LDIV(3POSIX) POSIX Programmer's Manual LDIV(3POSIX)
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of
this interface may differ (consult the corresponding Linux manual page for details of
Linux behavior), or the interface may not be implemented on Linux.
ldiv, lldiv — compute quotient and remainder of a long division
ldiv_t ldiv(long numer, long denom);
lldiv_t lldiv(long long numer, long long denom);
The functionality described on this reference page is aligned with the ISO C standard. Any
conflict between the requirements described here and the ISO C standard is unintentional.
This volume of POSIX.1‐2008 defers to the ISO C standard.
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.
The ldiv() function shall return a structure of type ldiv_t, comprising both the quotient
and the remainder. The structure shall include the following members, in any order:
long quot; /* Quotient */
long rem; /* Remainder */
The lldiv() function shall return a structure of type lldiv_t, comprising both the quo‐
tient and the remainder. The structure shall include the following members, in any order:
long long quot; /* Quotient */
long long rem; /* Remainder */
No errors are defined.
The following sections are informative.
The Base Definitions volume of POSIX.1‐2008, <stdlib.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2013 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event of any discrep‐
ancy 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.unix.org/online.html .
Any typographical or formatting errors that appear in this page are most likely to have
been introduced during the conversion of the source files to man page format. To report
such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 LDIV(3POSIX)