summaryrefslogtreecommitdiffstats
path: root/superkaramba/src/themelocale.cpp
blob: 9f77c1900045da482cb3c31340470eeffb5ee30f (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
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
/*
 * languageList from tdelocale.cpp
 *  Copyright (c) 1997,2001 Stephan Kulow <coolo@kde.org>
 *  Copyright (c) 1999 Preston Brown <pbrown@kde.org>
 *  Copyright (c) 1999-2002 Hans Petter Bieker <bieker@kde.org>
 *  Copyright (c) 2002 Lukas Tinkl <lukas@kde.org>
 *
 * libintl.cpp -- gettext related functions from glibc-2.0.5
 *  Copyright (C) 1995 Software Foundation, Inc.
 *
 * This file is part of SuperKaramba.
 *  Copyright (c) 2005 Petri Damsten <damu@iki.fi>
 *
 *  SuperKaramba is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  SuperKaramba is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with SuperKaramba; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 ****************************************************************************/
#include <config.h>

#include "themelocale.h"
#include "themefile.h"
#include <kdebug.h>
#include <tdeconfig.h>
#include <tdeglobal.h>
#include <tdelocale.h>
#include <tqbuffer.h>
#include <tqglobal.h>
#include <tqiodevice.h>
#include <stdlib.h>

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#ifndef W
# define W(flag, data) ((flag) ? SWAP (data) : (data))
#endif

typedef TQ_UINT32 nls_uint32;

struct loaded_domain
{
  const char *data;
  int must_swap;
  nls_uint32 nstrings;
  struct string_desc *orig_tab;
  struct string_desc *trans_tab;
  nls_uint32 hash_size;
  nls_uint32 *hash_tab;
};

static inline nls_uint32 SWAP (nls_uint32  i)
{
  return (i << 24) | ((i & 0xff00) << 8) | ((i >> 8) & 0xff00) | (i >> 24);
}

/* @@ end of prolog @@ */

/* The magic number of the GNU message catalog format.  */
#define _MAGIC 0x950412de
#define _MAGIC_SWAPPED 0xde120495

/* Revision number of the currently used .mo (binary) file format.  */
#define MO_REVISION_NUMBER 0


/* Defines the so called `hashpjw' function by P.J. Weinberger
   [see Aho/Sethi/Ullman, COMPILERS: Principles, Techniques and Tools,
   1986, 1987 Bell Telephone Laboratories, Inc.]  */
static inline unsigned long hash_string  (const char *__str_param);

/* @@ end of prolog @@ */

/* Header for binary .mo file format.  */
struct mo_file_header
{
  /* The magic number.  */
  nls_uint32 magic;
  /* The revision number of the file format.  */
  nls_uint32 revision;
  /* The number of strings pairs.  */
  nls_uint32 nstrings;
  /* Offset of table with start offsets of original strings.  */
  nls_uint32 orig_tab_offset;
  /* Offset of table with start offsets of translation strings.  */
  nls_uint32 trans_tab_offset;
  /* Size of hashing table.  */
  nls_uint32 hash_tab_size;
  /* Offset of first hashing entry.  */
  nls_uint32 hash_tab_offset;
};

struct string_desc
{
  /* Length of addressed string.  */
  nls_uint32 length;
  /* Offset of string in file.  */
  nls_uint32 offset;
};

void tl_nl_load_domain(TQIODevice* device, int size,
                       struct sk_kde_loaded_l10nfile *domain_file);
char* tl_nl_find_msg(const struct sk_kde_loaded_l10nfile *domain_file,
                     const char *msgid);
void tl_nl_unload_domain(struct loaded_domain *domain);

ThemeLocale::ThemeLocale(ThemeFile* theme)
  : m_theme(theme)
{
  setLanguage(languageList());
}

ThemeLocale::~ThemeLocale()
{
  unload();
}

void ThemeLocale::unload()
{
  if(m_domain.data)
  {
    tl_nl_unload_domain((struct loaded_domain *)m_domain.data);
    m_domain.data = 0;
  }
}

