lib/rcstring/trim.cc

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//
// nis-util - NIS Administration Utilities
// Copyright (C) 2012 Peter Miller
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or (at
// your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. If not, see <http://www.gnu.org/licenses/>.
//

#include <lib/ac/ctype.h>

#include <lib/rcstring.h>
#include <lib/rcstring/accumulator.h>


rcstring
rcstring::trim(void)
    const
{
    rcstring_accumulator acc;
    const char *cp = c_str();
    while (isspace((unsigned char)*cp))
        ++cp;
    bool insert_one_space = false;
    for (;;)
    {
        unsigned char c = *cp++;
        if (!c)
            return acc.mkstr();
        if (isspace(c))
            insert_one_space = true;
        else
        {
            if (insert_one_space)
                acc.push_back(' ');
            acc.push_back(c);
            insert_one_space = false;
        }
    }
}


// vim: set ts=8 sw=4 et :