2 /******************************************************************************
4 * Module Name: exstorob - AML Interpreter object store support, store to object
7 *****************************************************************************/
9 /******************************************************************************
13 * Some or all of this work - Copyright (c) 1999 - 2006, Intel Corp.
14 * All rights reserved.
18 * 2.1. This is your license from Intel Corp. under its intellectual property
19 * rights. You may have additional license terms from the party that provided
20 * you this software, covering your right to use that party's intellectual
23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
24 * copy of the source code appearing in this file ("Covered Code") an
25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
26 * base code distributed originally by Intel ("Original Intel Code") to copy,
27 * make derivatives, distribute, use and display any portion of the Covered
28 * Code in any form, with the right to sublicense such rights; and
30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
31 * license (with the right to sublicense), under only those claims of Intel
32 * patents that are infringed by the Original Intel Code, to make, use, sell,
33 * offer to sell, and import the Covered Code and derivative works thereof
34 * solely to the minimum extent necessary to exercise the above copyright
35 * license, and in no event shall the patent license extend to any additions
36 * to or modifications of the Original Intel Code. No other license or right
37 * is granted directly or by implication, estoppel or otherwise;
39 * The above copyright and patent license is granted only if the following
44 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
45 * Redistribution of source code of any substantial portion of the Covered
46 * Code or modification with rights to further distribute source must include
47 * the above Copyright Notice, the above License, this list of Conditions,
48 * and the following Disclaimer and Export Compliance provision. In addition,
49 * Licensee must cause all Covered Code to which Licensee contributes to
50 * contain a file documenting the changes Licensee made to create that Covered
51 * Code and the date of any change. Licensee must include in that file the
52 * documentation of any changes made by any predecessor Licensee. Licensee
53 * must include a prominent statement that the modification is derived,
54 * directly or indirectly, from Original Intel Code.
56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
57 * Redistribution of source code of any substantial portion of the Covered
58 * Code or modification without rights to further distribute source must
59 * include the following Disclaimer and Export Compliance provision in the
60 * documentation and/or other materials provided with distribution. In
61 * addition, Licensee may not authorize further sublicense of source of any
62 * portion of the Covered Code, and must include terms to the effect that the
63 * license from Licensee to its licensee is limited to the intellectual
64 * property embodied in the software Licensee provides to its licensee, and
65 * not to intellectual property embodied in modifications its licensee may
68 * 3.3. Redistribution of Executable. Redistribution in executable form of any
69 * substantial portion of the Covered Code or modification must reproduce the
70 * above Copyright Notice, and the following Disclaimer and Export Compliance
71 * provision in the documentation and/or other materials provided with the
74 * 3.4. Intel retains all right, title, and interest in and to the Original
77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
78 * Intel shall be used in advertising or otherwise to promote the sale, use or
79 * other dealings in products derived from or relating to the Covered Code
80 * without prior written authorization from Intel.
82 * 4. Disclaimer and Export Compliance
84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
101 * 4.3. Licensee shall not export, either directly or indirectly, any of this
102 * software or system incorporating such software without first obtaining any
103 * required license or other approval from the U. S. Department of Commerce or
104 * any other agency or department of the United States Government. In the
105 * event Licensee exports any such software from the United States or
106 * re-exports any such software from a foreign destination, Licensee shall
107 * ensure that the distribution and export/re-export of the software is in
108 * compliance with all laws, regulations, orders, or other restrictions of the
109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
110 * any of its subsidiaries will export/re-export any technical data, process,
111 * software, or service, directly or indirectly, to any country for which the
112 * United States government or any agency thereof requires an export license,
113 * other governmental approval, or letter of assurance, without first obtaining
114 * such license, approval or letter.
116 *****************************************************************************/
118 #define __EXSTOROB_C__
121 #include "acinterp.h"
124 #define _COMPONENT ACPI_EXECUTER
125 ACPI_MODULE_NAME ("exstorob")
128 /*******************************************************************************
130 * FUNCTION: AcpiExStoreBufferToBuffer
132 * PARAMETERS: SourceDesc - Source object to copy
133 * TargetDesc - Destination object of the copy
137 * DESCRIPTION: Copy a buffer object to another buffer object.
