frexp.3 revision 140672
Copyright (c) 1991, 1993
The Regents of the University of California. All rights reserved.
This code is derived from software contributed to Berkeley by
the American National Standards Committee X3, on Information
Processing Systems.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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1. Redistributions of source code must retain the above copyright
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documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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@(#)frexp.3 8.1 (Berkeley) 6/4/93
$FreeBSD: head/lib/libc/gen/frexp.3 140672 2005-01-23 16:49:40Z das $
.Dd January 23, 2005 .Dt FREXP 3 .Os .Sh NAME .Nm frexp .Nd convert floating-point number to fractional and integral components .Sh LIBRARY .Lb libm .Sh SYNOPSIS n math.h .Ft double .Fn frexp "double value" "int *exp" .Ft double .Fn frexpf "float value" "int *exp" .Sh DESCRIPTION The .Fn frexp and .Fn frexpf functions break a floating-point number into a normalized fraction and an integral power of 2. They store the integer in the .Vt int object pointed to by .Fa exp . .Sh RETURN VALUES These functions return the value .Va x , such that .Va x is a .Vt double with magnitude in the interval o 1/2 , 1 Pc or zero, and .Fa value equals .Va x times 2 raised to the power .Fa *exp . If .Fa value is zero, both parts of the result are zero. .Sh SEE ALSO .Xr ldexp 3 , .Xr math 3 , .Xr modf 3 .Sh STANDARDS The .Fn frexp and .Fn frexpf functions conform to .St -isoC-99 .
The Regents of the University of California. All rights reserved.
This code is derived from software contributed to Berkeley by
the American National Standards Committee X3, on Information
Processing Systems.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)frexp.3 8.1 (Berkeley) 6/4/93
$FreeBSD: head/lib/libc/gen/frexp.3 140672 2005-01-23 16:49:40Z das $
.Dd January 23, 2005 .Dt FREXP 3 .Os .Sh NAME .Nm frexp .Nd convert floating-point number to fractional and integral components .Sh LIBRARY .Lb libm .Sh SYNOPSIS n math.h .Ft double .Fn frexp "double value" "int *exp" .Ft double .Fn frexpf "float value" "int *exp" .Sh DESCRIPTION The .Fn frexp and .Fn frexpf functions break a floating-point number into a normalized fraction and an integral power of 2. They store the integer in the .Vt int object pointed to by .Fa exp . .Sh RETURN VALUES These functions return the value .Va x , such that .Va x is a .Vt double with magnitude in the interval o 1/2 , 1 Pc or zero, and .Fa value equals .Va x times 2 raised to the power .Fa *exp . If .Fa value is zero, both parts of the result are zero. .Sh SEE ALSO .Xr ldexp 3 , .Xr math 3 , .Xr modf 3 .Sh STANDARDS The .Fn frexp and .Fn frexpf functions conform to .St -isoC-99 .