/*
 *	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 pconfs
 */

#include <aer/value/pconf.h>
#include <change.h>
#include <error.h> /* for assert */
#include <pconf.h>
#include <trace.h>


typedef struct rpt_value_pconf_ty rpt_value_pconf_ty;
struct rpt_value_pconf_ty
{
	RPT_VALUE
	change_ty	*cp;
	rpt_value_ty	*value;
};


static void destruct _((rpt_value_ty *));

static void
destruct(vp)
	rpt_value_ty	*vp;
{
	rpt_value_pconf_ty *this;

	trace(("rpt_value_pconf::destruct(vp = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_pconf_ty *)vp;
	if (this->value)
		rpt_value_free(this->value);
	change_free(this->cp);
	trace((/*{*/"}\n"));
}


static void grab _((rpt_value_pconf_ty *));

static void
grab(this)
	rpt_value_pconf_ty *this;
{
	pconf		pconf_data;

	/*
	 * construct the project config file's value, assuming it exists
	 */
	trace(("rpt_value_pconf::grab(this = %08lX)\n{\n"/*}*/, (long)this));
	assert(!this->value);
	assert(this->cp);
	pconf_data = change_pconf_get(this->cp, 0);

	/*
	 * create the result value
	 */
	this->value = pconf_type.convert(&pconf_data);
	assert(this->value);
	assert(this->value->method->type == rpt_value_type_structure);

	/*
	 * clean up and go home
	 */
	trace(("this->value = %08lX;\n", (long)this->value));
	trace((/*{*/"}\n"));
}


static rpt_value_ty *lookup _((rpt_value_ty *, rpt_value_ty *, int));

static rpt_value_ty *
lookup(vp, rhs, lval)
	rpt_value_ty	*vp;
	rpt_value_ty	*rhs;
	int		lval;
{
	rpt_value_pconf_ty *this;
	rpt_value_ty	*result;

	trace(("rpt_value_pconf::lookup(this = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_pconf_ty *)vp;
	if (!this->value)
		grab(this);
	assert(this->value);
	if (this->value->method->type == rpt_value_type_error)
		result = rpt_value_copy(this->value);
	else
		result = rpt_value_lookup(this->value, rhs, lval);
	trace(("return %08lX;\n", (long)result));
	trace((/*{*/"}\n"));
	return result;
}


static rpt_value_ty *keys _((rpt_value_ty *));

static rpt_value_ty *
keys(vp)
	rpt_value_ty	*vp;
{
	rpt_value_pconf_ty *this;
	rpt_value_ty	*result;

	trace(("rpt_value_pconf::keys(this = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_pconf_ty *)vp;
	if (!this->value)
		grab(this);
	assert(this->value);
	if (this->value->method->type == rpt_value_type_error)
		result = rpt_value_copy(this->value);
	else
		result = rpt_value_keys(this->value);
	trace(("return %08lX;\n", (long)result));
	trace((/*{*/"}\n"));
	return result;
}


static rpt_value_ty *count _((rpt_value_ty *));

static rpt_value_ty *
count(vp)
	rpt_value_ty	*vp;
{
	rpt_value_pconf_ty *this;
	rpt_value_ty	*result;

	trace(("rpt_value_pconf::count(this = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_pconf_ty *)vp;
	if (!this->value)
		grab(this);
	assert(this->value);
	if (this->value->method->type == rpt_value_type_error)
		result = rpt_value_copy(this->value);
	else
		result = rpt_value_count(this->value);
	trace(("return %08lX;\n", (long)result));
	trace((/*{*/"}\n"));
	return result;
}


static char *type_of _((rpt_value_ty *));

static char *
type_of(vp)
	rpt_value_ty	*vp;
{
	rpt_value_pconf_ty *this;
	char		*result;

	trace(("rpt_value_pconf::type_of(this = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_pconf_ty *)vp;
	if (!this->value)
		grab(this);
	assert(this->value);
	result = rpt_value_typeof(this->value);
	trace(("return \"%s\";\n", result));
	trace((/*{*/"}\n"));
	return result;
}


static rpt_value_ty *undefer _((rpt_value_ty *));

static rpt_value_ty *
undefer(vp)
	rpt_value_ty	*vp;
{
	rpt_value_pconf_ty *this;
	rpt_value_ty	*result;

	trace(("rpt_value_pconf::undefer(this = %08lX)\n{\n"/*}*/, (long)vp));
	this = (rpt_value_pconf_ty *)vp;
	if (!this->value)
		grab(this);
	assert(this->value);
	result = rpt_value_copy(this->value);
	trace(("return \"%s\";\n", result));
	trace((/*{*/"}\n"));
	return result;
}


static rpt_value_method_ty method =
{
	sizeof(rpt_value_pconf_ty),
	"pconf",
	rpt_value_type_deferred,
	0, /* construct */
	destruct,
	0, /* arithmetic */
	0, /* stringize */
	0, /* booleanize */
	lookup,
	keys,
	count,
	type_of,
	undefer,
};


rpt_value_ty *
rpt_value_pconf(cp)
	change_ty	*cp;
{
	rpt_value_pconf_ty *this;

	this = (rpt_value_pconf_ty *)rpt_value_alloc(&method);
	this->cp = change_copy(cp);
	this->value = 0;
	return (rpt_value_ty *)this;
}