1 files changed, 75 insertions, 0 deletions
diff --git a/src/lib/logging.cpp b/src/lib/logging.cpp
new file mode 100644
index 0000000..74c67e3
--- /dev/null
+++ b/src/lib/logging.cpp
@@ -0,0 +1,75 @@
+/*-
+ * Copyright (c) 2017-2021 Ribose Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "string.h"
+#include "logging.h"
+
+/* -1 -- not initialized
+    0 -- logging is off
+    1 -- logging is on
+*/
+static int8_t _rnp_log_switch =
+#ifdef NDEBUG
+  -1 // lazy-initialize later
+#else
+  1 // always on in debug build
+#endif
+  ;
+
+/* Temporary disable logging */
+static size_t _rnp_log_disable = 0;
+
+void
+set_rnp_log_switch(int8_t value)
+{
+    _rnp_log_switch = value;
+}
+
+bool
+rnp_log_switch()
+{
+    if (_rnp_log_switch < 0) {
+        const char *var = getenv(RNP_LOG_CONSOLE);
+        _rnp_log_switch = (var && strcmp(var, "0")) ? 1 : 0;
+    }
+    return !_rnp_log_disable && !!_rnp_log_switch;
+}
+
+void
+rnp_log_stop()
+{
+    if (_rnp_log_disable < SIZE_MAX) {
+        _rnp_log_disable++;
+    }
+}
+
+void
+rnp_log_continue()
+{
+    if (_rnp_log_disable) {
+        _rnp_log_disable--;
+    }
+}