hdritr.c
3.35 KB
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2008, 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, see
<http://www.gnu.org/licenses/>. */
/* Mail header iterators. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <mailutils/sys/header.h>
#include <mailutils/errno.h>
struct header_iterator
{
mu_header_t header;
size_t index;
};
static int
hdr_first (void *owner)
{
struct header_iterator *itr = owner;
itr->index = 1;
return 0;
}
static int
hdr_next (void *owner)
{
struct header_iterator *itr = owner;
itr->index++;
return 0;
}
static int
hdr_getitem (void *owner, void **pret, const void **pkey)
{
struct header_iterator *itr = owner;
int rc;
size_t count;
rc = mu_header_get_field_count (itr->header, &count);
if (rc)
return rc;
if (itr->index > count)
return MU_ERR_NOENT;
rc = mu_header_sget_field_name (itr->header, itr->index,
(const char**) pkey);
if (rc == 0)
{
if (pkey)
rc = mu_header_sget_field_value (itr->header, itr->index,
(const char**) pret);
}
return rc;
}
static int
hdr_finished_p (void *owner)
{
struct header_iterator *itr = owner;
size_t count;
if (mu_header_get_field_count (itr->header, &count))
return 1;
return itr->index > count;
}
static int
hdr_destroy (mu_iterator_t iterator, void *data)
{
struct header_iterator *itr = data;
mu_iterator_detach (&itr->header->itr, iterator);
free (data);
return 0;
}
static int
hdr_curitem_p (void *owner, void *item)
{
void *ptr;
if (hdr_getitem (owner, &ptr, NULL))
return 0;
return ptr == item;
}
static int
hdr_data_dup (void **ptr, void *owner)
{
struct header_iterator *itr = owner;
*ptr = malloc (sizeof (struct header_iterator));
if (*ptr == NULL)
return ENOMEM;
memcpy (*ptr, owner, sizeof (struct header_iterator));
mu_iterator_attach (&itr->header->itr, *ptr);
return 0;
}
int
mu_header_get_iterator (mu_header_t hdr, mu_iterator_t *piterator)
{
mu_iterator_t iterator;
int status;
struct header_iterator *itr;
if (!hdr)
return EINVAL;
itr = calloc (1, sizeof *itr);
if (!itr)
return ENOMEM;
itr->header = hdr;
itr->index = 1;
status = mu_iterator_create (&iterator, itr);
if (status)
{
free (itr);
return status;
}
mu_iterator_set_first (iterator, hdr_first);
mu_iterator_set_next (iterator, hdr_next);
mu_iterator_set_getitem (iterator, hdr_getitem);
mu_iterator_set_finished_p (iterator, hdr_finished_p);
mu_iterator_set_curitem_p (iterator, hdr_curitem_p);
mu_iterator_set_destroy (iterator, hdr_destroy);
mu_iterator_set_dup (iterator, hdr_data_dup);
mu_iterator_attach (&hdr->itr, iterator);
*piterator = iterator;
return 0;
}