2004-11-03 13:51:07 +00:00
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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
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2008-08-01 05:26:38 +00:00
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.\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
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.\" <mtk.manpages@gmail.com>
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2004-11-03 13:51:07 +00:00
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.\" Distributed under GPL
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.\" based on glibc infopages
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.\" polished, aeb
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_exit.2, brk.2, capget.2, chdir.2, chmod.2, chown.2, chroot.2, getdtablesize.2, gethostname.2, getpagesize.2, getsid.2, killpg.2, mknod.2, mknodat.2, poll.2, posix_fadvise.2, pread.2, readlink.2, setpgid.2, setreuid.2, sigaltstack.2, stat.2, symlink.2, sync.2, truncate.2, vfork.2, wait.2, wait4.2, a64l.3, abs.3, acos.3, acosh.3, asin.3, asinh.3, atan.3, atan2.3, atoi.3, cbrt.3, ceil.3, copysign.3, cosh.3, dirfd.3, div.3, ecvt.3, erf.3, erfc.3, exp.3, exp2.3, fabs.3, fdim.3, ffs.3, floor.3, fma.3, fmax.3, fmin.3, fmod.3, fpclassify.3, frexp.3, ftw.3, fwide.3, gcvt.3, getcwd.3, getdate.3, getgrent.3, gethostid.3, getpass.3, getpwent.3, getsubopt.3, getw.3, hypot.3, ilogb.3, index.3, isalpha.3, isgreater.3, iswblank.3, j0.3, ldexp.3, lockf.3, log.3, log10.3, log1p.3, logb.3, lrint.3, lround.3, mkstemp.3, mktemp.3, modf.3, mq_receive.3, mq_send.3, nan.3, nextafter.3, posix_fallocate.3, posix_memalign.3, printf.3, qecvt.3, random.3, realpath.3, remainder.3, remquo.3, rint.3, round.3, scalb.3, scalbln.3, scanf.3, siginterrupt.3, signbit.3, sigset.3, sinh.3, sqrt.3, strcasecmp.3, strcat.3, strchr.3, strcmp.3, strcoll.3, strcpy.3, strfry.3, strpbrk.3, strsep.3, strspn.3, strstr.3, strtod.3, strtok.3, strtol.3, strtoul.3, strxfrm.3, tanh.3, tgamma.3, trunc.3, ttyslot.3, ualarm.3, usleep.3, wprintf.3, armscii-8.7, cp1251.7, iso_8859-10.7, iso_8859-11.7, iso_8859-13.7, iso_8859-14.7, iso_8859-3.7, iso_8859-5.7, iso_8859-6.7, iso_8859-8.7, koi8-u.7: tstamp
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-09-19 17:19:13 +00:00
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.TH REMQUO 3 2010-09-20 "GNU" "Linux Programmer's Manual"
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2004-11-03 13:51:07 +00:00
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.SH NAME
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2007-04-12 22:42:49 +00:00
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remquo, remquof, remquol \- remainder and part of quotient
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2004-11-03 13:51:07 +00:00
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.SH SYNOPSIS
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.nf
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.B #include <math.h>
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.sp
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.BI "double remquo(double " x ", double " y ", int *" quo );
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2004-11-11 17:28:42 +00:00
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.br
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2004-11-03 13:51:07 +00:00
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.BI "float remquof(float " x ", float " y ", int *" quo );
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2004-11-11 17:28:42 +00:00
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.br
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2004-11-03 13:51:07 +00:00
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.BI "long double remquol(long double " x ", long double " y ", int *" quo );
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.fi
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2007-07-08 12:11:40 +00:00
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.sp
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Link with \fI\-lm\fP.
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.sp
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.in -4n
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Feature Test Macro Requirements for glibc (see
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.BR feature_test_macros (7)):
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.in
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.sp
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.ad l
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.BR remquo (),
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.BR remquof (),
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.BR remquol ():
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2010-09-18 15:50:56 +00:00
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.RS 4
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2010-09-18 15:52:39 +00:00
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_XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE ||
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_POSIX_C_SOURCE\ >=\ 200112L;
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2010-09-18 15:50:56 +00:00
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.br
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or
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2007-07-08 12:11:40 +00:00
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.I cc\ -std=c99
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2010-09-18 15:50:56 +00:00
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.RE
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.ad
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2004-11-03 13:51:07 +00:00
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.SH DESCRIPTION
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These functions compute the remainder and part of the quotient
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upon division of
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.I x
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by
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.IR y .
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A few bits of the quotient are stored via the
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.I quo
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2007-04-12 22:42:49 +00:00
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pointer.
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2008-08-01 05:26:38 +00:00
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The remainder is returned as the function result.
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2004-11-03 13:51:07 +00:00
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The value of the remainder is the same as that computed by the
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.BR remainder (3)
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function.
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The value stored via the
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.I quo
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pointer has the sign of
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2007-12-24 11:00:22 +00:00
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.IR "x\ /\ y"
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2004-11-03 13:51:07 +00:00
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and agrees with the quotient in at least the low order 3 bits.
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2007-12-24 11:00:22 +00:00
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For example, \fIremquo(29.0,\ 3.0)\fP returns \-1.0 and might store 2.
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2004-11-03 13:51:07 +00:00
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Note that the actual quotient might not fit in an integer.
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.\" A possible application of this function might be the computation
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.\" of sin(x). Compute remquo(x, pi/2, &quo) or so.
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.\"
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.\" glibc, UnixWare: return 3 bits
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.\" MacOS 10: return 7 bits
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2008-08-01 05:26:38 +00:00
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.SH RETURN VALUE
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On success, these functions return the same value as
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the analogous functions described in
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.BR remainder (3).
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If
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.I x
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or
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.I y
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is a NaN, a NaN is returned.
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If
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.I x
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is an infinity,
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and
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.I y
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is not a NaN,
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2008-08-04 16:00:58 +00:00
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a domain error occurs, and
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2008-08-01 05:26:38 +00:00
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a NaN is returned.
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If
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.I y
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is zero,
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and
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.I x
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is not a NaN,
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2008-08-04 16:00:58 +00:00
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a domain error occurs, and
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2008-08-01 05:26:38 +00:00
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a NaN is returned.
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.SH ERRORS
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See
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.BR math_error (7)
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for information on how to determine whether an error has occurred
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when calling these functions.
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.PP
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The following errors can occur:
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.TP
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Domain error: \fIx\fP is an infinity or \fIy\fP is 0, \
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and the other argument is not a NaN
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.\" .I errno
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.\" is set to
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.\" .BR EDOM .
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An invalid floating-point exception
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.RB ( FE_INVALID )
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is raised.
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.PP
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These functions do not set
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.IR errno .
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.\" FIXME . Is it intentional that these functions do not set errno?
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.\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6802
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2008-08-11 17:13:47 +00:00
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.SH VERSIONS
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These functions first appeared in glibc in version 2.1.
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2004-11-03 13:51:07 +00:00
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.SH "CONFORMING TO"
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2008-08-01 05:26:38 +00:00
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C99, POSIX.1-2001.
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2004-11-03 13:51:07 +00:00
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.SH "SEE ALSO"
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.BR fmod (3),
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.BR logb (3),
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2007-07-08 12:11:40 +00:00
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.BR remainder (3)
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