-
Notifications
You must be signed in to change notification settings - Fork 39
/
stdlib.go
121 lines (111 loc) · 3.4 KB
/
stdlib.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
// Copyright (c) 2009 The Go Authors. All rights reserved.
// Copyright (c) 2023 Sneller, Inc.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package date
import "errors"
func isleap(year int) bool {
return year%4 == 0 && (year%100 != 0 || year%400 == 0)
}
func norm(hi, lo, base int) (nhi, nlo int) {
if lo < 0 {
n := (-lo-1)/base + 1
hi -= n
lo += n * base
}
if lo >= base {
n := lo / base
hi += n
lo -= n * base
}
return hi, lo
}
// MarshalJSON implements json.Marshaler.
func (t Time) MarshalJSON() ([]byte, error) {
if t.Year() >= 10000 {
return nil, errors.New("date.MarshalJSON: year outside of range [0,9999]")
}
n := len("0000-00-00T00:00:00Z")
if t.ns != 0 {
n += len(".999999999")
}
b := make([]byte, 0, n+2)
b = append(b, '"')
b = t.AppendRFC3339Nano(b)
b = append(b, '"')
return b, nil
}
// UnmarshalJSON implements json.Unmarshaler.
func (t *Time) UnmarshalJSON(b []byte) error {
if string(b) == "null" {
return nil
}
if len(b) == 0 || b[0] != '"' {
return errors.New("date.UnmarshalJSON: expected a string")
}
var ok bool
*t, ok = Parse(b[1 : len(b)-1])
if !ok {
return errors.New("date.UnmarshalJSON: failed to parse")
}
return nil
}
// appendInt appends the decimal form of x to b and
// returns the result. If the decimal form (excluding
// sign) is shorter than width, the result is padded
// with leading 0's. Duplicates functionality in
// strconv, but avoids dependency.
//
// If trim is true, trailing zeroes will not be
// included.
func appendInt(b []byte, x int, width int, trim bool) []byte {
u := uint(x)
if x < 0 {
b = append(b, '-')
u = uint(-x)
}
// Assemble decimal in reverse order.
var buf [20]byte
i := len(buf)
for u >= 10 {
q := u / 10
if trim = trim && u == q*10; trim {
width-- // avoid extra padding
} else {
i--
buf[i] = byte('0' + u - q*10)
}
u = q
}
i--
buf[i] = byte('0' + u)
// Add 0-padding.
for w := len(buf) - i; w < width; w++ {
b = append(b, '0')
}
return append(b, buf[i:]...)
}