-int silc_file_read(int fd, unsigned char *buf, uint32 buf_len);
-int silc_file_write(int fd, const char *buffer, uint32 len);
+int silc_file_read(int fd, unsigned char *buf, SilcUInt32 buf_len);
+int silc_file_write(int fd, const char *buffer, SilcUInt32 len);