1 files changed, 87 insertions, 0 deletions
diff --git a/compiler/luci/log/src/Log.cpp b/compiler/luci/log/src/Log.cpp
new file mode 100644
index 000000000..7e1634009
--- /dev/null
+++ b/compiler/luci/log/src/Log.cpp
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "luci/Log.h"
+
+#include <cassert>
+#include <cstdlib>
+#include <iostream>
+
+// TODO Extract these lexical conversion routines as a library
+namespace
+{
+
+/**
+ * @brief Convert C-string as a value of type T
+ *
+ * safecast(s, v) returns v if s is nullptr.
+ */
+template <typename T> T safecast(const char *, const T &);
+
+template <> bool safecast<bool>(const char *s, const bool &value)
+{
+  return (s == nullptr) ? value : (std::stoi(s) != 0);
+}
+
+} // namespace
+
+//
+// Logger
+//
+namespace luci
+{
+
+Logger::Logger(hermes::Context *ctx) { activate(ctx->sources(), ctx->bus()); }
+Logger::~Logger() { deactivate(); }
+
+} // namespace luci
+
+//
+// LoggerConfig
+//
+namespace luci
+{
+
+LoggerConfig::LoggerConfig()
+{
+  // Turn on logging if LUCI_LOG is set as non-zero value
+  _enabled = safecast<bool>(std::getenv("LUCI_LOG"), false);
+}
+
+void LoggerConfig::configure(const hermes::Source *source, hermes::Source::Setting &setting) const
+{
+  // Let's ignore hermes::Sources if that is not a moco logger
+  if (auto logger = dynamic_cast<const Logger *>(source))
+  {
+    configure(logger, setting);
+  }
+}
+
+void LoggerConfig::configure(const Logger *, hermes::Source::Setting &setting) const
+{
+  if (_enabled)
+  {
+    // Enable all catagories
+    setting.accept_all();
+  }
+  else
+  {
+    // Disable all catagories
+    setting.reject_all();
+  }
+}
+
+} // namespace luci