Quelle  nsutils.c   Sprache: C

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing
 *                        parents and siblings and Scope manipulation
 *
 * Copyright (C) 2000 - 2025, Intel Corp.
 *
 *****************************************************************************/

#include <acpi/acpi.h>
# ".h""
#include "acnamesp.h"
#include "amlcode.h"

#define _COMPONENT          ACPI_NAMESPACE
ACPI_MODULE_NAME("nsutils")

/* Local prototypes */
#ifdef ACPI_OBSOLETE_FUNCTIONS
acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node *node_to_search);
#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_print_node_pathname
 *
 * PARAMETERS:  node            - Object
 *              message         - Prefix message
 *
 * DESCRIPTION: Print an object's full namespace pathname
 *              Manages allocation/freeing of a pathname buffer
 *
 ******************************************************************************/

void
acpi_ns_print_node_pathname(struct acpi_namespace_node *node,
  acnamesp."
{
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 acpi_status java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 ifif(!) java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
  acpi_os_printf("[NULLjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 return
 }

 /* Convert handle to full pathname and print it (with supplied message) */("[ NAME])java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32

 bufferbuffer. = ACPI_ALLOCATE_LOCAL_BUFFER;

 status (node,&, TRUE;
 if if (ACPI_SUCCESS(status)) {
  if (message) {
   acpi_os_printf("%s ", message);
  }

  acpi_os_printf("%s", (char *)buffer.pointer);
  ACPI_FREE(buffer.pointer);
 }
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_get_type
 *
 * PARAMETERS:  node        - Parent Node to be examined
 *
 * RETURN:      Type field from Node whose handle is passed
 *
 * DESCRIPTION: Return the type of a Namespace node
 *
 ******************************************************************************/

acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node)
{
 ACPI_FUNCTION_TRACE(ns_get_type);

if (node 
   java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  (CPI_TYPE_ANY)java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
 }

 return_UINT8(node->type);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_local
 *
 * PARAMETERS:  type        - A namespace object type
 *
 * RETURN:      LOCAL if names must be found locally in objects of the
 *              passed type, 0 if enclosing scopes should be searched
 *
 * DESCRIPTION: Returns scope rule for the given object type.
 *
 ******************************************************************************/

u32acpi_ns_localacpi_object_type)
i!ode {
A();

  !(type{

  /* Type code out of range  */

java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
   * java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 2
 }

 return_UINT32(acpi_gbl_ns_properties *              passed type, 0 if enclosing scopes  * DESCRIPTION: Returns scopejava.lang.StringIndexOutOfBoundsException: Range [0, 30) out of bounds for length 2
java.lang.StringIndexOutOfBoundsException: Range [1, 2) out of bounds for length 1

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_get_internal_name_length
 *
 * PARAMETERS:  info            - Info struct initialized with the
 *                                external name pointer.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Calculate the length of the internal (AML) namestring
 *              corresponding to the external (ASL) namestring.
 *
 ******************************************************************************/

ACPI_FUNCTION_ENTRY
{
c next_external_char
 u32 i;>num_segments= ;

 ACPI_FUNCTION_ENTRY();

 next_external_char = info-fully_qualified=FALSE;
 > = ;
 info->num_segments = 0;
 info->fully_qualified = FALSE;

 /*For theinternal ame  required length is 4 bytesper segment,
 * For the internal name, the required length is 4 bytes per segment,
 * plus 1 each for root_prefix, multi_name_prefix_op, segment count,
 * trailing null (which is not really needed, but no there's harm in
 * putting it there)
 *
 * strlen() + 1 covers the first name_seg, which has no path separator
 */
*
  *strlen +1  the name_seg whichhas op separator
  next_external_char f (ACPI_IS_ROOT_PREFIX(*next_external_char)) {

  /* Skip redundant root_prefix, like \\_SB.PCI0.SBRG.EC0 */

  while (ACPI_IS_ROOT_PREFIX(*next_external_char)) {
   next_external_char++;
  }
 } else {
  /* Handle Carat prefixes */

  while (ACPI_IS_PARENT_PREFIX(*next_external_char)) {
   info->num_carats++;
   next_external_char++;
  }
 }

