summaryrefslogtreecommitdiff
path: root/libmu_scm/mu_mailbox.c
blob: f58fbad9ef40378e13b3b469a1d9353750e7990b (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
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 1999, 2000, 2001, 2006, 2007, 2010 Free Software
   Foundation, Inc.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.

   This library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General
   Public License along with this library; if not, write to the
   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301 USA */

#include "mu_scm.h"
#include <mailutils/iterator.h>

static scm_t_bits mailbox_tag;

/* NOTE: Maybe will have to add some more members. That's why it is a
   struct, not just a typedef mu_mailbox_t */
struct mu_mailbox
{
  mu_mailbox_t mbox;       /* Mailbox */
  mu_iterator_t itr;
  int noclose;
};

/* SMOB functions: */
static SCM
mu_scm_mailbox_mark (SCM mailbox_smob)
{
  return SCM_BOOL_F;
}

static scm_sizet
mu_scm_mailbox_free (SCM mailbox_smob)
{
  struct mu_mailbox *mum = (struct mu_mailbox *) SCM_CDR (mailbox_smob);

  mu_iterator_destroy (&mum->itr);
  
  if (!mum->noclose)
    {
      mu_mailbox_close (mum->mbox);
      mu_mailbox_destroy (&mum->mbox);
    }
  free (mum);
  /* NOTE: Currently there is no way for this function to return the
     amount of memory *actually freed* by mu_mailbox_destroy */
  return sizeof (struct mu_mailbox);
}

static int
mu_scm_mailbox_print (SCM mailbox_smob, SCM port, scm_print_state * pstate)
{
  struct mu_mailbox *mum = (struct mu_mailbox *) SCM_CDR (mailbox_smob);
  size_t count = 0;
  mu_url_t url = NULL;

  mu_mailbox_messages_count (mum->mbox, &count);
  mu_mailbox_get_url (mum->mbox, &url);

  scm_puts ("#<mailbox ", port);

  if (mailbox_smob == SCM_BOOL_F)
    {
      /* mu_mailbox.* functions may return #f */
      scm_puts ("#f", port);
    }
  else
    {
      const char *p = mu_url_to_string (url);
      if (p)
	{
	  char buf[64];
	  
	  scm_puts (p, port);
	  
	  snprintf (buf, sizeof (buf), " (%d)", count);
	  scm_puts (buf, port);
	}
      else
	scm_puts ("uninitialized", port);
    }
  scm_puts (">", port);

  return 1;
}

/* Internal functions */

/* There are two C interfaces for creating mailboxes in Scheme.
   The first one, mu_scm_mailbox_create0, allows to set `noclose'
   bit, which disables closing and releasing the underlying mu_mailbox_t
   after the hosting SCM object is freed. Use this, if this mailbox
   is referenced elsewhere.

   Another one, mu_scm_mailbox_create, always create an object that
   will cause closing the mu_mailbox_t object and releasing its memory
   after the hosting SCM object is swept away by GC. This is the only
   official one.

   The mu_scm_mailbox_create0 function is a kludge, needed because
   mu_mailbox_t objects don't have reference counters. When it is fixed in
   the library, the interface will be removed. */

SCM
mu_scm_mailbox_create0 (mu_mailbox_t mbox, int noclose)
{
  struct mu_mailbox *mum;

  mum = scm_gc_malloc (sizeof (struct mu_mailbox), "mailbox");
  mum->mbox = mbox;
  mum->itr = NULL;
  mum->noclose = noclose;
  SCM_RETURN_NEWSMOB (mailbox_tag, mum);
}

SCM
mu_scm_mailbox_create (mu_mailbox_t mbox)
{
  return mu_scm_mailbox_create0 (mbox, 0);
}

int
mu_scm_is_mailbox (SCM scm)
{
  return SCM_NIMP (scm) && (long) SCM_CAR (scm) == mailbox_tag;
}

/* ************************************************************************* */
/* Guile primitives */

SCM_DEFINE_PUBLIC (scm_mu_mail_directory, "mu-mail-directory", 0, 1, 0,
	    (SCM URL), 
"Do not use this function. Use mu-user-mailbox-url instead.")
#define FUNC_NAME s_scm_mu_mail_directory
{
  mu_scm_error (FUNC_NAME, ENOSYS,
		"This function is deprecated. Use mu-user-mailbox-url instead.",
		  scm_list_1 (URL));
  return SCM_EOL;
}
#undef FUNC_NAME 

SCM_DEFINE_PUBLIC (scm_mu_user_mailbox_url, "mu-user-mailbox-url", 1, 0, 0, 
	    (SCM USER),
	    "")
#define FUNC_NAME s_scm_mu_user_mailbox_url
{
  int rc;
  char *p, *str;
  SCM ret;
  
