http://en.wikipedia.org/wiki/Ascii#ASCII_control_code_chart Binary Oct Dec Hex Abbr Unicode Control char C Escape code Name 0000000 000 0 00 NUL ␀ ^@ \0 Null character There’s no difference, but the more idiomatic one is ‘\0’. Putting it down as char c = 0; could mean that you intend to use it as a number (e.g. a counter). … Read more
I think the smart way is to do it simply. string str = “An example string” + char.MinValue; // Add null terminator. Then convert it into bytes to send to the server. byte[] buffer = ASCIIEncoding.ASCII.GetBytes(str); Of course what encoding you use depends on what encoding the server expects.
std::string has a constructor that takes a pair of iterators and unsigned char can be converted (in an implementation defined manner) to char so this works. There is no need for a reinterpret_cast. unsigned char u_array[4] = { ‘a’, ‘s’, ‘d’, ‘f’ }; #include <string> #include <iostream> #include <ostream> int main() { std::string str( u_array, … Read more
I solved this problem by creating an alternate string_view class called zstring_view. It’s privately inherited from string_view and contains much of its interface. The principal difference is that zstring_view cannot be created from a string_view. Also, any string_view APIs that would remove elements from the end are not part of the interface or they return … Read more
From Joel’s excellent article on the topic: Remember the way strings work in C: they consist of a bunch of bytes followed by a null character, which has the value 0. This has two obvious implications: There is no way to know where the string ends (that is, the string length) without moving through it, … Read more
What are null-terminating strings? In C, a “null-terminated string” is a tautology. A string is, by definition, a contiguous null-terminated sequence of characters (an array, or a part of an array). Other languages may address strings differently. I am only discussing C strings. How are they different from a non-null-terminated strings? There are no non-null-terminated … Read more
You have to end the string with a \0 character. That’s why they are called zero terminated strings. It is also wise to allocate 1 extra char to hold the \0.
Yes you can have embedded nulls in your std::string. Example: std::string s; s.push_back(‘\0’); s.push_back(‘a’); assert(s.length() == 2); Note: std::string‘s c_str() member will always append a null character to the returned char buffer; However, std::string‘s data() member may or may not append a null character to the returned char buffer. Be careful of operator+= One thing … Read more
The title of your question references C strings. C++ std::string objects are handled differently than standard C strings. \0 is important when using C strings, and when I use the term string in this answer, I’m referring to standard C strings. \0 acts as a string terminator in C. It is known as the null … Read more
From the horse’s mouth None of BCPL, B, or C supports character data strongly in the language; each treats strings much like vectors of integers and supplements general rules by a few conventions. In both BCPL and B a string literal denotes the address of a static area initialized with the characters of the string, … Read more