static bool isCanonicalException(const std::ios_base::failure& ex)
{
    std::string strExplanatoryString("non-canonical ReadCompactSize()");

    return strExplanatoryString == ex.what() ||
           // OSX Apple LLVM version 5.0 (OSX 10.9) 
           strExplanatoryString + ": unspecified iostream_category error" == ex.what();
}

static bool isCanonicalException(const std::ios_base::failure &ex) {
    std::ios_base::failure expectedException("non-canonical ReadCompactSize()");

    // The string returned by what() can be different for different platforms.
    // Instead of directly comparing the ex.what() with an expected string,
    // create an instance of exception to see if ex.what() matches  the expected
    // explanatory string returned by the exception instance.
    return strcmp(expectedException.what(), ex.what()) == 0;
}

void ios_base_failure_translator(const std::ios_base::failure &exc)
{
	PyErr_SetString(PyExc_IOError, exc.what());
}

static bool isCanonicalException(const std::ios_base::failure& ex)
{
    return std::string("non-canonical ReadCompactSize()") == ex.what();
}