Re: [Boost-users] Translating an absolute path to a path relative to the current directory

From: Hermann Rodrigues (hermann.rodrigues_at_[hidden])
Date: 2005-11-06 10:33:57

Thank you for you reply.

I was currently using PathToRelativePath on Windows, pointed by
Gottlob Frege. However, your solution is portable and also seems to
work a Linux environment.

I will definitely try it.

Regards,

Hermann

On 11/3/05, Simon Buchan <simon_at_[hidden]> wrote:
> Try this...
>
> path relative_to_current(path p)
> {
>         path current = current_path();
>
>         // Trivial case
>         if(equivalent(current, p)) return p;
>
>         // Doesn't share a root
>         if(!equivalent(current.root_path(), p.root_path()))
>                 return p;
>
>         // We don't care about the root anymore
>         // (and makes the rest easier)
>         current = current.relative_path();
>         p = p.relative_path();
>
>         path final(".", native);
>
>         path::iterator pit = p.begin(),
>                        cit = current.begin();
>         // Find the shared directory
>         for(;pit != p.end() && cit != current.end(); ++pit, ++cit)
>                 if(*pit != *cit) // May not be right
>                         break;
>
>         // Put needed parent dirs in
>         while(cit != current.end())
>         {
>                 final = ".." / final;
>                 ++cit;
>         }
>
>         // Add the path from shared
>         while(pit != p.end())
>                 // Gah! Why doesn't *path::iterator return paths?
>                 final /= path(*pit++, native);
>
>         // .normalize()?
>         return final;
> }
>
> Haven't tested it too extensively, but it seems to work. Probably better
> as relative_path(path from, path to), but hey.
>
> --
> don't quote this
>
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>