1 /* Copyright (c) 2015-2016 The Khronos Group Inc.
2  * Copyright (c) 2015-2016 Valve Corporation
3  * Copyright (c) 2015-2016 LunarG, Inc.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  * Author: Courtney Goeltzenleuchter <courtney@LunarG.com>
18  *
19  */
20 
21 #include "string.h"
22 #include "vk_layer_extension_utils.h"
23 
24 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
25 
26 /*
27  * This file contains utility functions for layers
28  */
29 
30 VK_LAYER_EXPORT VkResult util_GetExtensionProperties(const uint32_t count, const VkExtensionProperties *layer_extensions,
31                                                      uint32_t *pCount, VkExtensionProperties *pProperties) {
32     uint32_t copy_size;
33 
34     if (pProperties == NULL || layer_extensions == NULL) {
35         *pCount = count;
36         return VK_SUCCESS;
37     }
38 
39     copy_size = *pCount < count ? *pCount : count;
40     memcpy(pProperties, layer_extensions, copy_size * sizeof(VkExtensionProperties));
41     *pCount = copy_size;
42     if (copy_size < count) {
43         return VK_INCOMPLETE;
44     }
45 
46     return VK_SUCCESS;
47 }
48 
49 VK_LAYER_EXPORT VkResult util_GetLayerProperties(const uint32_t count, const VkLayerProperties *layer_properties, uint32_t *pCount,
50                                                  VkLayerProperties *pProperties) {
51     uint32_t copy_size;
52 
53     if (pProperties == NULL || layer_properties == NULL) {
54         *pCount = count;
55         return VK_SUCCESS;
56     }
57 
58     copy_size = *pCount < count ? *pCount : count;
59     memcpy(pProperties, layer_properties, copy_size * sizeof(VkLayerProperties));
60     *pCount = copy_size;
61     if (copy_size < count) {
62         return VK_INCOMPLETE;
63     }
64 
65     return VK_SUCCESS;
66 }
67