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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/sys/nntp.h>
#include <mailutils/iterator.h>
static int nntp_itr_dup (void **ptr, void *owner);
static int nntp_itr_destroy (mu_iterator_t itr, void *owner);
static int nntp_itr_first (void *owner);
static int nntp_itr_next (void *woner);
static int nntp_itr_getitem (void *owner, void **pret, const void **pkey);
static int nntp_itr_curitem_p (void *owner, void *data);
static int nntp_itr_finished_p (void *owner);
struct nntp_iterator
{
mu_nntp_t nntp;
int done;
char *item;
};
int
mu_nntp_iterator_create (mu_nntp_t nntp, mu_iterator_t *piterator)
{
struct nntp_iterator *nntp_iterator;
mu_iterator_t iterator;
int status;
nntp_iterator = malloc (sizeof *nntp_iterator);
if (nntp_iterator == NULL)
return ENOMEM;
nntp_iterator->item = NULL;
nntp_iterator->done = 0;
nntp_iterator->nntp= nntp;
status = mu_iterator_create (&iterator, nntp_iterator);
if (status != 0)
{
free (nntp_iterator);
return status;
}
mu_iterator_set_first (iterator, nntp_itr_first);
mu_iterator_set_next (iterator, nntp_itr_next);
mu_iterator_set_getitem (iterator, nntp_itr_getitem);
mu_iterator_set_finished_p (iterator, nntp_itr_finished_p);
mu_iterator_set_curitem_p (iterator, nntp_itr_curitem_p);
mu_iterator_set_destroy (iterator, nntp_itr_destroy);
mu_iterator_set_dup (iterator, nntp_itr_dup);
*piterator = iterator;
return 0;
}
static int
nntp_itr_dup (void **ptr, void *owner)
{
struct nntp_iterator *nntp_iterator = (struct nntp_iterator *)owner;
struct nntp_iterator *clone = malloc (sizeof *nntp_iterator);
if (clone == NULL)
return ENOMEM;
/* let the assignement operator copy the elements. */
*clone = *nntp_iterator;
*ptr = clone;
return 0;
}
static int
nntp_itr_destroy (mu_iterator_t iterator, void *owner)
{
struct nntp_iterator *nntp_iterator = (struct nntp_iterator *)owner;
/* Delicate situation if they did not finish to drain the result
We take te 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 (!nntp_iterator->done)
{
char buf[128];
size_t n = 0;
while (mu_nntp_readline (nntp_iterator->nntp, buf, sizeof buf, &n) > 0 && n > 0)
n = 0;
}
if (nntp_iterator->item)
free (nntp_iterator->item);
nntp_iterator->nntp->state = MU_NNTP_NO_STATE;
free (nntp_iterator);
return 0;
}
static int
nntp_itr_first (void *data)
{
return nntp_itr_next (data);
}
static int
nntp_itr_next (void *owner)
{
struct nntp_iterator *nntp_iterator = (struct nntp_iterator *)owner;
size_t n = 0;
int status = 0;
if (!nntp_iterator->done)
{
/* The first readline will not consume the buffer, we just need to
know how much to read. */
status = mu_nntp_readline (nntp_iterator->nntp, NULL, 0, &n);
if (status == 0)
{
if (n)
{
char *buf;
buf = calloc (n + 1, 1);
if (buf)
{
/* Consume. */
mu_nntp_readline (nntp_iterator->nntp, buf, n + 1, NULL);
if (buf[n - 1] == '\n')
buf[n - 1] = '\0';
if (nntp_iterator->item)
free (nntp_iterator->item);
nntp_iterator->item = buf;
}
else
status = ENOMEM;
}
else
{
nntp_iterator->done = 1;
nntp_iterator->nntp->state = MU_NNTP_NO_STATE;
}
}
}
return status;
}
static int
nntp_itr_getitem (void *owner, void **item, const void **pkey)
{
struct nntp_iterator *nntp_iterator = (struct nntp_iterator *)owner;
if (item)
{
*((char **)item) = nntp_iterator->item;
nntp_iterator->item = NULL;
}
if (pkey)
*pkey = NULL;
return 0;
}
static int
nntp_itr_finished_p (void *owner)
{
struct nntp_iterator *nntp_iterator = (struct nntp_iterator *)owner;
return nntp_iterator->done;
}
static int
nntp_itr_curitem_p (void *owner, void *item)
{
struct nntp_iterator *nntp_iterator = (struct nntp_iterator *)owner;
return *((char **)item) == nntp_iterator->item;
}
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