1/*******************************************************************************
2 *
3 * Module Name: nsnames - Name manipulation and search
4 *
5 ******************************************************************************/
6
7/******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************/
115
116#define __NSNAMES_C__
117
118#include <contrib/dev/acpica/include/acpi.h>
119#include <contrib/dev/acpica/include/accommon.h>
120#include <contrib/dev/acpica/include/amlcode.h>
121#include <contrib/dev/acpica/include/acnamesp.h>
122
123
124#define _COMPONENT ACPI_NAMESPACE
125 ACPI_MODULE_NAME ("nsnames")
126
127
128/*******************************************************************************
129 *
130 * FUNCTION: AcpiNsBuildExternalPath
131 *
132 * PARAMETERS: Node - NS node whose pathname is needed
133 * Size - Size of the pathname
134 * *NameBuffer - Where to return the pathname
135 *
136 * RETURN: Status
137 * Places the pathname into the NameBuffer, in external format
138 * (name segments separated by path separators)
139 *
140 * DESCRIPTION: Generate a full pathaname
141 *
142 ******************************************************************************/
143
144ACPI_STATUS
145AcpiNsBuildExternalPath (
146 ACPI_NAMESPACE_NODE *Node,
147 ACPI_SIZE Size,
148 char *NameBuffer)
149{
150 ACPI_SIZE Index;
151 ACPI_NAMESPACE_NODE *ParentNode;
152
153
154 ACPI_FUNCTION_ENTRY ();
155
156
157 /* Special case for root */
158
159 Index = Size - 1;
160 if (Index < ACPI_NAME_SIZE)
161 {
162 NameBuffer[0] = AML_ROOT_PREFIX;
163 NameBuffer[1] = 0;
164 return (AE_OK);
165 }
166
167 /* Store terminator byte, then build name backwards */
168
169 ParentNode = Node;
170 NameBuffer[Index] = 0;
171
172 while ((Index > ACPI_NAME_SIZE) && (ParentNode != AcpiGbl_RootNode))
173 {
174 Index -= ACPI_NAME_SIZE;
175
176 /* Put the name into the buffer */
177
178 ACPI_MOVE_32_TO_32 ((NameBuffer + Index), &ParentNode->Name);
179 ParentNode = AcpiNsGetParentNode (ParentNode);
180
181 /* Prefix name with the path separator */
182
183 Index--;
184 NameBuffer[Index] = ACPI_PATH_SEPARATOR;
185 }
186
187 /* Overwrite final separator with the root prefix character */
188
189 NameBuffer[Index] = AML_ROOT_PREFIX;
190
191 if (Index != 0)
192 {
193 ACPI_ERROR ((AE_INFO,
194 "Could not construct external pathname; index=%X, size=%X, Path=%s",
195 (UINT32) Index, (UINT32) Size, &NameBuffer[Size]));
196
197 return (AE_BAD_PARAMETER);
198 }
199
200 return (AE_OK);
201}
202
203
204/*******************************************************************************
205 *
206 * FUNCTION: AcpiNsGetExternalPathname
207 *
208 * PARAMETERS: Node - Namespace node whose pathname is needed
209 *
210 * RETURN: Pointer to storage containing the fully qualified name of
211 * the node, In external format (name segments separated by path
212 * separators.)
213 *
214 * DESCRIPTION: Used to obtain the full pathname to a namespace node, usually
215 * for error and debug statements.
