void * _cbor_realloc_multiple(void *pointer, size_t item_size, size_t item_count)
Overflow-proof contiguous array reallocation. 
void * _cbor_alloc_multiple(size_t item_size, size_t item_count)
Overflow-proof contiguous array allocation. 
size_t _cbor_highest_bit(size_t number)
Highest on bit position. 
bool _cbor_safe_to_multiply(size_t a, size_t b)
Can a and b be multiplied without overflowing size_t?