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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 <Foundation/NSArray.h>
#import <Foundation/NSDictionary.h>
#import <Foundation/NSException.h>
#import <Foundation/NSNull.h>
#import <Foundation/NSSet.h>
#import <Foundation/NSString.h>
#import <Foundation/NSThread.h>
#import "MLKCons.h"
#import "MLKEnvironment.h"
#import "MLKLexicalEnvironment.h"
#import "MLKLinkedList.h"
#import "MLKPackage.h"
#import "MLKParenReader.h"
#import "MLKReadtable.h"
#import "MLKSymbol.h"
#import "MLKInteger.h"
#import "runtime-compatibility.h"
#define MAKE_ENVIRONMENT(variable, parent, parent_member) \
(variable \
? (id) [[MLKEnvironment alloc] \
initWithParent:(parent \
? (id) parent_member \
: nil) \
bindings:variable] \
: (id) (parent ? (id) RETAIN (parent_member) : nil));
static MLKLexicalEnvironment *global_environment;
@implementation MLKLexicalEnvironment
+(void) initialize
{
NSMutableDictionary *vars = [NSMutableDictionary dictionary];
NSMutableDictionary *funs = [NSMutableDictionary dictionary];
MLKPackage *cl = [MLKPackage findPackage:@"COMMON-LISP"];
// MLKPackage *sys = [MLKPackage findPackage:@"TOILET-SYSTEM"];
[vars setObject:[NSNull null] forKey:[NSNull null]];
[vars setObject:[cl intern:@"T"] forKey:[cl intern:@"T"]];
global_environment = [[self alloc] initWithParent:nil
variables:vars
functions:funs];
}
-(MLKLexicalEnvironment *) initWithParent:(MLKLexicalEnvironment *)aContext
variables:(NSDictionary *)vars
functions:(NSDictionary *)handlers
{
self = [super init];
ASSIGN (_parent, (aContext ? aContext : global_environment));
_variables = MAKE_ENVIRONMENT(vars, _parent, _parent->_variables);
_functions = MAKE_ENVIRONMENT(handlers, _parent, _parent->_functions);
return self;
}
+(MLKLexicalEnvironment *) globalEnvironment
{
return global_environment;
}
-(NSSet *) variables
{
return [_variables bindings];
}
-(NSSet *) functions
{
return [_functions bindings];
}
-(id) valueForSymbol:(MLKSymbol *)symbol
{
return [_variables valueForBinding:symbol];
}
-(void) setValue:(id)value forSymbol:(MLKSymbol *)symbol
{
[_variables setValue:value forBinding:symbol];
}
-(void) addValue:(id)value forSymbol:(MLKSymbol *)symbol
{
[_variables addValue:value forBinding:symbol];
}
-(void) addBinding:(MLKSymbol *)symbol
{
[_variables addBinding:symbol];
}
-(BOOL) boundp:(MLKSymbol *)symbol
{
return [_variables boundp:symbol];
}
-(void) makunbound:(MLKSymbol *)symbol
{
[_variables makunbound:symbol];
}
-(id) functionForSymbol:(MLKSymbol *)symbol
{
return [_functions valueForBinding:symbol];
}
-(void) setFunction:(id)value forSymbol:(MLKSymbol *)symbol
{
[_functions setValue:value forBinding:symbol];
}
-(void) addFunction:(id)value forSymbol:(MLKSymbol *)symbol
{
[_functions addValue:value forBinding:symbol];
}
-(BOOL) fboundp:(MLKSymbol *)symbol
{
return [_functions boundp:symbol];
}
-(void) fmakunbound:(MLKSymbol *)symbol
{
[_functions makunbound:symbol];
}
-(void) dealloc
{
RELEASE (_variables);
RELEASE (_functions);
RELEASE (_parent);
[super dealloc];
}
@end
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