lib/arglex/source/file.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/arglex/source/file.h>
#include <lib/input/file.h>
#include <lib/rcstring/accumulator.h>


arglex_source_file::~arglex_source_file()
{
}


arglex_source_file::arglex_source_file(const rcstring &filename) :
    ip(input_file::create(filename))
{
    // ip = input_remove_escaped_newlines::create(ip);
    // ip = input_remove_comments::create(ip);
}


arglex_source_file::pointer
arglex_source_file::create(const rcstring &filename)
{
    return pointer(new arglex_source_file(filename));
}


bool
arglex_source_file::next(source_location &locn, rcstring &result)
{
    for (;;)
    {
        locn = ip->get_source_location();
        int c = ip->get();
        if (c == input::eof)
            return false;
        if (isspace(c))
            continue;
        // Each argument is separated by white space.
        // There is no quoting mechanism.
        rcstring_accumulator acc;
        for (;;)
        {
            acc.push_back((unsigned char)c);
            c = ip->get();
            if (c == input::eof)
                break;
            if (isspace(c))
                break;
        }
        result = acc.mkstr();
        return true;
    }
}


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