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/* -*- mode: objc; coding: utf-8 -*- */
/* Étoilisp/Mulklisp, a Common Lisp subset for the Étoilé runtime.
* Copyright (C) 2008 Matthias Andreas Benkard.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#import "MLKCons.h"
#import "MLKPackage.h"
#import "runtime-compatibility.h"
#import <Foundation/NSArray.h>
#import <Foundation/NSString.h>
@implementation MLKCons
+(MLKCons*) cons:(id)car with:(id)cdr
{
return AUTORELEASE ([[self alloc] initWithCar:car cdr:cdr]);
}
-(MLKCons*) initWithCar:(id)car cdr:(id)cdr
{
self = [super init];
ASSIGN (_car, car);
ASSIGN (_cdr, cdr);
return self;
}
+(MLKCons*) listWithArray:(NSArray *)array
{
MLKCons *cons, *tail;
int i;
cons = nil;
tail = nil;
for (i = 0; i < [array count]; i++)
{
id item = [array objectAtIndex:i];
if (!tail)
{
cons = tail = [MLKCons cons:item with:nil];
}
else
{
[tail setCdr:[MLKCons cons:item with:nil]];
tail = [tail cdr];
}
}
return cons;
}
-(id) car
{
return _car;
}
-(id) cdr
{
return _cdr;
}
-(void) setCar:(id)value
{
ASSIGN (_car, value);
}
-(void) setCdr:(id)value
{
ASSIGN (_cdr, value);
}
-(NSArray *)array
{
NSMutableArray *array = [NSMutableArray array];
id rest = self;
while (rest)
{
[array addObject:[rest car]];
rest = [rest cdr];
}
return array;
}
-(NSString *)bareDescriptionForLisp
{
if (!_cdr)
return [NSString stringWithFormat:@"%@", [_car descriptionForLisp]];
else if ([_cdr isKindOfClass:[MLKCons class]])
return [NSString stringWithFormat:@"%@ %@",
(_car ? (id)[_car descriptionForLisp] : (id)@"()"),
[_cdr bareDescriptionForLisp]];
else
return [NSString stringWithFormat:@"%@ . %@",
(_car ? (id)[_car descriptionForLisp] : (id)@"()"),
[_cdr descriptionForLisp]];
}
-(NSString *)descriptionForLisp
{
if ([_cdr isKindOfClass:[MLKCons class]])
{
if (_car == [[MLKPackage findPackage:@"COMMON-LISP"] intern:@"QUOTE"])
return [NSString stringWithFormat:@"'%@", [_cdr bareDescriptionForLisp]];
else if (_car == [[MLKPackage findPackage:@"TOILET-SYSTEM"] intern:@"QUASIQUOTE"])
return [NSString stringWithFormat:@"`%@", [_cdr bareDescriptionForLisp]];
else if (_car == [[MLKPackage findPackage:@"TOILET-SYSTEM"] intern:@"UNQUOTE"])
return [NSString stringWithFormat:@",%@", [_cdr bareDescriptionForLisp]];
else if (_car == [[MLKPackage findPackage:@"TOILET-SYSTEM"] intern:@"UNQUOTE-SPLICING"])
return [NSString stringWithFormat:@",@%@", [_cdr bareDescriptionForLisp]];
}
return [NSString stringWithFormat:@"(%@)", [self bareDescriptionForLisp]];
}
-(id) copyWithZone:(NSZone *)zone
{
MLKCons *copy = [MLKCons allocWithZone:zone];
ASSIGN (copy->_car, _car);
ASSIGN (copy->_cdr, _cdr);
return copy;
}
-(void) dealloc
{
RELEASE (_car);
RELEASE (_cdr);
[super dealloc];
}
@end
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