1 /******************************************************************************
2 *
3 * Module Name: exconvrt - Object conversion routines
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2023, 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 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include "acpi.h"
153 #include "accommon.h"
154 #include "acinterp.h"
155 #include "amlcode.h"
156
157
158 #define _COMPONENT ACPI_EXECUTER
159 ACPI_MODULE_NAME ("exconvrt")
160
161 /* Local prototypes */
162
163 static UINT32
164 AcpiExConvertToAscii (
165 UINT64 Integer,
166 UINT16 Base,
167 UINT8 *String,
168 UINT8 MaxLength);
169
170
171 /*******************************************************************************
172 *
173 * FUNCTION: AcpiExConvertToInteger
174 *
175 * PARAMETERS: ObjDesc - Object to be converted. Must be an
176 * Integer, Buffer, or String
177 * ResultDesc - Where the new Integer object is returned
178 * ImplicitConversion - Used for string conversion
179 *
180 * RETURN: Status
181 *
182 * DESCRIPTION: Convert an ACPI Object to an integer.
183 *
184 ******************************************************************************/
185
186 ACPI_STATUS
AcpiExConvertToInteger(ACPI_OPERAND_OBJECT * ObjDesc,ACPI_OPERAND_OBJECT ** ResultDesc,UINT32 ImplicitConversion)187 AcpiExConvertToInteger (
188 ACPI_OPERAND_OBJECT *ObjDesc,
189 ACPI_OPERAND_OBJECT **ResultDesc,
190 UINT32 ImplicitConversion)
191 {
192 ACPI_OPERAND_OBJECT *ReturnDesc;
193 UINT8 *Pointer;
194 UINT64 Result;
195 UINT32 i;
196 UINT32 Count;
197
198
199 ACPI_FUNCTION_TRACE_PTR (ExConvertToInteger, ObjDesc);
200
201
202 switch (ObjDesc->Common.Type)
203 {
204 case ACPI_TYPE_INTEGER:
205
206 /* No conversion necessary */
207
208 *ResultDesc = ObjDesc;
209 return_ACPI_STATUS (AE_OK);
210
211 case ACPI_TYPE_BUFFER:
212 case ACPI_TYPE_STRING:
213
214 /* Note: Takes advantage of common buffer/string fields */
215
216 Pointer = ObjDesc->Buffer.Pointer;
217 Count = ObjDesc->Buffer.Length;
218 break;
219
220 default:
221
222 return_ACPI_STATUS (AE_TYPE);
223 }
224
225 /*
226 * Convert the buffer/string to an integer. Note that both buffers and
227 * strings are treated as raw data - we don't convert ascii to hex for
228 * strings.
229 *
230 * There are two terminating conditions for the loop:
231 * 1) The size of an integer has been reached, or
232 * 2) The end of the buffer or string has been reached
233 */
234 Result = 0;
235
236 /* String conversion is different than Buffer conversion */
237
238 switch (ObjDesc->Common.Type)
239 {
240 case ACPI_TYPE_STRING:
241 /*
242 * Convert string to an integer - for most cases, the string must be
243 * hexadecimal as per the ACPI specification. The only exception (as
244 * of ACPI 3.0) is that the ToInteger() operator allows both decimal
245 * and hexadecimal strings (hex prefixed with "0x").
246 *
247 * Explicit conversion is used only by ToInteger.
248 * All other string-to-integer conversions are implicit conversions.
249 */
250 if (ImplicitConversion)
251 {
252 Result = AcpiUtImplicitStrtoul64 (ACPI_CAST_PTR (char, Pointer));
253 }
254 else
255 {
256 Result = AcpiUtExplicitStrtoul64 (ACPI_CAST_PTR (char, Pointer));
257 }
258 break;
259
260 case ACPI_TYPE_BUFFER:
261
262 /* Check for zero-length buffer */
263
264 if (!Count)
265 {
266 return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
267 }
268
269 /* Transfer no more than an integer's worth of data */
270
271 if (Count > AcpiGbl_IntegerByteWidth)
272 {
273 Count = AcpiGbl_IntegerByteWidth;
274 }
275
276 /*
277 * Convert buffer to an integer - we simply grab enough raw data
278 * from the buffer to fill an integer
279 */
280 for (i = 0; i < Count; i++)
281 {
282 /*
283 * Get next byte and shift it into the Result.
