| .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| .\" |
| .\" %%%LICENSE_START(VERBATIM) |
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| .\" Permission is granted to copy and distribute modified versions of this |
| .\" manual under the conditions for verbatim copying, provided that the |
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| .\" permission notice identical to this one. |
| .\" |
| .\" Since the Linux kernel and libraries are constantly changing, this |
| .\" manual page may be incorrect or out-of-date. The author(s) assume no |
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| .\" References consulted: |
| .\" Linux libc source code |
| .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) |
| .\" 386BSD man pages |
| .\" |
| .\" Modified 1993-03-29, David Metcalfe |
| .\" Modified 1993-07-24, Rik Faith (faith@cs.unc.edu) |
| .\" Modified 2002-08-10, 2003-11-01 Walter Harms, aeb |
| .\" |
| .TH DIV 3 2016-03-15 "" "Linux Programmer's Manual" |
| .SH NAME |
| div, ldiv, lldiv, imaxdiv \- compute quotient and remainder of |
| an integer division |
| .SH SYNOPSIS |
| .nf |
| .B #include <stdlib.h> |
| .sp |
| .BI "div_t div(int " numerator ", int " denominator ); |
| .br |
| .BI "ldiv_t ldiv(long " numerator ", long " denominator ); |
| .br |
| .BI "lldiv_t lldiv(long long " numerator ", long long " denominator ); |
| .sp |
| .B #include <inttypes.h> |
| .sp |
| .BI "imaxdiv_t imaxdiv(intmax_t " numerator ", intmax_t " denominator ); |
| .fi |
| .sp |
| .in -4n |
| Feature Test Macro Requirements for glibc (see |
| .BR feature_test_macros (7)): |
| .in |
| .ad l |
| .sp |
| .BR lldiv (): |
| .RS 4 |
| _ISOC99_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L |
| .RE |
| .ad |
| .SH DESCRIPTION |
| The |
| .BR div () |
| function computes the value |
| \fInumerator\fP/\fIdenominator\fP and |
| returns the quotient and remainder in a structure |
| named \fIdiv_t\fP that contains |
| two integer members (in unspecified order) named \fIquot\fP and \fIrem\fP. |
| The quotient is rounded toward zero. |
| The result satisfies \fIquot\fP*\fIdenominator\fP+\fIrem\fP = \fInumerator\fP. |
| .LP |
| The |
| .BR ldiv (), |
| .BR lldiv (), |
| and |
| .BR imaxdiv () |
| functions do the same, |
| dividing numbers of the indicated type and |
| returning the result in a structure |
| of the indicated name, in all cases with fields \fIquot\fP and \fIrem\fP |
| of the same type as the function arguments. |
| .SH RETURN VALUE |
| The \fIdiv_t\fP (etc.) structure. |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .TS |
| allbox; |
| lbw33 lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR div (), |
| .BR ldiv (), |
| .BR lldiv (), |
| .BR imaxdiv () |
| T} Thread safety MT-Safe |
| .TE |
| .SH CONFORMING TO |
| POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD. |
| The functions |
| .BR lldiv () |
| and |
| .BR imaxdiv () |
| were added in C99. |
| .SH EXAMPLE |
| After |
| .nf |
| |
| div_t q = div(\-5, 3); |
| |
| .fi |
| the values \fIq.quot\fP and \fIq.rem\fP are \-1 and \-2, respectively. |
| .SH SEE ALSO |
| .BR abs (3), |
| .BR remainder (3) |