93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2012 Jef Driesen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "context-private.h"
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#include "iterator-private.h"
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dc_iterator_t *
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dc_iterator_allocate (dc_context_t *context, const dc_iterator_vtable_t *vtable)
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{
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dc_iterator_t *iterator = NULL;
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assert(vtable != NULL);
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assert(vtable->size >= sizeof(dc_iterator_t));
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// Allocate memory.
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iterator = (dc_iterator_t *) malloc (vtable->size);
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if (iterator == NULL) {
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ERROR (context, "Failed to allocate memory.");
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return iterator;
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}
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iterator->vtable = vtable;
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iterator->context = context;
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return iterator;
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}
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void
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dc_iterator_deallocate (dc_iterator_t *iterator)
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{
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free (iterator);
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}
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int
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dc_iterator_isinstance (dc_iterator_t *iterator, const dc_iterator_vtable_t *vtable)
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{
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if (iterator == NULL)
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return 0;
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return iterator->vtable == vtable;
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}
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dc_status_t
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dc_iterator_next (dc_iterator_t *iterator, void *item)
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{
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if (iterator == NULL || iterator->vtable->next == NULL)
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return DC_STATUS_UNSUPPORTED;
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if (item == NULL)
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return DC_STATUS_INVALIDARGS;
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return iterator->vtable->next (iterator, item);
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}
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dc_status_t
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dc_iterator_free (dc_iterator_t *iterator)
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{
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dc_status_t status = DC_STATUS_SUCCESS;
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if (iterator == NULL)
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return DC_STATUS_SUCCESS;
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if (iterator->vtable->free) {
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status = iterator->vtable->free (iterator);
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}
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dc_iterator_deallocate (iterator);
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return status;
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}
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