen_run(false);
 538 #ifdef BOOTFILE
 539 #if !defined(USB_NONE) && !defined(USB_HANDLED_BY_OF)
 540                 check_bootfile(true);
 541 #endif
 542 #endif
 543                 system_restore();
 544             }
 545             return SYS_USB_CONNECTED;
 546
 547         case SYS_POWEROFF:
 548             if (!clean_shutdown(callback, parameter))
 549                 return SYS_POWEROFF;
 550             break;
 551 #if CONFIG_CHARGING
 552         case SYS_CHARGER_CONNECTED:
 553             car_adapter_mode_processing(true);
 554             return SYS_CHARGER_CONNECTED;
 555
 556         case SYS_CHARGER_DISCONNECTED:
 557             car_adapter_mode_processing(false);
 558             /*reset rockbox battery runtime*/
 559             global_status.runtime = 0;
 560             return SYS_CHARGER_DISCONNECTED;
 561
 562         case SYS_CAR_ADAPTER_RESUME:
 563             unpause_action(true, true);
 564             return SYS_CAR_ADAPTER_RESUME;
 565 #endif
 566 #ifdef HAVE_HOTSWAP_STORAGE_AS_MAIN
 567         case SYS_FS_CHANGED:
 568         {
 569             /* simple sanity: assume rockbox is on the first hotswappable
 570              * driver, abort out if that one isn't inserted */
 571             int i;
 572             for (i = 0; i < NUM_DRIVES; i++)
 573             {
 574                 if (storage_removable(i) && !storage_present(i))
 575                     return SYS_FS_CHANGED;
 576             }
 577             system_flush();
 578             check_bootfile(true); /* state gotten in main.c:init() */
 579             system_restore();
 580         }
 581             return SYS_FS_CHANGED;
 582 #endif
 583 #ifdef HAVE_HEADPHONE_DETECTION
 584         case SYS_PHONE_PLUGGED:
 585             unplug_change(true);
 586             return SYS_PHONE_PLUGGED;
 587
 588         case SYS_PHONE_UNPLUGGED:
 589             unplug_change(false);
 590             return SYS_PHONE_UNPLUGGED;
 591 #endif
 592 #ifdef IPOD_ACCESSORY_PROTOCOL
 593         case SYS_IAP_PERIODIC:
 594             iap_periodic();
 595             return SYS_IAP_PERIODIC;
 596         case SYS_IAP_HANDLEPKT:
 597             iap_handlepkt();
 598             return SYS_IAP_HANDLEPKT;
 599 #endif
 600 #if CONFIG_PLATFORM & (PLATFORM_ANDROID|PLATFORM_MAEMO)
 601         /* stop playback if we receive a call */
 602         case SYS_CALL_INCOMING:
 603             resume = audio_status() == AUDIO_STATUS_PLAY;
 604             list_stop_handler();
 605             return SYS_CALL_INCOMING;
 606         /* resume playback if needed */
 607         case SYS_CALL_HUNG_UP:
 608             if (resume && playlist_resume() != -1)
 609             {
 610                 playlist_start(global_status.resume_index,
 611                                global_status.resume_offset);
 612             }
 613             resume = false;
 614             return SYS_CALL_HUNG_UP;
 615 #endif
 616 #if (CONFIG_PLATFORM & PLATFORM_HOSTED) && defined(PLATFORM_HAS_VOLUME_CHANGE)
 617         case SYS_VOLUME_CHANGED:
 618         {
 619             static bool firstvolume = true;
 620             int volume = hosted_get_volume();
 621             DEBUGF("SYS_VOLUME_CHANGED: %d\n", volume);
 622             if (global_settings.volume != volume) {
 623                 global_settings.volume = volume;
 624                 if (firstvolume) {
 625                     setvol();
 626                     firstvolume = false;
 627                 }
 628             }
 629             return 0;
 630         }
 631 #endif
 632 #ifdef HAVE_MULTIMEDIA_KEYS
 633         /* multimedia keys on keyboards, headsets */
 634         case BUTTON_MULTIMEDIA_PLAYPAUSE:
 635         {
 636             int status = audio_status();
 637             if (status & AUDIO_STATUS_PLAY)
 638             {
 639                 if (status & AUDIO_STATUS_PAUSE)
 640                     unpause_action(true, true);
 641                 else
 642                     pause_action(true, true);
 643             }
 644             else
 645                 if (playlist_resume() != -1)
 646                 {
