/*
 *	aegis - project change supervisor
 *	Copyright (C) 1999, 2002, 2003 Peter Miller;
 *	All rights reserved.
 *
 *	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, write to the Free Software
 *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: functions to manipulate nths
 */

#include <project/file.h>
#include <project/file/list_get.h>
#include <error.h> /* for assert */
#include <str_list.h>
#include <trace.h>


fstate_src_ty *
project_file_nth(project_ty *pp, size_t n, view_path_ty as_view_path)
{
    string_list_ty  *wlp;
    fstate_src_ty   *src_data;

    trace(("project_file_nth(pp = %8.8lX, n = %ld)\n{\n", (long)pp, (long)n));
    /* do not free wlp, it's cached */
    wlp = project_file_list_get(pp, as_view_path);

    if (n < wlp->nstrings)
    {
	trace(("%s\n", wlp->string[n]->str_text));
	src_data = project_file_find(pp, wlp->string[n], as_view_path);

	/*
	 * If this assert fails, it means thato project_file_list_get and
	 * project_file_find are interpreting the view path differently.
	 */
	assert(src_data);
    }
    else
	src_data = 0;
    trace(("return %8.8lX;\n", (long)src_data));
    trace(("}\n"));
    return src_data;
}
