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 == COWOND2_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 == ONDAVX747_PAD
 144 #define LP_QUIT BUTTON_POWER
 145 #else
 146 #define LP_QUIT BUTTON_OFF
 147 #endif
 148
 149 /* data files */
 150 #define DICT_INDEX ROCKBOX_DIR "/rocks/apps/dict.index"
 151 #define DICT_DESC ROCKBOX_DIR "/rocks/apps/dict.desc"
 152
 153 /* the main plugin function */
 154 enum plugin_status plugin_start(const void* parameter)
 155 {
 156     char searchword[WORDLEN]; /* word to search for */
 157     char *description; /* pointer to description buffer */
 158     char *output; /* pointer to output buffer */
 159     char *ptr, *space;
 160     struct stWord word; /* the struct to read into */
 161     int fIndex, fData; /* files */
 162     int filesize, high, low, probe;
 163     int lines, len, outputted, next;
 164
 165     /* plugin stuff */
 166     (void)parameter;
 167
 168     /* get screen info */
 169     init_screen();
 170
 171     /* get pl_malloc() buffer ready. */
 172     pl_malloc_init();
 173
 174     /* init description buffer (size is because we don't have scrolling)*/
 175     description = (char *)pl_malloc(display_columns * display_lines);
 176     if (description == NULL)
 177     {
 178         DEBUGF("Err: failed to allocate description buffer.");
 179         return PLUGIN_ERROR;
 180     }
 181
 182     /* init output buffer */
 183     output = (char *)pl_malloc(display_columns);
 184     if (output == NULL)
 185     {
 186         DEBUGF("Err: failed to allocate output buffer.");
 187         return PLUGIN_ERROR;
 188     }
 189
 190     /* "clear" input buffer */
 191     searchword[0] = '\0';
 192
 193     rb->kbd_input(searchword, sizeof(searchword)); /* get the word to search */
 194
 195     fIndex = rb->open(DICT_INDEX, O_RDONLY); /* index file */
 196     if (fIndex < 0)
 197     {
 198         DEBUGF("Err: Failed to open index file.\n");
 199         rb->splash(HZ*2, "Failed to open index.");
 200         return PLUGIN_ERROR;
 201     }
 202
 203     filesize = rb->filesize(fIndex); /* get filesize */
 204
 205     DEBUGF("Filesize: %d bytes = %d words \n", filesize,
 206            (filesize / (int)sizeof(struct stWord)));
 207
 208     /* for the searching algorithm */
 209     high = filesize / sizeof( struct stWord );
 210     low = -1;
 211
 212     while (high - low > 1)
 213     {
 214         probe = (high + low) / 2;
 215
 216         /* Jump to word pointed by probe, and read it. */
 217         rb->lseek(fIndex, sizeof(struct stWord) * probe, SEEK_SET);
 218         rb->read(fIndex, &word, sizeof(struct stWord));
 219
 220         /* jump according to the found word. */
 221         if (rb->strcasecmp(searchword, word.word) < 0)
 222         {
 223             high = probe;
 224         }
 225         else
 226         {
 227             low = probe;
 228         }
 229     }
 230
 231     /* read in the word */
 232     rb->lseek(fIndex, sizeof(struct stWord) * low, SEEK_SET);
 233     rb->read(fIndex, &word, sizeof(struct stWord));
 234
 235     /* Check if we found something */
 236     if (low == -1 || rb->strcasecmp(searchword, word.word) != 0)
 237     {
 238         DEBUGF("Not found.\n");
 239         rb->splash(HZ*2, "Not found.");
 240         rb->close(fIndex);
 241         return PLUGIN_OK;
 242     }
 243
 244     DEBUGF("Found %s at offset %ld\n", word.word, reverse(word.offset));
 245
 246     /* now open the description file */
 247     fData = rb->open(DICT_DESC, O_RDONLY);
 248     if (fData < 0)
 249     {
 250         DEBUGF("Err: Failed to open description file.\n");
 251         rb->splash(HZ*2, "Failed to open descriptions.");
 252         rb->close(fIndex);
 253         return PLUGIN_ERROR;
 254     }
 255
 256     /* seek to the right offset */
 257     rb->lseek(fData, (off_t)reverse(word.offset), SEEK_SET);
 258
 259     /* Read in the description */
 260     rb->read_line(fData, description, display_columns * display_lines);
 261
 262     /* And print it to debug. */
 263     DEBUGF("Description: %s\n", description);
 264
 265     /* get pointer to first char */
 266     ptr = description;
 267
 268     lines = 0;
 269     outputted = 0;
 270     len = rb->strlen(description);
 271
 272     /* clear screen */
 273     rb->lcd_clear_display();
 274
 275     /* for large screens display the searched word. */
 276     if(display_lines > 4)
 277     {
 278         rb->lcd_puts(0, lines, searchword);
 279         lines++;
 280     }
 281
 282     /* TODO: Scroll, or just stop when there are to much lines. */
 283     while (1)
 284     {
 285         /* copy one lcd line */
 286         rb->strncpy(output, ptr, display_columns);
 287         output[display_columns] = '\0';
 288
 289         /* typecast to kill a warning... */
 290         if((int)rb->strlen(ptr) < display_columns)
 291         {
 292             rb->lcd_puts(0, lines, output);
 293             lines++;
 294             break;
 295         }
 296
 297
 298         /* get the last spacechar */
 299         space = rb->strrchr(output, ' ');
 300
 301         if (space != NULL)
 302         {
 303             *space = '\0';
 304             next = (space - (char*)output) + 1;
 305         }
 306         else
 307         {
 308             next = display_columns;
 309         }
 310
 311         /* put the line on screen */
 312         rb->lcd_puts(0, lines, output);
 313
 314         /* get output count */
 315         outputted += rb->strlen(output);
 316
 317         if (outputted < len)
 318         {
 319             /* set pointer to the next part */
 320             ptr += next;
 321             lines++;
 322         }
 323         else
 324         {
 325             break;
 326         }
 327     }
 328     rb->lcd_update();
 329
 330     /* wait for keypress */
 331     while(rb->button_get(true) != LP_QUIT)
 332     {
 333         /* do nothing */
 334         /* maybe define some keys for navigation here someday. */
 335     }
 336
 337     rb->close(fIndex);
 338     rb->close(fData);
 339     return PLUGIN_OK;
 340 }