284 * Little endian is used, meaning that the first byte of the buffer
285 * is the LSB of the integer
286 */
287 Result |= (((UINT64) Pointer[i]) << (i * 8));
288 }
289 break;
290
291 default:
292
293 /* No other types can get here */
294
295 break;
296 }
297
298 /* Create a new integer */
299
300 ReturnDesc = AcpiUtCreateIntegerObject (Result);
301 if (!ReturnDesc)
302 {
303 return_ACPI_STATUS (AE_NO_MEMORY);
304 }
305
306 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
307 ACPI_FORMAT_UINT64 (Result)));
308
309 /* Save the Result */
310
311 (void) AcpiExTruncateFor32bitTable (ReturnDesc);
312 *ResultDesc = ReturnDesc;
313 return_ACPI_STATUS (AE_OK);
314 }
315
316
317 /*******************************************************************************
318 *
319 * FUNCTION: AcpiExConvertToBuffer
320 *
321 * PARAMETERS: ObjDesc - Object to be converted. Must be an
322 * Integer, Buffer, or String
323 * ResultDesc - Where the new buffer object is returned
324 *
325 * RETURN: Status
326 *
327 * DESCRIPTION: Convert an ACPI Object to a Buffer
328 *
329 ******************************************************************************/
330
331 ACPI_STATUS
AcpiExConvertToBuffer(ACPI_OPERAND_OBJECT * ObjDesc,ACPI_OPERAND_OBJECT ** ResultDesc)332 AcpiExConvertToBuffer (
333 ACPI_OPERAND_OBJECT *ObjDesc,
334 ACPI_OPERAND_OBJECT **ResultDesc)
335 {
336 ACPI_OPERAND_OBJECT *ReturnDesc;
337 UINT8 *NewBuf;
338
339
340 ACPI_FUNCTION_TRACE_PTR (ExConvertToBuffer, ObjDesc);
341
342
343 switch (ObjDesc->Common.Type)
344 {
345 case ACPI_TYPE_BUFFER:
346
347 /* No conversion necessary */
348
349 *ResultDesc = ObjDesc;
350 return_ACPI_STATUS (AE_OK);
351
352
353 case ACPI_TYPE_INTEGER:
354 /*
355 * Create a new Buffer object.
356 * Need enough space for one integer
357 */
358 ReturnDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth);
359 if (!ReturnDesc)
360 {
361 return_ACPI_STATUS (AE_NO_MEMORY);
362 }
363
364 /* Copy the integer to the buffer, LSB first */
365
366 NewBuf = ReturnDesc->Buffer.Pointer;
367 memcpy (NewBuf, &ObjDesc->Integer.Value, AcpiGbl_IntegerByteWidth);
368 break;
369
370 case ACPI_TYPE_STRING:
371 /*
372 * Create a new Buffer object
373 * Size will be the string length
374 *
375 * NOTE: Add one to the string length to include the null terminator.
376 * The ACPI spec is unclear on this subject, but there is existing
377 * ASL/AML code that depends on the null being transferred to the new
378 * buffer.
379 */
380 ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE)
381 ObjDesc->String.Length + 1);
382 if (!ReturnDesc)
383 {
384 return_ACPI_STATUS (AE_NO_MEMORY);
385 }
386
387 /* Copy the string to the buffer */
388
389 NewBuf = ReturnDesc->Buffer.Pointer;
390 strncpy ((char *) NewBuf, (char *) ObjDesc->String.Pointer,
391 ObjDesc->String.Length);
392 break;
393
394 default:
395
396 return_ACPI_STATUS (AE_TYPE);
397 }
398
399 /* Mark buffer initialized */
400
401 ReturnDesc->Common.Flags |= AOPOBJ_DATA_VALID;
402 *ResultDesc = ReturnDesc;
403 return_ACPI_STATUS (AE_OK);
404 }
405
406
407 /*******************************************************************************
408 *
409 * FUNCTION: AcpiExConvertToAscii
410 *
411 * PARAMETERS: Integer - Value to be converted
412 * Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX
413 * String - Where the string is returned
414 * DataWidth - Size of data item to be converted, in bytes
415 *
416 * RETURN: Actual string length
417 *
418 * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
