| /******************************************************************************* |
| * |
| * Module Name: nsnames - Name manipulation and search |
| * |
| ******************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2016, Intel Corp. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions, and the following disclaimer, |
| * without modification. |
| * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| * substantially similar to the "NO WARRANTY" disclaimer below |
| * ("Disclaimer") and any redistribution must be conditioned upon |
| * including a substantially similar Disclaimer requirement for further |
| * binary redistribution. |
| * 3. Neither the names of the above-listed copyright holders nor the names |
| * of any contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * NO WARRANTY |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGES. |
| */ |
| |
| #include "acpi.h" |
| #include "accommon.h" |
| #include "amlcode.h" |
| #include "acnamesp.h" |
| |
| |
| #define _COMPONENT ACPI_NAMESPACE |
| ACPI_MODULE_NAME ("nsnames") |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiNsGetExternalPathname |
| * |
| * PARAMETERS: Node - Namespace node whose pathname is needed |
| * |
| * RETURN: Pointer to storage containing the fully qualified name of |
| * the node, In external format (name segments separated by path |
| * separators.) |
| * |
| * DESCRIPTION: Used to obtain the full pathname to a namespace node, usually |
| * for error and debug statements. |
| * |
| ******************************************************************************/ |
| |
| char * |
| AcpiNsGetExternalPathname ( |
| ACPI_NAMESPACE_NODE *Node) |
| { |
| char *NameBuffer; |
| |
| |
| ACPI_FUNCTION_TRACE_PTR (NsGetExternalPathname, Node); |
| |
| |
| NameBuffer = AcpiNsGetNormalizedPathname (Node, FALSE); |
| return_PTR (NameBuffer); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiNsGetPathnameLength |
| * |
| * PARAMETERS: Node - Namespace node |
| * |
| * RETURN: Length of path, including prefix |
| * |
| * DESCRIPTION: Get the length of the pathname string for this node |
| * |
| ******************************************************************************/ |
| |
| ACPI_SIZE |
| AcpiNsGetPathnameLength ( |
| ACPI_NAMESPACE_NODE *Node) |
| { |
| ACPI_SIZE Size; |
| |
| |
| ACPI_FUNCTION_ENTRY (); |
| |
| |
| Size = AcpiNsBuildNormalizedPath (Node, NULL, 0, FALSE); |
| return (Size); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiNsHandleToPathname |
| * |
| * PARAMETERS: TargetHandle - Handle of named object whose name is |
| * to be found |
| * Buffer - Where the pathname is returned |
| * NoTrailing - Remove trailing '_' for each name |
| * segment |
| * |
| * RETURN: Status, Buffer is filled with pathname if status is AE_OK |
| * |
| * DESCRIPTION: Build and return a full namespace pathname |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiNsHandleToPathname ( |
| ACPI_HANDLE TargetHandle, |
| ACPI_BUFFER *Buffer, |
| BOOLEAN NoTrailing) |
| { |
| ACPI_STATUS Status; |
| ACPI_NAMESPACE_NODE *Node; |
| ACPI_SIZE RequiredSize; |
| |
| |
| ACPI_FUNCTION_TRACE_PTR (NsHandleToPathname, TargetHandle); |
| |
| |
| Node = AcpiNsValidateHandle (TargetHandle); |
| if (!Node) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| /* Determine size required for the caller buffer */ |
| |
| RequiredSize = AcpiNsBuildNormalizedPath (Node, NULL, 0, NoTrailing); |
| if (!RequiredSize) |
| { |
| return_ACPI_STATUS (AE_BAD_PARAMETER); |
| } |
| |
| /* Validate/Allocate/Clear caller buffer */ |
| |
| Status = AcpiUtInitializeBuffer (Buffer, RequiredSize); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| /* Build the path in the caller buffer */ |
| |
| (void) AcpiNsBuildNormalizedPath (Node, Buffer->Pointer, |
| RequiredSize, NoTrailing); |
| if (ACPI_FAILURE (Status)) |
| { |
| return_ACPI_STATUS (Status); |
| } |
| |
| ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s [%X]\n", |
| (char *) Buffer->Pointer, (UINT32) RequiredSize)); |
| return_ACPI_STATUS (AE_OK); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiNsBuildNormalizedPath |
| * |
