Printable View
I am building a web server. And some of the data that will be tramsitted back to the browser are images. From what I understand, images have embedded zeros in them.
Can I use the string class to handle it? Or do I need some kind of byte stream? Or a simple char array?
You can use a string (actually only a char array), but you can't treat it as a string. You will have to store the length, and you can't use string functions like strcpy instead use memcpy.
You can use std::string to hold binary data, including embedded nulls. The member functions to use to store data in a std::string is std::string::assign().
To return a pointer to the binary data, the member function to use is std::string::data().
Regards,
Paul McKenzie
Would you recommend using std::string for this purpose? I am
having a little trouble getting my head around streams and
memory buffers
I've stored binary data in std::string's (images and binary file data), and have had no problems.Quote:
Originally posted by souldog
Would you recommend using std::string for this purpose? I am
having a little trouble getting my head around streams and
memory buffers
Regards,
Paul McKenzie
Quote:
Originally posted by Paul McKenzie
You can use std::string to hold binary data, including embedded nulls. The member functions to use to store data in a std::string is std::string::assign().
To return a pointer to the binary data, the member function to use is std::string::data().
Regards,
Paul McKenzie
Great, I was hoping I could use std::string. Thank you
You can also use std::vector<char> or std::vector<unsigned char>. It's got most of the same methods as std::string but does not try to append a nul to the end.
-rick