--- /dev/null
+/*************************************************************************
+*
+* Copyright 2020 highstreet technologies GmbH and others
+*
+* 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.
+***************************************************************************/
+
+#pragma once
+
+#include <string.h>
+#include <stdbool.h>
+#include <libyang/libyang.h>
+
+void rand_init(void);
+void rand_init_fixed(unsigned int seed);
+char *rand_get_populate_value(const struct lys_type *type);
+
+// independent functions used by rand_get_populate_value
+uint8_t rand_uint8(void);
+int8_t rand_int8(void);
+uint16_t rand_uint16(void);
+int16_t rand_int16(void);
+uint32_t rand_uint32(void);
+int32_t rand_int32(void);
+uint64_t rand_uint64(void);
+int64_t rand_int64(void);
+bool rand_bool(void);
+
+//results should be freed by user
+char *rand_regex(const char *regexp);
+char *rand_mac_address(void);
+