 647                     playlist_start(global_status.resume_index,
 648                                    global_status.resume_offset);
 649                 }
 650             return event;
 651         }
 652         case BUTTON_MULTIMEDIA_NEXT:
 653             audio_next();
 654             return event;
 655         case BUTTON_MULTIMEDIA_PREV:
 656             audio_prev();
 657             return event;
 658         case BUTTON_MULTIMEDIA_STOP:
 659             list_stop_handler();
 660             return event;
 661         case BUTTON_MULTIMEDIA_REW:
 662         case BUTTON_MULTIMEDIA_FFWD:
 663             /* not supported yet, needs to be done in the WPS */
 664             return 0;
 665 #endif
 666     }
 667     return 0;
 668 }
 669
 670 long default_event_handler(long event)
 671 {
 672     return default_event_handler_ex(event, NULL, NULL);
 673 }
 674
 675 int show_logo( void )
 676 {
 677 #ifdef HAVE_LCD_BITMAP
 678     char version[32];
 679     int font_h, font_w;
 680
 681     snprintf(version, sizeof(version), "Ver. %s", rbversion);
 682
 683     lcd_clear_display();
 684 #if defined(SANSA_CLIP) || defined(SANSA_CLIPV2) || defined(SANSA_CLIPPLUS)
 685     /* display the logo in the blue area of the screen */
 686     lcd_setfont(FONT_SYSFIXED);
 687     lcd_getstringsize((unsigned char *)"A", &font_w, &font_h);
 688     lcd_putsxy((LCD_WIDTH/2) - ((strlen(version)*font_w)/2),
 689                0, (unsigned char *)version);
 690     lcd_bitmap(rockboxlogo, (LCD_WIDTH - BMPWIDTH_rockboxlogo) / 2, 16,
 691             BMPWIDTH_rockboxlogo, BMPHEIGHT_rockboxlogo);
 692 #else
 693     lcd_bitmap(rockboxlogo, (LCD_WIDTH - BMPWIDTH_rockboxlogo) / 2, 10,
 694             BMPWIDTH_rockboxlogo, BMPHEIGHT_rockboxlogo);
 695     lcd_setfont(FONT_SYSFIXED);
 696     lcd_getstringsize((unsigned char *)"A", &font_w, &font_h);
 697     lcd_putsxy((LCD_WIDTH/2) - ((strlen(version)*font_w)/2),
 698                LCD_HEIGHT-font_h, (unsigned char *)version);
 699 #endif
 700     lcd_setfont(FONT_UI);
 701
 702 #else
 703     char *rockbox = "  ROCKbox!";
 704
 705     lcd_clear_display();
 706     lcd_double_height(true);
 707     lcd_puts(0, 0, rockbox);
 708     lcd_puts_scroll(0, 1, rbversion);
 709 #endif
 710     lcd_update();
 711
 712 #ifdef HAVE_REMOTE_LCD
 713     lcd_remote_clear_display();
 714     lcd_remote_bitmap(remote_rockboxlogo, 0, 10, BMPWIDTH_remote_rockboxlogo,
 715                       BMPHEIGHT_remote_rockboxlogo);
 716     lcd_remote_setfont(FONT_SYSFIXED);
 717     lcd_remote_getstringsize((unsigned char *)"A", &font_w, &font_h);
 718     lcd_remote_putsxy((LCD_REMOTE_WIDTH/2) - ((strlen(version)*font_w)/2),
 719                        LCD_REMOTE_HEIGHT-font_h, (unsigned char *)version);
 720     lcd_remote_setfont(FONT_UI);
 721     lcd_remote_update();
 722 #endif
 723
 724     return 0;
 725 }
 726
 727 #ifdef BOOTFILE
 728 #if !defined(USB_NONE) && !defined(USB_HANDLED_BY_OF) || defined(HAVE_HOTSWAP_STORAGE_AS_MAIN)
 729 /*
 730     memorize/compare details about the BOOTFILE
 731     we don't use dircache because it may not be up to date after
 732     USB disconnect (scanning in the background)
 733 */
 734 void check_bootfile(bool do_rolo)
 735 {
 736     static unsigned short wrtdate = 0;
 737     static unsigned short wrttime = 0;
 738     DIR* dir = NULL;
 739     struct dirent* entry = NULL;
 740
 741     /* 1. open BOOTDIR and find the BOOTFILE dir entry */
 742     dir = opendir(BOOTDIR);
 743
 744     if(!dir) return; /* do we want an error splash? */
 745
 746     /* loop all files in BOOTDIR */
 747     while(0 != (entry = readdir(dir)))
 748     {
 749         if(!strcasecmp(entry->d_name, BOOTFILE))
 750         {
 751             struct dirinfo info = dir_get_info(dir, entry);
 752             /* found the bootfile */
 753             if(wrtdate && do_rolo)
 754             {
 755                 if((info.wrtdate != wrtdate) ||
 756                    (info.wrttime != wrttime))
 757                 {
 758                     static const char *lines[] = { ID2P(LANG_BOOT_CHANGED),
