From e60a004c48a14d0b5bb109fe7be5552643289925 Mon Sep 17 00:00:00 2001
From: Matthias Andreas Benkard <matthias@benkard.de>
Date: Mon, 16 Jun 2008 11:32:38 +0200
Subject: Add classes MLKDoubleFloat and MLKSingleFloat.

---
 MLKSingleFloat.m | 132 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 MLKSingleFloat.m

(limited to 'MLKSingleFloat.m')

diff --git a/MLKSingleFloat.m b/MLKSingleFloat.m
new file mode 100644
index 0000000..76965ec
--- /dev/null
+++ b/MLKSingleFloat.m
@@ -0,0 +1,132 @@
+/* -*- 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 "MLKSingleFloat.h"
+#import "MLKDoubleFloat.h"
+
+#import <Foundation/NSString.h>
+
+#include <stdio.h>
+
+
+@implementation MLKSingleFloat
+-(MLKSingleFloat *) initWithIntegerPart:(NSString *)intPart
+                               negative:(BOOL)negative
+                         fractionalPart:(NSString *)fractPart
+                               exponent:(NSString *)exponent
+                       exponentNegative:(BOOL)exponentNegative
+{
+  self = [super init];
+  sscanf ([[NSString stringWithFormat:@"%c%@.%@e%c%@",
+                     (negative ? '-' : '+'),
+                     intPart,
+                     fractPart,
+                     (exponentNegative ? '-' : '+'),
+                     ([exponent length] > 0 ? (id)exponent : (id)@"0")]
+            UTF8String],
+          "%f",
+          &value);
+  return self;
+}
+
++(MLKSingleFloat *) singleFloatWithIntegerPart:(NSString *)intPart
+                                      negative:(BOOL)negative
+                                fractionalPart:(NSString *)fractPart
+                                      exponent:(NSString *)exponent
+                              exponentNegative:(BOOL)exponentNegative
+{
+  return AUTORELEASE ([[self alloc] initWithIntegerPart:intPart
+                                    negative:negative
+                                    fractionalPart:fractPart
+                                    exponent:exponent
+                                    exponentNegative:exponentNegative]);
+}
+
+-(MLKSingleFloat *) initWithFloat:(float)aFloat
+{
+  self = [super init];
+  value = aFloat;
+  return self;
+}
+
++(MLKSingleFloat *) singleFloatWithFloat:(float)aFloat
+{
+  return AUTORELEASE ([[self alloc] initWithFloat:aFloat]);
+}
+
+-(float) floatValue
+{
+  return value;
+}
+
+-(double) doubleValue
+{
+  return value;
+}
+
+-(MLKFloat *) add:(MLKFloat *)arg
+{
+  if ([arg isKindOfClass:[MLKDoubleFloat class]])
+    return [MLKDoubleFloat doubleFloatWithDouble:(value + [arg doubleValue])];
+  else
+    return [MLKSingleFloat singleFloatWithFloat:(value + [arg floatValue])];
+}
+
+-(MLKFloat *) subtract:(MLKFloat *)arg
+{
+  if ([arg isKindOfClass:[MLKDoubleFloat class]])
+    return [MLKDoubleFloat doubleFloatWithDouble:(value - [arg doubleValue])];
+  else
+    return [MLKSingleFloat singleFloatWithFloat:(value - [arg floatValue])];
+}
+
+-(MLKFloat *) multiplyWith:(MLKFloat *)arg
+{
+  if ([arg isKindOfClass:[MLKDoubleFloat class]])
+    return [MLKDoubleFloat doubleFloatWithDouble:(value * [arg doubleValue])];
+  else
+    return [MLKSingleFloat singleFloatWithFloat:(value * [arg floatValue])];
+}
+
+-(MLKFloat *) divideBy:(MLKFloat *)arg
+{
+  if ([arg isKindOfClass:[MLKDoubleFloat class]])
+    return [MLKDoubleFloat doubleFloatWithDouble:(value / [arg doubleValue])];
+  else
+    return [MLKSingleFloat singleFloatWithFloat:(value / [arg floatValue])];
+}
+
+-(NSString *) description
+{
+  NSString *str = [NSString stringWithFormat:@"%e", value];
+  int i;
+
+  for (i = 0; i < [str length]; i++)
+    {
+      if ([str characterAtIndex:i] == 'e')
+        {
+          str = [NSString stringWithFormat:@"%@s%@",
+                          [str substringToIndex:i],
+                          [str substringFromIndex:(i+1)]];
+          return str;
+        }
+    }
+
+  return [NSString stringWithFormat:@"%@s0",str];
+}
+@end
-- 
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