  SCM_ASSERT (scm_is_string (USER), USER, SCM_ARG1, FUNC_NAME);
  str = scm_to_locale_string (USER);
  rc = mu_construct_user_mailbox_url (&p, str);
  free (str);
  if (rc)
    mu_scm_error (FUNC_NAME, rc,
		  "Cannot construct mailbox URL for ~A",
		  scm_list_1 (USER));
  ret = scm_from_locale_string (p);
  free (p);
  return ret;
}
#undef FUNC_NAME 

SCM_DEFINE_PUBLIC (scm_mu_folder_directory, "mu-folder-directory", 0, 1, 0,
	    (SCM URL), 
"If URL is given, sets it as a name of the user's folder directory.\n"
"Returns the current value of the folder directory.")
#define FUNC_NAME s_scm_mu_folder_directory
{
  if (!SCM_UNBNDP (URL))
    {
      char *s;

      SCM_ASSERT (scm_is_string (URL), URL, SCM_ARG1, FUNC_NAME);
      s = scm_to_locale_string (URL);
      mu_set_folder_directory (s);
      free (s);
    }
  return scm_from_locale_string (mu_folder_directory ());
}
#undef FUNC_NAME 

SCM_DEFINE_PUBLIC (scm_mu_mailbox_open, "mu-mailbox-open", 2, 0, 0,
	    (SCM URL, SCM MODE), 
"Opens the mailbox specified by URL. MODE is a string, consisting of\n"
"the characters described below, giving the access mode for the mailbox\n"
"\n"
"@multitable @columnfractions 0.20 0.70\n"
"@headitem MODE @tab Meaning\n"
"@item r @tab Open for reading.\n"
"@item w @tab Open for writing.\n"
"@item a @tab Open for appending to the end of the mailbox.\n"
"@item c @tab Create the mailbox if it does not exist.\n"
"@end multitable\n"
)
#define FUNC_NAME s_scm_mu_mailbox_open
{
  mu_mailbox_t mbox = NULL;
  char *mode_str;
  int mode = 0;
  int status;
  SCM ret;
  
  SCM_ASSERT (scm_is_string (URL), URL, SCM_ARG1, FUNC_NAME);
  SCM_ASSERT (scm_is_string (MODE), MODE, SCM_ARG2, FUNC_NAME);
  
  scm_dynwind_begin (0);
  
  mode_str = scm_to_locale_string (MODE);
  scm_dynwind_free (mode_str);
  for (; *mode_str; mode_str++)
    switch (*mode_str)
      {
      case 'r':
	mode |= MU_STREAM_READ;
	break;
      case 'w':
	mode |= MU_STREAM_WRITE;
	break;
      case 'a':
	mode |= MU_STREAM_APPEND;
	break;
      case 'c':
	mode |= MU_STREAM_CREAT;
	break;
      }
  
  if (mode & MU_STREAM_READ && mode & MU_STREAM_WRITE)
    mode = (mode & ~(MU_STREAM_READ | MU_STREAM_WRITE)) | MU_STREAM_RDWR;

  mode_str = scm_to_locale_string (URL);
  scm_dynwind_free (mode_str);
  
  status = mu_mailbox_create_default (&mbox, mode_str);
  if (status)
    mu_scm_error (FUNC_NAME, status,
		  "Cannot create default mailbox ~A",
		  scm_list_1 (URL));


  status = mu_mailbox_open (mbox, mode);
  if (status)
    {
      mu_mailbox_destroy (&mbox);
      mu_scm_error (FUNC_NAME, status,
		    "Cannot open default mailbox ~A",
		    scm_list_1 (URL));
    }
  ret = mu_scm_mailbox_create (mbox);
  scm_dynwind_end ();
  return ret;
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC (scm_mu_mailbox_close, "mu-mailbox-close", 1, 0, 0,
	    (SCM MBOX), "Closes mailbox MBOX.")
#define FUNC_NAME s_scm_mu_mailbox_close
{
  struct mu_mailbox *mum;

  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  mum = (struct mu_mailbox *) SCM_CDR (MBOX);
  mu_mailbox_close (mum->mbox);
  mu_mailbox_destroy (&mum->mbox);
  return SCM_UNSPECIFIED;
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC (scm_mu_mailbox_get_url, "mu-mailbox-get-url", 1, 0, 0,
	    (SCM MBOX), 
            "Returns url of the mailbox MBOX.")
#define FUNC_NAME s_scm_mu_mailbox_get_url
{
  struct mu_mailbox *mum;
  mu_url_t url;
  int status;
 
