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"Mozilla разрабатывает новый язык программирования Rust" Отправлено sku, 01-Дек-10 18:54
Тут такое дело, <...> Substring search is just byte string search. Properties 2, 3, and 4 imply that given a string of correctly encoded UTF-8, the only way those bytes can appear in a larger UTF-8 text is when they represent the same code points. So you can use any 8-bit safe byte at a time search function, like strchr or strstr, to run the search. Однако, вместе с тем UTF-8 does give up the ability to do random access using code point indices. Programs that need to jump to the nth Unicode code point in a file or on a line—text editors are the canonical example—will typically convert incoming UTF-8 to an internal representation like an array of code points and then convert back to UTF-8 for output, but most programs are simpler when written to manipulate UTF-8 directly. (c) Russ Cox, http://research.swtch.com/2010/03/utf-8-bits-bytes-and-benef...

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Сообщение*:	> Тут такое дело, > <...> > Substring search is just byte string search. > Properties 2, 3, and 4 imply that given a string of correctly > encoded UTF-8, the only way those bytes can appear in a > larger UTF-8 text is when they represent the same code points. > So you can use any 8-bit safe byte at a time > search function, like strchr or strstr, to run the search. > Однако, вместе с тем > UTF-8 does give up the ability to do random access using code > point indices. Programs that need to jump to the nth Unicode > code point in a file or on a line—text editors are > the canonical example—will typically convert incoming UTF-8 to an internal representation > like an array of code points and then convert back to > UTF-8 for output, but most programs are simpler when written to > manipulate UTF-8 directly. (c) Russ Cox, http://research.swtch.com/2010/03/utf-8-bits-bytes-and-benefits.html
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