summaryrefslogtreecommitdiffstats
path: root/apps/plugins/dict.c
blob: 30ba2f442ba7b3bb29db16a09965c87c43deac13 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2005 Tomas Salfischberger
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

#include "plugin.h"

PLUGIN_HEADER

/* as in hello world :) */
static struct plugin_api* rb;
/* screen info */
static int display_columns, display_lines;

/* Some lenghts */
#define WORDLEN 32 /* has to be the same in rdf2binary.c */

/* Struct packing */
#ifdef __GNUC__
#define STRUCT_PACKED __attribute__((packed))
#else
#define STRUCT_PACKED
#pragma pack (push, 2)
#endif

/* The word struct :) */
struct stWord
{
    char word[WORDLEN];
    long offset;
} STRUCT_PACKED;

/* A funtion to get width and height etc (from viewer.c) */
void init_screen(void)
{
#ifdef HAVE_LCD_BITMAP
    int w,h;

    rb->lcd_getstringsize("o", &w, &h);
    display_lines = LCD_HEIGHT / h;
    display_columns = LCD_WIDTH / w;
#else

    display_lines = 2;
    display_columns = 11;
#endif
}

/* global vars for pl_malloc() */
void *bufptr;
int bufleft;

/* simple function to "allocate" memory in pluginbuffer. */
void *pl_malloc(int size)
{
    void *ptr;
    ptr = bufptr;

    if (bufleft < size)
    {
        return NULL;
    }
    else
    {
        bufptr += size;
        return ptr;
    }
}

/* init function for pl_malloc() */
void pl_malloc_init(void)
{
    bufptr = rb->plugin_get_buffer(&bufleft);
}

/* for endian problems */
#ifdef ROCKBOX_BIG_ENDIAN
#define reverse(x) x
#else
long reverse (long N) {
    unsigned char B[4];
    B[0] = (N & 0x000000FF) >> 0;
    B[1] = (N & 0x0000FF00) >> 8;
    B[2] = (N & 0x00FF0000) >> 16;
    B[3] = (N & 0xFF000000) >> 24;
    return ((B[0] << 24) | (B[1] << 16) | (B[2] << 8) | (B[3] << 0));
}
#endif

/* Button definitions */
#if CONFIG_KEYPAD == PLAYER_PAD
#define LP_QUIT BUTTON_STOP
#elif (CONFIG_KEYPAD == IPOD_4G_PAD)
#define LP_QUIT BUTTON_MENU
#elif CONFIG_KEYPAD == IRIVER_IFP7XX_PAD
#define LP_QUIT BUTTON_PLAY
#elif CONFIG_KEYPAD == IAUDIO_X5_PAD
#define LP_QUIT BUTTON_POWER
#else
#define LP_QUIT BUTTON_OFF
#endif

/* data files */
#define DICT_INDEX ROCKBOX_DIR "/dict.index"
#define DICT_DESC ROCKBOX_DIR "/dict.desc"

/* the main plugin function */
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
    char searchword[WORDLEN]; /* word to search for */
    char *description; /* pointer to description buffer */
    char *output; /* pointer to output buffer */
    char *ptr, *space;
    struct stWord word; /* the struct to read into */
    int fIndex, fData; /* files */
    int filesize, high, low, probe;
    int lines, len, outputted, next;

    /* plugin stuff */
    (void)parameter;
    rb = api;

    /* get screen info */
    init_screen();

    /* get pl_malloc() buffer ready. */
    pl_malloc_init();

    /* init description buffer (size is because we don't have scrolling)*/
    description = (char *)pl_malloc(display_columns * display_lines);
    if (description == NULL)
    {
        DEBUGF("Err: failed to allocate description buffer.");
        return PLUGIN_ERROR;
    }

    /* init output buffer */
    output = (char *)pl_malloc(display_columns);
    if (output == NULL)
    {
        DEBUGF("Err: failed to allocate output buffer.");
        return PLUGIN_ERROR;
    }

