exstorob.c revision 77424 
1
2/******************************************************************************
3 *
4 * Module Name: exstorob - AML Interpreter object store support, store to object
5 *              $Revision: 32 $
6 *
7 *****************************************************************************/
8
9/******************************************************************************
10 *
11 * 1. Copyright Notice
12 *
13 * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp.
14 * All rights reserved.
15 *
16 * 2. License
17 *
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
21 * property rights.
22 *
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
29 *
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;
38 *
39 * The above copyright and patent license is granted only if the following
40 * conditions are met:
41 *
42 * 3. Conditions
43 *
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.
55 *
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
66 * make.
67 *
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
72 * distribution.
73 *
74 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * Intel Code.
76 *
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.
81 *
82 * 4. Disclaimer and Export Compliance
83 *
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
90 * PARTICULAR PURPOSE.
91 *
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
99 * LIMITED REMEDY.
100 *
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.
115 *
116 *****************************************************************************/
117
118#define __EXSTOROB_C__
119
120#include "acpi.h"
121#include "acparser.h"
122#include "acdispat.h"
123#include "acinterp.h"
124#include "amlcode.h"
125#include "acnamesp.h"
126#include "actables.h"
127
128
129#define _COMPONENT          ACPI_EXECUTER
130        MODULE_NAME         ("exstorob")
131
132
133/*******************************************************************************
134 *
135 * FUNCTION:    AcpiExCopyBufferToBuffer
136 *
137 * PARAMETERS:  SourceDesc          - Source object to copy
138 *              TargetDesc          - Destination object of the copy
139 *
140 * RETURN:      Status
141 *
142 * DESCRIPTION: Copy a buffer object to another buffer object.
143 *
144 ******************************************************************************/
145
146ACPI_STATUS
147AcpiExCopyBufferToBuffer (
148    ACPI_OPERAND_OBJECT     *SourceDesc,
149    ACPI_OPERAND_OBJECT     *TargetDesc)
150{
151    UINT32                  Length;
152    UINT8                   *Buffer;
153
154
155    /*
156     * We know that SourceDesc is a buffer by now
157     */
158    Buffer = (UINT8 *) SourceDesc->Buffer.Pointer;
159    Length = SourceDesc->Buffer.Length;
160
161    /*
162     * If target is a buffer of length zero, allocate a new
163     * buffer of the proper length
164     */
165    if (TargetDesc->Buffer.Length == 0)
166    {
167        TargetDesc->Buffer.Pointer = AcpiUtAllocate (Length);
168        if (!TargetDesc->Buffer.Pointer)
169        {
170            return (AE_NO_MEMORY);
171        }
172
173        TargetDesc->Buffer.Length = Length;
174    }
175
176    /*
177     * Buffer is a static allocation,
178     * only place what will fit in the buffer.
179     */
180    if (Length <= TargetDesc->Buffer.Length)
181    {
182        /* Clear existing buffer and copy in the new one */
183
184        MEMSET(TargetDesc->Buffer.Pointer, 0, TargetDesc->Buffer.Length);
185        MEMCPY(TargetDesc->Buffer.Pointer, Buffer, Length);
186    }
187
188    else
189    {
190        /*
191         * Truncate the source, copy only what will fit
192         */
193        MEMCPY(TargetDesc->Buffer.Pointer, Buffer, TargetDesc->Buffer.Length);
194
195        DEBUG_PRINT (ACPI_INFO,
196            ("ExCopyBufferToBuffer: Truncating src buffer from %X to %X\n",
197            Length, TargetDesc->Buffer.Length));
198    }
199
200    return (AE_OK);
201}
202
203
204/*******************************************************************************
205 *
206 * FUNCTION:    AcpiExCopyStringToString
207 *
208 * PARAMETERS:  SourceDesc          - Source object to copy
209 *              TargetDesc          - Destination object of the copy
210 *
211 * RETURN:      Status
212 *
213 * DESCRIPTION: Copy a String object to another String object
214 *
215 ******************************************************************************/
216
217ACPI_STATUS
218AcpiExCopyStringToString (
219    ACPI_OPERAND_OBJECT     *SourceDesc,
220    ACPI_OPERAND_OBJECT     *TargetDesc)
221{
222    UINT32                  Length;
223    UINT8                   *Buffer;
224
225
226    /*
227     * We know that SourceDesc is a string by now.
228     */
229    Buffer = (UINT8 *) SourceDesc->String.Pointer;
230    Length = SourceDesc->String.Length;
231
232    /*
233     * Setting a string value replaces the old string
234     */
235    if (Length < TargetDesc->String.Length)
236    {
237        /* Clear old string and copy in the new one */
238
239        MEMSET(TargetDesc->String.Pointer, 0, TargetDesc->String.Length);
240        MEMCPY(TargetDesc->String.Pointer, Buffer, Length);
241    }
242
243    else
244    {
245        /*
246         * Free the current buffer, then allocate a buffer
247         * large enough to hold the value
248         */
249        if (TargetDesc->String.Pointer &&
250            !AcpiTbSystemTablePointer (TargetDesc->String.Pointer))
251        {
252            /*
253             * Only free if not a pointer into the DSDT
254             */
255            AcpiUtFree(TargetDesc->String.Pointer);
256        }
257
258        TargetDesc->String.Pointer = AcpiUtAllocate (Length + 1);
259        if (!TargetDesc->String.Pointer)
260        {
261            return (AE_NO_MEMORY);
262        }
263        TargetDesc->String.Length = Length;
264
265
266        MEMCPY(TargetDesc->String.Pointer, Buffer, Length);
267    }
268
269    return (AE_OK);
270}
271
272
273