diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/base/internal/strerror.cc')
-rw-r--r-- | third_party/abseil_cpp/absl/base/internal/strerror.cc | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/third_party/abseil_cpp/absl/base/internal/strerror.cc b/third_party/abseil_cpp/absl/base/internal/strerror.cc deleted file mode 100644 index d66ba1201135..000000000000 --- a/third_party/abseil_cpp/absl/base/internal/strerror.cc +++ /dev/null @@ -1,88 +0,0 @@ -// Copyright 2020 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/base/internal/strerror.h" - -#include <array> -#include <cerrno> -#include <cstddef> -#include <cstdio> -#include <cstring> -#include <string> -#include <type_traits> - -#include "absl/base/internal/errno_saver.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace base_internal { -namespace { - -const char* StrErrorAdaptor(int errnum, char* buf, size_t buflen) { -#if defined(_WIN32) - int rc = strerror_s(buf, buflen, errnum); - buf[buflen - 1] = '\0'; // guarantee NUL termination - if (rc == 0 && strncmp(buf, "Unknown error", buflen) == 0) *buf = '\0'; - return buf; -#else - // The type of `ret` is platform-specific; both of these branches must compile - // either way but only one will execute on any given platform: - auto ret = strerror_r(errnum, buf, buflen); - if (std::is_same<decltype(ret), int>::value) { - // XSI `strerror_r`; `ret` is `int`: - if (ret) *buf = '\0'; - return buf; - } else { - // GNU `strerror_r`; `ret` is `char *`: - return reinterpret_cast<const char*>(ret); - } -#endif -} - -std::string StrErrorInternal(int errnum) { - absl::base_internal::ErrnoSaver errno_saver; - char buf[100]; - const char* str = StrErrorAdaptor(errnum, buf, sizeof buf); - if (*str == '\0') { - snprintf(buf, sizeof buf, "Unknown error %d", errnum); - str = buf; - } - return str; -} - -// kSysNerr is the number of errors from a recent glibc. `StrError()` falls back -// to `StrErrorAdaptor()` if the value is larger than this. -constexpr int kSysNerr = 135; - -std::array<std::string, kSysNerr>* NewStrErrorTable() { - auto* table = new std::array<std::string, kSysNerr>; - for (int i = 0; i < static_cast<int>(table->size()); ++i) { - (*table)[i] = StrErrorInternal(i); - } - return table; -} - -} // namespace - -std::string StrError(int errnum) { - static const auto* table = NewStrErrorTable(); - if (errnum >= 0 && errnum < static_cast<int>(table->size())) { - return (*table)[errnum]; - } - return StrErrorInternal(errnum); -} - -} // namespace base_internal -ABSL_NAMESPACE_END -} // namespace absl |