1/*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "dm_random.h"
17
18#include <random>
19
20#if defined(__LITEOS_M__)
21#include <time.h>
22#endif
23
24namespace OHOS {
25namespace DistributedHardware {
26int32_t GenRandInt(int32_t randMin, int32_t randMax)
27{
28#if defined(__LITEOS_M__)
29    srandom(time(NULL));
30    return (randMin + random() % (randMax - randMin));
31#else
32    std::random_device randDevice;
33    std::mt19937 genRand(randDevice());
34    std::uniform_int_distribution<int> disRand(randMin, randMax);
35    return disRand(genRand);
36#endif
37}
38
39int64_t GenRandLongLong(int64_t randMin, int64_t randMax)
40{
41    std::random_device randDevice;
42    std::mt19937 genRand(randDevice());
43    std::uniform_int_distribution<long long> disRand(randMin, randMax);
44    return disRand(genRand);
45}
46} // namespace DistributedHardware
47} // namespace OHOS
48