-
Notifications
You must be signed in to change notification settings - Fork 0
/
float.go
127 lines (120 loc) · 2.46 KB
/
float.go
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
package conv
import (
"encoding/json"
"fmt"
"strconv"
)
// ToFloat64 casts an interface to a float64 type.
func ToFloat64(i interface{}) float64 {
v, _ := ToFloat64E(i)
return v
}
// ToFloat32 casts an interface to a float32 type.
func ToFloat32(i interface{}) float32 {
v, _ := ToFloat32E(i)
return v
}
// ToFloat64E casts an interface to a float64 type.
func ToFloat64E(i interface{}) (float64, error) {
intv, ok := toInt(i)
if ok {
return float64(intv), nil
}
switch s := i.(type) {
case float64:
return s, nil
case float32:
return float64(s), nil
case int64:
return float64(s), nil
case int32:
return float64(s), nil
case int16:
return float64(s), nil
case int8:
return float64(s), nil
case uint:
return float64(s), nil
case uint64:
return float64(s), nil
case uint32:
return float64(s), nil
case uint16:
return float64(s), nil
case uint8:
return float64(s), nil
case string:
v, err := strconv.ParseFloat(s, 64)
if err == nil {
return v, nil
}
return 0, fmt.Errorf("unable to cast %#v of type %T to float64", i, i)
case json.Number:
v, err := s.Float64()
if err == nil {
return v, nil
}
return 0, fmt.Errorf("unable to cast %#v of type %T to float64", i, i)
case bool:
if s {
return 1, nil
}
return 0, nil
case nil:
return 0, nil
default:
return 0, fmt.Errorf("unable to cast %#v of type %T to float64", i, i)
}
}
// ToFloat32E casts an interface to a float32 type.
func ToFloat32E(i interface{}) (float32, error) {
intv, ok := toInt(i)
if ok {
return float32(intv), nil
}
switch s := i.(type) {
case float64:
return float32(s), nil
case float32:
return s, nil
case int64:
return float32(s), nil
case int32:
return float32(s), nil
case int16:
return float32(s), nil
case int8:
return float32(s), nil
case uint:
return float32(s), nil
case uint64:
return float32(s), nil
case uint32:
return float32(s), nil
case uint16:
return float32(s), nil
case uint8:
return float32(s), nil
case string:
v, err := strconv.ParseFloat(s, 32)
if err == nil {
return float32(v), nil
}
return 0, fmt.Errorf("unable to cast %#v of type %T to float32", i, i)
case json.Number:
v, err := s.Float64()
if err == nil {
return float32(v), nil
}
return 0, fmt.Errorf("unable to cast %#v of type %T to float32", i, i)
case bool:
if s {
return 1, nil
}
return 0, nil
case nil:
return 0, nil
default:
return 0, fmt.Errorf("unable to cast %#v of type %T to float32", i, i)
}
}