Re: [Boost-users] boost filesystem

From: Aubrey, Jason (jason.aubrey_at_[hidden])
Date: 2006-10-31 14:08:57

Replies are at the end of this message:
Aubrey, Jason wrote:
> Hi,
> 
> When I run the following program it runs successfully but throws an 
> exception during shutdown.  I don't know why, but it seems that the 
> call to boost::filesystem::file_size() is corrupting memory somehow.
> This example only shows the call to file_size() but I think I've seen 
> similar trouble with other calls within boost::filesystem.
> 
> Am I doing something wrong here or is this a bug?
> 
> Regards,
> Jason Aubrey
> 
> ----------------------
> 
> Environment: 
> 	OS: Win2k
> 	Compiler: VS7.1
> 	Boost: v1.33.1
> 
> ----------------------
> 
> #include <boost/filesystem/operations.hpp> #include <fstream>
> 
> int main(int, char**)
> {
>     // Create a file
>     using namespace std;
>     const string fileName("/temp/test.txt");
>     ofstream file;
>     file.open(fileName.c_str());
>     const string message("this is a test");
>     file << message;
>     file.close();
> 
>     const boost::intmax_t fileSize =
> boost::filesystem::file_size(fileName);
> 
>     if( fileSize != message.size() )
>         throw std::exception("Bad result");
> 
>     return 0;   
> }
> 

Either I'm missing something, or...

file_size takes a path reference as its calling argument. You're passing
a string. How does this even compile?

- Rush
_______________________________________________

Thanks for the Reply Rush.

If I modify the above code to contain the following I still see the same
behavior:
        const boost::filesystem::path filePath(fileName);
        const boost::intmax_t fileSize =
boost::filesystem::file_size(filePath);

Regards,
Jason Aubrey
_______________________________________________

Would you be able to print out what the values of message.size() and
fileSize are, right before you do that comparison?

Thanks,
Lawrence Spector
_______________________________________________

Both fileSize and message.size() are 14.  The exception thrown is not a
result of the if-block, but the result of a check by the runtime when it
does its cleanup during program shutdown.

Regards,
Jason Aubrey