 759                                                    ID2P(LANG_REBOOT_NOW) };
 760                     static const struct text_message message={ lines, 2 };
 761                     button_clear_queue(); /* Empty the keyboard buffer */
 762                     if(gui_syncyesno_run(&message, NULL, NULL) == YESNO_YES)
 763                         rolo_load(BOOTDIR "/" BOOTFILE);
 764                 }
 765             }
 766             wrtdate = info.wrtdate;
 767             wrttime = info.wrttime;
 768         }
 769     }
 770     closedir(dir);
 771 }
 772 #endif
 773 #endif
 774
 775 /* check range, set volume and save settings */
 776 void setvol(void)
 777 {
 778     const int min_vol = sound_min(SOUND_VOLUME);
 779     const int max_vol = sound_max(SOUND_VOLUME);
 780     if (global_settings.volume < min_vol)
 781         global_settings.volume = min_vol;
 782     if (global_settings.volume > max_vol)
 783         global_settings.volume = max_vol;
 784     sound_set_volume(global_settings.volume);
 785     global_status.last_volume_change = current_tick;
 786     settings_save();
 787 }
 788
 789 char* strrsplt(char* str, int c)
 790 {
 791     char* s = strrchr(str, c);
 792
 793     if (s != NULL)
 794     {
 795         *s++ = '\0';
 796     }
 797     else
 798     {
 799         s = str;
 800     }
 801
 802     return s;
 803 }
 804
 805 /*
 806  * removes the extension of filename (if it doesn't start with a .)
 807  * puts the result in buffer
 808  */
 809 char *strip_extension(char* buffer, int buffer_size, const char *filename)
 810 {
 811     char *dot = strrchr(filename, '.');
 812     int len;
 813
 814     if (buffer_size <= 0)
 815     {
 816         return NULL;
 817     }
 818
 819     buffer_size--;  /* Make room for end nil */
 820
 821     if (dot != 0 && filename[0] != '.')
 822     {
 823         len = dot - filename;
 824         len = MIN(len, buffer_size);
 825     }
 826     else
 827     {
 828         len = buffer_size;
 829     }
 830
 831     strlcpy(buffer, filename, len + 1);
 832
 833     return buffer;
 834 }
 835 #endif /* !defined(__PCTOOL__) */
 836
 837 /* Read (up to) a line of text from fd into buffer and return number of bytes
 838  * read (which may be larger than the number of bytes stored in buffer). If
 839  * an error occurs, -1 is returned (and buffer contains whatever could be
 840  * read). A line is terminated by a LF char. Neither LF nor CR chars are
 841  * stored in buffer.
 842  */
 843 int read_line(int fd, char* buffer, int buffer_size)
 844 {
 845     int count = 0;
 846     int num_read = 0;
 847
 848     errno = 0;
 849
 850     while (count < buffer_size)
 851     {
 852         unsigned char c;
 853
 854         if (1 != read(fd, &c, 1))
 855             break;
 856
 857         num_read++;
 858
 859         if ( c == '\n' )
 860             break;
 861
 862         if ( c == '\r' )
 863             continue;
 864
 865         buffer[count++] = c;
 866     }
 867
 868     buffer[MIN(count, buffer_size - 1)] = 0;
 869
 870     return errno ? -1 : num_read;
 871 }
 872
 873
 874 char* skip_whitespace(char* const str)
 875 {
 876     char *s = str;
 877
 878     while (isspace(*s))
 879         s++;
 880
 881     return s;
 882 }
 883
 884 /* Format time into buf.
 885  *
 886  * buf      - buffer to format to.
 887  * buf_size - size of buffer.
 888  * t        - time to format, in milliseconds.
 889  */
 890 void format_time(char* buf, int buf_size, long t)
 891 {
 892     int const time = abs(t / 1000);
 893     int const hours = time / 3600;
 894     int const minutes = time / 60 - hours * 60;
 895     int const seconds = time % 60;
 896     const char * const sign = &"-"[t < 0 ? 0 : 1];
 897
 898     if ( hours == 0 )
 899     {
 900         snprintf(buf, buf_size, "%s%d:%02d", sign, minutes, seconds);
 901     }
 902     else
 903     {
 904         snprintf(buf, buf_size, "%s%d:%02d:%02d", sign, hours, minutes,
 905                  seconds);
 906     }
 907 }
 908
 909
 910 /** Open a UTF-8 file and set file descriptor to first byte after BOM.
