1 files changed, 73 insertions, 0 deletions
diff --git a/third_party/libwebrtc/test/scenario/column_printer.cc b/third_party/libwebrtc/test/scenario/column_printer.cc
new file mode 100644
index 0000000000..661c83bd0d
--- /dev/null
+++ b/third_party/libwebrtc/test/scenario/column_printer.cc
@@ -0,0 +1,73 @@
+/*
+ *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#include "test/scenario/column_printer.h"
+
+namespace webrtc {
+namespace test {
+
+ColumnPrinter::ColumnPrinter(const ColumnPrinter&) = default;
+ColumnPrinter::~ColumnPrinter() = default;
+
+ColumnPrinter::ColumnPrinter(
+    const char* headers,
+    std::function<void(rtc::SimpleStringBuilder&)> printer,
+    size_t max_length)
+    : headers_(headers), printer_(printer), max_length_(max_length) {}
+
+ColumnPrinter ColumnPrinter::Fixed(const char* headers, std::string fields) {
+  return ColumnPrinter(
+      headers, [fields](rtc::SimpleStringBuilder& sb) { sb << fields; },
+      fields.size());
+}
+
+ColumnPrinter ColumnPrinter::Lambda(
+    const char* headers,
+    std::function<void(rtc::SimpleStringBuilder&)> printer,
+    size_t max_length) {
+  return ColumnPrinter(headers, printer, max_length);
+}
+
+StatesPrinter::StatesPrinter(std::unique_ptr<RtcEventLogOutput> writer,
+                             std::vector<ColumnPrinter> printers)
+    : writer_(std::move(writer)), printers_(printers) {
+  RTC_CHECK(!printers_.empty());
+  for (auto& printer : printers_)
+    buffer_size_ += printer.max_length_ + 1;
+  buffer_.resize(buffer_size_);
+}
+
+StatesPrinter::~StatesPrinter() = default;
+
+void StatesPrinter::PrintHeaders() {
+  if (!writer_)
+    return;
+  writer_->Write(printers_[0].headers_);
+  for (size_t i = 1; i < printers_.size(); ++i) {
+    writer_->Write(" ");
+    writer_->Write(printers_[i].headers_);
+  }
+  writer_->Write("\n");
+}
+
+void StatesPrinter::PrintRow() {
+  // Note that this is run for null output to preserve side effects, this allows
+  // setting break points etc.
+  rtc::SimpleStringBuilder sb(buffer_);
+  printers_[0].printer_(sb);
+  for (size_t i = 1; i < printers_.size(); ++i) {
+    sb << ' ';
+    printers_[i].printer_(sb);
+  }
+  sb << "\n";
+  if (writer_)
+    writer_->Write(std::string(sb.str(), sb.size()));
+}
+}  // namespace test
+}  // namespace webrtc