minix/lib/libutil/strpct.3
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

99 lines
2.9 KiB
Groff

.\" $NetBSD: strpct.3,v 1.5 2013/07/20 21:39:57 wiz Exp $
.\"
.\" Copyright (c) 2011 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This file was contributed to The NetBSD Foundation by Christos Zoulas.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 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
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.Dd January 7, 2012
.Dt STRPCT 3
.Os
.Sh NAME
.Nm strpct ,
.Nm strspct
.Nd decimal percent formatters
.Sh LIBRARY
.Lb libutil
.Sh SYNOPSIS
.In util.h
.Ft char *
.Fn strpct "char *buf" "size_t bufsiz" "uintmax_t numerator" "uintmax_t denominator" "size_t precision"
.Ft char *
.Fn strspct "char *buf" "size_t bufsiz" "intmax_t numerator" "intmax_t denominator" "size_t precision"
.Sh DESCRIPTION
The
.Fn strpct
function formats the fraction represented by
.Fa numerator
and
.Fa denominator
into a percentage representation with given number of digits of
.Fa precision
without using floating point arithmetic.
.Sh RETURN VALUES
.Fn strpct
and
.Fn strspct
always return a pointer to a NUL-terminated (unless
.Fa buflen
is
.Dv 0 )
formatted string which
is placed in
.Fa buf
and is up to
.Fa buflen
characters.
If there was an overflow, the formatted string will reflect that precision
loss.
.Sh EXAMPLES
.Bd -literal -offset indent
strpct(buf, buflen, 1, 16, 3);
\(rA "6.250"
strpct(buf, buflen, 1, 2, 0);
\(rA "50"
.Ed
.Sh HISTORY
.Fn strpct
was originally implemented in
.Xr csh 1
for
.Nx 1.3 .
It printed into a static buffer, was not locale aware, handled
.Ft unsigned long
numbers, and printed a
.Dq %
at the end of the number.
Other programs such as
.Xr df 1
and
.Xr time 1
started using it.
.Fn strpct
and
.Fn strspct
appeared separately in libutil for
.Nx 6.0 .
.Sh AUTHORS
.An Erik E. Fair Aq Mt fair@netbsd.org