iterator.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 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 2, 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <mailutils/sys/iterator.h>
#include <mailutils/error.h>
void
iterator_destroy (iterator_t *piterator)
{
if (piterator && *piterator)
{
iterator_t iterator = *piterator;
if (iterator->vtable && iterator->vtable->destroy)
iterator->vtable->destroy (piterator);
*piterator = NULL;
}
}
int
iterator_first (iterator_t iterator)
{
if (iterator == NULL || iterator->vtable == NULL
|| iterator->vtable->first == NULL)
return MU_ERROR_NOT_SUPPORTED;
return iterator->vtable->first (iterator);
}
int
iterator_next (iterator_t iterator)
{
if (iterator == NULL || iterator->vtable == NULL
|| iterator->vtable->next == NULL)
return MU_ERROR_NOT_SUPPORTED;
return iterator->vtable->next (iterator);
}
int
iterator_current (iterator_t iterator, void *pitem)
{
if (iterator == NULL || iterator->vtable == NULL
|| iterator->vtable->current == NULL)
return MU_ERROR_NOT_SUPPORTED;
return iterator->vtable->current (iterator, pitem);
}
int
iterator_is_done (iterator_t iterator)
{
if (iterator == NULL || iterator->vtable == NULL
|| iterator->vtable->is_done == NULL)
return MU_ERROR_NOT_SUPPORTED;
return iterator->vtable->is_done (iterator);
}