From 50aae29d9ac3993b97075632a7b9f9dba2ab6fb3 Mon Sep 17 00:00:00 2001 From: "William F. Jolitz" Date: Sat, 29 Jun 1991 13:33:18 -0800 Subject: [PATCH] 386BSD 0.0 development Work on file usr/src/lib/libc/gen/ldexp.3 Co-Authored-By: Lynne Greer Jolitz Synthesized-from: 386BSD-0.0/src --- usr/src/lib/libc/gen/ldexp.3 | 77 ++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 usr/src/lib/libc/gen/ldexp.3 diff --git a/usr/src/lib/libc/gen/ldexp.3 b/usr/src/lib/libc/gen/ldexp.3 new file mode 100644 index 0000000000..7b96ef4871 --- /dev/null +++ b/usr/src/lib/libc/gen/ldexp.3 @@ -0,0 +1,77 @@ +.\" Copyright (c) 1991 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. +.\" +.\" @(#)ldexp.3 5.2 (Berkeley) 6/29/91 +.\" +.Dd June 29, 1991 +.Dt LDEXP 3 +.Os +.Sh NAME +.Nm ldexp +.Nd mutliply floating-point number by integral power of 2 +.Sh SYNOPSIS +.Fd #include +.Ft double +.Fn ldexp "double x" "int exp" +.Sh DESCRIPTION +The +.Fn ldexp +function multiplies a floating-point number by an integral +power of 2. +.Sh RETURN VALUES +The +.Fn ldexp +function returns the value of +.Fa x +times 2 raised to the power +.Fa exp . +.Pp +If the resultant value would cause an overflow, +the global variable +.Va errno +is set to +.Er ERANGE +and the value +.Dv HUGE +is returned. +.Sh SEE ALSO +.Xr frexp 3 , +.Xr modf 3 , +.Xr math 3 +.Sh STANDARDS +The +.Fn ldexp +function conforms +.St -ansiC . -- 2.20.1