13 * All rights reserved.
14 *
15 * 2. License
16 *
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
20 * property rights.
21 *
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
28 *
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
37 *
38 * The above copyright and patent license is granted only if the following
39 * conditions are met:
40 *
41 * 3. Conditions
42 *
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
54 *
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
65 * make.
66 *
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3.4. Intel retains all right, title, and interest in and to the Original
74 * Intel Code.
75 *
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
80 *
81 * 4. Disclaimer and Export Compliance
82 *
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
89 * PARTICULAR PURPOSE.
90 *
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
98 * LIMITED REMEDY.
99 *
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
114 *
115 *****************************************************************************/
116
117
118#define __PSTREE_C__
119
120#include "acpi.h"
121#include "acparser.h"
122#include "amlcode.h"
123
124#define _COMPONENT ACPI_PARSER
125 ACPI_MODULE_NAME ("pstree")
126
127
128/*******************************************************************************
129 *
130 * FUNCTION: AcpiPsGetArg
131 *
132 * PARAMETERS: Op - Get an argument for this op
133 * Argn - Nth argument to get
134 *
135 * RETURN: The argument (as an Op object). NULL if argument does not exist
136 *
137 * DESCRIPTION: Get the specified op's argument.
138 *
139 ******************************************************************************/
140
141ACPI_PARSE_OBJECT *
142AcpiPsGetArg (
143 ACPI_PARSE_OBJECT *Op,
144 UINT32 Argn)
145{
146 ACPI_PARSE_OBJECT *Arg = NULL;
147 const ACPI_OPCODE_INFO *OpInfo;
148
149
150 ACPI_FUNCTION_ENTRY ();
151
152
153 /* Get the info structure for this opcode */
154
155 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
156 if (OpInfo->Class == AML_CLASS_UNKNOWN)
157 {
158 /* Invalid opcode or ASCII character */
159
160 return (NULL);
161 }
162
163 /* Check if this opcode requires argument sub-objects */
164
165 if (!(OpInfo->Flags & AML_HAS_ARGS))
166 {
167 /* Has no linked argument objects */
168
169 return (NULL);
170 }
171
172 /* Get the requested argument object */
173
174 Arg = Op->Common.Value.Arg;
175 while (Arg && Argn)
176 {
177 Argn--;
178 Arg = Arg->Common.Next;
179 }
180
181 return (Arg);
182}
183
184
185/*******************************************************************************
186 *
187 * FUNCTION: AcpiPsAppendArg
188 *
189 * PARAMETERS: Op - Append an argument to this Op.
190 * Arg - Argument Op to append
191 *
192 * RETURN: None.
193 *
194 * DESCRIPTION: Append an argument to an op's argument list (a NULL arg is OK)
195 *
196 ******************************************************************************/
197
198void
199AcpiPsAppendArg (
200 ACPI_PARSE_OBJECT *Op,
201 ACPI_PARSE_OBJECT *Arg)
202{
203 ACPI_PARSE_OBJECT *PrevArg;
204 const ACPI_OPCODE_INFO *OpInfo;
205
206
207 ACPI_FUNCTION_ENTRY ();
208
209
210 if (!Op)
211 {
212 return;
213 }
214
215 /* Get the info structure for this opcode */
216
217 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
218 if (OpInfo->Class == AML_CLASS_UNKNOWN)
219 {
220 /* Invalid opcode */
221
222 ACPI_REPORT_ERROR (("PsAppendArg: Invalid AML Opcode: 0x%2.2X\n",
223 Op->Common.AmlOpcode));
224 return;
225 }
226
227 /* Check if this opcode requires argument sub-objects */
228
229 if (!(OpInfo->Flags & AML_HAS_ARGS))
230 {
231 /* Has no linked argument objects */
232
233 return;
234 }
235
236
237 /* Append the argument to the linked argument list */
238
239 if (Op->Common.Value.Arg)
240 {
241 /* Append to existing argument list */
242
243 PrevArg = Op->Common.Value.Arg;
244 while (PrevArg->Common.Next)
245 {
246 PrevArg = PrevArg->Common.Next;
247 }
248 PrevArg->Common.Next = Arg;
249 }
250
251 else
252 {
253 /* No argument list, this will be the first argument */
254
255 Op->Common.Value.Arg = Arg;
256 }
257
258
259 /* Set the parent in this arg and any args linked after it */
260
261 while (Arg)
262 {
263 Arg->Common.Parent = Op;
264 Arg = Arg->Common.Next;
265 }
266}
267
268
269/*******************************************************************************
270 *
271 * FUNCTION: AcpiPsGetChild
272 *
273 * PARAMETERS: Op - Get the child of this Op
274 *
275 * RETURN: Child Op, Null if none is found.
