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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
#import "MLKSingleFloat.h"
#import "MLKDoubleFloat.h"
#import "runtime-compatibility.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;
}
-(MLKNumber *) add:(MLKNumber *)arg
{
if ([arg isKindOfClass:[MLKDoubleFloat class]])
return [MLKDoubleFloat doubleFloatWithDouble:(value + [(MLKFloat*)arg doubleValue])];
else
return [MLKSingleFloat singleFloatWithFloat:(value + [(MLKFloat*)arg floatValue])];
}
-(MLKNumber *) subtract:(MLKNumber *)arg
{
if ([arg isKindOfClass:[MLKDoubleFloat class]])
return [MLKDoubleFloat doubleFloatWithDouble:(value - [(MLKFloat*)arg doubleValue])];
else
return [MLKSingleFloat singleFloatWithFloat:(value - [(MLKFloat*)arg floatValue])];
}
-(MLKNumber *) multiplyWith:(MLKNumber *)arg
{
if ([arg isKindOfClass:[MLKDoubleFloat class]])
return [MLKDoubleFloat doubleFloatWithDouble:(value * [(MLKFloat*)arg doubleValue])];
else
return [MLKSingleFloat singleFloatWithFloat:(value * [(MLKFloat*)arg floatValue])];
}
-(MLKNumber *) divideBy:(MLKNumber *)arg
{
if ([arg isKindOfClass:[MLKDoubleFloat class]])
return [MLKDoubleFloat doubleFloatWithDouble:(value / [(MLKFloat*)arg doubleValue])];
else
return [MLKSingleFloat singleFloatWithFloat:(value / [(MLKFloat*)arg floatValue])];
}
-(NSComparisonResult) compare:(MLKSingleFloat *)arg
{
if (self->value == arg->value)
return NSOrderedSame;
else if (self->value < arg->value)
return NSOrderedAscending;
else
return NSOrderedDescending;
}
-(BOOL) isEqual:(id)arg
{
return ([arg isKindOfClass:[MLKSingleFloat class]]
&& self->value == ((MLKSingleFloat *)arg)->value);
}
-(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];
}
-(NSString *) descriptionForLisp
{
return [self description];
}
@end
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