Get bytes from std::string in C++

Question

I'm working in a C++ unmanaged project.

I need to know how can I take a string like this "some data to encrypt" and get a byte[] array which I'm gonna use as the source for Encrypt.

In C# I do

  for (int i = 0; i < text.Length; i++)
    buffer[i] = (byte)text[i];

What I need to know is how to do the same but using unmanaged C++.

Thanks!

Answer 1

If you just need read-only access, then c_str() will do it:

char const *c = myString.c_str();

If you need read/write access, then you can copy the string into a vector. vectors manage dynamic memory for you. You don't have to mess with allocation/deallocation then:

std::vector<char> bytes(myString.begin(), myString.end());
bytes.push_back('');
char *c = &bytes[0];