Function format

runtime/Util.cc:34–42

A safe version of sprintf.

/// A safe version of sprintf.
std::string
format(const char* format, ...)
{
    va_list ap;
    va_start(ap, format);
    string s = vformat(format, ap);
    va_end(ap);
    return s;
}

/// A safe version of vprintf.
string