1 files changed, 53 insertions, 0 deletions
diff --git a/contrib/librdns/logger.c b/contrib/librdns/logger.c
new file mode 100644
index 0000000..c9ed2d9
--- /dev/null
+++ b/contrib/librdns/logger.c
@@ -0,0 +1,53 @@
+/* Copyright (c) 2014, Vsevolod Stakhov
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *       * Redistributions of source code must retain the above copyright
+ *         notice, this list of conditions and the following disclaimer.
+ *       * 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 ''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 AUTHOR 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 <stdio.h>
+#include "dns_private.h"
+#include "logger.h"
+
+void
+rdns_logger_internal (void *log_data, enum rdns_log_level level,
+		const char *function, const char *format,
+		va_list args)
+{
+	struct rdns_resolver *resolver = log_data;
+
+	if (level <= resolver->log_level) {
+		fprintf (stderr, "rdns: %s: ", function);
+		vfprintf (stderr, format, args);
+		fprintf (stderr, "\n");
+	}
+}
+
+void rdns_logger_helper (struct rdns_resolver *resolver,
+		enum rdns_log_level level,
+		const char *function, const char *format, ...)
+{
+	va_list va;
+
+	if (resolver->logger != NULL) {
+		va_start (va, format);
+		resolver->logger (resolver->log_data, level, function, format, va);
+		va_end (va);
+	}
+}