1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/* -*- 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/>.
*/
#define _XOPEN_SOURCE 600 // strtof
#import "MLKSingleFloat.h"
#import "MLKDoubleFloat.h"
#import <Foundation/NSString.h>
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
@implementation MLKSingleFloat
-(MLKSingleFloat *) initWithIntegerPart:(NSString *)intPart
negative:(BOOL)negative
fractionalPart:(NSString *)fractPart
exponent:(NSString *)exponent
exponentNegative:(BOOL)exponentNegative
{
self = [super init];
char *locale;
// FIXME: This is probably not thread-safe.
locale = setlocale (LC_NUMERIC, NULL);
setlocale (LC_NUMERIC, "C");
// strtof or sscanf -- is there a difference?
sscanf ([[NSString stringWithFormat:@"%c%@.%@e%c%@",
(negative ? '-' : '+'),
intPart,
fractPart,
(exponentNegative ? '-' : '+'),
([exponent length] > 0 ? (id)exponent : (id)@"0")]
UTF8String],
"%f",
&value);
setlocale (LC_NUMERIC, locale);
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
|
