extern void rol(uint8_t *data, const size_t len);
extern void clean_ascii(unsigned char *buf, size_t len);
+void strcleanrn(char *buf, size_t len);
+void strcreplace(char *buf, size_t len, char from, char to);
+char *strmcopy(char *buf);
extern int num_CPUs(void); // number of logical CPUs