276 *
277 * DESCRIPTION: Get op's children or NULL if none
278 *
279 ******************************************************************************/
280
281ACPI_PARSE_OBJECT *
282AcpiPsGetChild (
283 ACPI_PARSE_OBJECT *Op)
284{
285 ACPI_PARSE_OBJECT *Child = NULL;
286
287
288 ACPI_FUNCTION_ENTRY ();
289
290
291 switch (Op->Common.AmlOpcode)
292 {
293 case AML_SCOPE_OP:
294 case AML_ELSE_OP:
295 case AML_DEVICE_OP:
296 case AML_THERMAL_ZONE_OP:
297 case AML_INT_METHODCALL_OP:
298
299 Child = AcpiPsGetArg (Op, 0);
300 break;
301
302
303 case AML_BUFFER_OP:
304 case AML_PACKAGE_OP:
305 case AML_METHOD_OP:
306 case AML_IF_OP:
307 case AML_WHILE_OP:
308 case AML_FIELD_OP:
309
310 Child = AcpiPsGetArg (Op, 1);
311 break;
312
313
314 case AML_POWER_RES_OP:
315 case AML_INDEX_FIELD_OP:
316
317 Child = AcpiPsGetArg (Op, 2);
318 break;
319
320
321 case AML_PROCESSOR_OP:
322 case AML_BANK_FIELD_OP:
323
324 Child = AcpiPsGetArg (Op, 3);
325 break;
326
327
328 default:
329 /* All others have no children */
330 break;
331 }
332
333 return (Child);
334}
335
336
337/*******************************************************************************
338 *
339 * FUNCTION: AcpiPsGetDepthNext
340 *
341 * PARAMETERS: Origin - Root of subtree to search
342 * Op - Last (previous) Op that was found
343 *
344 * RETURN: Next Op found in the search.
345 *
346 * DESCRIPTION: Get next op in tree (walking the tree in depth-first order)
347 * Return NULL when reaching "origin" or when walking up from root
348 *
349 ******************************************************************************/
350
351ACPI_PARSE_OBJECT *
352AcpiPsGetDepthNext (
353 ACPI_PARSE_OBJECT *Origin,
354 ACPI_PARSE_OBJECT *Op)
355{
356 ACPI_PARSE_OBJECT *Next = NULL;
357 ACPI_PARSE_OBJECT *Parent;
358 ACPI_PARSE_OBJECT *Arg;
359
360
361 ACPI_FUNCTION_ENTRY ();
362
363
364 if (!Op)
365 {
366 return (NULL);
367 }
368
369 /* look for an argument or child */
370
371 Next = AcpiPsGetArg (Op, 0);
372 if (Next)
373 {
374 return (Next);
375 }
376
377 /* look for a sibling */
378
379 Next = Op->Common.Next;
380 if (Next)
381 {
382 return (Next);
383 }
384
385 /* look for a sibling of parent */
386
387 Parent = Op->Common.Parent;
388
389 while (Parent)
390 {
391 Arg = AcpiPsGetArg (Parent, 0);
392 while (Arg && (Arg != Origin) && (Arg != Op))
393 {
394 Arg = Arg->Common.Next;
395 }
396
397 if (Arg == Origin)
398 {
399 /* reached parent of origin, end search */
400
401 return (NULL);
402 }
403
404 if (Parent->Common.Next)
405 {
406 /* found sibling of parent */
407
408 return (Parent->Common.Next);
409 }
410
411 Op = Parent;
412 Parent = Parent->Common.Parent;
413 }
414
415 return (Next);
416}
417
418
| 13 * All rights reserved.
