1+ /*
2+ *
3+ * @author
4+ *
5+ */
6+ class ArrayTools {
7+ public constructor ( ) {
8+ }
9+
10+
11+ //随机打乱数组
12+ public static RandomSort ( list :any ) :void {
13+ list . sort ( function ( ) {
14+ return Math . random ( ) - 0.5 ;
15+ } ) ;
16+ }
17+
18+ //数组排序
19+ public static Sort ( list :any ) :void {
20+ list . sort ( function ( a , b ) {
21+ return a - b
22+ } ) ;
23+ }
24+
25+ /**
26+ * UTF16和UTF8转换对照表
27+ * U+00000000 – U+0000007F 0xxxxxxx
28+ * U+00000080 – U+000007FF 110xxxxx 10xxxxxx
29+ * U+00000800 – U+0000FFFF 1110xxxx 10xxxxxx 10xxxxxx
30+ * U+00010000 – U+001FFFFF 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
31+ * U+00200000 – U+03FFFFFF 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
32+ * U+04000000 – U+7FFFFFFF 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
33+ */
34+ // 转码表
35+ private static table = [
36+ 'A' , 'B' , 'C' , 'D' , 'E' , 'F' , 'G' , 'H' ,
37+ 'I' , 'J' , 'K' , 'L' , 'M' , 'N' , 'O' , 'P' ,
38+ 'Q' , 'R' , 'S' , 'T' , 'U' , 'V' , 'W' , 'X' ,
39+ 'Y' , 'Z' , 'a' , 'b' , 'c' , 'd' , 'e' , 'f' ,
40+ 'g' , 'h' , 'i' , 'j' , 'k' , 'l' , 'm' , 'n' ,
41+ 'o' , 'p' , 'q' , 'r' , 's' , 't' , 'u' , 'v' ,
42+ 'w' , 'x' , 'y' , 'z' , '0' , '1' , '2' , '3' ,
43+ '4' , '5' , '6' , '7' , '8' , '9' , '+' , '/'
44+ ] ;
45+
46+ public static UTF16ToUTF8 ( str ) {
47+ var res = [ ] , len = str . length ;
48+ for ( var i = 0 ; i < len ; i ++ ) {
49+ var code = str . charCodeAt ( i ) ;
50+ if ( code > 0x0000 && code <= 0x007F ) {
51+ // 单字节，这里并不考虑0x0000，因为它是空字节
52+ // U+00000000 – U+0000007F 0xxxxxxx
53+ res . push ( str . charAt ( i ) ) ;
54+ } else if ( code >= 0x0080 && code <= 0x07FF ) {
55+ // 双字节
56+ // U+00000080 – U+000007FF 110xxxxx 10xxxxxx
57+ // 110xxxxx
58+ var byte1 = 0xC0 | ( ( code >> 6 ) & 0x1F ) ;
59+ // 10xxxxxx
60+ var byte2 = 0x80 | ( code & 0x3F ) ;
61+ res . push (
62+ String . fromCharCode ( byte1 ) ,
63+ String . fromCharCode ( byte2 )
64+ ) ;
65+ } else if ( code >= 0x0800 && code <= 0xFFFF ) {
66+ // 三字节
67+ // U+00000800 – U+0000FFFF 1110xxxx 10xxxxxx 10xxxxxx
68+ // 1110xxxx
69+ var byte1 = 0xE0 | ( ( code >> 12 ) & 0x0F ) ;
70+ // 10xxxxxx
71+ var byte2 = 0x80 | ( ( code >> 6 ) & 0x3F ) ;
72+ // 10xxxxxx
73+ var byte3 = 0x80 | ( code & 0x3F ) ;
74+ res . push (
75+ String . fromCharCode ( byte1 ) ,
76+ String . fromCharCode ( byte2 ) ,
77+ String . fromCharCode ( byte3 )
78+ ) ;
79+ } else if ( code >= 0x00010000 && code <= 0x001FFFFF ) {
80+ // 四字节
81+ // U+00010000 – U+001FFFFF 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
82+ } else if ( code >= 0x00200000 && code <= 0x03FFFFFF ) {
83+ // 五字节
84+ // U+00200000 – U+03FFFFFF 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
85+ } else /** if (code >= 0x04000000 && code <= 0x7FFFFFFF)*/ {
86+ // 六字节
87+ // U+04000000 – U+7FFFFFFF 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
88+ }
89+ }
90+ return res . join ( '' ) ;
91+ }
92+
93+ public static UTF8ToUTF16 ( str ) {
94+ var res = [ ] , len = str . length ;
95+ var i = 0 ;
96+ for ( var i = 0 ; i < len ; i ++ ) {
97+ var code = str . charCodeAt ( i ) ;
98+ // 对第一个字节进行判断
99+ if ( ( ( code >> 7 ) & 0xFF ) == 0x0 ) {
100+ // 单字节
101+ // 0xxxxxxx
102+ res . push ( str . charAt ( i ) ) ;
