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.Dd January 26, 2019
.Dt BEEF 1
.Os
.
.Sh NAME
.Nm beef
.Nd Befunge-93 interpreter
.
.Sh SYNOPSIS
.Nm
.Op Ar file
.
.Sh DESCRIPTION
.Nm
is a Befunge-93 interpreter.
If no
.Ar file
is provided,
the program is read from standard input.
.
.Ss Befunge-93 Command Summary
.Bl -tag -width "0-9" -compact
.It \(dq
toggle string mode
.It 0-9
push value
.It +
add
.It -
subtract
.It *
multiply
.It /
divide
.It %
modulo
.It !
not
.It `
greater than
.It >
right
.It <
left
.It ^
up
.It v
down
.It ?
random
.It _
horizontal (left) if
.It |
vertical (up) if
.It :
duplicate
.It \e
swap
.It $
drop
.It .
output integer
.It ,
output ASCII
.It #
bridge
.It g
get (y, x)
.It p
put (y, x) = v
.It &
input integer
.It ~
input ASCII
.It @
exit
.El
.
.Sh EXIT STATUS
.Nm
exits with the top value left on the stack,
or 0 if the stack is left empty.
.
.Sh STANDARDS
.Rs
.%A Chris Pressey
.%Q Cat's Eye Technologies
.%T Befunge-93
.%D September, 1993
.%U https://github.com/catseye/Befunge-93/blob/master/doc/Befunge-93.markdown
.Re
.
.Sh CAVEATS
.Nm
does not support Linux
since it uses
.Xr arc4random_uniform 3 .
|