  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  mum = (struct mu_mailbox *) SCM_CDR (MBOX);
  status = mu_mailbox_get_url (mum->mbox, &url);
  if (status)
    mu_scm_error (FUNC_NAME, status,
                  "Cannot get mailbox url",
                  SCM_BOOL_F);

  return scm_from_locale_string (mu_url_to_string (url));
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC (scm_mu_mailbox_get_port, "mu-mailbox-get-port", 2, 0, 0,
	    (SCM MBOX, SCM MODE),
"Returns a port associated with the contents of the MBOX.\n"
"MODE is a string defining operation mode of the stream. It may\n"
"contain any of the two characters: @samp{r} for reading, @samp{w} for\n"
"writing.\n")
#define FUNC_NAME s_scm_mu_mailbox_get_port
{
  struct mu_mailbox *mum;
  mu_stream_t stream;
  int status;
  char *s;
  SCM ret;
  
  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  SCM_ASSERT (scm_is_string (MODE), MODE, SCM_ARG2, FUNC_NAME);
  mum = (struct mu_mailbox *) SCM_CDR (MBOX);
  status = mu_mailbox_get_stream (mum->mbox, &stream);
  if (status)
    mu_scm_error (FUNC_NAME, status,
		  "Cannot get mailbox stream",
		  scm_list_1 (MBOX));
  s = scm_to_locale_string (MODE);
  ret = mu_port_make_from_stream (MBOX, stream, scm_mode_bits (s));
  free (s);
  return ret;
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC (scm_mu_mailbox_get_message, "mu-mailbox-get-message", 2, 0, 0,
            (SCM MBOX, SCM MSGNO), 
"Retrieve from message #MSGNO from the mailbox MBOX.")
#define FUNC_NAME s_scm_mu_mailbox_get_message
{
  size_t msgno;
  struct mu_mailbox *mum;
  mu_message_t msg;
  int status;
    
  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  SCM_ASSERT (scm_is_integer (MSGNO), MSGNO, SCM_ARG2, FUNC_NAME);

  mum = (struct mu_mailbox *) SCM_CDR (MBOX);
  msgno = scm_to_int32 (MSGNO);

  status = mu_mailbox_get_message (mum->mbox, msgno, &msg);
  if (status)
    mu_scm_error (FUNC_NAME, status,
		  "Cannot get message ~A from mailbox ~A",
		  scm_list_2 (MSGNO, MBOX));
    
  return mu_scm_message_create (MBOX, msg);
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC (scm_mu_mailbox_messages_count, "mu-mailbox-messages-count", 1, 0, 0,
	    (SCM MBOX), 
"Returns number of messages in the mailbox MBOX.")
#define FUNC_NAME s_scm_mu_mailbox_messages_count
{
  struct mu_mailbox *mum;
  size_t nmesg;
  int status;
  
  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  mum = (struct mu_mailbox *) SCM_CDR (MBOX);

  status = mu_mailbox_messages_count (mum->mbox, &nmesg);
  if (status)
    mu_scm_error (FUNC_NAME, status,
		  "Cannot count messages in mailbox ~A",
		  scm_list_1 (MBOX));
  return scm_from_size_t (nmesg);
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC (scm_mu_mailbox_expunge, "mu-mailbox-expunge", 1, 0, 0,
	    (SCM MBOX), 
"Expunges deleted messages from the mailbox MBOX.")
#define FUNC_NAME s_scm_mu_mailbox_expunge
{
  struct mu_mailbox *mum;
  int status;
    
  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  mum = (struct mu_mailbox *) SCM_CDR (MBOX);
  status = mu_mailbox_expunge (mum->mbox);
  if (status)
    mu_scm_error (FUNC_NAME, status,
		  "Cannot expunge messages in mailbox ~A",
		  scm_list_1 (MBOX));
  return SCM_BOOL_T;
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC (scm_mu_mailbox_append_message, "mu-mailbox-append-message", 2, 0, 0,
	    (SCM MBOX, SCM MESG),
"Appends message MESG to the mailbox MBOX.")
#define FUNC_NAME s_scm_mu_mailbox_append_message
{
  struct mu_mailbox *mum;
  mu_message_t msg;
  int status;
    
  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  SCM_ASSERT (mu_scm_is_message (MESG), MESG, SCM_ARG2, FUNC_NAME);
  mum = (struct mu_mailbox *) SCM_CDR (MBOX);
  msg = mu_scm_message_get (MESG);
  status = mu_mailbox_append_message (mum->mbox, msg);
  if (status)
    mu_scm_error (FUNC_NAME, status,
		  "Cannot append message ~A to mailbox ~A",
		  scm_list_2 (MESG, MBOX));
  return SCM_BOOL_T;
}
#undef FUNC_NAME

