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星期日 六月 03, 2007
Legal UTF-8 Sequence(合法的、安全的UTF-8)

Ienup Sung has posted one blog(http://blogs.sun.com/is/entry/secure_utf_8) about Secure UTF-8 sequence, very useful. And below table is copied from his blog directly.

Table 2: Legal UTF-8 Byte Sequences
Unicode Scalar Values in Binary
 Hex Min
 Hex Max
 1st Byte 2nd Byte 3rd Byte 4th Byte
00000000 00000000 0xxxxxxx U+0000 U+007F 00..7F      
00000000 00000yyy yyxxxxxx U+0080 U+07FF C2..DF 80..BF
    
00000000 zzzzyyyy yyxxxxxx U+0800 U+0FFF E0 A0..BF 80..BF  
U+1000
 U+CFFF
 E1..EC
 80..BF 80..BF
U+D000
 U+D7FF
 ED
 80..9F 80..BF
U+D800
 U+DFFF
 ill-formed
U+E000
 U+FFFF
 EE..EF
 80..BF 80..BF
000uuuuu zzzzyyyy yyxxxxxx U+10000 U+3FFFF F0 90..BF 80..BF 80..BF
U+40000
 U+FFFFF
 F1..F3
 80..BF 80..BF 80..BF
U+100000
 U+10FFFF
 F4
 80..8F 80..BF 80..BF

 

Posted at 09:49上午 六月 03, 2007 by Yaodong Zero Yao in I18N  |  评论[0]

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