fbCombineConjointOutPart (CARD8 a, CARD8 b)
{
    /* max (1-b/a,0) */
    /* = 1-min(b/a,1) */

    /* min (1, (1-b) / a) */

    if (b >= a)		    /* b >= a -> b/a >= 1 */
	return 0x00;	    /* 0 */
    return ~FbIntDiv(b,a);   /* 1 - b/a */
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.