How can I read from memory just like from a file using iostream?

Question

I have simple text file loaded into memory. I want to read from memory just like I would read from a disc like here:

ifstream file;
string line;

file.open(\         


        

Answer 1

I found a solution that works on VC++ since Nim solution works only on GCC compiler (big thanks, though. Thanks to your answer I found other answers which helped me!).

It seems that other people have similar problem too. I did exactly as here and here.

So to read from a piece of memory just like form a istream you have to do this:

class membuf : public streambuf
{
    public:
        membuf(char* p, size_t n) {
        setg(p, p, p + n);
    }
};

int main()
{
    char buffer[] = "Hello World!\nThis is next line\nThe last line";  
    membuf mb(buffer, sizeof(buffer));

    istream istr(&mb);
    string line;
    while(getline(istr, line))
    {
        cout << "line:[" << line << "]" << endl;
    }
}

EDIT: And if you have '\r\n' new lines do as Nim wrote:

if (*line.rbegin() == '\r') line.erase(line.end() - 1);

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I'm trying to treat this memory as as wistream. Does anybody know how to do this? I asked separate question for this.