Read text file into std::string.

[Jason Heyes]

Sorry, wasn't thinking. It should be:

std::stringstream ss;

ss << is.rdbuf();

now you can do whatever you want with 'ss.str()'.

Hey it works! Thanks for the neat trick.

 

[Jason Heyes]

Sorry, wasn't thinking. It should be:

std::stringstream ss;

ss << is.rdbuf();

now you can do whatever you want with 'ss.str()'.

Here in.eof() equals false:

bool read_file(std::string name, std::string &s)
{
std::ifstream in(name.c_str());
if (!in.is_open())
return false;

std::stringstream ss;
ss << in.rdbuf();

if (!in.eof())
return false;

s = ss.str();
return true;
}

When a loop is used, in.eof() equals true. Why the difference?

 

[Shezan Baig]

Here in.eof() equals false:

bool read_file(std::string name, std::string &s)
{
std::ifstream in(name.c_str());
if (!in.is_open())
return false;

std::stringstream ss;
ss << in.rdbuf();

if (!in.eof())
return false;

s = ss.str();
return true;
}

When a loop is used, in.eof() equals true. Why the difference?

Because this code reads from the filebuf, which has no notion of eof,
badbit etc. If you need to check eof or other failures, you can do it
the other way round:

is >> ss.rdbuf();

hth,
-shez-

 

[Jason Heyes]

Because this code reads from the filebuf, which has no notion of eof,
badbit etc. If you need to check eof or other failures, you can do it
the other way round:

is >> ss.rdbuf();

I tried this with the eof checking enabled. I lost all "\n\t" sequences.
Very peculiar.