From: "Laszlo Ersek" <lersek@redhat.com>
To: devel@edk2.groups.io
Cc: "Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Ray Ni" <ray.ni@intel.com>,
"Zhichao Gao" <zhichao.gao@intel.com>
Subject: [PATCH v2 06/10] ShellPkg/ShellCommandLib: add ShellSortFileList()
Date: Wed, 13 Jan 2021 09:54:49 +0100 [thread overview]
Message-ID: <20210113085453.10168-7-lersek@redhat.com> (raw)
In-Reply-To: <20210113085453.10168-1-lersek@redhat.com>
Introduce the ShellSortFileList() function, for sorting an
EFI_SHELL_FILE_INFO list, by FileName or by FullName.
Duplicates can be kept in the same list, or separated out to a new list.
In either case, the relative order between duplicates does not change (the
sorting is stable).
For the sorting, use OrderedCollectionLib rather than SortLib:
- The PerformQuickSort() function from the latter has quadratic worst-case
time complexity, plus it is implemented recursively (see
"MdeModulePkg/Library/UefiSortLib/UefiSortLib.c"). It can also not
return an error on memory allocation failure.
- In comparison, the Red-Black Tree instance of OrderedCollectionLib sorts
in O(n*log(n)) worst-case time, contains no recursion with the default
PcdValidateOrderedCollection=FALSE setting, and the OrderedCollectionLib
class APIs return errors appropriately.
The OrderedCollectionLib APIs do not permit duplicates natively, but by
using lists as collection entries, stable sorting of duplicates can be
achieved.
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3151
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Zhichao Gao <zhichao.gao@intel.com>
---
Notes:
v2:
- no changes
- pick up Zhichao's R-b
ShellPkg/ShellPkg.dsc | 1 +
ShellPkg/Include/Library/ShellCommandLib.h | 81 +++++
ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.inf | 1 +
ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.h | 19 ++
ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c | 312 ++++++++++++++++++++
5 files changed, 414 insertions(+)
diff --git a/ShellPkg/ShellPkg.dsc b/ShellPkg/ShellPkg.dsc
index c42bc9464a0f..a8b6de334284 100644
--- a/ShellPkg/ShellPkg.dsc
+++ b/ShellPkg/ShellPkg.dsc
@@ -47,6 +47,7 @@ [LibraryClasses.common]
ShellCommandLib|ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.inf
ShellCEntryLib|ShellPkg/Library/UefiShellCEntryLib/UefiShellCEntryLib.inf
HandleParsingLib|ShellPkg/Library/UefiHandleParsingLib/UefiHandleParsingLib.inf
+ OrderedCollectionLib|MdePkg/Library/BaseOrderedCollectionRedBlackTreeLib/BaseOrderedCollectionRedBlackTreeLib.inf
PeCoffGetEntryPointLib|MdePkg/Library/BasePeCoffGetEntryPointLib/BasePeCoffGetEntryPointLib.inf
BcfgCommandLib|ShellPkg/Library/UefiShellBcfgCommandLib/UefiShellBcfgCommandLib.inf
diff --git a/ShellPkg/Include/Library/ShellCommandLib.h b/ShellPkg/Include/Library/ShellCommandLib.h
index 63fcac82a2de..bc1afed5e7f5 100644
--- a/ShellPkg/Include/Library/ShellCommandLib.h
+++ b/ShellPkg/Include/Library/ShellCommandLib.h
@@ -714,4 +714,85 @@ CatSDumpHex (
IN UINTN DataSize,
IN VOID *UserData
);
+
+//
+// Determines the ordering operation for ShellSortFileList().
+//
+typedef enum {
+ //
+ // Sort the EFI_SHELL_FILE_INFO objects by the FileName field, in increasing
+ // order, using gUnicodeCollation->StriColl().
+ //
+ ShellSortFileListByFileName,
+ //
+ // Sort the EFI_SHELL_FILE_INFO objects by the FullName field, in increasing
+ // order, using gUnicodeCollation->StriColl().
+ //
+ ShellSortFileListByFullName,
+ ShellSortFileListMax
+} SHELL_SORT_FILE_LIST;
+
+/**
+ Sort an EFI_SHELL_FILE_INFO list, optionally moving duplicates to a separate
+ list.
+
+ @param[in,out] FileList The list of EFI_SHELL_FILE_INFO objects to sort.
