Re: [Mingw-users] ostringstream - what am I missing??

[Luke D. <cod...@ho...>]

----- Original Message ----- 
From: "Zodiaq" <zo...@as...>
To: <min...@li...>
Sent: Thursday, August 07, 2003 9:09 AM
Subject: [Mingw-users] ostringstream - what am I missing??


> Hello All MinGW users,
>
>   there is some very strange for me going on about
> std::ostringstream... in my project I wanted to use it rathen than
> sticking with sprintf(stdio) or wsprintf(from windows.h or any
> included from it)... but when I want to use first sooner or later my
> program crashes... my program is composed of main window which using
> tab control shows three different dialogs... each of them may launch
> own thread to do some job for it... the problems starts when one of
> them receives some info which is visualised like this:
> #include <sstream>
> std::ostringstream some_text;//1:
> some_text.str( "" ); //2:to clear
> //and then for example:
> some_text << "Info: " << some_integer << std::ends;
> //to set text in some control (i.e. edittext control) is use:
> SendMessage( some_handle, WM_SETTEXT, 0, reinterpret_cast<LPARAM>(
> some_text.str( ).data( )));

I think you need to use "some_text.str().c_str()" instead, because the
string returned by data() may not have a null-terminator.

Luke

> after few such operation program crashes at some_text (1:)definition... I
> don't know where I made a mistake, I've forgot something as I have the
> same problems under VC++... I know that when I use sprintf programs
> works perfectly without any problems for as long as I want... does
> anyone know where I made mistake?? What am I missing? This is very
> annoying for me...
>
> btw by using sprintf I mean:
> #include <stdio.h>
> char some_text[ 50 ]; //size depends on where I want to use it
> sprintf( some_text, "blablabla %d", some_int );
> SendMessage( some_handle, WM_SETTEXT, 0, reinterpret_cast<LPARAM>(
> some_text ));
> -- 
> regards, Zodiaq