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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 "MLKCommaReader.h"
+
+#import "MLKCons.h"
+#import "MLKDynamicContext.h"
+#import "MLKReader.h"
+#import "MLKReadtable.h"
+#import "MLKPackage.h"
+#import "MLKStream.h"
+#import "runtime-compatibility.h"
+#import "util.h"
+
+
+@implementation MLKCommaReader
+-(NSArray *) applyToArray:(NSArray *)arguments
+{
+ MLKStream *stream;
+ MLKReadtable *readtable;
+ MLKPackage *cl, *sys;
+ MLKSymbol *marker;
+ unichar ch;
+ id quoted_form;
+
+ cl = [MLKPackage findPackage:@"COMMON-LISP"];
+ sys = [MLKPackage findPackage:@"TOILET-SYSTEM"];
+
+ stream = [arguments objectAtIndex:0];
+ readtable = [[MLKDynamicContext currentContext]
+ valueForSymbol:[cl intern:@"*READTABLE*"]];
+
+ if ((ch = [stream readChar]) == '@')
+ {
+ marker = [sys intern:@"UNQUOTE-SPLICING"];
+ }
+ else
+ {
+ marker = [sys intern:@"UNQUOTE"];
+ [stream unreadChar:ch];
+ }
+
+ while ([readtable isWhitespaceCharacter:(ch = [stream readChar])]);
+
+ [stream unreadChar:ch];
+
+ quoted_form = [MLKReader readFromStream:stream
+ eofError:YES
+ eofValue:nil
+ recursive:YES
+ preserveWhitespace:NO];
+
+ return [NSArray arrayWithObject:
+ [MLKCons cons:marker
+ with:[MLKCons cons:nullify(quoted_form)
+ with:nil]]];
+}
+@end