Code improvements / Fix warnings

- Fix CodeQL warnings
- Port lots of improvements/fixes from PR #225
- replace 'array_hexstr' and '%*H' format by sdk function 'format_hex'
- Add 'noreturn' attribute in 'main.c'

src/uint_common.h

@@ -21,6 +21,9 @@
 #define _UINT_COMMON_H_
 
 #include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include "format.h"
 
 #define UPPER_P(x) x->elements[0]
 #define LOWER_P(x) x->elements[1]
@@ -32,4 +35,6 @@ void read_u64_be(const uint8_t *const in, uint64_t *const out);
 uint64_t readUint64BE(const uint8_t *const buffer);
 void reverseString(char *const str, uint32_t length);
 
+int bytes_to_string(char *out, size_t outl, const void *value, size_t len);
+
 #endif  //_UINT_COMMON_H_