.\"	$Id: moo.1,v 1.8 2007/01/11 19:03:07 ray Exp $
.\"
.\" Written by Raymond Lai <ray@cyth.net>.
.\" Public domain.
.\"
.Dd March 2, 2006
.Dt MOO 1
.Os
.Sh NAME
.Nm moo
.Nd Marco's Object Oriented calculator
.Sh SYNOPSIS
.Nm
.Op Fl su
.Op Fl b Ar base
.Op Ar expr
.Op Ar ...
.Sh DESCRIPTION
A simple calculator that accepts C-like syntax as input.
Calculations are done on
.Ar expr ,
if given.
Otherwise, the standard input is used.
.Pp
Numbers can be entered in hexadecimal (0xbeef),
decimal (1984),
octal (007),
and binary (0b1001).
All numerical operators (+, -, *, /, %),
bit operators (|, ^, &, ~, <<, >>),
and logical operators (==, !=, <, >, <=, >=, !, &&, ||)
are supported.
.Pp
Output will be in the same bases as the input,
unless a different base was specified
(see
.Fl b
flag below).
If only one number is input,
the result is printed in all bases.
.Pp
The options are:
.Bl -tag -width Ds
.It Fl b Ar base
Output numbers in
.Ar base
format.
.Ar base
can be 2, 8, 10, 16, or `all'.
Multiple bases may be specified by giving the
.Fl b
flag multiple times.
.It Fl s
Output base 10 numbers as signed.
.It Fl u
Output base 10 numbers as unsigned.
.El
.Sh ENVIRONMENT
.Bl -tag -width Ds
.It Ev TMPDIR
Specifies a directory for temporary files to be created.
The default is
.Pa /tmp .
.El
.Sh SEE ALSO
.Xr bc 1 ,
.Xr dc 1 ,
.Xr expr 1
.Sh AUTHORS
.Nm
was written for the public domain by
.An Ray Lai Aq ray@cyth.net
after much whining by Marco Peereboom.
.Sh CAVEATS
Integer overflows are not checked.
Marco says,
``I don't think you should call the integer overflows a bug but a feature.
You can use it to test signed unsigned issues.''
.Sh BUGS
Calculations are limited to the size of a 64-bit integer.
.Pp
Like
.Xr bc 1 ,
.Nm
parses ``3--2'' without error.