apps/plugins/dict.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Tomas Salfischberger
  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
  22 #include "plugin.h"
  23
  24 PLUGIN_HEADER
  25
  26 /* screen info */
  27 static int display_columns, display_lines;
  28
  29 /* Some lenghts */
  30 #define WORDLEN 32 /* has to be the same in rdf2binary.c */
  31
  32 /* Struct packing */
  33 #ifdef __GNUC__
  34 #define STRUCT_PACKED __attribute__((packed))
  35 #else
  36 #define STRUCT_PACKED
  37 #pragma pack (push, 2)
  38 #endif
  39
  40 /* The word struct :) */
  41 struct stWord
  42 {
  43     char word[WORDLEN];
  44     long offset;
  45 } STRUCT_PACKED;
  46
  47 /* A funtion to get width and height etc (from viewer.c) */
  48 void init_screen(void)
  49 {
  50 #ifdef HAVE_LCD_BITMAP
  51     int w,h;
  52
  53     rb->lcd_getstringsize("o", &w, &h);
  54     display_lines = LCD_HEIGHT / h;
  55     display_columns = LCD_WIDTH / w;
  56 #else
  57
  58     display_lines = 2;
  59     display_columns = 11;
  60 #endif
  61 }
  62
  63 /* global vars for pl_malloc() */
  64 void *bufptr;
  65 size_t bufleft;
  66
  67 /* simple function to "allocate" memory in pluginbuffer. */
  68 void *pl_malloc(size_t size)
  69 {
  70     void *ptr;
  71     ptr = bufptr;
  72
  73     if (bufleft < size)
  74     {
  75         return NULL;
  76     }
  77     else
  78     {
  79         bufptr += size;
  80         bufleft -= size;
  81         return ptr;
  82     }
  83 }
  84
  85 /* init function for pl_malloc() */
  86 void pl_malloc_init(void)
  87 {
  88     bufptr = rb->plugin_get_buffer(&bufleft);
  89 }
  90
  91 /* for endian problems */
  92 #ifdef ROCKBOX_BIG_ENDIAN
  93 #define reverse(x) x
  94 #else
  95 long reverse (long N) {
  96     unsigned char B[4];
  97     B[0] = (N & 0x000000FF) >> 0;
  98     B[1] = (N & 0x0000FF00) >> 8;
  99     B[2] = (N & 0x00FF0000) >> 16;
 100     B[3] = (N & 0xFF000000) >> 24;
 101     return ((B[0] << 24) | (B[1] << 16) | (B[2] << 8) | (B[3] << 0));
 102 }
 103 #endif
 104
 105 /* Button definitions */
 106 #if CONFIG_KEYPAD == PLAYER_PAD
 107 #define LP_QUIT BUTTON_STOP
 108 #elif (CONFIG_KEYPAD == IPOD_4G_PAD) || \
 109       (CONFIG_KEYPAD == IPOD_3G_PAD) || \
 110       (CONFIG_KEYPAD == IPOD_1G2G_PAD)
 111 #define LP_QUIT BUTTON_MENU
 112 #elif CONFIG_KEYPAD == IRIVER_IFP7XX_PAD
 113 #define LP_QUIT BUTTON_PLAY
 114 #elif CONFIG_KEYPAD == IAUDIO_X5M5_PAD
 115 #define LP_QUIT BUTTON_POWER
 116 #elif CONFIG_KEYPAD == GIGABEAT_PAD
 117 #define LP_QUIT BUTTON_POWER
 118 #elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \
 119       (CONFIG_KEYPAD == SANSA_C200_PAD) || \
 120       (CONFIG_KEYPAD == SANSA_CLIP_PAD) || \
 121       (CONFIG_KEYPAD == SANSA_M200_PAD)
 122 #define LP_QUIT BUTTON_POWER
 123 #elif (CONFIG_KEYPAD == SANSA_FUZE_PAD)
 124 #define LP_QUIT (BUTTON_HOME|BUTTON_REPEAT)
 125 #elif CONFIG_KEYPAD == IRIVER_H10_PAD
 126 #define LP_QUIT BUTTON_POWER
 127 #elif CONFIG_KEYPAD == MROBE500_PAD
 128 #define LP_QUIT BUTTON_POWER
 129 #elif CONFIG_KEYPAD == MROBE100_PAD
 130 #define LP_QUIT BUTTON_POWER
 131 #elif CONFIG_KEYPAD == GIGABEAT_S_PAD
 132 #define LP_QUIT BUTTON_BACK
 133 #elif CONFIG_KEYPAD == IAUDIO_M3_PAD
 134 #define LP_QUIT BUTTON_RC_REC
 135 #elif CONFIG_KEYPAD == COWON_D2_PAD