+
+ If FileList is NULL on input, then FileList is
+ considered an empty, hence already sorted, list.
+
+ Otherwise, if (*FileList) is NULL on input, then
+ EFI_INVALID_PARAMETER is returned.
+
+ Otherwise, the caller is responsible for having
+ initialized (*FileList)->Link with
+ InitializeListHead(). No other fields in the
+ (**FileList) head element are accessed by this
+ function.
+
+ On output, (*FileList) is sorted according to Order.
+ If Duplicates is NULL on input, then duplicate
+ elements are preserved, sorted stably, on
+ (*FileList). If Duplicates is not NULL on input,
+ then duplicates are moved (stably sorted) to the
+ new, dynamically allocated (*Duplicates) list.
+
+ @param[out] Duplicates If Duplicates is NULL on input, (*FileList) will be
+ a monotonically ordered list on output, with
+ duplicates stably sorted.
+
+ If Duplicates is not NULL on input, (*FileList) will
+ be a strictly monotonically oredered list on output,
+ with duplicates separated (stably sorted) to
+ (*Duplicates). All fields except Link will be
+ zero-initialized in the (**Duplicates) head element.
+ If no duplicates exist, then (*Duplicates) is set to
+ NULL on output.
+
+ @param[in] Order Determines the comparison operation between
+ EFI_SHELL_FILE_INFO objects.
+
+ @retval EFI_INVALID_PARAMETER (UINTN)Order is greater than or equal to
+ (UINTN)ShellSortFileListMax. Neither the
+ (*FileList) nor the (*Duplicates) list has
+ been modified.
+
+ @retval EFI_INVALID_PARAMETER (*FileList) was NULL on input. Neither the
+ (*FileList) nor the (*Duplicates) list has
+ been modified.
+
+ @retval EFI_OUT_OF_RESOURCES Memory allocation failed. Neither the
+ (*FileList) nor the (*Duplicates) list has
+ been modified.
+
+ @retval EFI_SUCCESS Sorting successful, including the case when
+ FileList is NULL on input.
+**/
+EFI_STATUS
+EFIAPI
+ShellSortFileList (
+ IN OUT EFI_SHELL_FILE_INFO **FileList,
+ OUT EFI_SHELL_FILE_INFO **Duplicates OPTIONAL,
+ IN SHELL_SORT_FILE_LIST Order
+ );
#endif //_SHELL_COMMAND_LIB_
diff --git a/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.inf b/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.inf
index a1b5601c96b6..08ca7cb78842 100644
--- a/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.inf
+++ b/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.inf
@@ -42,6 +42,7 @@ [LibraryClasses]
ShellLib
HiiLib
HandleParsingLib
+ OrderedCollectionLib
[Protocols]
gEfiUnicodeCollation2ProtocolGuid ## CONSUMES
diff --git a/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.h b/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.h
index 8ecc2f6bf5a2..0ca291e4f9bf 100644
--- a/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.h
+++ b/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.h
@@ -39,6 +39,7 @@
#include <Library/HiiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
+#include <Library/OrderedCollectionLib.h>
typedef struct{
LIST_ENTRY Link;
@@ -60,6 +61,24 @@ typedef struct {
CHAR16 *Path;
} SHELL_COMMAND_FILE_HANDLE;
+//
+// Collects multiple EFI_SHELL_FILE_INFO objects that share the same name.
+//
+typedef struct {
+ //
+ // A string that compares equal to either the FileName or the FullName fields
+ // of all EFI_SHELL_FILE_INFO objects on SameNameList, according to
+ // gUnicodeCollation->StriColl(). The string is not dynamically allocated;
+ // instead, it *aliases* the FileName or FullName field of the
+ // EFI_SHELL_FILE_INFO object that was first encountered with this name.
+ //
+ CONST CHAR16 *Alias;
+ //
+ // A list of EFI_SHELL_FILE_INFO objects whose FileName or FullName fields
+ // compare equal to Alias, according to gUnicodeCollation->StriColl().
+ //
+ LIST_ENTRY SameNameList;
+} SHELL_SORT_UNIQUE_NAME;
#endif //_UEFI_COMMAND_LIB_INTERNAL_HEADER_
diff --git a/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c b/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c
index 345808a1eac6..b06d22592d33 100644
--- a/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c
+++ b/ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c
@@ -1909,3 +1909,315 @@ CatSDumpHex (
return RetVal;
}
+
+/**
+ ORDERED_COLLECTION_USER_COMPARE function for SHELL_SORT_UNIQUE_NAME objects.