14 *
15 * 2. License
16 *
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
20 * property rights.
21 *
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
28 *
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
37 *
38 * The above copyright and patent license is granted only if the following
39 * conditions are met:
40 *
41 * 3. Conditions
42 *
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
54 *
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
65 * make.
66 *
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3.4. Intel retains all right, title, and interest in and to the Original
74 * Intel Code.
75 *
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
80 *
81 * 4. Disclaimer and Export Compliance
82 *
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
89 * PARTICULAR PURPOSE.
90 *
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
98 * LIMITED REMEDY.
99 *
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
114 *
115 *****************************************************************************/
116
117
118#define __PSTREE_C__
119
120#include "acpi.h"
121#include "acparser.h"
122#include "amlcode.h"
123
124#define _COMPONENT ACPI_PARSER
125 ACPI_MODULE_NAME ("pstree")
126
127
128/*******************************************************************************
129 *
130 * FUNCTION: AcpiPsGetArg
131 *
132 * PARAMETERS: Op - Get an argument for this op
133 * Argn - Nth argument to get
134 *
135 * RETURN: The argument (as an Op object). NULL if argument does not exist
136 *
137 * DESCRIPTION: Get the specified op's argument.
138 *
139 ******************************************************************************/
140
141ACPI_PARSE_OBJECT *
142AcpiPsGetArg (
143 ACPI_PARSE_OBJECT *Op,
144 UINT32 Argn)
145{
146 ACPI_PARSE_OBJECT *Arg = NULL;
147 const ACPI_OPCODE_INFO *OpInfo;
148
149
150 ACPI_FUNCTION_ENTRY ();
151
152
153 /* Get the info structure for this opcode */
154
155 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
156 if (OpInfo->Class == AML_CLASS_UNKNOWN)
157 {
158 /* Invalid opcode or ASCII character */
159
160 return (NULL);
161 }
162
163 /* Check if this opcode requires argument sub-objects */
164
165 if (!(OpInfo->Flags & AML_HAS_ARGS))
166 {
167 /* Has no linked argument objects */
168
169 return (NULL);
170 }
171
172 /* Get the requested argument object */
173
174 Arg = Op->Common.Value.Arg;
175 while (Arg && Argn)
176 {
177 Argn--;
178 Arg = Arg->Common.Next;
179 }
180
181 return (Arg);
182}
183
184
185/*******************************************************************************
186 *
187 * FUNCTION: AcpiPsAppendArg
188 *
189 * PARAMETERS: Op - Append an argument to this Op.
190 * Arg - Argument Op to append
191 *
192 * RETURN: None.
193 *
194 * DESCRIPTION: Append an argument to an op's argument list (a NULL arg is OK)
195 *
196 ******************************************************************************/
197
198void
199AcpiPsAppendArg (
200 ACPI_PARSE_OBJECT *Op,
201 ACPI_PARSE_OBJECT *Arg)
202{
203 ACPI_PARSE_OBJECT *PrevArg;
204 const ACPI_OPCODE_INFO *OpInfo;
205
206
207 ACPI_FUNCTION_ENTRY ();
208
209
210 if (!Op)
211 {
212 return;
213 }
214
215 /* Get the info structure for this opcode */
216
217 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
218 if (OpInfo->Class == AML_CLASS_UNKNOWN)
219 {
220 /* Invalid opcode */
221
222 ACPI_REPORT_ERROR (("PsAppendArg: Invalid AML Opcode: 0x%2.2X\n",
223 Op->Common.AmlOpcode));
224 return;
225 }
226
227 /* Check if this opcode requires argument sub-objects */
228
229 if (!(OpInfo->Flags & AML_HAS_ARGS))
230 {
231 /* Has no linked argument objects */
232
233 return;
234 }
235
236
237 /* Append the argument to the linked argument list */
238
239 if (Op->Common.Value.Arg)
240 {
241 /* Append to existing argument list */
242
243 PrevArg = Op->Common.Value.Arg;
244 while (PrevArg->Common.Next)
245 {
246 PrevArg = PrevArg->Common.Next;
247 }
248 PrevArg->Common.Next = Arg;
249 }
250
251 else
252 {
253 /* No argument list, this will be the first argument */
254
255 Op->Common.Value.Arg = Arg;
256 }
257
258
259 /* Set the parent in this arg and any args linked after it */
260
261 while (Arg)
262 {
263 Arg->Common.Parent = Op;
264 Arg = Arg->Common.Next;
265 }
266}
267
268
269/*******************************************************************************
270 *
271 * FUNCTION: AcpiPsGetChild
272 *
273 * PARAMETERS: Op - Get the child of this Op
274 *
275 * RETURN: Child Op, Null if none is found.