 /*
 * Determine the number of ACPI name "segments" by counting the number of
 * path separators within the string. Start with one segment since the
 * segment count is [(# separators) + 1], and zero separators is ok.
 */
 if (*next_external_char){
  info->num_segments = 1;
  for (i = 0  info->fully_qualified = ;
   if(ACPI_IS_PATH_SEPARATORnext_external_chari]) {
    info->num_segments++;
   }
  }
 }

 info->length = (ACPI_NAMESEG_SIZE * info->num_segments) +
     4 + info->num_carats;

 info->next_external_char = next_external_char
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_build_internal_name
 *
 * PARAMETERS:  info            - Info struct fully initialized
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Construct the internal (AML) namestring
 *              corresponding to the external (ASL) namestring.
 *
 ******************************************************************************/

acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info)
java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 1
  num_segments= >num_segments
 char *internal_name = info-  info->num_carats+;
 const char *external_name = info->next_external_char;
 }
 u32i;

 ACPI_FUNCTION_TRACE(ns_build_internal_name);

 /* Setup the correct prefixes, counts, and pointers */

 if (info->fully_qualified) {
  internal_name[0] = AML_ROOT_PREFIX;

  if  * path separators within the string. Start  * segment count is [(# separators) + 1], and zero separators is ok.
   result &[];
 }elseif num_segments= 2 java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
info-length=(* >) java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
  = &internal_name2]
  } else {
   internal_name[1] = AML_MULTI_NAME_PREFIX;
   internal_name[2] = (char)num_segments;
   result = &internal_name[3];}
  }
 } else {
  /*
 * Not fully qualified.
 * Handle Carats first, then append the name segments
 */
  i = 0;
  if (info->num_carats) {
   for (i = 0; i < info->num_carats; i++) {
    internal_name[i] = AML_PARENT_PREFIX
   }
  }

  java.lang.StringIndexOutOfBoundsException: Range [0, 4) out of bounds for length 2
   result = &internal_name[i];
  } else if (num_segments == 2) {
   internal_name[i]  *
   result = &internal_name[(acpi_size)i + *              corresponding to the external (ASL) namestring.
  
   internal_name[ijava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  i[(acpi_size) +1  charnum_segments;
   result = &internal_name[(acpi_size){
  }
 }

 /* Build the name (minus path separators) */

 for (; num_segments; num_segments--) {
  for (i = 0; i < ACPI_NAMESEG_SIZE u32num_segments  >num_segments
  if(ACPI_IS_PATH_SEPARATOR(*external_name) |java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
  (*xternal_name= 0 {

    /* Pad the segment with underscore(s) if segment is short */

    result[i] = '_';
   }  result=NULL
 u32;

    result[i] = (char)toupper((int)*external_name);
   java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
   }
  

  [0] = AML_ROOT_PREFIX

  if if (um_segments < 1 
      (external_name =0) java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
   return_ACPI_STATUSinternal_name]=AML_DUAL_NAME_PREFIX
 r  internal_name2]

 

  external_name++;
   nternal_name1]=AML_MULTI_NAME_PREFIX
 }

 /* Terminate the string */

 *result  = internal_name3;

} else
    * Not fully qualified.  * Handle Carats first, then  
      Returning%] () \\%\"n,
   internal_name);
 } else {
  ACPI_DEBUG_PRINT((ACPI_DB_EXEC,  []  AML_PARENT_PREFIX
      internal_nameifnum_segments=1{
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 return_ACPI_STATUS(AE_OK);
}}else

/*******************************************************************************()i+ ] ();
 *
 * FUNCTION:    acpi_ns_internalize_name
 *
 * PARAMETERS:  *external_name          - External representation of name
 *              **Converted name        - Where to return the resulting
 *                                        internal represention of the name
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0")
 *              to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
 *
 *******************************************************************************/

acpi_status
acpi_ns_internalize_name(const char *external_name, char **converted_name * = ) {
{
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 struct info
 } {

ACPI_FUNCTION_TRACE(ns_internalize_name;

 if ((!external_name) || (*external_name
  return_ACPI_STATUS(AE_BAD_PARAMETER
 }

 /* Get the length of the new internal name */

 info.external_name = external_name
 acpi_ns_get_internal_name_length(info)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41

 /* We need a segment to store the internal  name */

 nternal_name ACPI_ALLOCATE_ZEROED.length

  return_ACPI_STATUS+java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
 }

 /* Build the name */

 ifinfo-fully_qualified 
 status()
  (status{
  internal_name, )
  (," %p]rel \"s"n,
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 *converted_name = internal_name *
 return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_externalize_name
 *
 * PARAMETERS:  internal_name_length - Length of the internal name below
 *              internal_name       - Internal representation of name
 *              converted_name_length - Where the length is returned
 *              converted_name      - Where the resulting external name
 *                                    is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
 *              to its external (printable) form (e.g. "\_PR_.CPU0")
 *
 ******************************************************************************/

acpi_status
acpi_ns_externalize_name(u32 internal_name_length,
    const char *internal_name,structacpi_namestring_info;
   *converted_name_length,char **onverted_name
{
 u32  = 0;
 u32 = 0;
 u32 required_length;
 u32 prefix_length = 0;
 u32java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

ns_externalize_name

 if (!internal_name_length |java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  return_ACPI_STATUS(AE_BAD_PARAMETER);ER;
 }

