ReactOS  0.4.14-dev-376-gaedba84
pswalk.c
Go to the documentation of this file.
1 /******************************************************************************
2  *
3  * Module Name: pswalk - Parser routines to walk parsed op tree(s)
4  *
5  *****************************************************************************/
6 
7 /*
8  * Copyright (C) 2000 - 2019, Intel Corp.
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  * notice, this list of conditions, and the following disclaimer,
16  * without modification.
17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18  * substantially similar to the "NO WARRANTY" disclaimer below
19  * ("Disclaimer") and any redistribution must be conditioned upon
20  * including a substantially similar Disclaimer requirement for further
21  * binary redistribution.
22  * 3. Neither the names of the above-listed copyright holders nor the names
23  * of any contributors may be used to endorse or promote products derived
24  * from this software without specific prior written permission.
25  *
26  * Alternatively, this software may be distributed under the terms of the
27  * GNU General Public License ("GPL") version 2 as published by the Free
28  * Software Foundation.
29  *
30  * NO WARRANTY
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41  * POSSIBILITY OF SUCH DAMAGES.
42  */
43 
44 #include "acpi.h"
45 #include "accommon.h"
46 #include "acparser.h"
47 
48 #define _COMPONENT ACPI_PARSER
49  ACPI_MODULE_NAME ("pswalk")
50 
51 
52 /*******************************************************************************
53  *
54  * FUNCTION: AcpiPsDeleteParseTree
55  *
56  * PARAMETERS: SubtreeRoot - Root of tree (or subtree) to delete
57  *
58  * RETURN: None
59  *
60  * DESCRIPTION: Delete a portion of or an entire parse tree.
61  *
62  ******************************************************************************/
63 
64 #include "amlcode.h"
65 
66 void
68  ACPI_PARSE_OBJECT *SubtreeRoot)
69 {
70  ACPI_PARSE_OBJECT *Op = SubtreeRoot;
71  ACPI_PARSE_OBJECT *Next = NULL;
73  UINT32 Level = 0;
74 
75 
76  ACPI_FUNCTION_TRACE_PTR (PsDeleteParseTree, SubtreeRoot);
77 
79  " root %p\n", SubtreeRoot));
80 
81  /* Visit all nodes in the subtree */
82 
83  while (Op)
84  {
85  if (Op != Parent)
86  {
87  /* This is the descending case */
88 
90  {
91  /* This debug option will print the entire parse tree */
92 
93  AcpiOsPrintf (" %*.s%s %p", (Level * 4), " ",
94  AcpiPsGetOpcodeName (Op->Common.AmlOpcode), Op);
95 
96  if (Op->Named.AmlOpcode == AML_INT_NAMEPATH_OP)
97  {
98  AcpiOsPrintf (" %4.4s", Op->Common.Value.String);
99  }
100  if (Op->Named.AmlOpcode == AML_STRING_OP)
101  {
102  AcpiOsPrintf (" %s", Op->Common.Value.String);
103  }
104  AcpiOsPrintf ("\n");
105  }
106 
107  /* Look for an argument or child of the current op */
108 
109  Next = AcpiPsGetArg (Op, 0);
110  if (Next)
111  {
112  /* Still going downward in tree (Op is not completed yet) */
113 
114  Op = Next;
115  Level++;
116  continue;
117  }
118  }
119 
120  /* No more children, this Op is complete. */
121 
122  Next = Op->Common.Next;
123  Parent = Op->Common.Parent;
124 
125  AcpiPsFreeOp (Op);
126 
127  /* If we are back to the starting point, the walk is complete. */
128 
129  if (Op == SubtreeRoot)
130  {
131  return_VOID;
132  }
133 
134  if (Next)
135  {
136  Op = Next;
137  }
138  else
139  {
140  Level--;
141  Op = Parent;
142  }
143  }
144 
145  return_VOID;
146 }
ACPI_PARSE_OBJ_COMMON Common
Definition: aclocal.h:1078
const char * AcpiPsGetOpcodeName(UINT16 Opcode)
Definition: psopinfo.c:169
_IRQL_requires_same_ typedef _In_ ULONG _In_ UCHAR Level
Definition: wmitypes.h:55
#define _COMPONENT
Definition: pswalk.c:48
ACPI_PHYSICAL_ADDRESS ACPI_SIZE BOOLEAN Warn BOOLEAN Physical UINT32 ACPI_TABLE_HEADER *OutTableHeader ACPI_TABLE_HEADER **OutTable ACPI_HANDLE UINT32 ACPI_WALK_CALLBACK ACPI_WALK_CALLBACK void void **ReturnValue UINT32 ACPI_BUFFER *RetPathPtr ACPI_OBJECT_HANDLER void *Data ACPI_OBJECT_HANDLER void **Data ACPI_STRING ACPI_OBJECT_LIST ACPI_BUFFER *ReturnObjectBuffer ACPI_DEVICE_INFO **ReturnBuffer ACPI_HANDLE Parent
Definition: acpixf.h:728
#define AML_INT_NAMEPATH_OP
Definition: amlcode.h:205
#define AML_STRING_OP
Definition: amlcode.h:58
unsigned int UINT32
#define ACPI_MODULE_NAME(Name)
Definition: acoutput.h:216
smooth NULL
Definition: ftsmooth.c:416
#define ACPI_FUNCTION_TRACE_PTR(a, b)
Definition: acoutput.h:481
ACPI_PARSE_OBJ_NAMED Named
Definition: aclocal.h:1079
#define ACPI_DB_PARSE_TREES
Definition: acoutput.h:172
#define ACPI_DEBUG_PRINT(pl)
Definition: acoutput.h:475
#define ACPI_LV_PARSE_TREES
Definition: acoutput.h:119
#define return_VOID
Definition: acoutput.h:495
void ACPI_INTERNAL_VAR_XFACE AcpiOsPrintf(const char *Format,...)
Definition: osl.c:851
ACPI_PARSE_OBJECT * AcpiPsGetArg(ACPI_PARSE_OBJECT *op, UINT32 argn)
Definition: pstree.c:76
void AcpiPsFreeOp(ACPI_PARSE_OBJECT *Op)
Definition: psutils.c:212
#define ACPI_IS_DEBUG_ENABLED(Level, Component)
Definition: acoutput.h:490
void AcpiPsDeleteParseTree(ACPI_PARSE_OBJECT *SubtreeRoot)
Definition: pswalk.c:67