//
// aegis - project change supervisor
// Copyright (C) 2001, 2003-2006, 2008, 2014 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 3 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 <libaegis/patch/context.h>


patch_context_ty::patch_context_ty(const input::pointer &arg) :
    in(arg)
{
}


patch_context_ty::~patch_context_ty()
{
}


string_ty *
patch_context_ty::getline(int n)
{
    if (n < 0)
        return 0;
    while (n >= (int)buffer.size())
    {
        nstring s;
        if (!in->one_line(s))
            return 0;
        buffer.push_back(s.get_ref());
    }
    return buffer[n];
}


void
patch_context_ty::discard(int n)
{
    while (n > 0 && !buffer.empty())
    {
        buffer.pop_front();
        --n;
    }
}


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