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 /* save the plugin api pointer. */
  27 static const struct plugin_api* rb;
  28 /* screen info */
  29 static int display_columns, display_lines;
  30
  31 /* Some lenghts */
  32 #define WORDLEN 32 /* has to be the same in rdf2binary.c */
  33
  34 /* Struct packing */
  35 #ifdef __GNUC__
  36 #define STRUCT_PACKED __attribute__((packed))
  37 #else
  38 #define STRUCT_PACKED
  39 #pragma pack (push, 2)
  40 #endif
  41
  42 /* The word struct :) */
  43 struct stWord
  44 {
  45     char word[WORDLEN];
  46     long offset;
  47 } STRUCT_PACKED;
  48
  49 /* A funtion to get width and height etc (from viewer.c) */
  50 void init_screen(void)
  51 {
  52 #ifdef HAVE_LCD_BITMAP
  53     int w,h;
  54
  55     rb->lcd_getstringsize("o", &w, &h);
  56     display_lines = LCD_HEIGHT / h;
  57     display_columns = LCD_WIDTH / w;
  58 #else
  59
  60     display_lines = 2;
  61     display_columns = 11;
  62 #endif
  63 }
  64
  65 /* global vars for pl_malloc() */
  66 void *bufptr;
  67 ssize_t bufleft;
  68
  69 /* simple function to "allocate" memory in pluginbuffer. */
  70 void *pl_malloc(ssize_t size)
  71 {
  72     void *ptr;
  73     ptr = bufptr;
  74
  75     if (bufleft < size)
  76     {
  77         return NULL;
  78     }
  79     else
  80     {
  81         bufptr += size;
  82         return ptr;
  83     }
  84 }
  85
  86 /* init function for pl_malloc() */
  87 void pl_malloc_init(void)
  88 {
  89     bufptr = rb->plugin_get_buffer((size_t *)&bufleft);
  90 }
  91
  92 /* for endian problems */
  93 #ifdef ROCKBOX_BIG_ENDIAN
  94 #define reverse(x) x
  95 #else
  96 long reverse (long N) {
  97     unsigned char B[4];
  98     B[0] = (N & 0x000000FF) >> 0;
  99     B[1] = (N & 0x0000FF00) >> 8;
 100     B[2] = (N & 0x00FF0000) >> 16;
 101     B[3] = (N & 0xFF000000) >> 24;
 102     return ((B[0] << 24) | (B[1] << 16) | (B[2] << 8) | (B[3] << 0));
 103 }
 104 #endif
 105
 106 /* Button definitions */
 107 #if CONFIG_KEYPAD == PLAYER_PAD
 108 #define LP_QUIT BUTTON_STOP
 109 #elif (CONFIG_KEYPAD == IPOD_4G_PAD) || \
 110       (CONFIG_KEYPAD == IPOD_3G_PAD) || \
 111       (CONFIG_KEYPAD == IPOD_1G2G_PAD)
 112 #define LP_QUIT BUTTON_MENU
 113 #elif CONFIG_KEYPAD == IRIVER_IFP7XX_PAD
 114 #define LP_QUIT BUTTON_PLAY
 115 #elif CONFIG_KEYPAD == IAUDIO_X5M5_PAD
 116 #define LP_QUIT BUTTON_POWER
 117 #elif CONFIG_KEYPAD == GIGABEAT_PAD
 118 #define LP_QUIT BUTTON_POWER
 119 #elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \
 120 (CONFIG_KEYPAD == SANSA_C200_PAD)
 121 #define LP_QUIT BUTTON_POWER
 122 #elif CONFIG_KEYPAD == IRIVER_H10_PAD
 123 #define LP_QUIT BUTTON_POWER
 124 #elif CONFIG_KEYPAD == MROBE500_PAD
 125 #define LP_QUIT BUTTON_POWER
 126 #elif CONFIG_KEYPAD == MROBE100_PAD
 127 #define LP_QUIT BUTTON_POWER
 128 #elif CONFIG_KEYPAD == GIGABEAT_S_PAD
 129 #define LP_QUIT BUTTON_BACK
 130 #elif CONFIG_KEYPAD == IAUDIO_M3_PAD
 131 #define LP_QUIT BUTTON_RC_REC
 132 #elif CONFIG_KEYPAD == COWOND2_PAD
 133 #define LP_QUIT BUTTON_POWER
 134 #else
 135 #define LP_QUIT BUTTON_OFF
 136 #endif
 137
 138 /* data files */
 139 #define DICT_INDEX ROCKBOX_DIR "/rocks/apps/dict.index"
 140 #define DICT_DESC ROCKBOX_DIR "/rocks/apps/dict.desc"
 141
 142 /* the main plugin function */
 143 enum plugin_status plugin_start(const struct plugin_api* api, const void* parameter)
 144 {
 145     char searchword[WORDLEN]; /* word to search for */
 146     char *description; /* pointer to description buffer */
 147     char *output; /* pointer to output buffer */
 148     char *ptr, *space;
 149     struct stWord word; /* the struct to read into */
 150     int fIndex, fData; /* files */
 151     int filesize, high, low, probe;
 152     int lines, len, outputted, next;
 153
 154     /* plugin stuff */
 155     (void)parameter;
 156     rb = api;
 157
 158     /* get screen info */
 159     init_screen();
 160
 161     /* get pl_malloc() buffer ready. */
 162     pl_malloc_init();
 163
 164     /* init description buffer (size is because we don't have scrolling)*/
 165     description = (char *)pl_malloc(display_columns * display_lines);
 166     if (description == NULL)
 167     {
 168         DEBUGF("Err: failed to allocate description buffer.");
 169         return PLUGIN_ERROR;
 170     }
 171
 172     /* init output buffer */
 173     output = (char *)pl_malloc(display_columns);
 174     if (output == NULL)
 175     {
 176         DEBUGF("Err: failed to allocate output buffer.");
