C++ read binary file and convert to hex

Question

I\'m having some problems reading a binary file and converting it\'s bytes to hex representation.

What I\'ve tried so far:

ifstream::pos_type size;
         


        

Answer 1

char *memblock;
… 
std::string tohexed = ToHex(memblock, true);
…

string ToHex(const string& s, bool upper_case)

There's your problem, right there. The constructor std::string::string(const char*) interprets its input as a nul-terminated string. So, only the characters leading up to '\0' are even passed to ToHex. Try one of these instead:

std::string tohexed = ToHex(std::string(memblock, memblock+size), true);
std::string tohexed = ToHex(std::string(memblock, size), true);