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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 "MLKRoot.h"
#import "MLKSymbol.h"
#import "runtime-compatibility.h"
#import <Foundation/NSArray.h>
#import <Foundation/NSException.h>
#import <Foundation/NSInvocation.h>
#import <Foundation/NSMethodSignature.h>
#import <Foundation/NSNull.h>
#import <Foundation/NSString.h>
static id nullify (id value)
{
if (value)
return value;
else
return [NSNull null];
}
static id denullify (id value)
{
if (value == [NSNull null])
return nil;
else
return value;
}
static NSMethodSignature *signature;
static MLKPackage *sys;
@implementation MLKRoot
+(void) initialize
{
signature = RETAIN ([self methodSignatureForSelector:@selector(car:)]);
sys = [MLKPackage findPackage:@"TOILET-SYSTEM"];
}
+(NSArray *) dispatch:(MLKSymbol *)name withArguments:(NSArray *)args
{
NSInvocation *invocation;
NSMutableString *methodName;
NSArray *result;
SEL selector;
NS_DURING
{
if ([sys findSymbol:[name name]] != name)
return nil;
}
NS_HANDLER
{
NS_VALUERETURN (nil, NSArray *);
}
NS_ENDHANDLER
invocation = [NSInvocation invocationWithMethodSignature:signature];
methodName = [NSMutableString stringWithString:[[name name] lowercaseString]];
[methodName replaceOccurrencesOfString:@"-"
withString:@"_"
options:NSLiteralSearch
range:NSMakeRange(0, [methodName length])];
[methodName appendString:@":"];
selector = NSSelectorFromString (methodName);
if (!selector || ![self respondsToSelector:selector])
return nil;
[invocation setSelector:selector];
[invocation setTarget:self];
[invocation setArgument:&args atIndex:2];
[invocation invoke];
[invocation getReturnValue:&result];
return result;
}
+(NSArray *) car:(NSArray *)args
{
return [NSArray arrayWithObject:nullify([denullify([args objectAtIndex:0]) car])];
}
+(NSArray *) cdr:(NSArray *)args
{
return [NSArray arrayWithObject:nullify([denullify([args objectAtIndex:0]) cdr])];
}
+(NSArray *) set_car:(NSArray *)args
{
[[args objectAtIndex:0] setCar:denullify([args objectAtIndex:1])];
return [NSArray arrayWithObject:[args objectAtIndex:1]];
}
+(NSArray *) set_cdr:(NSArray *)args
{
[[args objectAtIndex:0] setCdr:denullify([args objectAtIndex:1])];
return [NSArray arrayWithObject:[args objectAtIndex:1]];
}
+(NSArray *) cons:(NSArray *)args
{
return [NSArray arrayWithObject:
[MLKCons cons:denullify([args objectAtIndex:0])
with:denullify([args objectAtIndex:1])]];
}
@end
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