419 *
420 ******************************************************************************/
421
422 static UINT32
AcpiExConvertToAscii(UINT64 Integer,UINT16 Base,UINT8 * String,UINT8 DataWidth)423 AcpiExConvertToAscii (
424 UINT64 Integer,
425 UINT16 Base,
426 UINT8 *String,
427 UINT8 DataWidth)
428 {
429 UINT64 Digit;
430 UINT32 i;
431 UINT32 j;
432 UINT32 k = 0;
433 UINT32 HexLength;
434 UINT32 DecimalLength;
435 UINT32 Remainder;
436 BOOLEAN SupressZeros;
437
438
439 ACPI_FUNCTION_ENTRY ();
440
441
442 switch (Base)
443 {
444 case 10:
445
446 /* Setup max length for the decimal number */
447
448 switch (DataWidth)
449 {
450 case 1:
451
452 DecimalLength = ACPI_MAX8_DECIMAL_DIGITS;
453 break;
454
455 case 4:
456
457 DecimalLength = ACPI_MAX32_DECIMAL_DIGITS;
458 break;
459
460 case 8:
461 default:
462
463 DecimalLength = ACPI_MAX64_DECIMAL_DIGITS;
464 break;
465 }
466
467 SupressZeros = TRUE; /* No leading zeros */
468 Remainder = 0;
469
470 for (i = DecimalLength; i > 0; i--)
471 {
472 /* Divide by nth factor of 10 */
473
474 Digit = Integer;
475 for (j = 0; j < i; j++)
476 {
477 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Remainder);
478 }
479
480 /* Handle leading zeros */
481
482 if (Remainder != 0)
483 {
484 SupressZeros = FALSE;
485 }
486
487 if (!SupressZeros)
488 {
489 String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder);
490 k++;
491 }
492 }
493 break;
494
495 case 16:
496
497 /* HexLength: 2 ascii hex chars per data byte */
498
499 HexLength = (DataWidth * 2);
500 for (i = 0, j = (HexLength-1); i < HexLength; i++, j--)
501 {
502 /* Get one hex digit, most significant digits first */
503
504 String[k] = (UINT8)
505 AcpiUtHexToAsciiChar (Integer, ACPI_MUL_4 (j));
506 k++;
507 }
508 break;
509
510 default:
511 return (0);
512 }
513
514 /*
515 * Since leading zeros are suppressed, we must check for the case where
516 * the integer equals 0
517 *
518 * Finally, null terminate the string and return the length
519 */
520 if (!k)
521 {
522 String [0] = ACPI_ASCII_ZERO;
523 k = 1;
524 }
525
526 String [k] = 0;
527 return ((UINT32) k);
528 }
529
530
531 /*******************************************************************************
532 *
533 * FUNCTION: AcpiExConvertToString
534 *
535 * PARAMETERS: ObjDesc - Object to be converted. Must be an
536 * Integer, Buffer, or String
537 * ResultDesc - Where the string object is returned
538 * Type - String flags (base and conversion type)
539 *
540 * RETURN: Status
541 *
542 * DESCRIPTION: Convert an ACPI Object to a string. Supports both implicit
543 * and explicit conversions and related rules.
544 *
545 ******************************************************************************/
546
547 ACPI_STATUS
AcpiExConvertToString(ACPI_OPERAND_OBJECT * ObjDesc,ACPI_OPERAND_OBJECT ** ResultDesc,UINT32 Type)548 AcpiExConvertToString (
549 ACPI_OPERAND_OBJECT *ObjDesc,
550 ACPI_OPERAND_OBJECT **ResultDesc,
551 UINT32 Type)
552 {
553 ACPI_OPERAND_OBJECT *ReturnDesc;
554 UINT8 *NewBuf;
555 UINT32 i;
556 UINT32 StringLength = 0;
557 UINT16 Base = 16;
558 UINT8 Separator = ',';
559
560
561 ACPI_FUNCTION_TRACE_PTR (ExConvertToString, ObjDesc);
562
563
564 switch (ObjDesc->Common.Type)
565 {
566 case ACPI_TYPE_STRING:
567
568 /* No conversion necessary */
569
570 *ResultDesc = ObjDesc;
571 return_ACPI_STATUS (AE_OK);
572
573 case ACPI_TYPE_INTEGER:
574
575 switch (Type)
576 {
577 case ACPI_EXPLICIT_CONVERT_DECIMAL:
578 /*
579 * From ToDecimalString, integer source.
