These functions shall compute the quotient and remainder of the division of the
numerator numer by the denominator denom. If the division is
inexact, the resulting quotient is the long integer (for the
ldiv() function) or long long integer (for the lldiv()
function) of lesser magnitude that is the nearest to the algebraic quotient.
If the result cannot be represented, the behavior is undefined; otherwise,
quot * denom+rem shall equal numer.
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html