1 files changed, 58 insertions, 0 deletions
diff --git a/usr.bin/dig/lib/isc/serial.c b/usr.bin/dig/lib/isc/serial.c
new file mode 100644
index 00000000000..1783952acee
--- /dev/null
+++ b/usr.bin/dig/lib/isc/serial.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id: serial.c,v 1.1 2020/02/07 09:58:54 florian Exp $ */
+
+/*! \file */
+
+
+
+#include <isc/serial.h>
+
+isc_boolean_t
+isc_serial_lt(uint32_t a, uint32_t b) {
+	/*
+	 * Undefined => ISC_FALSE
+	 */
+	if (a == (b ^ 0x80000000U))
+		return (ISC_FALSE);
+	return (((int32_t)(a - b) < 0) ? ISC_TRUE : ISC_FALSE);
+}
+
+isc_boolean_t
+isc_serial_gt(uint32_t a, uint32_t b) {
+	return (((int32_t)(a - b) > 0) ? ISC_TRUE : ISC_FALSE);
+}
+
+isc_boolean_t
+isc_serial_le(uint32_t a, uint32_t b) {
+	return ((a == b) ? ISC_TRUE : isc_serial_lt(a, b));
+}
+
+isc_boolean_t
+isc_serial_ge(uint32_t a, uint32_t b) {
+	return ((a == b) ? ISC_TRUE : isc_serial_gt(a, b));
+}
+
+isc_boolean_t
+isc_serial_eq(uint32_t a, uint32_t b) {
+	return ((a == b) ? ISC_TRUE : ISC_FALSE);
+}
+
+isc_boolean_t
+isc_serial_ne(uint32_t a, uint32_t b) {
+	return ((a != b) ? ISC_TRUE : ISC_FALSE);
+}