1/*
2 * Copyright © 2016 Red Hat.
3 * Copyright © 2016 Bas Nieuwenhuizen
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25#include <stdlib.h>
26#include <string.h>
27#include "vk_descriptors.h"
28#include "util/macros.h"
29
30static int
31binding_compare(const void* av, const void *bv)
32{
33   const VkDescriptorSetLayoutBinding *a = (const VkDescriptorSetLayoutBinding*)av;
34   const VkDescriptorSetLayoutBinding *b = (const VkDescriptorSetLayoutBinding*)bv;
35
36   return (a->binding < b->binding) ? -1 : (a->binding > b->binding) ? 1 : 0;
37}
38
39VkResult
40vk_create_sorted_bindings(const VkDescriptorSetLayoutBinding *bindings, unsigned count,
41                          VkDescriptorSetLayoutBinding **sorted_bindings)
42{
43   if (!count) {
44      *sorted_bindings = NULL;
45      return VK_SUCCESS;
46   }
47
48   *sorted_bindings = malloc(count * sizeof(VkDescriptorSetLayoutBinding));
49   if (!*sorted_bindings)
50      return VK_ERROR_OUT_OF_HOST_MEMORY;
51
52   memcpy(*sorted_bindings, bindings, count * sizeof(VkDescriptorSetLayoutBinding));
53   qsort(*sorted_bindings, count, sizeof(VkDescriptorSetLayoutBinding), binding_compare);
54
55   return VK_SUCCESS;
56}
57