Roll forward to cl/338482889

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I9850950db8bd84f0904ea1a413151887f52098cf

cpp/platform/impl/g3/log_message.cc

@@ -0,0 +1,56 @@
+#include "platform/impl/g3/log_message.h"
+
+#include <algorithm>
+
+#include "base/stringprintf.h"
+
+namespace location {
+namespace nearby {
+namespace g3 {
+
+api::LogMessage::Severity g_min_log_severity = api::LogMessage::Severity::kInfo;
+
+inline absl::LogSeverity ConvertSeverity(api::LogMessage::Severity severity) {
+  switch (severity) {
+    case api::LogMessage::Severity::kInfo:
+      return absl::LogSeverity::kInfo;
+    case api::LogMessage::Severity::kWarning:
+      return absl::LogSeverity::kWarning;
+    case api::LogMessage::Severity::kError:
+      return absl::LogSeverity::kError;
+    case api::LogMessage::Severity::kFatal:
+      return absl::LogSeverity::kFatal;
+  }
+}
+
+LogMessage::LogMessage(const char* file, int line, Severity severity)
+    : log_streamer_(ConvertSeverity(severity), file, line) {}
+
+LogMessage::~LogMessage() = default;
+
+void LogMessage::Print(const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  std::string result;
+  StringAppendV(&result, format, ap);
+  log_streamer_.stream() << result;
+  va_end(ap);
+}
+
+std::ostream& LogMessage::Stream() { return log_streamer_.stream(); }
+
+}  // namespace g3
+
+namespace api {
+
+void LogMessage::SetMinLogSeverity(Severity severity) {
+  g3::g_min_log_severity = severity;
+}
+
+bool LogMessage::ShouldCreateLogMessage(Severity severity) {
+  return severity >= g3::g_min_log_severity;
+}
+
+}  // namespace api
+}  // namespace nearby
+}  // namespace location