著者: ph10 日付: To: ND CC: Pcre-dev 題目: Re: [pcre-dev] Return last bumpalong offset in partial_hard matching
On Sun, 17 Feb 2013, ND wrote:
> It's one more thing. I don't sure that this algorithm (keeping start with
> ovector[0]-max_lookbehind) will work right in unicode case. I don't strongly
> understand what will be happen. In documentation I read than max_lookbehind
> returns symbols (not bytes) amount.
Correct. It returns a character (not byte) count, because this is what
is needed when doing a lookbehind. Just subtracting it from the starting
point is no good; you have to "walk" back along the string for that many
characters in the Unicode case.