    /* "clear" input buffer */
    searchword[0] = '\0';

    rb->kbd_input(searchword, sizeof(searchword)); /* get the word to search */

    fIndex = rb->open(DICT_INDEX, O_RDONLY); /* index file */
    if (fIndex < 0)
    {
        DEBUGF("Err: Failed to open index file.\n");
        rb->splash(HZ*2, true, "Failed to open index.");
        return PLUGIN_ERROR;
    }

    filesize = rb->filesize(fIndex); /* get filesize */

    DEBUGF("Filesize: %d bytes = %d words \n", filesize,
           (filesize / sizeof(struct stWord)));

    /* for the searching algorithm */
    high = filesize / sizeof( struct stWord );
    low = -1;

    while (high - low > 1)
    {
        probe = (high + low) / 2;

        /* Jump to word pointed by probe, and read it. */
        rb->lseek(fIndex, sizeof(struct stWord) * probe, SEEK_SET);
        rb->read(fIndex, &word, sizeof(struct stWord));

        /* jump according to the found word. */
        if (rb->strcasecmp(searchword, word.word) < 0)
        {
            high = probe;
        }
        else
        {
            low = probe;
        }
    }

    /* read in the word */
    rb->lseek(fIndex, sizeof(struct stWord) * low, SEEK_SET);
    rb->read(fIndex, &word, sizeof(struct stWord));

    /* Check if we found something */
    if (low == -1 || rb->strcasecmp(searchword, word.word) != 0)
    {
        DEBUGF("Not found.\n");
        rb->splash(HZ*2, true, "Not found.");
        rb->close(fIndex);
        return PLUGIN_OK;
    }

    DEBUGF("Found %s at offset %d\n", word.word, reverse(word.offset));

    /* now open the description file */
    fData = rb->open(DICT_DESC, O_RDONLY);
    if (fData < 0)
    {
        DEBUGF("Err: Failed to open description file.\n");
        rb->splash(HZ*2, true, "Failed to open descriptions.");
        rb->close(fIndex);
        return PLUGIN_ERROR;
    }

    /* seek to the right offset */
    rb->lseek(fData, (off_t)reverse(word.offset), SEEK_SET);

    /* Read in the description */
    rb->read_line(fData, description, display_columns * display_lines);

    /* And print it to debug. */
    DEBUGF("Description: %s\n", description);

    /* get pointer to first char */
    ptr = description;

    lines = 0;
    outputted = 0;
    len = rb->strlen(description);

    /* clear screen */
    rb->lcd_clear_display();

    /* for large screens display the searched word. */
    if(display_lines > 4)
    {
        rb->lcd_puts(0, lines, searchword);
        lines++;
    }

    /* TODO: Scroll, or just stop when there are to much lines. */
    while (1)
    {
        /* copy one lcd line */
        rb->strncpy(output, ptr, display_columns);
        output[display_columns] = '\0';

        /* typecast to kill a warning... */
        if((int)rb->strlen(ptr) < display_columns)
        {
            rb->lcd_puts(0, lines, output);
            lines++;
            break;
        }


        /* get the last spacechar */
        space = rb->strrchr(output, ' ');

        if (space != NULL)
        {
            *space = '\0';
            next = (space - (char*)output) + 1;
        }
        else
        {
            next = display_columns;
        }

        /* put the line on screen */
        rb->lcd_puts(0, lines, output);

        /* get output count */
        outputted += rb->strlen(output);

        if (outputted < len)
        {
            /* set pointer to the next part */
            ptr += next;
            lines++;
        }
        else
        {
            break;
        }
    }

#ifdef HAVE_LCD_BITMAP
    rb->lcd_update();
#endif

    /* wait for keypress */
    while(rb->button_get(true) != LP_QUIT)
    {
        /* do nothing */
        /* maybe define some keys for navigation here someday. */
    }

    rb->close(fIndex);
    rb->close(fData);
    return PLUGIN_OK;
}