276 *
277 * DESCRIPTION: Get op's children or NULL if none
278 *
279 ******************************************************************************/
280
281ACPI_PARSE_OBJECT *
282AcpiPsGetChild (
283 ACPI_PARSE_OBJECT *Op)
284{
285 ACPI_PARSE_OBJECT *Child = NULL;
286
287
288 ACPI_FUNCTION_ENTRY ();
289
290
291 switch (Op->Common.AmlOpcode)
292 {
293 case AML_SCOPE_OP:
294 case AML_ELSE_OP:
295 case AML_DEVICE_OP:
296 case AML_THERMAL_ZONE_OP:
297 case AML_INT_METHODCALL_OP:
298
299 Child = AcpiPsGetArg (Op, 0);
300 break;
301
302
303 case AML_BUFFER_OP:
304 case AML_PACKAGE_OP:
305 case AML_METHOD_OP:
306 case AML_IF_OP:
307 case AML_WHILE_OP:
308 case AML_FIELD_OP:
309
310 Child = AcpiPsGetArg (Op, 1);
311 break;
312
313
314 case AML_POWER_RES_OP:
315 case AML_INDEX_FIELD_OP:
316
317 Child = AcpiPsGetArg (Op, 2);
318 break;
319
320
321 case AML_PROCESSOR_OP:
322 case AML_BANK_FIELD_OP:
323
324 Child = AcpiPsGetArg (Op, 3);
325 break;
326
327
328 default:
329 /* All others have no children */
330 break;
331 }
332
333 return (Child);
334}
335
336
337/*******************************************************************************
338 *
339 * FUNCTION: AcpiPsGetDepthNext
340 *
341 * PARAMETERS: Origin - Root of subtree to search
342 * Op - Last (previous) Op that was found
343 *
344 * RETURN: Next Op found in the search.
345 *
346 * DESCRIPTION: Get next op in tree (walking the tree in depth-first order)
347 * Return NULL when reaching "origin" or when walking up from root
348 *
349 ******************************************************************************/
350
351ACPI_PARSE_OBJECT *
352AcpiPsGetDepthNext (
353 ACPI_PARSE_OBJECT *Origin,
354 ACPI_PARSE_OBJECT *Op)
355{
356 ACPI_PARSE_OBJECT *Next = NULL;
357 ACPI_PARSE_OBJECT *Parent;
358 ACPI_PARSE_OBJECT *Arg;
359
360
361 ACPI_FUNCTION_ENTRY ();
362
363
364 if (!Op)
365 {
366 return (NULL);
367 }
368
369 /* look for an argument or child */
370
371 Next = AcpiPsGetArg (Op, 0);
372 if (Next)
373 {
374 return (Next);
375 }
376
377 /* look for a sibling */
378
379 Next = Op->Common.Next;
380 if (Next)
381 {
382 return (Next);
383 }
384
385 /* look for a sibling of parent */
386
387 Parent = Op->Common.Parent;
388
389 while (Parent)
390 {
391 Arg = AcpiPsGetArg (Parent, 0);
392 while (Arg && (Arg != Origin) && (Arg != Op))
393 {
394 Arg = Arg->Common.Next;
395 }
396
397 if (Arg == Origin)
398 {
399 /* reached parent of origin, end search */
400
401 return (NULL);
402 }
403
404 if (Parent->Common.Next)
405 {
406 /* found sibling of parent */
407
408 return (Parent->Common.Next);
409 }
410
411 Op = Parent;
412 Parent = Parent->Common.Parent;
413 }
414
415 return (Next);
416}
417
418
|