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-'\" t
-.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" References consulted:
-.\" Linux libc source code
-.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
-.\" 386BSD man pages
-.\" Modified 1993-07-24 by Rik Faith (faith@cs.unc.edu)
-.\" Modified 2002-07-27 by Walter Harms
-.\" (walter.harms@informatik.uni-oldenburg.de)
-.\"
-.TH modf 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-modf, modff, modfl \- extract signed integral and fractional values from
-floating-point number
-.SH LIBRARY
-Math library
-.RI ( libm ", " \-lm )
-.SH SYNOPSIS
-.nf
-.B #include <math.h>
-.P
-.BI "double modf(double " x ", double *" iptr );
-.BI "float modff(float " x ", float *" iptr );
-.BI "long double modfl(long double " x ", long double *" iptr );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR modff (),
-.BR modfl ():
-.nf
- _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
- || /* Since glibc 2.19: */ _DEFAULT_SOURCE
- || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
-.fi
-.SH DESCRIPTION
-These functions break the argument
-.I x
-into an integral
-part and a fractional part, each of which has the same sign as
-.IR x .
-The integral part is stored in the location pointed to by
-.IR iptr .
-.SH RETURN VALUE
-These functions return the fractional part of
-.IR x .
-.P
-If
-.I x
-is a NaN, a NaN is returned, and
-.I *iptr
-is set to a NaN.
-.P
-If
-.I x
-is positive infinity (negative infinity), +0 (\-0) is returned, and
-.I *iptr
-is set to positive infinity (negative infinity).
-.SH ERRORS
-No errors occur.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface Attribute Value
-T{
-.na
-.nh
-.BR modf (),
-.BR modff (),
-.BR modfl ()
-T} Thread safety MT-Safe
-.TE
-.SH STANDARDS
-C11, POSIX.1-2008.
-.SH HISTORY
-C99, POSIX.1-2001.
-.P
-The variant returning
-.I double
-also conforms to
-SVr4, 4.3BSD, C89.
-.SH SEE ALSO
-.BR frexp (3),
-.BR ldexp (3)