216 *
217 ******************************************************************************/
218
219char *
220AcpiNsGetExternalPathname (
221 ACPI_NAMESPACE_NODE *Node)
222{
223 ACPI_STATUS Status;
224 char *NameBuffer;
225 ACPI_SIZE Size;
226
227
228 ACPI_FUNCTION_TRACE_PTR (NsGetExternalPathname, Node);
229
230
231 /* Calculate required buffer size based on depth below root */
232
233 Size = AcpiNsGetPathnameLength (Node);
234 if (!Size)
235 {
236 return_PTR (NULL);
237 }
238
239 /* Allocate a buffer to be returned to caller */
240
241 NameBuffer = ACPI_ALLOCATE_ZEROED (Size);
242 if (!NameBuffer)
243 {
244 ACPI_ERROR ((AE_INFO, "Could not allocate %u bytes", (UINT32) Size));
245 return_PTR (NULL);
246 }
247
248 /* Build the path in the allocated buffer */
249
250 Status = AcpiNsBuildExternalPath (Node, Size, NameBuffer);
251 if (ACPI_FAILURE (Status))
252 {
253 ACPI_FREE (NameBuffer);
254 return_PTR (NULL);
255 }
256
257 return_PTR (NameBuffer);
258}
259
260
261/*******************************************************************************
262 *
263 * FUNCTION: AcpiNsGetPathnameLength
264 *
265 * PARAMETERS: Node - Namespace node
266 *
267 * RETURN: Length of path, including prefix
268 *
269 * DESCRIPTION: Get the length of the pathname string for this node
270 *
271 ******************************************************************************/
272
273ACPI_SIZE
274AcpiNsGetPathnameLength (
275 ACPI_NAMESPACE_NODE *Node)
276{
277 ACPI_SIZE Size;
278 ACPI_NAMESPACE_NODE *NextNode;
279
280
281 ACPI_FUNCTION_ENTRY ();
282
283
284 /*
285 * Compute length of pathname as 5 * number of name segments.
286 * Go back up the parent tree to the root
287 */
288 Size = 0;
289 NextNode = Node;
290
291 while (NextNode && (NextNode != AcpiGbl_RootNode))
292 {
293 if (ACPI_GET_DESCRIPTOR_TYPE (NextNode) != ACPI_DESC_TYPE_NAMED)
294 {
295 ACPI_ERROR ((AE_INFO,
296 "Invalid Namespace Node (%p) while traversing namespace",
297 NextNode));
298 return 0;
299 }
300 Size += ACPI_PATH_SEGMENT_LENGTH;
301 NextNode = AcpiNsGetParentNode (NextNode);
302 }
303
304 if (!Size)
305 {
306 Size = 1; /* Root node case */
307 }
308
309 return (Size + 1); /* +1 for null string terminator */
310}
311
312
313/*******************************************************************************
314 *
315 * FUNCTION: AcpiNsHandleToPathname
316 *
317 * PARAMETERS: TargetHandle - Handle of named object whose name is
318 * to be found
319 * Buffer - Where the pathname is returned
320 *
321 * RETURN: Status, Buffer is filled with pathname if status is AE_OK
322 *
323 * DESCRIPTION: Build and return a full namespace pathname
324 *
325 ******************************************************************************/
326
327ACPI_STATUS
328AcpiNsHandleToPathname (
329 ACPI_HANDLE TargetHandle,
330 ACPI_BUFFER *Buffer)
331{
332 ACPI_STATUS Status;
333 ACPI_NAMESPACE_NODE *Node;
334 ACPI_SIZE RequiredSize;
335
336
337 ACPI_FUNCTION_TRACE_PTR (NsHandleToPathname, TargetHandle);
338
339
340 Node = AcpiNsMapHandleToNode (TargetHandle);
341 if (!Node)
342 {
343 return_ACPI_STATUS (AE_BAD_PARAMETER);
344 }
345
346 /* Determine size required for the caller buffer */
347
348 RequiredSize = AcpiNsGetPathnameLength (Node);
349 if (!RequiredSize)
350 {
351 return_ACPI_STATUS (AE_BAD_PARAMETER);
352 }
353
354 /* Validate/Allocate/Clear caller buffer */
355
356 Status = AcpiUtInitializeBuffer (Buffer, RequiredSize);
