/
utils.go
213 lines (183 loc) · 4.55 KB
/
utils.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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
package utils
import (
"bytes"
"errors"
"fmt"
"io/ioutil"
"math/rand"
"strconv"
"strings"
"time"
"unicode/utf8"
"unsafe"
"golang.org/x/text/encoding/simplifiedchinese"
"golang.org/x/text/encoding/unicode"
"golang.org/x/text/transform"
)
var ErrInvalidUtf8Rune = errors.New("Not Invalid Utf8 runes")
func IsBigEndian() bool {
var i uint16 = 0x1234
var p = (*[2]byte)(unsafe.Pointer(&i))
if (*p)[0] == 0x12 {
return true
}
return false
}
func Now() (string, uint32) {
s := time.Now().Format("0102150405")
i, _ := strconv.Atoi(s)
return s, uint32(i)
}
// TimeStamp2Str converts a timestamp(MMDDHHMMSS) int to a string(10 bytes).
func TimeStamp2Str(t uint32) string {
return fmt.Sprintf("%010d", t)
}
func FormatTime(time time.Time) string {
s := time.Format("060102150405")
return s + "032+"
}
func Utf8ToUcs2(in string) ([]byte, error) {
if !utf8.ValidString(in) {
return nil, ErrInvalidUtf8Rune
}
r := bytes.NewReader([]byte(in))
t := transform.NewReader(r, unicode.UTF16(unicode.BigEndian, unicode.IgnoreBOM).NewEncoder()) // UTF-16 bigendian, no-bom
out, err := ioutil.ReadAll(t)
if err != nil {
return nil, err
}
return out, nil
}
func Ucs2ToUtf8(in []byte) (string, error) {
r := bytes.NewReader(in)
t := transform.NewReader(r, unicode.UTF16(unicode.BigEndian, unicode.IgnoreBOM).NewDecoder()) // UTF-16 bigendian, no-bom
out, err := ioutil.ReadAll(t)
if err != nil {
return "", err
}
return string(out), nil
}
func Utf8ToGB18030(in string) (string, error) {
if !utf8.ValidString(in) {
return "", ErrInvalidUtf8Rune
}
r := bytes.NewReader([]byte(in))
t := transform.NewReader(r, simplifiedchinese.GB18030.NewEncoder())
out, err := ioutil.ReadAll(t)
if err != nil {
return "", err
}
return string(out), nil
}
func GB18030ToUtf8(in string) (string, error) {
r := bytes.NewReader([]byte(in))
t := transform.NewReader(r, simplifiedchinese.GB18030.NewDecoder())
out, err := ioutil.ReadAll(t)
if err != nil {
return "", err
}
return string(out), nil
}
func OctetString(s string, fixedLength int) string {
length := len(s)
if length == fixedLength {
return s
}
if length > fixedLength {
return s[length-fixedLength:]
}
return strings.Join([]string{s, string(make([]byte, fixedLength-length))}, "")
}
func TrimOctetString(in []byte) []byte {
i := bytes.IndexByte(in, 0)
if i == -1 {
return in
} else {
return in[:i]
}
}
func TrimStr(in []byte) string {
return string(TrimOctetString(in))
}
var NumTable = [16]byte{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}
func Uint64HexString(i uint64) string {
var sb strings.Builder
sb.Grow(16)
for shift := 60; shift >= 0; shift -= 4 {
sb.WriteByte(NumTable[(i>>shift)&0x0f])
}
return sb.String()
}
func Uint32HexString(i uint32) string {
var sb strings.Builder
sb.Grow(8)
for shift := 28; shift >= 0; shift -= 4 {
sb.WriteByte(NumTable[(i>>shift)&0x0f])
}
return sb.String()
}
func CopyStr(dest []byte, src string, index int, len int) int {
copy(dest[index:index+len], src)
index += len
return index
}
func CopyByte(dest []byte, src byte, index int) int {
dest[index] = src
index++
return index
}
func Bytes2StringSlice(in []byte, pl int) (ret []string) {
if len(in) <= pl {
return []string{TrimStr(in)}
} else {
part := len(in) / pl
ret = make([]string, part)
for i := 0; i < part; i++ {
ret[i] = TrimStr(in[i*pl : (i+1)*pl])
}
}
return
}
// ToTPUDHISlices 拆分为长短信切片
// 纯ASCII内容的拆分 pkgLen = 160
// 含中文内容的拆分 pkgLen = 140
func ToTPUDHISlices(content []byte, pkgLen int) (rt [][]byte) {
if len(content) < pkgLen {
return [][]byte{content}
}
headLen := 6
bodyLen := pkgLen - headLen
parts := len(content) / bodyLen
tailLen := len(content) % bodyLen
if tailLen != 0 {
parts++
}
// 分片消息组的标识,用于收集组装消息
groupId := byte(time.Now().UnixNano() & 0xff)
var part []byte
for i := 0; i < parts; i++ {
if i != parts-1 {
part = make([]byte, pkgLen)
} else {
// 最后一片
part = make([]byte, 6+tailLen)
}
part[0], part[1], part[2] = 0x05, 0x00, 0x03
part[3] = groupId
part[4], part[5] = byte(parts), byte(i+1)
if i != parts-1 {
copy(part[6:pkgLen], content[bodyLen*i:bodyLen*(i+1)])
} else {
copy(part[6:], content[0:tailLen])
}
rt = append(rt, part)
}
return rt
}
func RandNum(min, max int) int {
return rand.Intn(max-min) + min
}
// DiceCheck 投概率骰子,得到结果比给定数字大则返回true,否则返回false
func DiceCheck(prob float64) bool {
return float64(rand.Intn(10000))/10000.0 > prob
}