| // |
| // Copyright 2019 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/flags/internal/type_erased.h" |
| |
| #include "absl/base/internal/raw_logging.h" |
| #include "absl/flags/config.h" |
| #include "absl/flags/usage_config.h" |
| #include "absl/strings/str_cat.h" |
| |
| namespace absl { |
| namespace flags_internal { |
| |
| bool GetCommandLineOption(absl::string_view name, std::string* value) { |
| if (name.empty()) return false; |
| assert(value); |
| |
| CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name); |
| if (flag == nullptr || flag->IsRetired()) { |
| return false; |
| } |
| |
| *value = flag->CurrentValue(); |
| return true; |
| } |
| |
| bool GetCommandLineFlagInfo(absl::string_view name, |
| CommandLineFlagInfo* OUTPUT) { |
| if (name.empty()) return false; |
| |
| CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name); |
| if (flag == nullptr || flag->IsRetired()) { |
| return false; |
| } |
| |
| assert(OUTPUT); |
| FillCommandLineFlagInfo(flag, OUTPUT); |
| return true; |
| } |
| |
| CommandLineFlagInfo GetCommandLineFlagInfoOrDie(absl::string_view name) { |
| CommandLineFlagInfo info; |
| if (!GetCommandLineFlagInfo(name, &info)) { |
| ABSL_INTERNAL_LOG(FATAL, absl::StrCat("Flag '", name, "' does not exist")); |
| } |
| return info; |
| } |
| |
| // -------------------------------------------------------------------- |
| |
| bool SetCommandLineOption(absl::string_view name, absl::string_view value) { |
| return SetCommandLineOptionWithMode(name, value, |
| flags_internal::SET_FLAGS_VALUE); |
| } |
| |
| bool SetCommandLineOptionWithMode(absl::string_view name, |
| absl::string_view value, |
| FlagSettingMode set_mode) { |
| CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name); |
| |
| if (!flag || flag->IsRetired()) return false; |
| |
| std::string error; |
| if (!flag->SetFromString(value, set_mode, kProgrammaticChange, &error)) { |
| // Errors here are all of the form: the provided name was a recognized |
| // flag, but the value was invalid (bad type, or validation failed). |
| flags_internal::ReportUsageError(error, false); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| // -------------------------------------------------------------------- |
| |
| bool IsValidFlagValue(absl::string_view name, absl::string_view value) { |
| CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name); |
| |
| return flag != nullptr && |
| (flag->IsRetired() || flag->ValidateInputValue(value)); |
| } |
| |
| // -------------------------------------------------------------------- |
| |
| bool SpecifiedOnCommandLine(absl::string_view name) { |
| CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name); |
| if (flag != nullptr && !flag->IsRetired()) { |
| return flag->IsSpecifiedOnCommandLine(); |
| } |
| return false; |
| } |
| |
| } // namespace flags_internal |
| } // namespace absl |