How to get file extension from string in C++

Question

Given a string \"filename.conf\", how to I verify the extension part?

I need a cross platform solution.

Answer 1

I used PathFindExtension() function to know whether it is a valid tif file or not.

#include 
bool A2iAWrapperUtility::isValidImageFile(string imageFile)
{
    char * pStrExtension = ::PathFindExtension(imageFile.c_str());

    if (pStrExtension != NULL && strcmp(pStrExtension, ".tif") == 0)
    {
        return true;
    }

    return false;
}