580 *
581 * Make room for the maximum decimal number size
582 */
583 StringLength = ACPI_MAX_DECIMAL_DIGITS;
584 Base = 10;
585 break;
586
587 default:
588
589 /* Two hex string characters for each integer byte */
590
591 StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth);
592 break;
593 }
594
595 /*
596 * Create a new String
597 * Need enough space for one ASCII integer (plus null terminator)
598 */
599 ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
600 if (!ReturnDesc)
601 {
602 return_ACPI_STATUS (AE_NO_MEMORY);
603 }
604
605 NewBuf = ReturnDesc->Buffer.Pointer;
606
607 /* Convert integer to string */
608
609 StringLength = AcpiExConvertToAscii (
610 ObjDesc->Integer.Value, Base, NewBuf, AcpiGbl_IntegerByteWidth);
611
612 /* Null terminate at the correct place */
613
614 ReturnDesc->String.Length = StringLength;
615 NewBuf [StringLength] = 0;
616 break;
617
618 case ACPI_TYPE_BUFFER:
619
620 /* Setup string length, base, and separator */
621
622 switch (Type)
623 {
624 case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by ToDecimalString */
625 /*
626 * Explicit conversion from the ToDecimalString ASL operator.
627 *
628 * From ACPI: "If the input is a buffer, it is converted to a
629 * a string of decimal values separated by commas."
630 */
631 Base = 10;
632
633 /*
634 * Calculate the final string length. Individual string values
635 * are variable length (include separator for each)
636 */
637 for (i = 0; i < ObjDesc->Buffer.Length; i++)
638 {
639 if (ObjDesc->Buffer.Pointer[i] >= 100)
640 {
641 StringLength += 4;
642 }
643 else if (ObjDesc->Buffer.Pointer[i] >= 10)
644 {
645 StringLength += 3;
646 }
647 else
648 {
649 StringLength += 2;
650 }
651 }
652 break;
653
654 case ACPI_IMPLICIT_CONVERT_HEX:
655 /*
656 * Implicit buffer-to-string conversion
657 *
658 * From the ACPI spec:
659 * "The entire contents of the buffer are converted to a string of
660 * two-character hexadecimal numbers, each separated by a space."
661 *
662 * Each hex number is prefixed with 0x (11/2018)
663 */
664 Separator = ' ';
665 StringLength = (ObjDesc->Buffer.Length * 5);
666 break;
667
668 case ACPI_EXPLICIT_CONVERT_HEX:
669 /*
670 * Explicit conversion from the ToHexString ASL operator.
671 *
672 * From ACPI: "If Data is a buffer, it is converted to a string of
673 * hexadecimal values separated by commas."
674 *
675 * Each hex number is prefixed with 0x (11/2018)
676 */
677 Separator = ',';
678 StringLength = (ObjDesc->Buffer.Length * 5);
679 break;
680
681 default:
682 return_ACPI_STATUS (AE_BAD_PARAMETER);
683 }
684
685 /*
686 * Create a new string object and string buffer
687 * (-1 because of extra separator included in StringLength from above)
688 * Allow creation of zero-length strings from zero-length buffers.
689 */
690 if (StringLength)
691 {
692 StringLength--;
693 }
694
695 ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
696 if (!ReturnDesc)
697 {
698 return_ACPI_STATUS (AE_NO_MEMORY);
699 }
700
701 NewBuf = ReturnDesc->Buffer.Pointer;
702
703 /*
704 * Convert buffer bytes to hex or decimal values
705 * (separated by commas or spaces)
706 */
707 for (i = 0; i < ObjDesc->Buffer.Length; i++)
708 {
709 if (Base == 16)
710 {
711 /* Emit 0x prefix for explicit/implicit hex conversion */
712
713 *NewBuf++ = '0';
714 *NewBuf++ = 'x';
715 }
716
717 NewBuf += AcpiExConvertToAscii (
718 (UINT64) ObjDesc->Buffer.Pointer[i], Base, NewBuf, 1);
719
720 /* Each digit is separated by either a comma or space */
721
722 *NewBuf++ = Separator;
723 }
724
725 /*
726 * Null terminate the string
727 * (overwrites final comma/space from above)
728 */
729 if (ObjDesc->Buffer.Length)
730 {
731 NewBuf--;
732 }
733 *NewBuf = 0;
734 break;
735
736 default:
737
738 return_ACPI_STATUS (AE_TYPE);
739 }
740
741 *ResultDesc = ReturnDesc;
742 return_ACPI_STATUS (AE_OK);
743 }
744
745
746 /*******************************************************************************
747 *
748 * FUNCTION: AcpiExConvertToTargetType
749 *
750 * PARAMETERS: DestinationType - Current type of the destination
751 * SourceDesc - Source object to be converted.
