SunStudio 11 C++ std::stringstream stream pointer problem

Example program to demonstrate that the stream pointer for

std::stringstream streams is not always set correctly after writing

a char array to the stream.

Problem is present in SunStudio 11:

Sun C++ 5.8 Patch 121017-04 2006/08/02

No special compile options, standard C++ library

[code]

#include <string>

#include <sstream>

#include <iostream>

int main( int argc, char *argv[] )

{

std::stringstream os;

char cbuf[1000];

for ( int i=0;i<sizeof(cbuf);i++) cbuf[i]='a';

// Write contents of char array to the stringstream. The stream

// pointer is not incremented. The flush() call doesn't help.

os.write(cbuf, sizeof(cbuf));

os.flush();

std::cout ><< "Position after char* write is wrong: " \

<< os.tellp() << std::endl;

// After appending to the stringstream the stream pointer is

// now correct.

os << "A";

std::cout << "Position after std::string append is ok: " \

<< os.tellp() << std::endl;

return 0;

}

[/code]

[1158 byte] By [Colin.McDonald] at [2007-11-26 10:26:35]