mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
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2c6939b7ac
Change type of 'surface' argument in show_glyphs to void * as it is for all other surface virtual functions. Update accordingly. Add check for endianess. Fix bug in array growing loop. (_cairo_array_append): Accept NULL for elements argument, in which case we just allocate space in the array.
134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2004 Red Hat, Inc
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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 either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is University of Southern
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* California.
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*
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* Contributor(s):
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* Kristian Høgsberg <krh@redhat.com>
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*/
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#include "cairoint.h"
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void
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_cairo_array_init (cairo_array_t *array, int element_size)
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{
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array->size = 0;
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array->num_elements = 0;
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array->element_size = element_size;
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array->elements = NULL;
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}
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void
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_cairo_array_fini (cairo_array_t *array)
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{
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free (array->elements);
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}
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cairo_status_t
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_cairo_array_grow_by (cairo_array_t *array, int additional)
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{
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char *new_elements;
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int old_size = array->size;
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int required_size = array->num_elements + additional;
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int new_size;
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if (required_size <= old_size)
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return CAIRO_STATUS_SUCCESS;
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if (old_size == 0)
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new_size = 1;
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else
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new_size = old_size * 2;
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while (new_size < required_size)
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new_size = new_size * 2;
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array->size = new_size;
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new_elements = realloc (array->elements,
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array->size * array->element_size);
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if (new_elements == NULL) {
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array->size = old_size;
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return CAIRO_STATUS_NO_MEMORY;
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}
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array->elements = new_elements;
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return CAIRO_STATUS_SUCCESS;
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}
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void
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_cairo_array_truncate (cairo_array_t *array, int num_elements)
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{
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if (num_elements < array->num_elements)
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array->num_elements = num_elements;
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}
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void *
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_cairo_array_index (cairo_array_t *array, int index)
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{
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assert (0 <= index && index < array->num_elements);
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return (void *) &array->elements[index * array->element_size];
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}
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void
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_cairo_array_copy_element (cairo_array_t *array, int index, void *dst)
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{
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memcpy (dst, _cairo_array_index (array, index), array->element_size);
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}
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void *
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_cairo_array_append (cairo_array_t *array,
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const void *elements, int num_elements)
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{
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cairo_status_t status;
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void *dest;
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status = _cairo_array_grow_by (array, num_elements);
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if (status != CAIRO_STATUS_SUCCESS)
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return NULL;
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assert (array->num_elements + num_elements <= array->size);
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dest = &array->elements[array->num_elements * array->element_size];
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array->num_elements += num_elements;
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if (elements != NULL)
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memcpy (dest, elements, num_elements * array->element_size);
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return dest;
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}
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int
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_cairo_array_num_elements (cairo_array_t *array)
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{
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return array->num_elements;
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}
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