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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/>.
*/
#import "MLKDynamicContext.h"
#import "MLKPackage.h"
#import "MLKRatio.h"
#import "runtime-compatibility.h"
#import "util.h"
#import <Foundation/NSString.h>
@implementation MLKRatio
-(MLKRatio *) initWithMPQ:(mpq_t)mpq
{
self = [super init];
mpq_init (value);
mpq_set (value, mpq);
return self;
}
+(MLKRatio *) ratioWithMPQ:(mpq_t)mpq
{
return AUTORELEASE ([[MLKRatio alloc] initWithMPQ:mpq]);
}
-(MLKRatio *) initWithString:(NSString *)string
base:(unsigned int)base
{
self = [super init];
mpq_init (value);
mpq_set_str (value, [string UTF8String], 10);
mpq_canonicalize (value);
return self;
}
-(MLKRatio *) initWithNumeratorString:(NSString *)numerString
denominatorString:(NSString *)denomString
negative:(BOOL)negative
base:(unsigned int)base
{
return [self initWithString:[NSString stringWithFormat:@"%s%@/%@",
(negative ? "-" : ""),
numerString,
denomString]
base:base];
}
+(MLKRatio *) ratioWithNumeratorString:(NSString *)numerString
denominatorString:(NSString *)denomString
negative:(BOOL)negative
base:(unsigned int)base
{
return AUTORELEASE ([[MLKRatio alloc] initWithNumeratorString:numerString
denominatorString:denomString
negative:negative
base:base]);
}
#define DEFINE_MPQ_TWOARG_OPERATION(SELECTOR, GMPFUN) \
DEFINE_GMP_OPERATION (SELECTOR (MLKNumber *)arg, \
mpq, \
GMPFUN (mpval, self->value, ((MLKRatio*)arg)->value), \
MLKNumber, \
MLKRatio, \
ratioWithMPQ:)
DEFINE_MPQ_TWOARG_OPERATION (add:, mpq_add)
DEFINE_MPQ_TWOARG_OPERATION (subtract:, mpq_sub)
DEFINE_MPQ_TWOARG_OPERATION (multiplyWith:, mpq_mul)
DEFINE_MPQ_TWOARG_OPERATION (divideBy:, mpq_div)
-(double) doubleValue
{
return mpq_get_d (value);
}
-(MLKInteger *) numerator
{
mpz_t numer;
MLKInteger *obj;
mpz_init_set (numer, mpq_numref (self->value));
obj = [MLKInteger integerWithMPZ:numer];
mpz_clear (numer);
return obj;
}
-(MLKInteger *) denominator
{
mpz_t denom;
MLKInteger *obj;
mpz_init_set (denom, mpq_denref (self->value));
obj = [MLKInteger integerWithMPZ:denom];
mpz_clear (denom);
return obj;
}
-(NSComparisonResult) compare:(MLKRatio *)arg
{
int cmp = mpq_cmp (self->value, arg->value);
if (cmp == 0)
return NSOrderedSame;
else if (cmp < 0)
return NSOrderedAscending;
else
return NSOrderedDescending;
}
-(BOOL) isEqual:(id)arg
{
return ([arg isKindOfClass:[MLKRatio class]]
&& mpq_equal (self->value, ((MLKRatio *)arg)->value));
}
-(NSString *) description
{
return [self descriptionWithBase:10];
}
-(NSString *) descriptionWithBase:(int)base
{
NSString *str;
char cstr[mpz_sizeinbase (mpq_numref(self->value), base)
+ mpz_sizeinbase (mpq_denref(self->value), base)
+ 3];
mpq_get_str (cstr, base, self->value);
str = [NSString stringWithUTF8String:cstr];
return str;
}
-(NSString *) descriptionForLisp
{
MLKInteger *base = [[MLKDynamicContext currentContext]
valueForSymbol:[[MLKPackage
findPackage:@"COMMON-LISP"]
intern:@"*PRINT-BASE*"]];
return [self descriptionWithBase:[base intValue]];
}
-(void) dealloc
{
mpq_clear (value);
[super dealloc];
}
@end
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