Abseil Common Libraries (C++) (grcp 依赖)
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112 lines
3.4 KiB
112 lines
3.4 KiB
// |
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// Copyright 2022 The Abseil Authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#include "absl/log/internal/flags.h" |
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#include <stddef.h> |
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#include <algorithm> |
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#include <cstdlib> |
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#include <string> |
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#include "absl/base/attributes.h" |
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#include "absl/base/config.h" |
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#include "absl/base/log_severity.h" |
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#include "absl/flags/flag.h" |
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#include "absl/flags/marshalling.h" |
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#include "absl/log/globals.h" |
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#include "absl/log/internal/config.h" |
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#include "absl/strings/numbers.h" |
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#include "absl/strings/string_view.h" |
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namespace absl { |
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ABSL_NAMESPACE_BEGIN |
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namespace log_internal { |
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namespace { |
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void SyncLoggingFlags() { |
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absl::SetFlag(&FLAGS_minloglevel, static_cast<int>(absl::MinLogLevel())); |
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absl::SetFlag(&FLAGS_log_prefix, absl::ShouldPrependLogPrefix()); |
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} |
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bool RegisterSyncLoggingFlags() { |
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log_internal::SetLoggingGlobalsListener(&SyncLoggingFlags); |
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return true; |
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} |
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ABSL_ATTRIBUTE_UNUSED const bool unused = RegisterSyncLoggingFlags(); |
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template <typename T> |
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T GetFromEnv(const char* varname, T dflt) { |
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const char* val = ::getenv(varname); |
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if (val != nullptr) { |
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std::string err; |
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ABSL_INTERNAL_CHECK(absl::ParseFlag(val, &dflt, &err), err.c_str()); |
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} |
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return dflt; |
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} |
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constexpr absl::LogSeverityAtLeast StderrThresholdDefault() { |
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return absl::LogSeverityAtLeast::kError; |
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} |
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} // namespace |
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} // namespace log_internal |
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ABSL_NAMESPACE_END |
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} // namespace absl |
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ABSL_FLAG(int, stderrthreshold, |
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static_cast<int>(absl::log_internal::StderrThresholdDefault()), |
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"Log messages at or above this threshold level are copied to stderr.") |
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.OnUpdate([] { |
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absl::log_internal::RawSetStderrThreshold( |
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static_cast<absl::LogSeverityAtLeast>( |
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absl::GetFlag(FLAGS_stderrthreshold))); |
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}); |
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ABSL_FLAG(int, minloglevel, static_cast<int>(absl::LogSeverityAtLeast::kInfo), |
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"Messages logged at a lower level than this don't actually " |
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"get logged anywhere") |
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.OnUpdate([] { |
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absl::log_internal::RawSetMinLogLevel( |
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static_cast<absl::LogSeverityAtLeast>( |
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absl::GetFlag(FLAGS_minloglevel))); |
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}); |
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ABSL_FLAG(std::string, log_backtrace_at, "", |
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"Emit a backtrace when logging at file:linenum.") |
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.OnUpdate([] { |
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const std::string log_backtrace_at = |
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absl::GetFlag(FLAGS_log_backtrace_at); |
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if (log_backtrace_at.empty()) return; |
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const size_t last_colon = log_backtrace_at.rfind(':'); |
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if (last_colon == log_backtrace_at.npos) return; |
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const absl::string_view file = |
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absl::string_view(log_backtrace_at).substr(0, last_colon); |
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int line; |
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if (absl::SimpleAtoi( |
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absl::string_view(log_backtrace_at).substr(last_colon + 1), |
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&line)) { |
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absl::SetLogBacktraceLocation(file, line); |
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} |
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}); |
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ABSL_FLAG(bool, log_prefix, true, |
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"Prepend the log prefix to the start of each log line") |
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.OnUpdate([] { |
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absl::log_internal::RawEnableLogPrefix(absl::GetFlag(FLAGS_log_prefix)); |
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});
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