 911  *  If no BOM is present this behaves like open().
 912  *  If the file is opened for writing and O_TRUNC is set, write a BOM to
 913  *  the opened file and leave the file pointer set after the BOM.
 914  */
 915 #define BOM "\xef\xbb\xbf"
 916 #define BOM_SIZE 3
 917
 918 int open_utf8(const char* pathname, int flags)
 919 {
 920     int fd;
 921     unsigned char bom[BOM_SIZE];
 922
 923     fd = open(pathname, flags, 0666);
 924     if(fd < 0)
 925         return fd;
 926
 927     if(flags & (O_TRUNC | O_WRONLY))
 928     {
 929         write(fd, BOM, BOM_SIZE);
 930     }
 931     else
 932     {
 933         read(fd, bom, BOM_SIZE);
 934         /* check for BOM */
 935         if(memcmp(bom, BOM, BOM_SIZE))
 936             lseek(fd, 0, SEEK_SET);
 937     }
 938     return fd;
 939 }
 940
 941
 942 #ifdef HAVE_LCD_COLOR
 943 /*
 944  * Helper function to convert a string of 6 hex digits to a native colour
 945  */
 946
 947 static int hex2dec(int c)
 948 {
 949     return  (((c) >= '0' && ((c) <= '9')) ? (c) - '0' :
 950                                             (toupper(c)) - 'A' + 10);
 951 }
 952
 953 int hex_to_rgb(const char* hex, int* color)
 954 {
 955     int red, green, blue;
 956     int i = 0;
 957
 958     while ((i < 6) && (isxdigit(hex[i])))
 959         i++;
 960
 961     if (i < 6)
 962         return -1;
 963
 964     red = (hex2dec(hex[0]) << 4) | hex2dec(hex[1]);
 965     green = (hex2dec(hex[2]) << 4) | hex2dec(hex[3]);
 966     blue = (hex2dec(hex[4]) << 4) | hex2dec(hex[5]);
 967
 968     *color = LCD_RGBPACK(red,green,blue);
 969
 970     return 0;
 971 }
 972 #endif /* HAVE_LCD_COLOR */
 973
 974 #ifdef HAVE_LCD_BITMAP
 975 /* '0'-'3' are ASCII 0x30 to 0x33 */
 976 #define is0123(x) (((x) & 0xfc) == 0x30)
 977 #if !defined(__PCTOOL__) || defined(CHECKWPS)
 978 bool parse_color(enum screen_type screen, char *text, int *value)
 979 {
 980     (void)text; (void)value; /* silence warnings on mono bitmap */
 981     (void)screen;
 982
 983 #ifdef HAVE_LCD_COLOR
 984     if (screens[screen].depth > 2)
 985     {
 986         if (hex_to_rgb(text, value) < 0)
 987             return false;
 988         else
 989             return true;
 990     }
 991 #endif
 992
 993 #if LCD_DEPTH == 2 || (defined(HAVE_REMOTE_LCD) && LCD_REMOTE_DEPTH == 2)
 994     if (screens[screen].depth == 2)
 995     {
 996         if (text[1] != '\0' || !is0123(*text))
 997             return false;
 998         *value = *text - '0';
 999         return true;
1000     }
1001 #endif
1002     return false;
1003 }
1004 #endif /* !defined(__PCTOOL__) || defined(CHECKWPS) */
1005
1006 /* only used in USB HID and set_time screen */
1007 #if defined(USB_ENABLE_HID) || (CONFIG_RTC != 0)
1008 int clamp_value_wrap(int value, int max, int min)
1009 {
1010     if (value > max)
1011         return min;
1012     if (value < min)
1013         return max;
1014     return value;
1015 }
1016 #endif
1017 #endif
1018 #define MAX_ACTIVITY_DEPTH 12
1019 static enum current_activity
1020         current_activity[MAX_ACTIVITY_DEPTH] = {ACTIVITY_UNKNOWN};
1021 static int current_activity_top = 0;
1022 void push_current_activity(enum current_activity screen)
1023 {
1024     current_activity[current_activity_top++] = screen;
1025 }
1026 void pop_current_activity(void)
1027 {
1028     current_activity_top--;
1029 }
1030 enum current_activity get_current_activity(void)
1031 {
1032     return current_activity[current_activity_top?current_activity_top-1:0];
1033 }
1034