139 ******************************************************************************/
142 AcpiExStoreBufferToBuffer (
143 ACPI_OPERAND_OBJECT
*SourceDesc
,
144 ACPI_OPERAND_OBJECT
*TargetDesc
)
150 ACPI_FUNCTION_TRACE_PTR (ExStoreBufferToBuffer
, SourceDesc
);
153 /* We know that SourceDesc is a buffer by now */
155 Buffer
= ACPI_CAST_PTR (UINT8
, SourceDesc
->Buffer
.Pointer
);
156 Length
= SourceDesc
->Buffer
.Length
;
159 * If target is a buffer of length zero or is a static buffer,
160 * allocate a new buffer of the proper length
162 if ((TargetDesc
->Buffer
.Length
== 0) ||
163 (TargetDesc
->Common
.Flags
& AOPOBJ_STATIC_POINTER
))
165 TargetDesc
->Buffer
.Pointer
= ACPI_ALLOCATE (Length
);
166 if (!TargetDesc
->Buffer
.Pointer
)
168 return_ACPI_STATUS (AE_NO_MEMORY
);
171 TargetDesc
->Buffer
.Length
= Length
;
174 /* Copy source buffer to target buffer */
176 if (Length
<= TargetDesc
->Buffer
.Length
)
178 /* Clear existing buffer and copy in the new one */
180 ACPI_MEMSET (TargetDesc
->Buffer
.Pointer
, 0, TargetDesc
->Buffer
.Length
);
181 ACPI_MEMCPY (TargetDesc
->Buffer
.Pointer
, Buffer
, Length
);
183 #ifdef ACPI_OBSOLETE_BEHAVIOR
185 * NOTE: ACPI versions up to 3.0 specified that the buffer must be
186 * truncated if the string is smaller than the buffer. However, "other"
187 * implementations of ACPI never did this and thus became the defacto
188 * standard. ACPI 3.0A changes this behavior such that the buffer
189 * is no longer truncated.
194 * If the original source was a string, we must truncate the buffer,
195 * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer
196 * copy must not truncate the original buffer.
198 if (OriginalSrcType
== ACPI_TYPE_STRING
)
200 /* Set the new length of the target */
202 TargetDesc
->Buffer
.Length
= Length
;
208 /* Truncate the source, copy only what will fit */
210 ACPI_MEMCPY (TargetDesc
->Buffer
.Pointer
, Buffer
,
211 TargetDesc
->Buffer
.Length
);
213 ACPI_DEBUG_PRINT ((ACPI_DB_INFO
,
214 "Truncating source buffer from %X to %X\n",
215 Length
, TargetDesc
->Buffer
.Length
));
220 TargetDesc
->Buffer
.Flags
= SourceDesc
->Buffer
.Flags
;
221 TargetDesc
->Common
.Flags
&= ~AOPOBJ_STATIC_POINTER
;
222 return_ACPI_STATUS (AE_OK
);
226 /*******************************************************************************
228 * FUNCTION: AcpiExStoreStringToString
230 * PARAMETERS: SourceDesc - Source object to copy
231 * TargetDesc - Destination object of the copy
235 * DESCRIPTION: Copy a String object to another String object
237 ******************************************************************************/
240 AcpiExStoreStringToString (
241 ACPI_OPERAND_OBJECT
*SourceDesc
,
242 ACPI_OPERAND_OBJECT
*TargetDesc
)
248 ACPI_FUNCTION_TRACE_PTR (ExStoreStringToString
, SourceDesc
);
251 /* We know that SourceDesc is a string by now */
253 Buffer
= ACPI_CAST_PTR (UINT8
, SourceDesc
->String
.Pointer
);
254 Length
= SourceDesc
->String
.Length
;
257 * Replace existing string value if it will fit and the string
258 * pointer is not a static pointer (part of an ACPI table)
260 if ((Length
< TargetDesc
->String
.Length
) &&
261 (!(TargetDesc
->Common
.Flags
& AOPOBJ_STATIC_POINTER
)))
264 * String will fit in existing non-static buffer.
265 * Clear old string and copy in the new one
267 ACPI_MEMSET (TargetDesc
->String
.Pointer
, 0,
268 (ACPI_SIZE
) TargetDesc
->String
.Length
+ 1);
269 ACPI_MEMCPY (TargetDesc
->String
.Pointer
, Buffer
, Length
);
274 * Free the current buffer, then allocate a new buffer
275 * large enough to hold the value
277 if (TargetDesc
->String
.Pointer
&&
278 (!(TargetDesc
->Common
.Flags
& AOPOBJ_STATIC_POINTER
)))
280 /* Only free if not a pointer into the DSDT */
282 ACPI_FREE (TargetDesc
->String
.Pointer
);
285 TargetDesc
->String
.Pointer
= ACPI_ALLOCATE_ZEROED (
286 (ACPI_SIZE
) Length
+ 1);
287 if (!TargetDesc
->String
.Pointer
)
289 return_ACPI_STATUS (AE_NO_MEMORY
);
292 TargetDesc
->Common
.Flags
&= ~AOPOBJ_STATIC_POINTER
;
293 ACPI_MEMCPY (TargetDesc
->String
.Pointer
, Buffer
, Length
);
296 /* Set the new target length */
298 TargetDesc
->String
.Length
= Length
;
299 return_ACPI_STATUS (AE_OK
);