Re: Unicode 4.0 BETA available for review

[Yung-Fong Tang]

Stefan Persson wrote:

Kenneth Whistler wrote:

Unicode 3.0 defined non-shorted UTF-8 as *irregular* code value
sequences. There were two types:
  a. 0xC0 0x80 for U+0000 (instead of 0x00)
  b. 0xED 0xA0 0x80 0xED 0xB0 0x80 for U+10000 (instead of 0xF0 0x90 
0x80 0x80)
 

Ah, but encoding NULL as a surrogate character and then encoding those 
two surrogates as three bytes, making totally 6 bytes a character, 
would also be technically possible (though not legal), right? 
How ? Surrogate pairs can only be used to represent U+10000 - U+10FFFF . 
It is IMPOSSIBLE to use Surrogate pair to represent any characters in 
the range of U+0000 - U+FFFF, including U+0000 which is NULL.



Stefan

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