TQString ThemeLocale::translate(TQString text) const
{
  if(text == 0)
    return TQString();
  if(m_domain.data)
  {
    TQString result = TQString::fromUtf8(tl_nl_find_msg(&m_domain, text.ascii()));
    if(result.isEmpty())
      return text;
    else
      return result;
  }
  return text;
}

void ThemeLocale::setLanguage(const TQStringList &languages)
{
  unload();
  for(TQStringList::ConstIterator it = languages.begin();
      it != languages.end();
      ++it)
  {
    TQString file =
        TQString("locale/%1/LC_MESSAGES/%2.mo").arg(*it).arg(m_theme->mo());

    if(m_theme->fileExists(file))
    {
      TQBuffer buffer(m_theme->readThemeFile(file));
      tl_nl_load_domain(&buffer, buffer.size(), &m_domain);
      m_language = *it;
      return;
    }
  }
}

TQStringList ThemeLocale::languageList()
{
  TDEConfig* config = TDEGlobal::instance()->config();
  // Reset the list and add the new languages
  TQStringList languageList;
  languageList +=
      TQStringList::split(':', TQFile::decodeName(::getenv("TDE_LANG")));

  languageList += config->readListEntry("Language", ':');

  // same order as setlocale use
  // HPB: Only run splitLocale on the environment variables..
  TQStringList langs;

  langs << TQFile::decodeName(::getenv("LC_ALL"));
  langs << TQFile::decodeName(::getenv("LC_MESSAGES"));
  langs << TQFile::decodeName(::getenv("LANG"));

  for(TQStringList::Iterator it = langs.begin();
      it != langs.end();
      ++it )
  {
    TQString ln, ct, chrset;
    TDELocale::splitLocale(*it, ln, ct, chrset);
    /*
    We don't use these in zip themes...
    if (!ct.isEmpty())
    {
      langs.insert(it, ln + '_' + ct);
      if (!chrset.isEmpty())
        langs.insert(it, ln + '_' + ct + '.' + chrset);
    }
    */
    langs.insert(it, ln);
  }
  languageList += langs;
  // Remove empty strings
  TQStringList::Iterator end( languageList.end() );
  for(TQStringList::Iterator it=languageList.begin(); it!=end;)
  {
    if((*it).isEmpty())
      it = languageList.remove(it);
    else
      ++it;
  }
  return languageList;
}

char* tl_nl_find_msg (const struct sk_kde_loaded_l10nfile *domain_file,
                       const char *msgid)
{
  size_t top, act, bottom;
  struct loaded_domain *domain;

  if (domain_file->decided == 0)
    return NULL;

  if (domain_file->data == NULL)
    return NULL;

  domain = (struct loaded_domain *) domain_file->data;

  /* Locate the MSGID and its translation.  */
  if (domain->hash_size > 2 && domain->hash_tab != NULL)
  {
    /* Use the hashing table.  */
    nls_uint32 len = strlen (msgid);
    nls_uint32 hash_val = hash_string (msgid);
    nls_uint32 idx = hash_val % domain->hash_size;
    nls_uint32 incr = 1 + (hash_val % (domain->hash_size - 2));
    nls_uint32 nstr = W (domain->must_swap, domain->hash_tab[idx]);

    if (nstr == 0)
      /* Hash table entry is empty.  */
      return NULL;

    if (W (domain->must_swap, domain->orig_tab[nstr - 1].length) == len
        && strcmp (msgid,
                   domain->data + W (domain->must_swap,
                                     domain->orig_tab[nstr - 1].offset)) == 0)
      return (char *) domain->data + W (domain->must_swap,
    domain->trans_tab[nstr - 1].offset);

    while (1)
    {
      if (idx >= domain->hash_size - incr)
        idx -= domain->hash_size - incr;
      else
        idx += incr;

      nstr = W (domain->must_swap, domain->hash_tab[idx]);
      if (nstr == 0)
        /* Hash table entry is empty.  */
        return NULL;

      if (W (domain->must_swap, domain->orig_tab[nstr - 1].length) == len
          && strcmp (msgid,
                     domain->data + W (domain->must_swap,
                                       domain->orig_tab[nstr - 1].offset))
          == 0)
        return (char *) domain->data
            + W (domain->must_swap, domain->trans_tab[nstr - 1].offset);
    }
    /* NOTREACHED */
  }

