1 /*
2 * Copyright (c) 2021 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 <cerrno>
19 #include <cstring>
20
21 #include <array>
22
23 namespace panda::os {
24
ToString() const25 std::string Error::ToString() const
26 {
27 if (std::holds_alternative<std::string>(err_)) {
28 return std::get<std::string>(err_);
29 }
30
31 constexpr size_t BUFSIZE = 256;
32 int err = std::get<int>(err_);
33
34 #if (!_GNU_SOURCE && (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)) || PANDA_TARGET_MOBILE || \
35 PANDA_TARGET_MACOS || defined(__MUSL__)
36 std::string res;
37 res.resize(BUFSIZE);
38 strerror_r(err, res.data(), res.size());
39 #else
40 std::array<char, BUFSIZE> buf {};
41 std::string res = strerror_r(err, buf.data(), buf.size());
42 #endif
43
44 return res;
45 }
46
47 } // namespace panda::os
48