C++: const char * to stringstream

Question

Is it possible to put a const char* into a string stream?

I think it's possible with the write() function in stringstream but I'm having trouble figuring out how to get the streamsize if i only know of the const char *.

Assuming size is my const char * variable:

stringstream s;
s.write(temp,size);

How do I get size? Thanks.

Answer 1

I tested it, and it works correctly...

#include <iostream>
#include <sstream>

using namespace std;

int main()
{
    stringstream s;
    const char* token = "HELLO";
    s << token;
    cout << s.str() << endl;
    return 0;
}

[facu@arch ~]$ g++ p.cpp 
[facu@arch ~]$ ./a.out 
HELLO

Answer 2

I may not be understanding correctly, but I think you're asking how to get the size of a char* string. To do that, all you need is strlen(str) which is in the <cstring> header. The string must be null terminated, though.

Answer 3

I don't know if it is the best way to answer your question, but see:

std::string _getline_ ( const char *str, const unsigned int ui_size )
{
    std::string tmp;
    unsigned short int flag = 0;
    while ( flag < 2 )
    {
    if( *str != '\0' )
    {
        tmp.push_back( *str );
        flag = 0;
    }
    else
    {
        tmp.push_back( ' ' );
        flag++;
    }
    str++;  
    }
    return tmp;
}

The problem is that "flag" will store two of "\\0" no more... I don't know what is your proposite.. But i hope it will be useful for you... Maybe someone wanna fix it...