mirror of https://github.com/mkerrisk/man-pages
98 lines
3.0 KiB
Groff
98 lines
3.0 KiB
Groff
.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
|
|
.\"
|
|
.\" Permission is granted to make and distribute verbatim copies of this
|
|
.\" manual provided the copyright notice and this permission notice are
|
|
.\" preserved on all copies.
|
|
.\"
|
|
.\" Permission is granted to copy and distribute modified versions of this
|
|
.\" manual under the conditions for verbatim copying, provided that the
|
|
.\" entire resulting derived work is distributed under the terms of a
|
|
.\" 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.\" manual page may be incorrect or out-of-date.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
|
|
.\" responsibility for errors or omissions, or for damages resulting from
|
|
.\" the use of the information contained herein. The author(s) may not
|
|
.\" have taken the same level of care in the production of this manual,
|
|
.\" which is licensed free of charge, as they might when working
|
|
.\" professionally.
|
|
.\"
|
|
.\" Formatted or processed versions of this manual, if unaccompanied by
|
|
.\" the source, must acknowledge the copyright and authors of this work.
|
|
.\"
|
|
.\" 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 2007-07-26 "" "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
|
|
.sp
|
|
.BR lldiv ():
|
|
_XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE; or
|
|
.I cc\ -std=c99
|
|
.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 towards 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 "CONFORMING TO"
|
|
SVr4, 4.3BSD, C89.
|
|
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)
|