RTCStats and RTCStatsReport added (webrtc/stats)

webrtc/stats/rtcstats.cc

+/*
+ *  Copyright 2016 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 "webrtc/api/rtcstats.h"
+
+#include "webrtc/base/stringencode.h"
+
+namespace webrtc {
+
+namespace {
+
+// Produces "{ a, b, c }". Works for non-vector |RTCStatsMemberInterface::Type|
+// types.
+template<typename T>
+std::string VectorToString(const std::vector<T>& vector) {
+  if (vector.empty())
+    return "{}";
+  std::ostringstream oss;
+  oss << "{ " << rtc::ToString<T>(vector[0]);
+  for (size_t i = 1; i < vector.size(); ++i) {
+    oss << ", " << rtc::ToString<T>(vector[i]);
+  }
+  oss << " }";
+  return oss.str();
+}
+
+// Produces "{ \"a\", \"b\", \"c\" }". Works for vectors of both const char* and
+// std::string element types.
+template<typename T>
+std::string VectorOfStringsToString(const std::vector<T>& strings) {
+  if (strings.empty())
+    return "{}";
+  std::ostringstream oss;
+  oss << "{ \"" << rtc::ToString<T>(strings[0]) << '\"';
+  for (size_t i = 1; i < strings.size(); ++i) {
+    oss << ", \"" << rtc::ToString<T>(strings[i]) << '\"';
+  }
+  oss << " }";
+  return oss.str();
+}
+
+}  // namespace
+
+std::string RTCStats::ToString() const {
+  std::ostringstream oss;
+  oss << type() << " {\n  id: \"" << id_ << "\"\n  timestamp: "
+      << timestamp_ << '\n';
+  for (const RTCStatsMemberInterface* member : Members()) {
+    oss << "  " << member->name() << ": ";
+    if (member->is_defined()) {
+      if (member->is_string())
+        oss << '"' << member->ValueToString() << "\"\n";
+      else
+        oss << member->ValueToString() << '\n';
+    } else {
+      oss << "undefined\n";
+    }
+  }
+  oss << '}';
+  return oss.str();
+}
+
+std::vector<const RTCStatsMemberInterface*> RTCStats::Members() const {
+  return MembersOfThisObjectAndAncestors(0);
+}
+
+std::vector<const RTCStatsMemberInterface*>
+RTCStats::MembersOfThisObjectAndAncestors(
+    size_t additional_capacity) const {
+  std::vector<const RTCStatsMemberInterface*> members;
+  members.reserve(additional_capacity);
+  return members;
+}
+
+#define WEBRTC_DEFINE_RTCSTATSMEMBER(T, type, is_seq, is_str, to_str)          \
+  template<>                                                                   \
+  const RTCStatsMemberInterface::Type RTCStatsMember<T>::kType =               \
+      RTCStatsMemberInterface::type;                                           \
+  template<>                                                                   \
+  bool RTCStatsMember<T>::is_sequence() const { return is_seq; }               \
+  template<>                                                                   \
+  bool RTCStatsMember<T>::is_string() const { return is_str; }                 \
+  template<>                                                                   \
+  std::string RTCStatsMember<T>::ValueToString() const {                       \
+    RTC_DCHECK(is_defined_);                                                   \
+    return to_str;                                                             \
+  }
+
+WEBRTC_DEFINE_RTCSTATSMEMBER(int32_t, kInt32, false, false,
+                             rtc::ToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(uint32_t, kUint32, false, false,
+                             rtc::ToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(int64_t, kInt64, false, false,
+                             rtc::ToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(uint64_t, kUint64, false, false,
+                             rtc::ToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(double, kDouble, false, false,
+                             rtc::ToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(const char*, kStaticString, false, true,
+                             value_);
+WEBRTC_DEFINE_RTCSTATSMEMBER(std::string, kString, false, true,
+                             value_);
+WEBRTC_DEFINE_RTCSTATSMEMBER(
+    std::vector<int32_t>, kSequenceInt32, true, false,
+    VectorToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(
+    std::vector<uint32_t>, kSequenceUint32, true, false,
+    VectorToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(
+    std::vector<int64_t>, kSequenceInt64, true, false,
+    VectorToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(
+    std::vector<uint64_t>, kSequenceUint64, true, false,
+    VectorToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(
+    std::vector<double>, kSequenceDouble, true, false,
+    VectorToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(
+    std::vector<const char*>, kSequenceStaticString, true, false,
+    VectorOfStringsToString(value_));
+WEBRTC_DEFINE_RTCSTATSMEMBER(
+    std::vector<std::string>, kSequenceString, true, false,
+    VectorOfStringsToString(value_));
+
+}  // namespace webrtc