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94 lines
2.8 KiB
Groff
94 lines
2.8 KiB
Groff
.\" Copyright (c) 2007 Eric Anderson <anderson@FreeBSD.org>
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.\" Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd June 13, 2023
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.Dt EXPAND_NUMBER 3
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.Os
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.Sh NAME
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.Nm expand_number
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.Nd format a number from human readable form
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.Sh LIBRARY
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.Lb libutil
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.Sh SYNOPSIS
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.In libutil.h
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.Ft int
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.Fo expand_number
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.Fa "const char *buf" "uint64_t *num"
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.Fc
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.Sh DESCRIPTION
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The
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.Fn expand_number
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function parses the
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.Fa buf
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string and stores a unsigned 64-bit quantity at
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.Fa *num .
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.Pp
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The
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.Fn expand_number
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function
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is case-insensitive and
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follows the SI power of two convention.
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.Pp
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The suffixes are:
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.Bl -column "Suffix" "Description" "1000000000000000000" -offset indent
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.It Sy "Suffix" Ta Sy "Description" Ta Sy "Multiplier"
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.It Li K Ta No kilo Ta 1024
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.It Li M Ta No mega Ta 1048576
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.It Li G Ta No giga Ta 1073741824
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.It Li T Ta No tera Ta 1099511627776
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.It Li P Ta No peta Ta 1125899906842624
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.It Li E Ta No exa Ta 1152921504606846976
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.El
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.Pp
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For historical reasons, the
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.Fn expand_number
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function accepts and ignores a single
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.Dq B
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suffix at the end of the
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.Fa buf
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string.
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However, the usage of this suffix is discouraged.
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.Sh RETURN VALUES
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.Rv -std
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.Sh ERRORS
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The
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.Fn expand_number
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The given string contains no digits.
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.It Bq Er EINVAL
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An unrecognized suffix was given.
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.It Bq Er ERANGE
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Result doesn't fit into 64 bits.
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.El
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.Sh SEE ALSO
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.Xr humanize_number 3
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.Sh HISTORY
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The
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.Fn expand_number
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function first appeared in
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.Fx 6.3 .
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