lisp - lisp interpreter

lisp

Lisp is a provisional lisp interpreter. It only runs in eval mode. Built in functions are named in lower case, and case is distinguished. It is being transmuted from a subset of lisp as provided by the Harvard UNIX lisp in use at UCB, to a subset of MIT's MACLISP.

The following functions are provided as machine code:

Lambda functions:

atom	dptr	load	putd	rplacd
bcdp	drain	null	putprop	set
car	eq	numberp	ratom	terpr
cdr	equal	outfile	read
close	eval	patom	readc
concat	get	pntlen	retbrk
cons	getd	portp	return
cont	infile	print	rplaca

Nlambda functions (possibly simulating ones which are normally lambdas):

add1	difference	onep	quotient	zerop
and	exit	or	reset
break	go	plus	setq
cond	minus	product	sub1
cond	mod	prog	sum
def	not	quote	times

The following functions are provided as lisp code (and at the moment must be read in by saying (load 'auxfns):

add	copy	length	numbp
append	defevq	linelength	pp_etc
apply*	defprop	member	reverse
charcnt	defprop	memcar	terpri
chrct	diff	memcdr
conc	last	nconc

All of the above functions are documented in the ``Harvard Lisp Manual.''

The following functions are provided as in MIT's MACLISP.

alphalessp	do	mapc	setsyntax
apply	explodec	mapcar	throw
ascii	exploden	prog2	tyi
catch	funcall	progn	tyipeek
defun	implode	progv	tyo

``Hairy control structure'' is provided by the Nlambda (process command inport outport) where command is an atom whose print name is some command that you would wish typed at the terminal, e.g. ``neqn\ |\ nroff\ \-ms''; where inport and outport are atoms which will be bound to port descriptors for use in communication with the subprocess. Inport is a port to a pipe which will be read by the subprocess as its standard input. If Inport is nil (or not present), the subprocess inherits the standard input, and lisp waits for the subprocess to die. If Inport is the atom t lisp continues without waiting.

Originally written by Jeff Levinsky, Mike Curry, and John Breedlove. Keith Sklower made it work and is maintaining the current version. The garbage collector was implemented by Bill Rowan.

Harvard UNIX Lisp Manual
Maclisp Manual
`UCB Franz Lisp Manual, Version 1 (in preparation)'

The status bits for setsyntax are not the same as for MACLISP.

Closing down a pipe doesn't always seem to work correctly.

Arrays are not implemented in version 1.