 177         return PLUGIN_ERROR;
 178     }
 179
 180     /* "clear" input buffer */
 181     searchword[0] = '\0';
 182
 183     rb->kbd_input(searchword, sizeof(searchword)); /* get the word to search */
 184
 185     fIndex = rb->open(DICT_INDEX, O_RDONLY); /* index file */
 186     if (fIndex < 0)
 187     {
 188         DEBUGF("Err: Failed to open index file.\n");
 189         rb->splash(HZ*2, "Failed to open index.");
 190         return PLUGIN_ERROR;
 191     }
 192
 193     filesize = rb->filesize(fIndex); /* get filesize */
 194
 195     DEBUGF("Filesize: %d bytes = %d words \n", filesize,
 196            (filesize / (int)sizeof(struct stWord)));
 197
 198     /* for the searching algorithm */
 199     high = filesize / sizeof( struct stWord );
 200     low = -1;
 201
 202     while (high - low > 1)
 203     {
 204         probe = (high + low) / 2;
 205
 206         /* Jump to word pointed by probe, and read it. */
 207         rb->lseek(fIndex, sizeof(struct stWord) * probe, SEEK_SET);
 208         rb->read(fIndex, &word, sizeof(struct stWord));
 209
 210         /* jump according to the found word. */
 211         if (rb->strcasecmp(searchword, word.word) < 0)
 212         {
 213             high = probe;
 214         }
 215         else
 216         {
 217             low = probe;
 218         }
 219     }
 220
 221     /* read in the word */
 222     rb->lseek(fIndex, sizeof(struct stWord) * low, SEEK_SET);
 223     rb->read(fIndex, &word, sizeof(struct stWord));
 224
 225     /* Check if we found something */
 226     if (low == -1 || rb->strcasecmp(searchword, word.word) != 0)
 227     {
 228         DEBUGF("Not found.\n");
 229         rb->splash(HZ*2, "Not found.");
 230         rb->close(fIndex);
 231         return PLUGIN_OK;
 232     }
 233
 234     DEBUGF("Found %s at offset %ld\n", word.word, reverse(word.offset));
 235
 236     /* now open the description file */
 237     fData = rb->open(DICT_DESC, O_RDONLY);
 238     if (fData < 0)
 239     {
 240         DEBUGF("Err: Failed to open description file.\n");
 241         rb->splash(HZ*2, "Failed to open descriptions.");
 242         rb->close(fIndex);
 243         return PLUGIN_ERROR;
 244     }
 245
 246     /* seek to the right offset */
 247     rb->lseek(fData, (off_t)reverse(word.offset), SEEK_SET);
 248
 249     /* Read in the description */
 250     rb->read_line(fData, description, display_columns * display_lines);
 251
 252     /* And print it to debug. */
 253     DEBUGF("Description: %s\n", description);
 254
 255     /* get pointer to first char */
 256     ptr = description;
 257
 258     lines = 0;
 259     outputted = 0;
 260     len = rb->strlen(description);
 261
 262     /* clear screen */
 263     rb->lcd_clear_display();
 264
 265     /* for large screens display the searched word. */
 266     if(display_lines > 4)
 267     {
 268         rb->lcd_puts(0, lines, searchword);
 269         lines++;
 270     }
 271
 272     /* TODO: Scroll, or just stop when there are to much lines. */
 273     while (1)
 274     {
 275         /* copy one lcd line */
 276         rb->strncpy(output, ptr, display_columns);
 277         output[display_columns] = '\0';
 278
 279         /* typecast to kill a warning... */
 280         if((int)rb->strlen(ptr) < display_columns)
 281         {
 282             rb->lcd_puts(0, lines, output);
 283             lines++;
 284             break;
 285         }
 286
 287
 288         /* get the last spacechar */
 289         space = rb->strrchr(output, ' ');
 290
 291         if (space != NULL)
 292         {
 293             *space = '\0';
 294             next = (space - (char*)output) + 1;
 295         }
 296         else
 297         {
 298             next = display_columns;
 299         }
 300
 301         /* put the line on screen */
 302         rb->lcd_puts(0, lines, output);
 303
 304         /* get output count */
 305         outputted += rb->strlen(output);
 306
 307         if (outputted < len)
 308         {
 309             /* set pointer to the next part */
 310             ptr += next;
 311             lines++;
 312         }
 313         else
 314         {
 315             break;
 316         }
 317     }
 318     rb->lcd_update();
 319
 320     /* wait for keypress */
 321     while(rb->button_get(true) != LP_QUIT)
 322     {
 323         /* do nothing */
 324         /* maybe define some keys for navigation here someday. */
 325     }
 326
 327     rb->close(fIndex);
 328     rb->close(fData);
 329     return PLUGIN_OK;
 330 }