+
+ @param[in] Unique1AsVoid The first SHELL_SORT_UNIQUE_NAME object (Unique1),
+ passed in as a pointer-to-VOID.
+
+ @param[in] Unique2AsVoid The second SHELL_SORT_UNIQUE_NAME object (Unique2),
+ passed in as a pointer-to-VOID.
+
+ @retval <0 If Unique1 compares less than Unique2.
+
+ @retval 0 If Unique1 compares equal to Unique2.
+
+ @retval >0 If Unique1 compares greater than Unique2.
+**/
+STATIC
+INTN
+EFIAPI
+UniqueNameCompare (
+ IN CONST VOID *Unique1AsVoid,
+ IN CONST VOID *Unique2AsVoid
+ )
+{
+ CONST SHELL_SORT_UNIQUE_NAME *Unique1;
+ CONST SHELL_SORT_UNIQUE_NAME *Unique2;
+
+ Unique1 = Unique1AsVoid;
+ Unique2 = Unique2AsVoid;
+
+ //
+ // We need to cast away CONST for EFI_UNICODE_COLLATION_STRICOLL.
+ //
+ return gUnicodeCollation->StriColl (
+ gUnicodeCollation,
+ (CHAR16 *)Unique1->Alias,
+ (CHAR16 *)Unique2->Alias
+ );
+}
+
+/**
+ ORDERED_COLLECTION_KEY_COMPARE function for SHELL_SORT_UNIQUE_NAME objects.
+
+ @param[in] UniqueAliasAsVoid The CHAR16 string UniqueAlias, passed in as a
+ pointer-to-VOID.
+
+ @param[in] UniqueAsVoid The SHELL_SORT_UNIQUE_NAME object (Unique),
+ passed in as a pointer-to-VOID.
+
+ @retval <0 If UniqueAlias compares less than Unique->Alias.
+
+ @retval 0 If UniqueAlias compares equal to Unique->Alias.
+
+ @retval >0 If UniqueAlias compares greater than Unique->Alias.
+**/
+STATIC
+INTN
+EFIAPI
+UniqueNameAliasCompare (
+ IN CONST VOID *UniqueAliasAsVoid,
+ IN CONST VOID *UniqueAsVoid
+ )
+{
+ CONST CHAR16 *UniqueAlias;
+ CONST SHELL_SORT_UNIQUE_NAME *Unique;
+
+ UniqueAlias = UniqueAliasAsVoid;
+ Unique = UniqueAsVoid;
+
+ //
+ // We need to cast away CONST for EFI_UNICODE_COLLATION_STRICOLL.
+ //
+ return gUnicodeCollation->StriColl (
+ gUnicodeCollation,
+ (CHAR16 *)UniqueAlias,
+ (CHAR16 *)Unique->Alias
+ );
+}
+
+/**
+ Sort an EFI_SHELL_FILE_INFO list, optionally moving duplicates to a separate
+ list.
+
+ @param[in,out] FileList The list of EFI_SHELL_FILE_INFO objects to sort.
+
+ If FileList is NULL on input, then FileList is
+ considered an empty, hence already sorted, list.
+
+ Otherwise, if (*FileList) is NULL on input, then
+ EFI_INVALID_PARAMETER is returned.
+
+ Otherwise, the caller is responsible for having
+ initialized (*FileList)->Link with
+ InitializeListHead(). No other fields in the
+ (**FileList) head element are accessed by this
+ function.
+
+ On output, (*FileList) is sorted according to Order.
+ If Duplicates is NULL on input, then duplicate
+ elements are preserved, sorted stably, on
+ (*FileList). If Duplicates is not NULL on input,
+ then duplicates are moved (stably sorted) to the
+ new, dynamically allocated (*Duplicates) list.
+
+ @param[out] Duplicates If Duplicates is NULL on input, (*FileList) will be
+ a monotonically ordered list on output, with
+ duplicates stably sorted.
+
+ If Duplicates is not NULL on input, (*FileList) will
+ be a strictly monotonically oredered list on output,
+ with duplicates separated (stably sorted) to
+ (*Duplicates). All fields except Link will be
+ zero-initialized in the (**Duplicates) head element.
+ If no duplicates exist, then (*Duplicates) is set to
+ NULL on output.
