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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2004 Red Hat, Inc
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is University of Southern
* California.
*
* Contributor(s):
* Kristian Høgsberg <krh@redhat.com>
*/
#include "cairoint.h"
void
_cairo_array_init (cairo_array_t *array, int element_size)
{
array->size = 0;
array->num_elements = 0;
array->element_size = element_size;
array->elements = NULL;
}
void
_cairo_array_fini (cairo_array_t *array)
{
free (array->elements);
}
cairo_status_t
_cairo_array_grow_by (cairo_array_t *array, int additional)
{
char *new_elements;
int old_size = array->size;
int required_size = array->num_elements + additional;
int new_size;
if (required_size <= old_size)
return CAIRO_STATUS_SUCCESS;
if (old_size == 0)
new_size = 1;
else
new_size = old_size * 2;
while (new_size < required_size)
new_size = new_size * 2;
array->size = new_size;
new_elements = realloc (array->elements,
array->size * array->element_size);
if (new_elements == NULL) {
array->size = old_size;
return CAIRO_STATUS_NO_MEMORY;
}
array->elements = new_elements;
return CAIRO_STATUS_SUCCESS;
}
void
_cairo_array_truncate (cairo_array_t *array, int num_elements)
{
if (num_elements < array->num_elements)
array->num_elements = num_elements;
}
void *
_cairo_array_index (cairo_array_t *array, int index)
{
assert (0 <= index && index < array->num_elements);
return (void *) &array->elements[index * array->element_size];
}
void
_cairo_array_copy_element (cairo_array_t *array, int index, void *dst)
{
memcpy (dst, _cairo_array_index (array, index), array->element_size);
}
void *
_cairo_array_append (cairo_array_t *array,
const void *elements, int num_elements)
{
cairo_status_t status;
void *dest;
status = _cairo_array_grow_by (array, num_elements);
if (status != CAIRO_STATUS_SUCCESS)
return NULL;
assert (array->num_elements + num_elements <= array->size);
dest = &array->elements[array->num_elements * array->element_size];
array->num_elements += num_elements;
if (elements != NULL)
memcpy (dest, elements, num_elements * array->element_size);
return dest;
}
int
_cairo_array_num_elements (cairo_array_t *array)
{
return array->num_elements;
}
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