blob: 911fa6fe3af053a1ed42b9aab4ae1adbe5bb8a00 (
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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
# frozen_string_literal: false
#
#--
# bigdecimal/util extends various native classes to provide the #to_d method,
# and provides BigDecimal#to_d and BigDecimal#to_digits.
#++
class Integer < Numeric
# call-seq:
# int.to_d -> bigdecimal
#
# Returns the value of +int+ as a BigDecimal.
#
# require 'bigdecimal'
# require 'bigdecimal/util'
#
# 42.to_d # => 0.42e2
#
# See also BigDecimal::new.
#
def to_d
BigDecimal(self)
end
end
class Float < Numeric
# call-seq:
# float.to_d -> bigdecimal
# float.to_d(precision) -> bigdecimal
#
# Returns the value of +float+ as a BigDecimal.
# The +precision+ parameter is used to determine the number of
# significant digits for the result (the default is Float::DIG).
#
# require 'bigdecimal'
# require 'bigdecimal/util'
#
# 0.5.to_d # => 0.5e0
# 1.234.to_d(2) # => 0.12e1
#
# See also BigDecimal::new.
#
def to_d(precision=nil)
BigDecimal(self, precision || Float::DIG)
end
end
class String
# call-seq:
# str.to_d -> bigdecimal
#
# Returns the result of interpreting leading characters in +str+
# as a BigDecimal.
#
# require 'bigdecimal'
# require 'bigdecimal/util'
#
# "0.5".to_d # => 0.5e0
# "123.45e1".to_d # => 0.12345e4
# "45.67 degrees".to_d # => 0.4567e2
#
# See also BigDecimal::new.
#
def to_d
begin
BigDecimal(self)
rescue ArgumentError
BigDecimal(0)
end
end
end
class BigDecimal < Numeric
# call-seq:
# a.to_digits -> string
#
# Converts a BigDecimal to a String of the form "nnnnnn.mmm".
# This method is deprecated; use BigDecimal#to_s("F") instead.
#
# require 'bigdecimal/util'
#
# d = BigDecimal("3.14")
# d.to_digits # => "3.14"
#
def to_digits
if self.nan? || self.infinite? || self.zero?
self.to_s
else
i = self.to_i.to_s
_,f,_,z = self.frac.split
i + "." + ("0"*(-z)) + f
end
end
# call-seq:
# a.to_d -> bigdecimal
#
# Returns self.
#
# require 'bigdecimal/util'
#
# d = BigDecimal("3.14")
# d.to_d # => 0.314e1
#
def to_d
self
end
end
class Rational < Numeric
# call-seq:
# rat.to_d(precision) -> bigdecimal
#
# Returns the value as a BigDecimal.
#
# The required +precision+ parameter is used to determine the number of
# significant digits for the result.
#
# require 'bigdecimal'
# require 'bigdecimal/util'
#
# Rational(22, 7).to_d(3) # => 0.314e1
#
# See also BigDecimal::new.
#
def to_d(precision)
BigDecimal(self, precision)
end
end
|