  /* Now we try the default method:  binary search in the sorted
  array of messages.  */
  bottom = 0;
  top = domain->nstrings;
  act = top;
  while (bottom < top)
  {
    int cmp_val;

    act = (bottom + top) / 2;
    cmp_val = strcmp (msgid, domain->data
        + W (domain->must_swap,
             domain->orig_tab[act].offset));
    if (cmp_val < 0)
      top = act;
    else if (cmp_val > 0)
      bottom = act + 1;
    else
      break;
  }

  /* If an translation is found return this.  */
  return bottom >= top ? NULL : (char *) domain->data
      + W (domain->must_swap,
           domain->trans_tab[act].offset);
}

/* @@ begin of epilog @@ */
/* We assume to have `unsigned long int' value with at least 32 bits.  */
#define HASHWORDBITS 32

static inline unsigned long
hash_string (const char *str_param)
{
  unsigned long int hval, g;
  const char *str = str_param;

  /* Compute the hash value for the given string.  */
  hval = 0;
  while (*str != '\0')
  {
    hval <<= 4;
    hval += (unsigned long) *str++;
    g = hval & ((unsigned long) 0xf << (HASHWORDBITS - 4));
    if (g != 0)
    {
      hval ^= g >> (HASHWORDBITS - 8);
      hval ^= g;
    }
  }
  return hval;
}

/* Load the message catalogs specified by device.  If it is no valid
   message catalog do nothing.  */
void tl_nl_load_domain (TQIODevice* device, int size,
                         struct sk_kde_loaded_l10nfile *domain_file)
{
  struct mo_file_header *data = (struct mo_file_header *) -1;
  struct loaded_domain *domain;

  domain_file->decided = 1;
  domain_file->data = NULL;

  /* If the record does not represent a valid locale the FILENAME
  might be NULL.  This can happen when according to the given
  specification the locale file name is different for XPG and CEN
  syntax.  */
  if (device == NULL)
    return;

  /* Try to open the addressed file.  */
  if (device->open(IO_ReadOnly) == false)
    return;

  /* We must know about the size of the file.  */
  if (size < (off_t) sizeof (struct mo_file_header))
  {
    /* Something went wrong.  */
    device->close();
    return;
  }

  /* If the data is not yet available (i.e. mmap'ed) we try to load
  it manually.  */
  if (data == (struct mo_file_header *) -1)
  {
    off_t to_read;
    char *read_ptr;

    data = (struct mo_file_header *) malloc (size);
    if (data == NULL)
      return;

    to_read = size;
    read_ptr = (char *) data;
    do
    {
      long int nb = (long int) device->readBlock (read_ptr, to_read);
      if (nb == -1)
      {
        device->close();
        return;
      }

      read_ptr += nb;
      to_read -= nb;
    }
    while (to_read > 0);

    device->close();
  }

  /* Using the magic number we can test whether it really is a message
  catalog file.  */
  if (data->magic != _MAGIC && data->magic != _MAGIC_SWAPPED)
  {
    /* The magic number is wrong: not a message catalog file.  */
    free (data);
    return;
  }

  domain_file->data
        = (struct loaded_domain *) malloc (sizeof (struct loaded_domain));
  if (domain_file->data == NULL)
    return;

  domain = (struct loaded_domain *) domain_file->data;
  domain->data = (char *) data;
  domain->must_swap = data->magic != _MAGIC;

  /* Fill in the information about the available tables.  */
  switch (W (domain->must_swap, data->revision))
  {
    case 0:
      domain->nstrings = W (domain->must_swap, data->nstrings);
      domain->orig_tab = (struct string_desc *)
            ((char *) data + W (domain->must_swap,
              data->orig_tab_offset));
      domain->trans_tab = (struct string_desc *)
            ((char *) data + W (domain->must_swap,
              data->trans_tab_offset));
      domain->hash_size = W (domain->must_swap, data->hash_tab_size);
      domain->hash_tab = (nls_uint32 *)
            ((char *) data + W (domain->must_swap,
              data->hash_tab_offset));
      break;
    default:
      /* This is an illegal revision.  */
      free (data);
      free (domain);
      domain_file->data = NULL;
      return;
  }
}

void tl_nl_unload_domain (struct loaded_domain *domain)
{
  free ((void *) domain->data);
  free (domain);
}