1 files changed, 67 insertions, 0 deletions
diff --git a/src/mbgl/util/logging.cpp b/src/mbgl/util/logging.cpp
new file mode 100644
index 0000000000..939f1def64
--- /dev/null
+++ b/src/mbgl/util/logging.cpp
@@ -0,0 +1,67 @@
+#include <mbgl/util/logging.hpp>
+#include <mbgl/util/enum.hpp>
+#include <mbgl/util/thread.hpp>
+
+#include <cstdio>
+#include <cstdarg>
+#include <sstream>
+
+namespace mbgl {
+
+namespace {
+
+static std::unique_ptr<Log::Observer> currentObserver;
+
+} // namespace
+
+void Log::setObserver(std::unique_ptr<Observer> observer) {
+    currentObserver = std::move(observer);
+}
+
+std::unique_ptr<Log::Observer> Log::removeObserver() {
+    std::unique_ptr<Observer> observer;
+    std::swap(observer, currentObserver);
+    return observer;
+}
+
+void Log::record(EventSeverity severity, Event event, const std::string &msg) {
+    record(severity, event, -1, msg);
+}
+
+void Log::record(EventSeverity severity, Event event, const char* format, ...) {
+    va_list args;
+    va_start(args, format);
+    char msg[4096];
+    vsnprintf(msg, sizeof(msg), format, args);
+    va_end(args);
+
+    record(severity, event, -1, msg);
+}
+
+void Log::record(EventSeverity severity, Event event, int64_t code) {
+    record(severity, event, code, std::string());
+}
+
+void Log::record(EventSeverity severity, Event event, int64_t code, const std::string &msg) {
+    if (currentObserver && severity != EventSeverity::Debug &&
+        currentObserver->onRecord(severity, event, code, msg)) {
+        return;
+    }
+
+    std::stringstream logStream;
+
+    logStream << "{" << platform::getCurrentThreadName() << "}";
+    logStream << "[" << Enum<Event>::toString(event) << "]";
+
+    if (code >= 0) {
+        logStream << "(" << code << ")";
+    }
+
+    if (!msg.empty()) {
+        logStream << ": " << msg;
+    }
+
+    platformRecord(severity, logStream.str());
+}
+
+} // namespace mbgl