gmap.c
1.55 KB
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2001, 2004-2005, 2007-2008, 2010-2012, 2014-2015
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/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <mailutils/errno.h>
#include <mailutils/sys/list.h>
int
mu_list_gmap (mu_list_t list, mu_list_mapper_t map, size_t nelem, void *data)
{
int rc;
struct list_data *current;
void **buf;
size_t i;
if (!list || !map || nelem == 0)
return EINVAL;
buf = calloc (nelem, sizeof (buf[0]));
if (!buf)
return ENOMEM;
i = 0;
rc = 0;
for (current = list->head.next; current != &list->head;
current = current->next)
{
buf[i++] = current->item;
if (i == nelem)
{
i = 0;
rc = map (buf, nelem, data);
if (rc)
break;
}
}
if (rc == 0 && i > 0 && i < nelem)
rc = map (buf, i, data);
free (buf);
return rc;
}