103+ } else if ( ( ( code >> 5 ) & 0xFF ) == 0x6 ) {
104+ // 双字节
105+ // 110xxxxx 10xxxxxx
106+ var code2 = str . charCodeAt ( ++ i ) ;
107+ var byte1 = ( code & 0x1F ) << 6 ;
108+ var byte2 = code2 & 0x3F ;
109+ var utf16 = byte1 | byte2 ;
110+ res . push ( String . fromCharCode ( utf16 ) ) ;
111+ } else if ( ( ( code >> 4 ) & 0xFF ) == 0xE ) {
112+ // 三字节
113+ // 1110xxxx 10xxxxxx 10xxxxxx
114+ var code2 = str . charCodeAt ( ++ i ) ;
115+ var code3 = str . charCodeAt ( ++ i ) ;
116+ var byte1 = ( code << 4 ) | ( ( code2 >> 2 ) & 0x0F ) ;
117+ var byte2 = ( ( code2 & 0x03 ) << 6 ) | ( code3 & 0x3F ) ;
118+ var utf16 = ( ( byte1 & 0x00FF ) << 8 ) | byte2
119+ res . push ( String . fromCharCode ( utf16 ) ) ;
120+ } else if ( ( ( code >> 3 ) & 0xFF ) == 0x1E ) {
121+ // 四字节
122+ // 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
123+ } else if ( ( ( code >> 2 ) & 0xFF ) == 0x3E ) {
124+ // 五字节
125+ // 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
126+ } else /** if (((code >> 1) & 0xFF) == 0x7E)*/ {
127+ // 六字节
128+ // 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
129+ }
130+ }
131+
132+ return res . join ( '' ) ;
133+ }
134+
135+ public static Base64Encode ( str ) {
136+ if ( ! str ) {
137+ return '' ;
138+ }
139+ var utf8 = this . UTF16ToUTF8 ( str ) ; // 转成UTF8
140+ var i = 0 ; // 遍历索引
141+ var len = utf8 . length ;
142+ var res = [ ] ;
143+ while ( i < len ) {
144+ var c1 = utf8 . charCodeAt ( i ++ ) & 0xFF ;
145+ res . push ( this . table [ c1 >> 2 ] ) ;
146+ // 需要补2个=
147+ if ( i == len ) {
148+ res . push ( this . table [ ( c1 & 0x3 ) << 4 ] ) ;
149+ res . push ( '==' ) ;
150+ break ;
151+ }
152+ var c2 = utf8 . charCodeAt ( i ++ ) ;
153+ // 需要补1个=
154+ if ( i == len ) {
155+ res . push ( this . table [ ( ( c1 & 0x3 ) << 4 ) | ( ( c2 >> 4 ) & 0x0F ) ] ) ;
156+ res . push ( this . table [ ( c2 & 0x0F ) << 2 ] ) ;
157+ res . push ( '=' ) ;
158+ break ;
159+ }
160+ var c3 = utf8 . charCodeAt ( i ++ ) ;
161+ res . push ( this . table [ ( ( c1 & 0x3 ) << 4 ) | ( ( c2 >> 4 ) & 0x0F ) ] ) ;
162+ res . push ( this . table [ ( ( c2 & 0x0F ) << 2 ) | ( ( c3 & 0xC0 ) >> 6 ) ] ) ;
163+ res . push ( this . table [ c3 & 0x3F ] ) ;
164+ }
165+
166+ return res . join ( '' ) ;
167+ }
168+
169+ public static Base64Decode ( str ) {
170+ if ( ! str ) {
171+ return '' ;
172+ }
173+ var len = str . length ;
174+ var i = 0 ;
175+ var res = [ ] ;
176+ var code1 = 0 ;
177+ var code2 = 0 ;
178+ var code3 = 0 ;
179+ var code4 = 0 ;
180+ while ( i < len ) {
181+ code1 = this . table . indexOf ( str . charAt ( i ++ ) ) ;
182+ code2 = this . table . indexOf ( str . charAt ( i ++ ) ) ;
183+ code3 = this . table . indexOf ( str . charAt ( i ++ ) ) ;
184+ code4 = this . table . indexOf ( str . charAt ( i ++ ) ) ;
185+
186+ let c1 = ( code1 << 2 ) | ( code2 >> 4 ) ;
187+ res . push ( String . fromCharCode ( c1 ) ) ;
188+
189+ if ( code3 != - 1 ) {
190+ let c2 = ( ( code2 & 0xF ) << 4 ) | ( code3 >> 2 ) ;
191+ res . push ( String . fromCharCode ( c2 ) ) ;
192+ }
193+ if ( code4 != - 1 ) {
194+ let c3 = ( ( code3 & 0x3 ) << 6 ) | code4 ;
195+ res . push ( String . fromCharCode ( c3 ) ) ;
196+ }
197+ }
198+ return this . UTF8ToUTF16 ( res . join ( '' ) ) ;
199+ }
200+ }
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