 136 #define LP_QUIT BUTTON_POWER
 137 #elif CONFIG_KEYPAD == IAUDIO67_PAD
 138 #define LP_QUIT BUTTON_POWER
 139 #elif CONFIG_KEYPAD == CREATIVEZVM_PAD
 140 #define LP_QUIT BUTTON_BACK
 141 #elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
 142 #define LP_QUIT BUTTON_POWER
 143 #elif CONFIG_KEYPAD == PHILIPS_SA9200_PAD
 144 #define LP_QUIT BUTTON_POWER
 145 #elif CONFIG_KEYPAD == ONDAVX747_PAD
 146 #define LP_QUIT BUTTON_POWER
 147 #elif CONFIG_KEYPAD == ONDAVX777_PAD
 148 #define LP_QUIT BUTTON_POWER
 149 #elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
 150 #define LP_QUIT BUTTON_LEFT
 151 #elif CONFIG_KEYPAD == PBELL_VIBE500_PAD
 152 #define LP_QUIT BUTTON_CANCEL
 153 #elif CONFIG_KEYPAD == MPIO_HD200_PAD
 154 #define LP_QUIT (BUTTON_REC|BUTTON_PLAY)
 155 #else
 156 #define LP_QUIT BUTTON_OFF
 157 #endif
 158
 159 /* data files */
 160 #define DICT_INDEX PLUGIN_APPS_DIR "/dict.index"
 161 #define DICT_DESC PLUGIN_APPS_DIR "/dict.desc"
 162
 163 /* the main plugin function */
 164 enum plugin_status plugin_start(const void* parameter)
 165 {
 166     char searchword[WORDLEN]; /* word to search for */
 167     char *description; /* pointer to description buffer */
 168     char *output; /* pointer to output buffer */
 169     char *ptr, *space;
 170     struct stWord word; /* the struct to read into */
 171     int fIndex, fData; /* files */
 172     int filesize, high, low, probe;
 173     int lines, len, outputted, next;
 174
 175     /* plugin stuff */
 176     (void)parameter;
 177
 178     /* get screen info */
 179     init_screen();
 180
 181     /* get pl_malloc() buffer ready. */
 182     pl_malloc_init();
 183
 184     /* init description buffer (size is because we don't have scrolling)*/
 185     description = (char *)pl_malloc(display_columns * display_lines);
 186     if (description == NULL)
 187     {
 188         DEBUGF("Err: failed to allocate description buffer.");
 189         return PLUGIN_ERROR;
 190     }
 191
 192     /* init output buffer */
 193     output = (char *)pl_malloc(display_columns);
 194     if (output == NULL)
 195     {
 196         DEBUGF("Err: failed to allocate output buffer.");
 197         return PLUGIN_ERROR;
 198     }
 199
 200     /* "clear" input buffer */
 201     searchword[0] = '\0';
 202
 203     rb->kbd_input(searchword, sizeof(searchword)); /* get the word to search */
 204
 205     fIndex = rb->open(DICT_INDEX, O_RDONLY); /* index file */
 206     if (fIndex < 0)
 207     {
 208         DEBUGF("Err: Failed to open index file.\n");
 209         rb->splash(HZ*2, "Failed to open index.");
 210         return PLUGIN_ERROR;
 211     }
 212
 213     filesize = rb->filesize(fIndex); /* get filesize */
 214
 215     DEBUGF("Filesize: %d bytes = %d words \n", filesize,
 216            (filesize / (int)sizeof(struct stWord)));
 217
 218     /* for the searching algorithm */
 219     high = filesize / sizeof( struct stWord );
 220     low = -1;
 221
 222     while (high - low > 1)
 223     {
 224         probe = (high + low) / 2;
 225
 226         /* Jump to word pointed by probe, and read it. */
 227         rb->lseek(fIndex, sizeof(struct stWord) * probe, SEEK_SET);
 228         rb->read(fIndex, &word, sizeof(struct stWord));
 229
 230         /* jump according to the found word. */
 231         if (rb->strcasecmp(searchword, word.word) < 0)
