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 ssize_t bufleft;
  66
  67 /* simple function to "allocate" memory in pluginbuffer. */
  68 void *pl_malloc(ssize_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((size_t *)&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 #else
 152 #define LP_QUIT BUTTON_OFF
 153 #endif
 154
 155 /* data files */
 156 #define DICT_INDEX PLUGIN_APPS_DIR "/dict.index"
 157 #define DICT_DESC PLUGIN_APPS_DIR "/dict.desc"
 158
 159 /* the main plugin function */
 160 enum plugin_status plugin_start(const void* parameter)
 161 {
 162     char searchword[WORDLEN]; /* word to search for */
 163     char *description; /* pointer to description buffer */
 164     char *output; /* pointer to output buffer */
 165     char *ptr, *space;
 166     struct stWord word; /* the struct to read into */
 167     int fIndex, fData; /* files */
 168     int filesize, high, low, probe;
 169     int lines, len, outputted, next;
 170
 171     /* plugin stuff */
 172     (void)parameter;
 173
 174     /* get screen info */
 175     init_screen();
 176
 177     /* get pl_malloc() buffer ready. */
 178     pl_malloc_init();
 179
 180     /* init description buffer (size is because we don't have scrolling)*/
 181     description = (char *)pl_malloc(display_columns * display_lines);
 182     if (description == NULL)
 183     {
 184         DEBUGF("Err: failed to allocate description buffer.");
 185         return PLUGIN_ERROR;
 186     }
 187
 188     /* init output buffer */
 189     output = (char *)pl_malloc(display_columns);
 190     if (output == NULL)
 191     {
 192         DEBUGF("Err: failed to allocate output buffer.");
 193         return PLUGIN_ERROR;
 194     }
 195
 196     /* "clear" input buffer */
 197     searchword[0] = '\0';
 198
 199     rb->kbd_input(searchword, sizeof(searchword)); /* get the word to search */
 200
 201     fIndex = rb->open(DICT_INDEX, O_RDONLY); /* index file */
 202     if (fIndex < 0)
 203     {
 204         DEBUGF("Err: Failed to open index file.\n");
 205         rb->splash(HZ*2, "Failed to open index.");
 206         return PLUGIN_ERROR;
 207     }
 208
 209     filesize = rb->filesize(fIndex); /* get filesize */
 210
 211     DEBUGF("Filesize: %d bytes = %d words \n", filesize,
 212            (filesize / (int)sizeof(struct stWord)));
 213
 214     /* for the searching algorithm */
 215     high = filesize / sizeof( struct stWord );
 216     low = -1;
 217
 218     while (high - low > 1)
 219     {
 220         probe = (high + low) / 2;
 221
 222         /* Jump to word pointed by probe, and read it. */
 223         rb->lseek(fIndex, sizeof(struct stWord) * probe, SEEK_SET);
 224         rb->read(fIndex, &word, sizeof(struct stWord));
 225
 226         /* jump according to the found word. */
 227         if (rb->strcasecmp(searchword, word.word) < 0)
 228         {
 229             high = probe;
 230         }
 231         else
 232         {
 233             low = probe;
 234         }
 235     }
 236
 237     /* read in the word */
 238     rb->lseek(fIndex, sizeof(struct stWord) * low, SEEK_SET);
 239     rb->read(fIndex, &word, sizeof(struct stWord));
 240
 241     /* Check if we found something */
 242     if (low == -1 || rb->strcasecmp(searchword, word.word) != 0)
 243     {
 244         DEBUGF("Not found.\n");
 245         rb->splash(HZ*2, "Not found.");
 246         rb->close(fIndex);
 247         return PLUGIN_OK;
 248     }
 249
 250     DEBUGF("Found %s at offset %ld\n", word.word, reverse(word.offset));
 251
 252     /* now open the description file */
 253     fData = rb->open(DICT_DESC, O_RDONLY);
 254     if (fData < 0)
 255     {
 256         DEBUGF("Err: Failed to open description file.\n");
 257         rb->splash(HZ*2, "Failed to open descriptions.");
 258         rb->close(fIndex);
 259         return PLUGIN_ERROR;
 260     }
 261
 262     /* seek to the right offset */
 263     rb->lseek(fData, (off_t)reverse(word.offset), SEEK_SET);
 264
 265     /* Read in the description */
 266     rb->read_line(fData, description, display_columns * display_lines);
 267
 268     /* And print it to debug. */
 269     DEBUGF("Description: %s\n", description);
 270
 271     /* get pointer to first char */
 272     ptr = description;
 273
 274     lines = 0;
 275     outputted = 0;
 276     len = rb->strlen(description);
 277
 278     /* clear screen */
 279     rb->lcd_clear_display();
 280
 281     /* for large screens display the searched word. */
 282     if(display_lines > 4)
 283     {
 284         rb->lcd_puts(0, lines, searchword);
 285         lines++;
 286     }
 287
 288     /* TODO: Scroll, or just stop when there are to much lines. */
 289     while (1)
 290     {
 291         /* copy one lcd line */
 292         rb->strlcpy(output, ptr, display_columns + 1);
 293
 294         /* typecast to kill a warning... */
 295         if((int)rb->strlen(ptr) < display_columns)
 296         {
 297             rb->lcd_puts(0, lines, output);
 298             lines++;
 299             break;
 300         }
 301
 302
 303         /* get the last spacechar */
 304         space = rb->strrchr(output, ' ');
 305
 306         if (space != NULL)
 307         {
 308             *space = '\0';
 309             next = (space - (char*)output) + 1;
 310         }
 311         else
 312         {
 313             next = display_columns;
 314         }
 315
 316         /* put the line on screen */
 317         rb->lcd_puts(0, lines, output);
 318
 319         /* get output count */
 320         outputted += rb->strlen(output);
 321
 322         if (outputted < len)
 323         {
 324             /* set pointer to the next part */
 325             ptr += next;
 326             lines++;
 327         }
 328         else
 329         {
 330             break;
 331         }
 332     }
 333     rb->lcd_update();
 334
 335     /* wait for keypress */
 336     while(rb->button_get(true) != LP_QUIT)
 337     {
 338         /* do nothing */
 339         /* maybe define some keys for navigation here someday. */
 340     }
 341
 342     rb->close(fIndex);
 343     rb->close(fData);
 344     return PLUGIN_OK;
 345 }