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//
// 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 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
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