mirror of
https://github.com/acpica/acpica/
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294 lines
9.8 KiB
C
294 lines
9.8 KiB
C
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/******************************************************************************
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*
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* Module Name: nsstack - Scope stack manipulation
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999, Intel Corp. All rights
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* reserved.
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*
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* 2. License
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*
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* 2.1. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") a license
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* under Intel's copyrights in the base code distributed originally by Intel
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* ("Original Intel Code") to copy, make derivatives, distribute, use and
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* display any portion of the Covered Code in any form; and
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*
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* 2.2. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (without the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions to
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* or modifications of the Original Intel Code. No other license or right is
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* granted directly or by implication, estoppel or otherwise;
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*
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* the above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of source code of any substantial portion of the Covered
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* Code or modification must include the above Copyright Notice, the above
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* License, this list of Conditions, and the following Disclaimer and Export
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* Compliance provision. In addition, Licensee must cause all Covered Code to
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* which Licensee contributes to contain a file documenting the changes
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* Licensee made to create that Covered Code and the date of any change.
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* Licensee must include in that file the documentation of any changes made by
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* any predecessor Licensee. Licensee must include a prominent statement that
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* the modification is derived, directly or indirectly, from Original Intel
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* Code.
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*
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* 3.2. Redistribution in binary form of any substantial portion of the Covered
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* Code or modification must reproduce the above Copyright Notice, and the
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* following Disclaimer and Export Compliance provision in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3.3. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.4. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or re-
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* exports any such software from a foreign destination, Licensee shall ensure
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* that the distribution and export/re-export of the software is in compliance
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* with all laws, regulations, orders, or other restrictions of the U.S. Export
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* Administration Regulations. Licensee agrees that neither it nor any of its
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* subsidiaries will export/re-export any technical data, process, software, or
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* service, directly or indirectly, to any country for which the United States
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* government or any agency thereof requires an export license, other
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* governmental approval, or letter of assurance, without first obtaining such
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* license, approval or letter.
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*
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*****************************************************************************/
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#define __NSSTACK_C__
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#include <acpi.h>
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#include <interpreter.h>
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#include <namespace.h>
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#define _THIS_MODULE "nsstack.c"
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#define _COMPONENT NAMESPACE
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static ST_KEY_DESC_TABLE KDT[] = {
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{"0000", '1', "NsPushCurrentScope: null scope passed", "NsPushCurrentScope: null scope passed"},
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{"0001", 'W', "NsPushCurrentScope: type code out of range", "NsPushCurrentScope: type code out of range"},
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{"0002", '1', "Scope stack overflow", "Scope stack overflow"},
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{"0003", '1', "NsPushMethodScope: null scope passed", "NsPushMethodScope: null scope passed"},
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{"0004", '1', "Scope stack overflow", "Scope stack overflow"},
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{"0005", 'W', "NsPopCurrent: type code out of range", "NsPopCurrent: type code out of range"},
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{NULL, 'I', NULL, NULL}
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};
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/****************************************************************************
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*
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* FUNCTION: NsPushCurrentScope
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*
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* PARAMETERS: nte *NewScope, name to be made current
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* NsType Type, type of frame being pushed
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*
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* DESCRIPTION: Push the current scope on the scope stack, and make the
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* passed nte current.
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*
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***************************************************************************/
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void
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NsPushCurrentScope (nte *NewScope, NsType Type)
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{
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FUNCTION_TRACE ("NsPushCurrentScope");
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if (!NewScope)
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{
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/* invalid scope */
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REPORT_ERROR (&KDT[0]);
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}
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else
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{
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if (OUTRANGE (Type, NsTypeNames) ||
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BadType == NsTypeNames[Type])
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{
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/* type code out of range */
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REPORT_WARNING (&KDT[1]);
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}
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if (CurrentScope < &ScopeStack[MAXNEST-1]) /* check for overflow */
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{
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/* no Scope stack overflow */
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CurrentScope++;
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CurrentScope->Scope = NewScope;
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CurrentScope->Type = Type;
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if (CurrentScope->Scope == Root)
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{
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NsCurrentSize = NsRootSize;
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}
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else
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{
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NsCurrentSize = TABLSIZE;
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}
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}
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else
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{
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/* Scope stack overflow */
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REPORT_ERROR (&KDT[2]);
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}
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}
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}
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/****************************************************************************
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*
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* FUNCTION: NsPushMethodScope
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*
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* PARAMETERS: NsHandle NewScope, name to be made current
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*
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* DESCRIPTION: Push the current scope on the scope stack, and make the
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* passed nte current.
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*
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***************************************************************************/
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void
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NsPushMethodScope (NsHandle NewScope)
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{
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FUNCTION_TRACE ("NsPushMethodScope");
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if (!NewScope ||
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(nte *) 0 == ((nte *) NewScope)->ChildScope)
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{
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/* NewScope or NewScope->ChildScope invalid */
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REPORT_ERROR (&KDT[3]);
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}
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else
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{
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if (CurrentScope < &ScopeStack[MAXNEST-1]) /* check for overflow */
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{
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NsPushCurrentScope (((nte *) NewScope)->ChildScope, Method);
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}
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else
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{
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/* scope stack overflow */
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REPORT_ERROR (&KDT[4]);
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}
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}
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}
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/****************************************************************************
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*
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* FUNCTION: NsPopCurrent
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*
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* PARAMETERS: NsType Type The type of frame to be found
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*
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* DESCRIPTION: Pop the scope stack until a frame of the requested type
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* is found.
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*
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* RETURN: Count of frames popped. If no frame of the requested type
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* was found, the count is returned as a negative number and
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* the scope stack is emptied (which sets the current scope
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* to the root). If the scope stack was empty at entry, the
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* function is a no-op and returns 0.
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*
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***************************************************************************/
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INT32
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NsPopCurrent (NsType Type)
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{
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INT32 Count = 0;
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FUNCTION_TRACE ("NsPopCurrent");
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if (OUTRANGE (Type, NsTypeNames) || BadType == NsTypeNames[Type])
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{
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/* type code out of range */
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REPORT_WARNING (&KDT[5]);
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}
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DEBUG_PRINT (TRACE_EXEC, ("Popping Scope till type (%d) is found\n", Type));
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while (CurrentScope > &ScopeStack[0])
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{
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CurrentScope--;
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if (Root == CurrentScope->Scope)
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{
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NsCurrentSize = NsRootSize;
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}
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else
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{
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NsCurrentSize = TABLSIZE;
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}
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Count++;
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DEBUG_PRINT (TRACE_EXEC, ("Popped %d\n", (CurrentScope+1)->Type));
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if ((Any == Type) || (Type == (CurrentScope + 1)->Type))
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{
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DEBUG_PRINT (TRACE_EXEC, ("Found %d\n", Type));
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return Count;
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}
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}
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DEBUG_PRINT (TRACE_EXEC,("%d Not Found\n", Type));
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return -Count;
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}
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