Fix logging related issues (#4971)

PR #4907 moved the log level into the engine context, however this caused
issues with logging without the engine being initialized. This commit
reverts the log level to be a static variable.

This commit also implements missing format specifiers for jerry_log.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu

jerry-core/jrt/jrt-logging.c

@@ -0,0 +1,40 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * 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 <jrt.h>
+
+static jerry_log_level_t jerry_log_level = JERRY_LOG_LEVEL_ERROR;
+
+/**
+ * Get current log level
+ *
+ * @return log level
+ */
+jerry_log_level_t
+jerry_jrt_get_log_level (void)
+{
+  return jerry_log_level;
+} /* jerry_jrt_get_log_level */
+
+/**
+ * Set log level
+ *
+ * @param level: new log level
+ */
+void
+jerry_jrt_set_log_level (jerry_log_level_t level)
+{
+  jerry_log_level = level;
+} /* jerry_jrt_set_log_level */

jerry-core/jrt/jrt.h

@@ -117,6 +117,9 @@ void JERRY_ATTR_NORETURN jerry_unreachable (const char *file, const char *functi
  */
 void JERRY_ATTR_NORETURN jerry_fatal (jerry_fatal_code_t code);
 
+jerry_log_level_t jerry_jrt_get_log_level (void);
+void jerry_jrt_set_log_level (jerry_log_level_t level);
+
 /*
  * Logging
  */