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diff --git a/src/common/file-utils.h b/src/common/file-utils.h
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+/*
+ * Copyright (c) 2019-2020, [Ribose Inc](https://www.ribose.com).
+ * 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 OWNER 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.
+ */
+
+#ifndef RNP_FILE_UTILS_H_
+#define RNP_FILE_UTILS_H_
+
+#include <stdint.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <string>
+
+bool    rnp_file_exists(const char *path);
+bool    rnp_dir_exists(const char *path);
+int64_t rnp_filemtime(const char *path);
+int     rnp_open(const char *filename, int oflag, int pmode);
+FILE *  rnp_fopen(const char *filename, const char *mode);
+FILE *  rnp_fdopen(int fildes, const char *mode);
+int     rnp_access(const char *path, int mode);
+int     rnp_stat(const char *filename, struct stat *statbuf);
+int     rnp_rename(const char *oldpath, const char *newpath);
+int     rnp_unlink(const char *path);
+
+#ifdef _WIN32
+#define rnp_closedir _wclosedir
+int         rnp_mkdir(const char *path);
+_WDIR *     rnp_opendir(const char *path);
+std::string rnp_readdir_name(_WDIR *dir);
+#else
+#define rnp_closedir closedir
+DIR *       rnp_opendir(const char *path);
+std::string rnp_readdir_name(DIR *dir);
+#endif
+#ifdef _WIN32
+#define RNP_MKDIR(pathname, mode) rnp_mkdir(pathname)
+#else
+#define RNP_MKDIR(pathname, mode) mkdir(pathname, mode)
+#endif
+
+#ifdef _MSC_VER
+#define R_OK 4 /* Test for read permission.  */
+#define W_OK 2 /* Test for write permission.  */
+#define F_OK 0 /* Test for existence.  */
+#endif
+
+/** @private
+ *  generate a temporary file name based on TMPL.  TMPL must match the
+ *  rules for mk[s]temp (i.e. end in "XXXXXX").  The name constructed
+ *  does not exist at the time of the call to mkstemp.  TMPL is
+ *  overwritten with the result.get the list item at specified index
+ *
+ *  @param tmpl filename template
+ *  @return file descriptor of newly created and opened file, or -1 on error
+ **/
+int rnp_mkstemp(char *tmpl);
+
+namespace rnp {
+namespace path {
+inline char separator();
+bool        exists(const std::string &path, bool is_dir = false);
+bool        empty(const std::string &path);
+std::string HOME(const std::string &sdir = "");
+std::string append(const std::string &path, const std::string &name);
+} // namespace path
+} // namespace rnp
+
+#endif