ftp.nice.ch/pub/next/developer/languages/lisp/AKCL.1.599.s.tar.gz#/akcl-1-599/c/multival.c

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/*
(c) Copyright Taiichi Yuasa and Masami Hagiya, 1984.  All rights reserved.
Copying of this file is authorized to users who have executed the true and
proper "License Agreement for Kyoto Common LISP" with SIGLISP.
*/

/*

	multival.c

	Multiple Values
*/

#include "include.h"

Lvalues()
{
	if (vs_base == vs_top) vs_base[0] = Cnil;
}

Lvalues_list()
{
	object list;

	check_arg(1);
	list = vs_base[0];
	vs_top = vs_base;
	while (!endp(list)) {	
		vs_push(MMcar(list));
		list = MMcdr(list);
	}
	if (vs_top == vs_base) vs_base[0] = Cnil;
}

Fmultiple_value_list(form)
object form;
{
	object *top = vs_top;

	if (endp(form))
		FEtoo_few_argumentsF(form);
	if (!endp(MMcdr(form)))
		FEtoo_many_argumentsF(form);
	vs_push(Cnil);
	eval(MMcar(form));
	while (vs_base < vs_top) {	
		top[0] = MMcons(vs_top[-1],top[0]);
		vs_top--;
	}
	vs_base = top;
	vs_top = top+1;
}

Fmultiple_value_call(form)
object form;
{
	object *top = vs_top;
	object *top1;
	object *top2;

	if (endp(form))
		FEtoo_few_argumentsF(form);
	eval(MMcar(form));
	vs_top = top;
	vs_push(vs_base[0]);
	form = MMcdr(form);
	while (!endp(form)) {
		top1 = vs_top;
		eval(MMcar(form));
		top2 = vs_top;
		vs_top = top1;
		while (vs_base < top2) {
			vs_push(vs_base[0]);
			vs_base++;
		}
		form = MMcdr(form);
	}
	vs_base = top+1;
	super_funcall(top[0]);
}

Fmultiple_value_prog1(forms)
object forms;
{
	object *top;
	object *base = vs_top;

	if (endp(forms))
		FEtoo_few_argumentsF(forms);
	eval(MMcar(forms));
	top = vs_top;
	vs_top=base;
	while (vs_base < top) {	
		vs_push(vs_base[0]);
		vs_base++;
	}
	top = vs_top;
	forms = MMcdr(forms);
	while (!endp(forms)) {	
		eval(MMcar(forms));
		vs_top = top;
		forms = MMcdr(forms);
	}
	vs_base = base;
	vs_top = top;
	if (vs_base == vs_top) vs_base[0] = Cnil;
}

	
init_multival()
{
	make_constant("MULTIPLE-VALUES-LIMIT",make_fixnum(32));
	make_function("VALUES",Lvalues);
	make_function("VALUES-LIST",Lvalues_list);
	make_special_form("MULTIPLE-VALUE-CALL",Fmultiple_value_call);
	make_special_form("MULTIPLE-VALUE-PROG1",
			  Fmultiple_value_prog1);
	make_special_form("MULTIPLE-VALUE-LIST",Fmultiple_value_list);
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.