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/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 2004-2005, 2007, 2010-2012 Free Software Foundation,
Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Library Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <mailutils/pop3.h>
#include <mailutils/sys/pop3.h>
#include <mailutils/cctype.h>
#include <mailutils/cstr.h>
static int pop3_itr_dup (void **ptr, void *owner);
static int pop3_itr_destroy (mu_iterator_t itr, void *owner);
static int pop3_itr_first (void *owner);
static int pop3_itr_next (void *woner);
static int pop3_itr_getitem (void *owner, void **pret, const void **pkey);
static int pop3_itr_curitem_p (void *owner, void *data);
static int pop3_itr_finished_p (void *owner);
struct pop3_iterator
{
mu_pop3_t pop3;
mu_stream_t stream;
int done;
char *item;
char *rdbuf;
size_t rdsize;
};
int
mu_pop3_iterator_create (mu_pop3_t pop3, mu_iterator_t *piterator)
{
struct pop3_iterator *pop3_iterator;
mu_iterator_t iterator;
int status;
pop3_iterator = malloc (sizeof *pop3_iterator);
if (pop3_iterator == NULL)
return ENOMEM;
status = mu_pop3_stream_create (pop3, &pop3_iterator->stream);
if (status)
{
free (pop3_iterator);
return status;
}
pop3_iterator->item = NULL;
pop3_iterator->rdbuf = NULL;
pop3_iterator->rdsize = 0;
pop3_iterator->done = 0;
pop3_iterator->pop3 = pop3;
status = mu_iterator_create (&iterator, pop3_iterator);
if (status != 0)
{
free (pop3_iterator);
return status;
}
mu_iterator_set_first (iterator, pop3_itr_first);
mu_iterator_set_next (iterator, pop3_itr_next);
mu_iterator_set_getitem (iterator, pop3_itr_getitem);
mu_iterator_set_finished_p (iterator, pop3_itr_finished_p);
mu_iterator_set_curitem_p (iterator, pop3_itr_curitem_p);
mu_iterator_set_destroy (iterator, pop3_itr_destroy);
mu_iterator_set_dup (iterator, pop3_itr_dup);
*piterator = iterator;
return 0;
}
static int
pop3_itr_dup (void **ptr, void *owner)
{
struct pop3_iterator *pop3_iterator = (struct pop3_iterator *)owner;
struct pop3_iterator *clone = malloc (sizeof *pop3_iterator);
if (clone == NULL)
return ENOMEM;
/* let the assignement operator copy the elements. */
*clone = *pop3_iterator;
*ptr = clone;
return 0;
}
static int
pop3_itr_destroy (mu_iterator_t iterator, void *owner)
{
struct pop3_iterator *pop3_iterator = (struct pop3_iterator *)owner;
/* Delicate situation if they did not finish to drain the result
We take the approach to do it for the user. FIXME: Not sure
if this is the rigth thing to do. The other way is to close the stream */
if (!pop3_iterator->done)
{
char buf[128];
size_t n = 0;
mu_stream_t str = pop3_iterator->pop3->carrier;
while (mu_stream_readline (str, buf, sizeof buf, &n) > 0
&& n > 0)
n = 0;
}
if (pop3_iterator->item)
free (pop3_iterator->item);
if (pop3_iterator->rdbuf)
free (pop3_iterator->rdbuf);
pop3_iterator->pop3->state = MU_POP3_NO_STATE;
free (pop3_iterator);
return 0;
}
static int
pop3_itr_first (void *data)
{
return pop3_itr_next (data);
}
static int
pop3_itr_next (void *owner)
{
struct pop3_iterator *pop3_iterator = (struct pop3_iterator *)owner;
int status = 0;
size_t n;
status = mu_stream_getline (pop3_iterator->stream, &pop3_iterator->rdbuf,
&pop3_iterator->rdsize, &n);
if (status || n == 0)
{
pop3_iterator->done = 1;
pop3_iterator->pop3->state = MU_POP3_NO_STATE;
return 0;
}
n = mu_rtrim_class (pop3_iterator->rdbuf, MU_CTYPE_SPACE);
if (n == 1 && pop3_iterator->rdbuf[0] == '.')
{
pop3_iterator->done = 1;
pop3_iterator->pop3->state = MU_POP3_NO_STATE;
}
else
pop3_iterator->item = pop3_iterator->rdbuf;
return status;
}
static int
pop3_itr_getitem (void *owner, void **item, const void **pkey)
{
struct pop3_iterator *pop3_iterator = (struct pop3_iterator *)owner;
if (item)
{
*((char **)item) = pop3_iterator->item;
pop3_iterator->item = NULL;
}
if (pkey)
*pkey = NULL;
return 0;
}
static int
pop3_itr_finished_p (void *owner)
{
struct pop3_iterator *pop3_iterator = (struct pop3_iterator *)owner;
return pop3_iterator->done;
}
static int
pop3_itr_curitem_p (void *owner, void *item)
{
struct pop3_iterator *pop3_iterator = (struct pop3_iterator *)owner;
return *((char **)item) == pop3_iterator->item;
}
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