357 if (ACPI_FAILURE (Status))
358 {
359 return_ACPI_STATUS (Status);
360 }
361
362 /* Build the path in the caller buffer */
363
364 Status = AcpiNsBuildExternalPath (Node, RequiredSize, Buffer->Pointer);
365 if (ACPI_FAILURE (Status))
366 {
367 return_ACPI_STATUS (Status);
368 }
369
370 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s [%X]\n",
371 (char *) Buffer->Pointer, (UINT32) RequiredSize));
372 return_ACPI_STATUS (AE_OK);
373}
374
375
2 *
3 * Module Name: nsnames - Name manipulation and search
4 *
5 ******************************************************************************/
6
7/******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************/
115
116#define __NSNAMES_C__
117
118#include <contrib/dev/acpica/include/acpi.h>
119#include <contrib/dev/acpica/include/accommon.h>
120#include <contrib/dev/acpica/include/amlcode.h>
121#include <contrib/dev/acpica/include/acnamesp.h>
122
123
124#define _COMPONENT ACPI_NAMESPACE
125 ACPI_MODULE_NAME ("nsnames")
126
127
128/*******************************************************************************
129 *
130 * FUNCTION: AcpiNsBuildExternalPath
131 *
132 * PARAMETERS: Node - NS node whose pathname is needed
133 * Size - Size of the pathname
134 * *NameBuffer - Where to return the pathname
135 *
136 * RETURN: Status
137 * Places the pathname into the NameBuffer, in external format
138 * (name segments separated by path separators)
139 *
140 * DESCRIPTION: Generate a full pathaname
141 *
142 ******************************************************************************/
143
144ACPI_STATUS
145AcpiNsBuildExternalPath (
146 ACPI_NAMESPACE_NODE *Node,
147 ACPI_SIZE Size,
148 char *NameBuffer)
149{
150 ACPI_SIZE Index;
151 ACPI_NAMESPACE_NODE *ParentNode;
152
153
154 ACPI_FUNCTION_ENTRY ();
155
156
157 /* Special case for root */
158
159 Index = Size - 1;
160 if (Index < ACPI_NAME_SIZE)
161 {
162 NameBuffer[0] = AML_ROOT_PREFIX;
163 NameBuffer[1] = 0;
164 return (AE_OK);
165 }
166
167 /* Store terminator byte, then build name backwards */
168
169 ParentNode = Node;
170 NameBuffer[Index] = 0;
171
172 while ((Index > ACPI_NAME_SIZE) && (ParentNode != AcpiGbl_RootNode))
173 {
174 Index -= ACPI_NAME_SIZE;
175
176 /* Put the name into the buffer */
177
178 ACPI_MOVE_32_TO_32 ((NameBuffer + Index), &ParentNode->Name);
179 ParentNode = AcpiNsGetParentNode (ParentNode);
180
181 /* Prefix name with the path separator */
182
183 Index--;
184 NameBuffer[Index] = ACPI_PATH_SEPARATOR;
185 }
186
187 /* Overwrite final separator with the root prefix character */
188
189 NameBuffer[Index] = AML_ROOT_PREFIX;
190
191 if (Index != 0)
192 {
193 ACPI_ERROR ((AE_INFO,
194 "Could not construct external pathname; index=%X, size=%X, Path=%s",
195 (UINT32) Index, (UINT32) Size, &NameBuffer[Size]));
196
197 return (AE_BAD_PARAMETER);
198 }
199
200 return (AE_OK);
201}
202
203
204/*******************************************************************************
205 *
206 * FUNCTION: AcpiNsGetExternalPathname
207 *
208 * PARAMETERS: Node - Namespace node whose pathname is needed
209 *
210 * RETURN: Pointer to storage containing the fully qualified name of
211 * the node, In external format (name segments separated by path
212 * separators.)
213 *
214 * DESCRIPTION: Used to obtain the full pathname to a namespace node, usually
215 * for error and debug statements.
