stringstream

[Marc Schellens]

is there an easy way to clear a stringstreams contents.
My problem is that I want output to be limited to 80 characters
a line. So I use operator<< to a stringstream object 'oss' and
if tellp() is > 80, I use operator<< to output
oss.rdbuf()->str();
Afterwards I want to clear oss contents. Is there a way.
pubseekpos(0) seems not to delete the former contents.
Is there maybe a more elegant way to archieve what I want?
I find 'oss.rdbuf()->str()' already to complicated.

cout << oss; oss.clear();

would look much nicer.

thanks,
marc

[Sean]

Re: stringstream


"Marc Schellens" <m_schellens@ho tmail.com> wrote in message
news:3F00F1FA.4 000708@hotmail. com...[color=blue]
> is there an easy way to clear a stringstreams contents.
> My problem is that I want output to be limited to 80 characters
> a line. So I use operator<< to a stringstream object 'oss' and
> if tellp() is > 80, I use operator<< to output
> oss.rdbuf()->str();
> Afterwards I want to clear oss contents. Is there a way.
> pubseekpos(0) seems not to delete the former contents.
> Is there maybe a more elegant way to archieve what I want?
> I find 'oss.rdbuf()->str()' already to complicated.
>
> cout << oss; oss.clear();
>
> would look much nicer.
>
> thanks,
> marc
>[/color]

cout << oss.str() ; oss.str("")

Cheers,
Sean

[Marc Schellens]

Re: stringstream

Thanks,
thats exactly what I wanted to know.
But as we are on it:
How can I check if there is already an 'endl' inserted in an
ostringstream ?
My tries with pubseekpos(...) weren't successful so far...
Do I need a stringstream then?

thanks,
marc

Sean wrote:[color=blue]
> "Marc Schellens" <m_schellens@ho tmail.com> wrote in message
> news:3F00F1FA.4 000708@hotmail. com...
>[color=green]
>>is there an easy way to clear a stringstreams contents.
>>My problem is that I want output to be limited to 80 characters
>>a line. So I use operator<< to a stringstream object 'oss' and
>>if tellp() is > 80, I use operator<< to output
>>oss.rdbuf()->str();
>>Afterwards I want to clear oss contents. Is there a way.
>>pubseekpos( 0) seems not to delete the former contents.
>>Is there maybe a more elegant way to archieve what I want?
>>I find 'oss.rdbuf()->str()' already to complicated.
>>
>>cout << oss; oss.clear();
>>
>>would look much nicer.
>>
>>thanks,
>>marc
>>[/color]
>
>
> cout << oss.str() ; oss.str("")
>
> Cheers,
> Sean
>
>[/color]

[Sean]

Re: stringstream


"Marc Schellens" <m_schellens@ho tmail.com> wrote in message
news:3F012A94.3 000306@hotmail. com...[color=blue]
> Thanks,
> thats exactly what I wanted to know.
> But as we are on it:
> How can I check if there is already an 'endl' inserted in an
> ostringstream ?
> My tries with pubseekpos(...) weren't successful so far...
> Do I need a stringstream then?
>
> thanks,
> marc
>[/color]

Marc,

Not really sure what you are looking for but
perhaps this will help :

string ms(oss.str());
int elp = ms.find("\n");
if (elp == string::npos)
cout << ms; // no endl found
else cout << ms.substr(0,elp ); // endl found, show substring

HTH,
Sean