1 files changed, 131 insertions, 0 deletions
diff --git a/MLKLexicalEnvironment.m b/MLKLexicalEnvironment.m
new file mode 100644
index 0000000..58cf7f1
--- /dev/null
+++ b/MLKLexicalEnvironment.m
@@ -0,0 +1,131 @@
+/* -*- 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:vars]                                        \
+   : (id) (parent ? (id) RETAIN (parent_member) : nil));
+
+
+static MLKLexicalEnvironment *global_environment;
+
+
+@implementation MLKLexicalEnvironment
+-(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;
+}
+
+-(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