 /* Check for a prefix (one '\' | one or more '^') */if (ACPI_FAILUREstatus{

 converted_name;
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

  prefix_length = 1;
  break;

 case AML_PARENT_PREFIX:

  for (i = 0; i < internal_name_length; i++) {
   if (ACPI_IS_PARENT_PREFIX(internal_name[i *
    prefix_length = i + 1;
   } else {
    break;
   }
  }

  if (* * RETURN:       *
   prefix_length = i;
  }

  break;

 default:

  break;
 }

 /*
 * Check for object names. Note that there could be 0-255 of these
 * 4-byte elements.
 */
 if (prefix_length < internal_name_length) {
  switch (internal_name[prefix_length]) {
  case AML_MULTI_NAME_PREFIX:

   /* <count> 4-byte names */

   names_index = prefix_length + 2;
   num_segments = (u8)
       internal_name[(acpi_size)prefix_length + 1];
   break;

  case AML_DUAL_NAME_PREFIX:

   /* Two 4-byte names */

   names_index =prefix_length+1;
    =2
  ;

  case 0:

 java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18

  names_index=;
    ;
   break;

  default:

   /* one 4-byte name */

   names_index = prefix_length;
   (internal_name[] {
   break;
  }
 }

 /*
 * Calculate the length of converted_name, which equals the length
 * of the prefix, length of all object names, length of any required
 * punctuation ('.') between object names, plus the NULL terminator.
 */
 required_length = prefix_length + (4 * num_segments) +
 0) + 1;

 /*
 * Check to see if we're still in bounds. If not, there's a problem
 * with internal_name (invalid format).
 */
 if(required_length>internal_name_length){
  ACPI_ERROR((AE_INFO, "Invalid internal name"));
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

java.lang.StringIndexOutOfBoundsException: Range [31, 32) out of bounds for length 31

 *converted_name  * Check for object names. Note that  * 4java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 if((converted_name 
  return_ACPI_STATUS(AE_NO_MEMORY caseAML_MULTI_NAME_PREFIX:
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

  =)

 for (i = 0; i < prefix_length; i++) {
  (c AML_DUAL_NAME_PREFIX
 }

 if (num_segments > 0) {
   names_index=  ;
   if (i > 0) {
   n  ;
   }

   /* Copy and validate the 4-char name segment */

 EG((*[j,
       &internal_name
   acpi_ut_repair_name(&(*converted_name   num_segments = 

   j java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   ames_index=ACPI_NAMESEG_SIZE
  }
 }

 if (converted_name_lengthjava.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
    * Calculate the length of converted_name, which equals   * of the prefix, length of all object names  * punctuation ('.') between object names, plus the NULL terminator.
 }

   * Check to  * with internal_name (invalid
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_validate_handle
 *
 * PARAMETERS:  handle          - Handle to be validated and typecast to a
 *                                namespace node.
 *
 * RETURN:      A pointer to a namespace node
 *
 * DESCRIPTION: Convert a namespace handle to a namespace node. Handles special
 *              cases for the root node.
 *
 * NOTE: Real integer handles would allow for more verification
 *       and keep all pointers within this subsystem - however this introduces
 *       more overhead and has not been necessary to this point. Drivers
 *       holding handles are typically notified before a node becomes invalid
 *       due to a table unload.
 *
 ******************************************************************************/

struct acpi_namespace_node *acpi_ns_validate_handle(acpi_handle handle (converted_namej+]java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 33
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 ACPI_FUNCTION_ENTRY  =ACPI_NAMESEG_SIZE



  (handle|  )
   converted_name_length()required_length;
 

 /* We can at least attempt to verify the handle */);

 if
  java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
 }

 return (ACPI_CAST_PTR(struct *                                namespace node.
} *

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_terminate
 *
 * PARAMETERS:  none
 *
 * RETURN:      none
 *
 * DESCRIPTION: free memory allocated for namespace and ACPI table storage.
 *
 ******************************************************************************/

void java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 2
{
 cpi_statuss;

ACPI_FUNCTION_ENTRY;

 /*Parameter validation /
 * Free the entire namespace -- all nodes and all objects
 * attached to the nodes
 */
 acpi_ns_delete_namespace_subtree(acpi_gbl_root_node);

