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277766f55e
Bug: webrtc:13579 Change-Id: Ibc5fa7842d52321d61cc4cdd4770635af737ddff Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/267170 Reviewed-by: Björn Terelius <terelius@webrtc.org> Commit-Queue: Ali Tofigh <alito@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/main@{#37533}
65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
/*
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* Copyright 2019 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef TEST_LOGGING_LOG_WRITER_H_
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#define TEST_LOGGING_LOG_WRITER_H_
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#include <stdarg.h>
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#include <memory>
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#include <string>
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#include <utility>
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#include "absl/strings/string_view.h"
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#include "api/rtc_event_log_output.h"
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#include "rtc_base/strings/string_builder.h"
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namespace webrtc {
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template <class... Args>
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inline void LogWriteFormat(RtcEventLogOutput* out_, const char* fmt, ...) {
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va_list args, copy;
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va_start(args, fmt);
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va_copy(copy, args);
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const int predicted_length = std::vsnprintf(nullptr, 0, fmt, copy);
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va_end(copy);
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RTC_DCHECK_GE(predicted_length, 0);
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std::string out_str(predicted_length, '\0');
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if (predicted_length > 0) {
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// Pass "+ 1" to vsnprintf to include space for the '\0'.
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const int actual_length =
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std::vsnprintf(&out_str.front(), predicted_length + 1, fmt, args);
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RTC_DCHECK_GE(actual_length, 0);
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}
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va_end(args);
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out_->Write(out_str);
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}
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class LogWriterFactoryInterface {
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public:
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virtual std::unique_ptr<RtcEventLogOutput> Create(
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absl::string_view filename) = 0;
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virtual ~LogWriterFactoryInterface() = default;
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};
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class LogWriterFactoryAddPrefix : public LogWriterFactoryInterface {
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public:
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LogWriterFactoryAddPrefix(LogWriterFactoryInterface* base,
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absl::string_view prefix);
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std::unique_ptr<RtcEventLogOutput> Create(
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absl::string_view filename) override;
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private:
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LogWriterFactoryInterface* const base_factory_;
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const std::string prefix_;
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};
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} // namespace webrtc
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#endif // TEST_LOGGING_LOG_WRITER_H_
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