1 /**
2 * Copyright (c) 2021-2022 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 "os/error.h"
17
18 #include <array>
19 #include <cstring>
20 #include <iosfwd>
21 #include <string>
22 #include <variant>
23
24 namespace panda::os {
25
ToString() const26 std::string Error::ToString() const
27 {
28 constexpr size_t BUFSIZE = 256;
29
30 if (std::holds_alternative<std::string>(err_)) {
31 return std::get<std::string>(err_);
32 }
33
34 int err = std::get<int>(err_);
35
36 #if (!_GNU_SOURCE && (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)) || PANDA_TARGET_MOBILE || \
37 PANDA_TARGET_MACOS || PANDA_TARGET_IOS || defined(__MUSL__)
38 std::string res;
39 res.resize(BUFSIZE);
40 strerror_r(err, res.data(), res.size());
41 #else
42 std::array<char, BUFSIZE> buf {};
43 std::string res = strerror_r(err, buf.data(), buf.size());
44 #endif
45 return res;
46 }
47
48 } // namespace panda::os
49