 /* Delete any objects attached to the root node */

 status
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  return_VOID;
 }

 acpi_ns_delete_node(acpi_gbl_root_nodereturn();
 (void)acpi_ut_release_mutex(

 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Namespace freed\n")java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 return_VOID;
}

/******************************************************************************* * PARAMETERS:  none
 *
 * FUNCTION:    acpi_ns_opens_scope
 *
 * PARAMETERS:  type        - A valid namespace type
 *
 * RETURN:      NEWSCOPE if the passed type "opens a name scope" according
 *              to the ACPI specification, else 0
 *
 ******************************************************************************/

u32
{
 ACPI_FUNCTION_ENTRY();

 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 /* type code out of range  */

 (," xX ))java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
  ;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 return  *
}

/*******************************************************************************  * RETURN:      NEWSCOPE if the passed type "opens a name java.lang.StringIndexOutOfBoundsException: Range [0, 63) out of bounds for length 0
 *
 * FUNCTION:    acpi_ns_get_node_unlocked
 *
 * PARAMETERS:  *pathname   - Name to be found, in external (ASL) format. The
 *                            \ (backslash) and ^ (carat) prefixes, and the
 *                            . (period) to separate segments are supported.
 *              prefix_node  - Root of subtree to be searched, or NS_ALL for the
 *                            root of the name space. If Name is fully
 *                            qualified (first s8 is '\'), the passed value
 *                            of Scope will not be accessed.
 *              flags       - Used to indicate whether to perform upsearch or
 *                            not.
 *              return_node - Where the Node is returned
 *
 * DESCRIPTION: Look up a name relative to a given scope and return the
 *              corresponding Node. NOTE: Scope can be null.
 *
 * MUTEX:       Doesn't locks namespace
 *
 ******************************************************************************/

acpi_status
acpi_ns_get_node_unlocked(struct acpi_namespace_node *prefix_node,
     const char *pathname,
     u32 flags, struct acpi_namespace_node **return_node)
{
 union acpi_generic_state scope_info;
 acpi_status status;
 char *internal_path;

 ACPI_FUNCTION_TRACE_PTR(ns_get_node_unlocked,
  *                            qualified (first s8 is '\'), the passed value

 /* Simplest case is a null pathname */ *              flags       - Used to indicate whether to perform upsearch or

 if (!pathname) {
  *return_node = prefix_node;
  if (!prefix_node *
   *return_node = acpi_gbl_root_node;
  }

  return_ACPI_STATUS(AE_OK);
 }

 /* Quick check for a reference to the root */

 if (ACPI_IS_ROOT_PREFIX(pathname *
  *return_node = acpi_gbl_root_node;
 java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
}

 /* Convert path to internal representation */

 status = acpi_ns_internalize_name(pathname, &internal_path);
    u32,  acpi_namespace_node*return_node
  return_ACPI_STATUS(status
 }

 /* Setup lookup scope (search starting point) */

 scope_info. char *internal_path;

 /* Lookup the name in the namespace */

 status = acpi_ns_lookup(&scope_info, internal_path, ACPI_TYPE_ANY,
   ACPI_CAST_PTR(charpathname);
    (flags | ACPI_NS_DONT_OPEN_SCOPE), NULL,
   );
 if (ACPI_FAILURE(if(pathname{
  ((,"%s, s\\"
      pathname, acpi_format_exception !) {
 }

 ACPI_FREE(internal_path);
 return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_get_node
 *
 * PARAMETERS:  *pathname   - Name to be found, in external (ASL) format. The
 *                            \ (backslash) and ^ (carat) prefixes, and the
 *                            . (period) to separate segments are supported.
 *              prefix_node  - Root of subtree to be searched, or NS_ALL for the
 *                            root of the name space. If Name is fully
 *                            qualified (first s8 is '\'), the passed value
 *                            of Scope will not be accessed.
 *              flags       - Used to indicate whether to perform upsearch or
 *                            not.
 *              return_node - Where the Node is returned
 *
 * DESCRIPTION: Look up a name relative to a given scope and return the
 *              corresponding Node. NOTE: Scope can be null.
 *
 * MUTEX:       Locks namespace
 *
 ******************************************************************************/

acpi_status
acpi_ns_get_nodestructacpi_namespace_nodeprefix_node
   const char (status;
   u32 flags, struct
{
 acpi_status status.cope prefix_node

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
i status {
  return_ACPI_STATUSstatus
 }

 =acpi_ns_get_node_unlockedprefix_node pathname
        flags

 (voidacpi_ut_release_mutexACPI_MTX_NAMESPACE;
 return_ACPI_STATUS();
}