//
//	aegis - project change supervisor
//	Copyright (C) 1999, 2001-2008 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/change.h>
#include <common/error.h> // for assert
#include <common/gmatch.h>
#include <libaegis/sub.h>
#include <common/trace.h>
#include <libaegis/uname.h>


string_ty *
change_architecture_name(change::pointer cp, int with_arch)
{
    trace(("change_architecture_name(cp = %8.8lX)\n{\n", (long)cp));
    assert(cp->reference_count >= 1);
    if (!cp->architecture_name)
    {
	pconf_ty        *pconf_data;
	size_t		j;
	string_ty	*result;
	string_ty       *un;
	string_ty       *discriminator;

	pconf_data = change_pconf_get(cp, 0);
	assert(pconf_data->architecture);
	un = uname_variant_get();

	//
	// The architecture discriminator gets added to the end of the
	// architecture string formed using the uname system call.
	//
	discriminator = change_run_architecture_discriminator_command(cp);
	if (discriminator)
	{
	    string_ty       *dash;

	    dash = str_from_c("-");
	    un = str_cat_three(un, dash, discriminator);
	    str_free(dash);
	}
	else
	    un = str_copy(un);

	result = 0;
	for (j = 0; j < pconf_data->architecture->length; ++j)
	{
	    pconf_architecture_ty *ap;

	    ap = pconf_data->architecture->list[j];
	    assert(ap->name);
	    assert(ap->pattern);
	    if (gmatch(ap->pattern->str_text, un->str_text))
	    {
		if (ap->mode == pconf_architecture_mode_forbidden)
		{
		    sub_context_ty	*scp;

		    scp = sub_context_new();
		    sub_var_set_string(scp, "Name", un);
		    change_fatal
		    (
			cp,
			scp,
			i18n("architecture \"$name\" forbidden")
		    );
		    // NOTREACHED
		    sub_context_delete(scp);
		}
		result = ap->name;
		break;
	    }
	}
	str_free(un);
	if (!result && with_arch)
	{
	    sub_context_ty	*scp;

	    scp = sub_context_new();
	    sub_var_set_string(scp, "Name", un);
	    change_fatal(cp, scp, i18n("architecture \"$name\" unknown"));
	    // NOTREACHED
	    sub_context_delete(scp);
	}
	cp->architecture_name = result;
    }
    trace_string(cp->architecture_name ? cp->architecture_name->str_text : "");
    trace(("}\n"));
    return cp->architecture_name;
}