/* Iterations */
#define ITROP(op, descr)			\
  do						\
    {						\
      int status = op;				\
      if (status == MU_ERR_NOENT)		\
	return SCM_EOF_VAL;			\
      if (status)				\
	mu_scm_error (FUNC_NAME, status,	\
		      "~A: " descr ": ~A",	\
		      scm_list_2 (MBOX,		\
				  scm_from_locale_string (mu_strerror (status)))); \
    }									\
  while (0)

SCM_DEFINE_PUBLIC (scm_mu_mailbox_first_message, "mu-mailbox-first-message", 1, 0, 0,
	    (SCM MBOX),
	    "Returns first message from the mailbox.")
#define FUNC_NAME s_scm_mu_mailbox_first_message
{
  struct mu_mailbox *mum;
  int status;
  mu_message_t msg;
  
  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  mum = (struct mu_mailbox *) SCM_CDR (MBOX);
  if (!mum->itr)
    {
      status = mu_mailbox_get_iterator (mum->mbox, &mum->itr);
      if (status)
	mu_scm_error (FUNC_NAME, status,
		      "~A: cannot create iterator: ~A",
		      scm_list_2 (MBOX,
				  scm_from_locale_string (mu_strerror (status))));
    }
  ITROP (mu_iterator_first (mum->itr), "moving to the first message");
  ITROP (mu_iterator_current (mum->itr, (void**)&msg),
	 "getting current message");
  return mu_scm_message_create (MBOX, msg);
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC (scm_mu_mailbox_next_message, "mu-mailbox-next-message", 1, 0, 0,
	    (SCM MBOX),
	    "Returns next message from the mailbox.")
#define FUNC_NAME s_scm_mu_mailbox_next_message
{
  struct mu_mailbox *mum;
  int status;
  mu_message_t msg;
  
  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  mum = (struct mu_mailbox *) SCM_CDR (MBOX);
  if (!mum->itr)
    {
      status = mu_mailbox_get_iterator (mum->mbox, &mum->itr);
      if (status)
	mu_scm_error (FUNC_NAME, status,
		      "~A: cannot create iterator: ~A",
		      scm_list_2 (MBOX,
				  scm_from_locale_string (mu_strerror (status))));
      ITROP (mu_iterator_first (mum->itr), "moving to the first message");
    }
  else
    ITROP (mu_iterator_next (mum->itr), "advancing iterator");
  
  ITROP (mu_iterator_current (mum->itr, (void**)&msg),
	 "getting current message");
  return mu_scm_message_create (MBOX, msg);
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC (scm_mu_mailbox_more_messages_p, "mu-mailbox-more-messages?", 1, 0, 0,
	    (SCM MBOX),
	    "Returns next message from the mailbox.")
#define FUNC_NAME s_scm_mu_mailbox_more_messages_p
{
  struct mu_mailbox *mum;
  int status;
  
  SCM_ASSERT (mu_scm_is_mailbox (MBOX), MBOX, SCM_ARG1, FUNC_NAME);
  mum = (struct mu_mailbox *) SCM_CDR (MBOX);
  if (!mum->itr)
    {
      status = mu_mailbox_get_iterator (mum->mbox, &mum->itr);
      if (status)
	mu_scm_error (FUNC_NAME, status,
		      "~A: cannot create iterator: ~A",
		      scm_list_2 (MBOX,
				  scm_from_locale_string (mu_strerror (status))));
      status = mu_iterator_first (mum->itr);
      if (status == MU_ERR_NOENT)
	return SCM_BOOL_F;
      if (status)
	mu_scm_error (FUNC_NAME, status,
		      "~A: cannot set iterator to the first message: ~A",
		      scm_list_2 (MBOX,
				  scm_from_locale_string (mu_strerror (status))));
    }
  return scm_from_bool (!!mu_iterator_is_done (mum->itr));
}
#undef FUNC_NAME

/* Initialize the module */
void
mu_scm_mailbox_init ()
{
  mailbox_tag = scm_make_smob_type ("mailbox", sizeof (struct mu_mailbox));
  scm_set_smob_mark (mailbox_tag, mu_scm_mailbox_mark);
  scm_set_smob_free (mailbox_tag, mu_scm_mailbox_free);
  scm_set_smob_print (mailbox_tag, mu_scm_mailbox_print);

#include "mu_mailbox.x"

}

Return to:

Send suggestions and report system problems to the System administrator.