I am implementing file saving functionality within a Qt application using C++.
I am looking for a way to check to see if the selected file already exists before writing to it, so that I can prompt a warning to the user.
I am using an std::ofstream
and I am not looking for a Boost solution.
This is one of my favorite tuck-away functions I keep on hand for multiple uses.
#include <sys/stat.h>
// Function: fileExists
/**
Check if a file exists
@param[in] filename - the name of the file to check
@return true if the file exists, else false
*/
bool fileExists(const std::string& filename)
{
struct stat buf;
if (stat(filename.c_str(), &buf) != -1)
{
return true;
}
return false;
}
I find this much more tasteful than trying to open a file if you have no immediate intentions of using it for I/O.