 232         {
 233             high = probe;
 234         }
 235         else
 236         {
 237             low = probe;
 238         }
 239     }
 240
 241     /* read in the word */
 242     rb->lseek(fIndex, sizeof(struct stWord) * low, SEEK_SET);
 243     rb->read(fIndex, &word, sizeof(struct stWord));
 244
 245     /* Check if we found something */
 246     if (low == -1 || rb->strcasecmp(searchword, word.word) != 0)
 247     {
 248         DEBUGF("Not found.\n");
 249         rb->splash(HZ*2, "Not found.");
 250         rb->close(fIndex);
 251         return PLUGIN_OK;
 252     }
 253
 254     DEBUGF("Found %s at offset %ld\n", word.word, reverse(word.offset));
 255
 256     /* now open the description file */
 257     fData = rb->open(DICT_DESC, O_RDONLY);
 258     if (fData < 0)
 259     {
 260         DEBUGF("Err: Failed to open description file.\n");
 261         rb->splash(HZ*2, "Failed to open descriptions.");
 262         rb->close(fIndex);
 263         return PLUGIN_ERROR;
 264     }
 265
 266     /* seek to the right offset */
 267     rb->lseek(fData, (off_t)reverse(word.offset), SEEK_SET);
 268
 269     /* Read in the description */
 270     rb->read_line(fData, description, display_columns * display_lines);
 271
 272     /* And print it to debug. */
 273     DEBUGF("Description: %s\n", description);
 274
 275     /* get pointer to first char */
 276     ptr = description;
 277
 278     lines = 0;
 279     outputted = 0;
 280     len = rb->strlen(description);
 281
 282     /* clear screen */
 283     rb->lcd_clear_display();
 284
 285     /* for large screens display the searched word. */
 286     if(display_lines > 4)
 287     {
 288         rb->lcd_puts(0, lines, searchword);
 289         lines++;
 290     }
 291
 292     /* TODO: Scroll, or just stop when there are to much lines. */
 293     while (1)
 294     {
 295         /* copy one lcd line */
 296         rb->strlcpy(output, ptr, display_columns + 1);
 297
 298         /* typecast to kill a warning... */
 299         if((int)rb->strlen(ptr) < display_columns)
 300         {
 301             rb->lcd_puts(0, lines, output);
 302             lines++;
 303             break;
 304         }
 305
 306
 307         /* get the last spacechar */
 308         space = rb->strrchr(output, ' ');
 309
 310         if (space != NULL)
 311         {
 312             *space = '\0';
 313             next = (space - (char*)output) + 1;
 314         }
 315         else
 316         {
 317             next = display_columns;
 318         }
 319
 320         /* put the line on screen */
 321         rb->lcd_puts(0, lines, output);
 322
 323         /* get output count */
 324         outputted += rb->strlen(output);
 325
 326         if (outputted < len)
 327         {
 328             /* set pointer to the next part */
 329             ptr += next;
 330             lines++;
 331         }
 332         else
 333         {
 334             break;
 335         }
 336     }
 337     rb->lcd_update();
 338
 339     /* wait for keypress */
 340     while(rb->button_get(true) != LP_QUIT)
 341     {
 342         /* do nothing */
 343         /* maybe define some keys for navigation here someday. */
 344     }
 345
 346     rb->close(fIndex);
 347     rb->close(fData);
 348     return PLUGIN_OK;
 349 }