int int_to_string(char * buffer, size_t length, int number, int base)
{
    if (base >= 2 && base <= 16)
    {
        int i = 0;
        int buffint = 0;
        const char * Digits = "0123456789ABCDEF";
        char * revBuffer = "";
        if (number < 0)
        {
            number = -number;
            buffer[0] = '-';
            i = 1;
            buffint = 1;
        }
        for (i = i; number > 0; i++)
        {
            revBuffer[i] = Digits[number % base];
            number /= base;
        }
        for (buffint = buffint; buffint <= i; buffint++)
        {
            buffer[buffint] = revBuffer[i-buffint];
        }
        return i;
    }
    return -1;
}