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MLKFloat.m
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MLKFloat.m
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/* -*- mode: objc; coding: utf-8 -*- */
/* Toilet Lisp, 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 "MLKFloat.h"
#import "MLKSingleFloat.h"
#import "MLKDoubleFloat.h"
#import "MLKPackage.h"
#import "MLKDynamicContext.h"
#import "runtime-compatibility.h"
#import <Foundation/NSException.h>
@implementation MLKFloat
+(MLKFloat *) floatWithExponentMarker:(unichar)exponentMarker
integerPart:(NSString *)intPart
negative:(BOOL)negative
fractionalPart:(NSString *)fractPart
exponent:(NSString *)exponent
exponentNegative:(BOOL)exponentNegative
{
MLKSymbol *defaultFormat;
MLKPackage *cl;
cl = [MLKPackage findPackage:@"COMMON-LISP"];
defaultFormat = [[MLKDynamicContext currentContext]
valueForSymbol:[cl intern:@"*READ-DEFAULT-FLOAT-FORMAT*"]];
// FIXME: Shouldn't the readtable decide which exponent markers do what?
if (exponentMarker == 'd' || exponentMarker == 'D'
|| exponentMarker == 'l' || exponentMarker == 'L'
|| ((exponentMarker == 'e' || exponentMarker == 'E')
&& ((defaultFormat == [cl intern:@"DOUBLE-FLOAT"])
|| (defaultFormat == [cl intern:@"LONG-FLOAT"]))))
return [MLKDoubleFloat doubleFloatWithIntegerPart:intPart
negative:negative
fractionalPart:fractPart
exponent:exponent
exponentNegative:exponentNegative];
else
return [MLKSingleFloat singleFloatWithIntegerPart:intPart
negative:negative
fractionalPart:fractPart
exponent:exponent
exponentNegative:exponentNegative];
}
#define DECLARE_ABSTRACT(SIGNATURE, RETURN_VALUE) \
SIGNATURE \
{ \
[NSException raise:@"MLKInternalInconsistencyError" \
format:@"Tried to invoke an abstract method."]; \
return RETURN_VALUE; \
}
DECLARE_ABSTRACT (-(float) floatValue, 0.0)
DECLARE_ABSTRACT (-(double) doubleValue, 0.0)
DECLARE_ABSTRACT (-(MLKNumber *) add:(MLKNumber *)arg, nil)
DECLARE_ABSTRACT (-(MLKNumber *) subtract:(MLKNumber *)arg, nil)
DECLARE_ABSTRACT (-(MLKNumber *) multiplyWith:(MLKNumber *)arg, nil)
DECLARE_ABSTRACT (-(MLKNumber *) divideBy:(MLKNumber *)arg, nil)
-(NSString *) description
{
return [super description];
}
@end

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