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/******************************************************************************

 *

 * Module Name: pstree - Parser op tree manipulation/traversal/search

 *

 *****************************************************************************/

/*

 * Copyright (C) 2000 - 2015, Intel Corp.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions, and the following disclaimer,

 *    without modification.

 * 2. Redistributions in binary form must reproduce at minimum a disclaimer

 *    substantially similar to the "NO WARRANTY" disclaimer below

 *    ("Disclaimer") and any redistribution must be conditioned upon

 *    including a substantially similar Disclaimer requirement for further

 *    binary redistribution.

 * 3. Neither the names of the above-listed copyright holders nor the names

 *    of any contributors may be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * Alternatively, this software may be distributed under the terms of the

 * GNU General Public License ("GPL") version 2 as published by the Free

 * Software Foundation.

 *

 * NO WARRANTY

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGES.

 */

#include 

#include "accommon.h"

#include "acparser.h"

#include "amlcode.h"

#define _COMPONENT          ACPI_PARSER

ACPI_MODULE_NAME("pstree")

/* Local prototypes */

#ifdef ACPI_OBSOLETE_FUNCTIONS

union acpi_parse_object *acpi_ps_get_child(union acpi_parse_object *op);

#endif

/*******************************************************************************

 *

 * FUNCTION:    acpi_ps_get_arg

 *

 * PARAMETERS:  op              - Get an argument for this op

 *              argn            - Nth argument to get

 *

 * RETURN:      The argument (as an Op object). NULL if argument does not exist

 *

 * DESCRIPTION: Get the specified op's argument.

 *

 ******************************************************************************/

union acpi_parse_object *acpi_ps_get_arg(union acpi_parse_object *op, u32 argn)

{

	union acpi_parse_object *arg = NULL;

	const struct acpi_opcode_info *op_info;

	ACPI_FUNCTION_ENTRY();

/*

	if (Op->Common.aml_opcode == AML_INT_CONNECTION_OP)

	{

		return (Op->Common.Value.Arg);

	}

*/

	/* Get the info structure for this opcode */

	op_info = acpi_ps_get_opcode_info(op->common.aml_opcode);

	if (op_info->class == AML_CLASS_UNKNOWN) {

		/* Invalid opcode or ASCII character */

		return (NULL);

	}

	/* Check if this opcode requires argument sub-objects */

	if (!(op_info->flags & AML_HAS_ARGS)) {

		/* Has no linked argument objects */

		return (NULL);

	}

	/* Get the requested argument object */

	arg = op->common.value.arg;

	while (arg && argn) {

		argn--;

		arg = arg->common.next;

	}

	return (arg);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ps_append_arg

 *

 * PARAMETERS:  op              - Append an argument to this Op.

 *              arg             - Argument Op to append

 *

 * RETURN:      None.

 *

 * DESCRIPTION: Append an argument to an op's argument list (a NULL arg is OK)

 *

 ******************************************************************************/

void

acpi_ps_append_arg(union acpi_parse_object *op, union acpi_parse_object *arg)

{

	union acpi_parse_object *prev_arg;

	const struct acpi_opcode_info *op_info;

	ACPI_FUNCTION_ENTRY();

	if (!op) {

		return;

	}

	/* Get the info structure for this opcode */

	op_info = acpi_ps_get_opcode_info(op->common.aml_opcode);

	if (op_info->class == AML_CLASS_UNKNOWN) {

		/* Invalid opcode */

		ACPI_ERROR((AE_INFO, "Invalid AML Opcode: 0x%2.2X",

			    op->common.aml_opcode));

		return;

	}

	/* Check if this opcode requires argument sub-objects */

	if (!(op_info->flags & AML_HAS_ARGS)) {

		/* Has no linked argument objects */

		return;

	}

	/* Append the argument to the linked argument list */

	if (op->common.value.arg) {

		/* Append to existing argument list */

		prev_arg = op->common.value.arg;

		while (prev_arg->common.next) {

			prev_arg = prev_arg->common.next;

		}

		prev_arg->common.next = arg;

	} else {

		/* No argument list, this will be the first argument */

		op->common.value.arg = arg;

	}

	/* Set the parent in this arg and any args linked after it */

	while (arg) {

		arg->common.parent = op;

		arg = arg->common.next;

		op->common.arg_list_length++;

	}

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ps_get_depth_next

 *

 * PARAMETERS:  origin          - Root of subtree to search

 *              op              - Last (previous) Op that was found

 *

 * RETURN:      Next Op found in the search.

 *

 * DESCRIPTION: Get next op in tree (walking the tree in depth-first order)

 *              Return NULL when reaching "origin" or when walking up from root

 *

 ******************************************************************************/

union acpi_parse_object *acpi_ps_get_depth_next(union acpi_parse_object *origin,

						union acpi_parse_object *op)

{

	union acpi_parse_object *next = NULL;

	union acpi_parse_object *parent;

	union acpi_parse_object *arg;

	ACPI_FUNCTION_ENTRY();

	if (!op) {

		return (NULL);

	}

	/* Look for an argument or child */

	next = acpi_ps_get_arg(op, 0);

	if (next) {

		return (next);

	}

	/* Look for a sibling */

	next = op->common.next;

	if (next) {

		return (next);

	}

	/* Look for a sibling of parent */

	parent = op->common.parent;

	while (parent) {

		arg = acpi_ps_get_arg(parent, 0);

		while (arg && (arg != origin) && (arg != op)) {

			arg = arg->common.next;

		}

		if (arg == origin) {

			/* Reached parent of origin, end search */

			return (NULL);

		}

		if (parent->common.next) {

			/* Found sibling of parent */

			return (parent->common.next);

		}

		op = parent;

		parent = parent->common.parent;

	}

	return (next);

}

#ifdef ACPI_OBSOLETE_FUNCTIONS

/*******************************************************************************

 *

 * FUNCTION:    acpi_ps_get_child

 *

 * PARAMETERS:  op              - Get the child of this Op

 *

 * RETURN:      Child Op, Null if none is found.

 *

 * DESCRIPTION: Get op's children or NULL if none

 *

 ******************************************************************************/

union acpi_parse_object *acpi_ps_get_child(union acpi_parse_object *op)

{

	union acpi_parse_object *child = NULL;

	ACPI_FUNCTION_ENTRY();

	switch (op->common.aml_opcode) {

	case AML_SCOPE_OP:

	case AML_ELSE_OP:

	case AML_DEVICE_OP:

	case AML_THERMAL_ZONE_OP:

	case AML_INT_METHODCALL_OP:

		child = acpi_ps_get_arg(op, 0);

		break;

	case AML_BUFFER_OP:

	case AML_PACKAGE_OP:

	case AML_METHOD_OP:

	case AML_IF_OP:

	case AML_WHILE_OP:

	case AML_FIELD_OP:

		child = acpi_ps_get_arg(op, 1);

		break;

	case AML_POWER_RES_OP:

	case AML_INDEX_FIELD_OP:

		child = acpi_ps_get_arg(op, 2);

		break;

	case AML_PROCESSOR_OP:

	case AML_BANK_FIELD_OP:

		child = acpi_ps_get_arg(op, 3);

		break;

	default:

		/* All others have no children */

		break;

	}

	return (child);

}

#endif