summaryrefslogtreecommitdiff
path: root/MLKRatio.m
blob: 476af4227f4b812bea765b2f348171663bc8627a (plain)
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
/* -*- 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 "MLKRatio.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 (MLKRatio *)arg,                       \
                        mpq,                                            \
                        GMPFUN (mpval, self->value, arg->value),        \
                        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);
}

-(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;
}

-(void) dealloc
{
  mpq_clear (value);
  [super dealloc];
}
@end