/*
 *	aegis - project change supervisor
 *	Copyright (C) 2001 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 gets
 */

#include <ac/stdlib.h>

#include <change/branch.h>
#include <error.h>
#include <project.h>


static void change_copyright_years_slurp _((change_ty *, int *, int , int *));

static void
change_copyright_years_slurp(cp, a, amax, alen_p)
	change_ty	*cp;
	int		*a;
	int		amax;
	int		*alen_p;
{
	int		j, k;
	int		n;
	cstate		cstate_data;
	cstate_copyright_years_list cylp;

	cstate_data = change_cstate_get(cp);
	cylp = cstate_data->copyright_years;
	if (!cylp)
		return;
	for (j = 0; j < cylp->length; ++j)
	{
		if (*alen_p >= amax)
			return;
		n = cylp->list[j];
		for (k = 0; k < *alen_p; ++k)
			if (a[k] == n)
				break;
		if (k >= *alen_p)
		{
			a[*alen_p] = n;
			++*alen_p;
		}
	}
}


static int change_copyright_years_cmp _((const void *, const void *));

static int
change_copyright_years_cmp(va, vb)
	const void	*va;
	const void	*vb;
{
	const int	*a;
	const int	*b;

	a = va;
	b = vb;
	return (*a - *b);
}


void
change_copyright_years_get(cp, a, amax, alen_p)
	change_ty	*cp;
	int		*a;
	int		amax;
	int		*alen_p;
{
	project_ty	*pp;

	/*
	 * Get the years specific to this change.
	 */
	assert(alen_p);
	*alen_p = 0;
	change_copyright_years_slurp(cp, a, amax, alen_p);

	/*
	 * Walk up the list of ancestors until we get to the trunk
	 * extracting the years specific to each branch.
	 */
	for (pp = cp->pp; pp; pp = pp->parent)
	{
		change_copyright_years_slurp
		(
			project_change_get(pp),
			a,
			amax,
			alen_p
		);
	}

	/*
	 * sort the years into ascending order
	 */
	if (*alen_p >= 2)
		qsort(a, *alen_p, sizeof(a[0]), change_copyright_years_cmp);
}