[boost] Proposal for String Algorithms Library [CODE]

From: zaufi_at_[hidden]
Date: 2004-07-22 00:46:59

----------  Forwarded Message  ----------

Subject: Proposal for String Algorithms Library
Date: Thursday 22 July 2004 09:43
From: zaufi_at_[hidden]
To: boost_at_[hidden]

hi boosters

I would like to propose one more algorithm to SAL -- squeeze. It removes
leading/trailing spaces and duplicate spaces between words. So sample string
"  This       is    \n\n   a test   \n" become "This is\na test". I use this
function with XML/HTML related code to 'normalize' content... Hope this will
help to smbd else ;)

Have fun!

-------------------------------------------------------
Oops. Forget to paste code... ;)

<squeeze.cc>

 std::string squeeze(const std::string& str)
    {
        std::string out;
        //
        bool is_start_of_line = true;
        char last_space = 0;
        for (std::string::const_iterator i = str.begin(); i != str.end(); ++i)
        {
            if (std::isspace(*i))
                last_space = int(!is_start_of_line)
                           * (int(*i == '\n') * '\n'
                            + int((*i != '\n') & (last_space != '\n')) * ' '
                            + int(last_space == '\n') * last_space);
            else
            {
                if (last_space)
                {
                    out.push_back(last_space);
                    last_space = 0;
                }
                out.push_back(*i);
                is_start_of_line = false;
            }
        }
        return out;
    }
</squeeze.cc>