| * PARAMETERS: Node - Namespace node |
| * FullPath - Where the path name is returned |
| * PathSize - Size of returned path name buffer |
| * NoTrailing - Remove trailing '_' from each name segment |
| * |
| * RETURN: Return 1 if the AML path is empty, otherwise returning (length |
| * of pathname + 1) which means the 'FullPath' contains a trailing |
| * null. |
| * |
| * DESCRIPTION: Build and return a full namespace pathname. |
| * Note that if the size of 'FullPath' isn't large enough to |
| * contain the namespace node's path name, the actual required |
| * buffer length is returned, and it should be greater than |
| * 'PathSize'. So callers are able to check the returning value |
| * to determine the buffer size of 'FullPath'. |
| * |
| ******************************************************************************/ |
| |
| UINT32 |
| AcpiNsBuildNormalizedPath ( |
| ACPI_NAMESPACE_NODE *Node, |
| char *FullPath, |
| UINT32 PathSize, |
| BOOLEAN NoTrailing) |
| { |
| UINT32 Length = 0, i; |
| char Name[ACPI_NAME_SIZE]; |
| BOOLEAN DoNoTrailing; |
| char c, *Left, *Right; |
| ACPI_NAMESPACE_NODE *NextNode; |
| |
| |
| ACPI_FUNCTION_TRACE_PTR (NsBuildNormalizedPath, Node); |
| |
| |
| #define ACPI_PATH_PUT8(Path, Size, Byte, Length) \ |
| do { \ |
| if ((Length) < (Size)) \ |
| { \ |
| (Path)[(Length)] = (Byte); \ |
| } \ |
| (Length)++; \ |
| } while (0) |
| |
| /* |
| * Make sure the PathSize is correct, so that we don't need to |
| * validate both FullPath and PathSize. |
| */ |
| if (!FullPath) |
| { |
| PathSize = 0; |
| } |
| |
| if (!Node) |
| { |
| goto BuildTrailingNull; |
| } |
| |
| NextNode = Node; |
| while (NextNode && NextNode != AcpiGbl_RootNode) |
| { |
| if (NextNode != Node) |
| { |
| ACPI_PATH_PUT8(FullPath, PathSize, AML_DUAL_NAME_PREFIX, Length); |
| } |
| |
| ACPI_MOVE_32_TO_32 (Name, &NextNode->Name); |
| DoNoTrailing = NoTrailing; |
| for (i = 0; i < 4; i++) |
| { |
| c = Name[4-i-1]; |
| if (DoNoTrailing && c != '_') |
| { |
| DoNoTrailing = FALSE; |
| } |
| if (!DoNoTrailing) |
| { |
| ACPI_PATH_PUT8(FullPath, PathSize, c, Length); |
| } |
| } |
| |
| NextNode = NextNode->Parent; |
| } |
| |
| ACPI_PATH_PUT8(FullPath, PathSize, AML_ROOT_PREFIX, Length); |
| |
| /* Reverse the path string */ |
| |
| if (Length <= PathSize) |
| { |
| Left = FullPath; |
| Right = FullPath+Length - 1; |
| |
| while (Left < Right) |
| { |
| c = *Left; |
| *Left++ = *Right; |
| *Right-- = c; |
| } |
| } |
| |
| /* Append the trailing null */ |
| |
| BuildTrailingNull: |
| ACPI_PATH_PUT8 (FullPath, PathSize, '\0', Length); |
| |
| #undef ACPI_PATH_PUT8 |
| |
| return_UINT32 (Length); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiNsGetNormalizedPathname |
| * |
| * PARAMETERS: Node - Namespace node whose pathname is needed |
| * NoTrailing - Remove trailing '_' from each name segment |
| * |
| * RETURN: Pointer to storage containing the fully qualified name of |
| * the node, In external format (name segments separated by path |
| * separators.) |
| * |
| * DESCRIPTION: Used to obtain the full pathname to a namespace node, usually |
| * for error and debug statements. All trailing '_' will be |
| * removed from the full pathname if 'NoTrailing' is specified.. |
| * |
| ******************************************************************************/ |
| |
| char * |
| AcpiNsGetNormalizedPathname ( |
| ACPI_NAMESPACE_NODE *Node, |
| BOOLEAN NoTrailing) |
| { |
| char *NameBuffer; |
| ACPI_SIZE Size; |
| |
| |
| ACPI_FUNCTION_TRACE_PTR (NsGetNormalizedPathname, Node); |
| |
| |
| /* Calculate required buffer size based on depth below root */ |
| |
| Size = AcpiNsBuildNormalizedPath (Node, NULL, 0, NoTrailing); |
| if (!Size) |
| { |
| return_PTR (NULL); |
| } |
| |
| /* Allocate a buffer to be returned to caller */ |
| |
| NameBuffer = ACPI_ALLOCATE_ZEROED (Size); |
| if (!NameBuffer) |
| { |
| ACPI_ERROR ((AE_INFO, |
| "Could not allocate %u bytes", (UINT32) Size)); |
| return_PTR (NULL); |
| } |
| |
| /* Build the path in the allocated buffer */ |
| |
| (void) AcpiNsBuildNormalizedPath (Node, NameBuffer, Size, NoTrailing); |
| |
| return_PTR (NameBuffer); |
| } |