752 * ResultDesc - Where the converted object is returned
753 * WalkState - Current method state
754 *
755 * RETURN: Status
756 *
757 * DESCRIPTION: Implements "implicit conversion" rules for storing an object.
758 *
759 ******************************************************************************/
760
761 ACPI_STATUS
AcpiExConvertToTargetType(ACPI_OBJECT_TYPE DestinationType,ACPI_OPERAND_OBJECT * SourceDesc,ACPI_OPERAND_OBJECT ** ResultDesc,ACPI_WALK_STATE * WalkState)762 AcpiExConvertToTargetType (
763 ACPI_OBJECT_TYPE DestinationType,
764 ACPI_OPERAND_OBJECT *SourceDesc,
765 ACPI_OPERAND_OBJECT **ResultDesc,
766 ACPI_WALK_STATE *WalkState)
767 {
768 ACPI_STATUS Status = AE_OK;
769
770
771 ACPI_FUNCTION_TRACE (ExConvertToTargetType);
772
773
774 /* Default behavior */
775
776 *ResultDesc = SourceDesc;
777
778 /*
779 * If required by the target,
780 * perform implicit conversion on the source before we store it.
781 */
782 switch (GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs))
783 {
784 case ARGI_SIMPLE_TARGET:
785 case ARGI_FIXED_TARGET:
786 case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */
787
788 switch (DestinationType)
789 {
790 case ACPI_TYPE_LOCAL_REGION_FIELD:
791 /*
792 * Named field can always handle conversions
793 */
794 break;
795
796 default:
797
798 /* No conversion allowed for these types */
799
800 if (DestinationType != SourceDesc->Common.Type)
801 {
802 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
803 "Explicit operator, will store (%s) over existing type (%s)\n",
804 AcpiUtGetObjectTypeName (SourceDesc),
805 AcpiUtGetTypeName (DestinationType)));
806 Status = AE_TYPE;
807 }
808 }
809 break;
810
811 case ARGI_TARGETREF:
812 case ARGI_STORE_TARGET:
813
814 switch (DestinationType)
815 {
816 case ACPI_TYPE_INTEGER:
817 case ACPI_TYPE_BUFFER_FIELD:
818 case ACPI_TYPE_LOCAL_BANK_FIELD:
819 case ACPI_TYPE_LOCAL_INDEX_FIELD:
820 /*
821 * These types require an Integer operand. We can convert
822 * a Buffer or a String to an Integer if necessary.
823 */
824 Status = AcpiExConvertToInteger (SourceDesc, ResultDesc,
825 ACPI_IMPLICIT_CONVERSION);
826 break;
827
828 case ACPI_TYPE_STRING:
829 /*
830 * The operand must be a String. We can convert an
831 * Integer or Buffer if necessary
832 */
833 Status = AcpiExConvertToString (SourceDesc, ResultDesc,
834 ACPI_IMPLICIT_CONVERT_HEX);
835 break;
836
837 case ACPI_TYPE_BUFFER:
838 /*
839 * The operand must be a Buffer. We can convert an
840 * Integer or String if necessary
841 */
842 Status = AcpiExConvertToBuffer (SourceDesc, ResultDesc);
843 break;
844
845 default:
846
847 ACPI_ERROR ((AE_INFO,
848 "Bad destination type during conversion: 0x%X",
849 DestinationType));
850 Status = AE_AML_INTERNAL;
851 break;
852 }
853 break;
854
855 case ARGI_REFERENCE:
856 /*
857 * CreateXxxxField cases - we are storing the field object into the name
858 */
859 break;
860
861 default:
862
863 ACPI_ERROR ((AE_INFO,
864 "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s",
865 GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs),
866 WalkState->Opcode, AcpiUtGetTypeName (DestinationType)));
867 Status = AE_AML_INTERNAL;
868 }
869
870 /*
871 * Source-to-Target conversion semantics:
872 *
873 * If conversion to the target type cannot be performed, then simply
874 * overwrite the target with the new object and type.
875 */
876 if (Status == AE_TYPE)
877 {
878 Status = AE_OK;
879 }
880
881 return_ACPI_STATUS (Status);
882 }
883