216 *
217 ******************************************************************************/
218
219char *
220AcpiNsGetExternalPathname (
221 ACPI_NAMESPACE_NODE *Node)
222{
223 ACPI_STATUS Status;
224 char *NameBuffer;
225 ACPI_SIZE Size;
226
227
228 ACPI_FUNCTION_TRACE_PTR (NsGetExternalPathname, Node);
229
230
231 /* Calculate required buffer size based on depth below root */
232
233 Size = AcpiNsGetPathnameLength (Node);
234 if (!Size)
235 {
236 return_PTR (NULL);
237 }
238
239 /* Allocate a buffer to be returned to caller */
240
241 NameBuffer = ACPI_ALLOCATE_ZEROED (Size);
242 if (!NameBuffer)
243 {
244 ACPI_ERROR ((AE_INFO, "Could not allocate %u bytes", (UINT32) Size));
245 return_PTR (NULL);
246 }
247
248 /* Build the path in the allocated buffer */
249
250 Status = AcpiNsBuildExternalPath (Node, Size, NameBuffer);
251 if (ACPI_FAILURE (Status))
252 {
253 ACPI_FREE (NameBuffer);
254 return_PTR (NULL);
255 }
256
257 return_PTR (NameBuffer);
258}
259
260
261/*******************************************************************************
262 *
263 * FUNCTION: AcpiNsGetPathnameLength
264 *
265 * PARAMETERS: Node - Namespace node
266 *
267 * RETURN: Length of path, including prefix
268 *
269 * DESCRIPTION: Get the length of the pathname string for this node
270 *
271 ******************************************************************************/
272
273ACPI_SIZE
274AcpiNsGetPathnameLength (
275 ACPI_NAMESPACE_NODE *Node)
276{
277 ACPI_SIZE Size;
278 ACPI_NAMESPACE_NODE *NextNode;
279
280
281 ACPI_FUNCTION_ENTRY ();
282
283
284 /*
285 * Compute length of pathname as 5 * number of name segments.
286 * Go back up the parent tree to the root
287 */
288 Size = 0;
289 NextNode = Node;
290
291 while (NextNode && (NextNode != AcpiGbl_RootNode))
292 {
293 if (ACPI_GET_DESCRIPTOR_TYPE (NextNode) != ACPI_DESC_TYPE_NAMED)
294 {
295 ACPI_ERROR ((AE_INFO,
296 "Invalid Namespace Node (%p) while traversing namespace",
297 NextNode));
298 return 0;
299 }
300 Size += ACPI_PATH_SEGMENT_LENGTH;
301 NextNode = AcpiNsGetParentNode (NextNode);
302 }
303
304 if (!Size)
305 {
306 Size = 1; /* Root node case */
307 }
308
309 return (Size + 1); /* +1 for null string terminator */
310}
311
312
313/*******************************************************************************
314 *
315 * FUNCTION: AcpiNsHandleToPathname
316 *
317 * PARAMETERS: TargetHandle - Handle of named object whose name is
318 * to be found
319 * Buffer - Where the pathname is returned
320 *
321 * RETURN: Status, Buffer is filled with pathname if status is AE_OK
322 *
323 * DESCRIPTION: Build and return a full namespace pathname
324 *
325 ******************************************************************************/
326
327ACPI_STATUS
328AcpiNsHandleToPathname (
329 ACPI_HANDLE TargetHandle,
330 ACPI_BUFFER *Buffer)
331{
332 ACPI_STATUS Status;
333 ACPI_NAMESPACE_NODE *Node;
334 ACPI_SIZE RequiredSize;
335
336
337 ACPI_FUNCTION_TRACE_PTR (NsHandleToPathname, TargetHandle);
338
339
340 Node = AcpiNsMapHandleToNode (TargetHandle);
341 if (!Node)
342 {
343 return_ACPI_STATUS (AE_BAD_PARAMETER);
344 }
345
346 /* Determine size required for the caller buffer */
347
348 RequiredSize = AcpiNsGetPathnameLength (Node);
349 if (!RequiredSize)
350 {
351 return_ACPI_STATUS (AE_BAD_PARAMETER);
352 }
353
354 /* Validate/Allocate/Clear caller buffer */
355
356 Status = AcpiUtInitializeBuffer (Buffer, RequiredSize);
357 if (ACPI_FAILURE (Status))
358 {
359 return_ACPI_STATUS (Status);
360 }
361
362 /* Build the path in the caller buffer */
363
364 Status = AcpiNsBuildExternalPath (Node, RequiredSize, Buffer->Pointer);
365 if (ACPI_FAILURE (Status))
366 {
367 return_ACPI_STATUS (Status);
368 }
369
370 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s [%X]\n",
371 (char *) Buffer->Pointer, (UINT32) RequiredSize));
372 return_ACPI_STATUS (AE_OK);
373}
374
375