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diff --git a/man3p/frexp.3p b/man3p/frexp.3p new file mode 100644 index 000000000..3a57686c5 --- /dev/null +++ b/man3p/frexp.3p @@ -0,0 +1,71 @@ +.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved +.TH "FREXP" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" frexp +.SH NAME +frexp, frexpf, frexpl \- extract mantissa and exponent from a double +precision number +.SH SYNOPSIS +.LP +\fB#include <math.h> +.br +.sp +double frexp(double\fP \fInum\fP\fB, int *\fP\fIexp\fP\fB); +.br +float frexpf(float\fP \fInum\fP\fB, int *\fP\fIexp\fP\fB); +.br +long double frexpl(long double\fP \fInum\fP\fB, int *\fP\fIexp\fP\fB); +.br +\fP +.SH DESCRIPTION +.LP +These functions shall break a floating-point number \fInum\fP into +a normalized fraction and an integral power of 2. The +integer exponent shall be stored in the \fBint\fP object pointed to +by \fIexp\fP. +.SH RETURN VALUE +.LP +For finite arguments, these functions shall return the value \fIx\fP, +such that \fIx\fP has a magnitude in the interval +[0.5,1) or 0, and \fInum\fP equals \fIx\fP times 2 raised to the power +*\fIexp\fP. +.LP +If +\fInum\fP is NaN, a NaN shall be returned, and the value of *\fIexp\fP +is unspecified. +.LP +If \fInum\fP is \(+-0, \(+-0 shall be returned, and the value of *\fIexp\fP +shall be 0. +.LP +If \fInum\fP is \(+-Inf, \fInum\fP shall be returned, and the value +of *\fIexp\fP is unspecified. +.SH ERRORS +.LP +No errors are defined. +.LP +\fIThe following sections are informative.\fP +.SH EXAMPLES +.LP +None. +.SH APPLICATION USAGE +.LP +None. +.SH RATIONALE +.LP +None. +.SH FUTURE DIRECTIONS +.LP +None. +.SH SEE ALSO +.LP +\fIisnan\fP() , \fIldexp\fP() , \fImodf\fP() , the +Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<math.h>\fP +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of +Electrical and Electronics Engineers, Inc and The Open Group. In the +event of any discrepancy between this version and the original IEEE and +The Open Group Standard, the original IEEE and The Open Group Standard +is the referee document. The original Standard can be obtained online at +http://www.opengroup.org/unix/online.html . |