I apologize for leading you the wrong way Luca! -Luther
On Thu, Mar 21, 2013 at 9:46 AM, Luca Ciciriello < luca_cicirie...@hotmail.com> wrote: > Ok, thanks. > > Luca. > > On Mar 21, 2013, at 3:43 PM, Glenn L. Austin <gl...@austin-soft.com> > wrote: > > > > > On Mar 21, 2013, at 2:34 AM, Jean-Daniel Dupas <devli...@shadowlab.org> > wrote: > > > >> > >> Le 21 mars 2013 à 09:27, Luca Ciciriello <luca_cicirie...@hotmail.com> > a écrit : > >> > >>> Hi all. > >>> I'm using in my iOS project some Objective-C++ modules. Here I have > some conversion from NSString to C++11 std::string. After this conversion I > found (correctly) in my std::string some 2-byte characters. > >>> My question is: How can I count the number of chars and not the > numbers of byte in my std::string? > >>> > >> > >> Don't use std::string to store unicode string. They are not design to > support such content. > >> > >> You can use std::wstring instead. > > > > > > Actually, std::string works *just fine* for UTF-8 strings. > > > > It's just that, in Unicode, 1 character doesn't necessarily fit in 1 > byte. Also, you can't easily do truncation of strings (you might be > truncating the string in the middle of a multi-byte sequence -- which is > true in pretty much every encoding except UCS-4). > > > > UTF-8 is relatively easy to work with, however. You look at the > previous byte in the string to see if your current character is part of a > multi-byte sequence or not -- and keep going back until you find one that > doesn't have the high-bit set, and that's the last character of the > previous sequence. Of course, that "go back" doesn't mean anything if > you're already at the first byte in your string... > > > > -- > > Glenn L. Austin, Computer Wizard and Race Car Driver <>< > > <http://www.austin-soft.com> > > > > > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/lutherbaker%40gmail.com > > This email sent to lutherba...@gmail.com > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
