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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/>.
*/
#define _XOPEN_SOURCE 600 // strtof (not actually needed here)
#import "MLKSingleFloat.h"
#import "MLKDoubleFloat.h"
#import <Foundation/NSString.h>
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
@implementation MLKDoubleFloat
-(MLKDoubleFloat *) 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");
// strtod or sscanf -- is there a difference?
sscanf ([[NSString stringWithFormat:@"%c%@.%@e%c%@",
(negative ? '-' : '+'),
intPart,
fractPart,
(exponentNegative ? '-' : '+'),
([exponent length] > 0 ? (id)exponent : (id)@"0")]
UTF8String],
"%lf",
&value);
setlocale (LC_NUMERIC, locale);
return self;
}
+(MLKDoubleFloat *) doubleFloatWithIntegerPart:(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]);
}
-(MLKDoubleFloat *) initWithDouble:(double)aDouble
{
self = [super init];
value = aDouble;
return self;
}
+(MLKDoubleFloat *) doubleFloatWithDouble:(double)aDouble
{
return AUTORELEASE ([[self alloc] initWithDouble:aDouble]);
}
-(float) floatValue
{
return value;
}
-(double) doubleValue
{
return value;
}
-(MLKFloat *) add:(MLKFloat *)arg
{
return [MLKDoubleFloat doubleFloatWithDouble:(value + [arg doubleValue])];
}
-(MLKFloat *) subtract:(MLKFloat *)arg
{
return [MLKDoubleFloat doubleFloatWithDouble:(value - [arg doubleValue])];
}
-(MLKFloat *) multiplyWith:(MLKFloat *)arg
{
return [MLKDoubleFloat doubleFloatWithDouble:(value * [arg doubleValue])];
}
-(MLKFloat *) divideBy:(MLKFloat *)arg
{
return [MLKDoubleFloat doubleFloatWithDouble:(value / [arg doubleValue])];
}
-(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:@"%@d%@",
[str substringToIndex:i],
[str substringFromIndex:(i+1)]];
return str;
}
}
return [NSString stringWithFormat:@"%@d0",str];
}
-(NSString *) descriptionForLisp
{
return [self description];
}
@end
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