array_length.h revision 4d04a937b1bf7a949dfb00650b2640a9ed0c8aca 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _GTS_NANOAPPS_SHARED_ARRAY_LENGTH_H_
18#define _GTS_NANOAPPS_SHARED_ARRAY_LENGTH_H_
19
20#include <stddef.h>
21
22// We chose to have this at the global name scope, as this method
23// isn't exclusive to nanoapp testing, and hopefully someday will
24// move to some place more central.
25
26/**
27 * Determine the length of a statically-sized array at compile time using
28 * template trickery which makes sure we only match statically-sized arrays.
29 */
30template <typename T, size_t N>
31constexpr size_t arrayLength(T (&)[N]) { return N; }
32
33
34#endif  // _GTS_NANOAPPS_SHARED_ARRAY_LENGTH_H_
35