+
+ @param[in] Order Determines the comparison operation between
+ EFI_SHELL_FILE_INFO objects.
+
+ @retval EFI_INVALID_PARAMETER (UINTN)Order is greater than or equal to
+ (UINTN)ShellSortFileListMax. Neither the
+ (*FileList) nor the (*Duplicates) list has
+ been modified.
+
+ @retval EFI_INVALID_PARAMETER (*FileList) was NULL on input. Neither the
+ (*FileList) nor the (*Duplicates) list has
+ been modified.
+
+ @retval EFI_OUT_OF_RESOURCES Memory allocation failed. Neither the
+ (*FileList) nor the (*Duplicates) list has
+ been modified.
+
+ @retval EFI_SUCCESS Sorting successful, including the case when
+ FileList is NULL on input.
+**/
+EFI_STATUS
+EFIAPI
+ShellSortFileList (
+ IN OUT EFI_SHELL_FILE_INFO **FileList,
+ OUT EFI_SHELL_FILE_INFO **Duplicates OPTIONAL,
+ IN SHELL_SORT_FILE_LIST Order
+ )
+{
+ LIST_ENTRY *FilesHead;
+ ORDERED_COLLECTION *Sort;
+ LIST_ENTRY *FileEntry;
+ EFI_SHELL_FILE_INFO *FileInfo;
+ SHELL_SORT_UNIQUE_NAME *Unique;
+ EFI_STATUS Status;
+ EFI_SHELL_FILE_INFO *Dupes;
+ LIST_ENTRY *NextFileEntry;
+ CONST CHAR16 *Alias;
+ ORDERED_COLLECTION_ENTRY *SortEntry;
+ LIST_ENTRY *TargetFileList;
+ ORDERED_COLLECTION_ENTRY *NextSortEntry;
+ VOID *UniqueAsVoid;
+
+ if ((UINTN)Order >= (UINTN)ShellSortFileListMax) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (FileList == NULL) {
+ //
+ // FileList is considered empty, hence already sorted, with no duplicates.
+ //
+ if (Duplicates != NULL) {
+ *Duplicates = NULL;
+ }
+ return EFI_SUCCESS;
+ }
+
+ if (*FileList == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+ FilesHead = &(*FileList)->Link;
+
+ //
+ // Collect all the unique names.
+ //
+ Sort = OrderedCollectionInit (UniqueNameCompare, UniqueNameAliasCompare);
+ if (Sort == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ BASE_LIST_FOR_EACH (FileEntry, FilesHead) {
+ FileInfo = (EFI_SHELL_FILE_INFO *)FileEntry;
+
+ //
+ // Try to record the name of this file as a unique name.
+ //
+ Unique = AllocatePool (sizeof (*Unique));
+ if (Unique == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto UninitSort;
+ }
+ Unique->Alias = ((Order == ShellSortFileListByFileName) ?
+ FileInfo->FileName :
+ FileInfo->FullName);
+ InitializeListHead (&Unique->SameNameList);
+
+ Status = OrderedCollectionInsert (Sort, NULL, Unique);
+ if (EFI_ERROR (Status)) {
+ //
+ // Only two errors are possible: memory allocation failed, or this name
+ // has been encountered before. In either case, the
+ // SHELL_SORT_UNIQUE_NAME object being constructed has to be released.
+ //
+ FreePool (Unique);
+ //
+ // Memory allocation failure is fatal, while having seen the same name
+ // before is normal.
+ //
+ if (Status == EFI_OUT_OF_RESOURCES) {
+ goto UninitSort;
+ }
+ ASSERT (Status == EFI_ALREADY_STARTED);
+ }
+ }
+
+ //
+ // If separation of duplicates has been requested, allocate the list for
+ // them.
+ //
+ if (Duplicates != NULL) {
+ Dupes = AllocateZeroPool (sizeof (*Dupes));
+ if (Dupes == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto UninitSort;
+ }
+ InitializeListHead (&Dupes->Link);
+ }
+
+ //
+ // No memory allocation beyond this point; thus, no chance to fail. We can
+ // now migrate the EFI_SHELL_FILE_INFO objects from (*FileList) to Sort.
+ //
+ BASE_LIST_FOR_EACH_SAFE (FileEntry, NextFileEntry, FilesHead) {
+ FileInfo = (EFI_SHELL_FILE_INFO *)FileEntry;
+ //
+ // Look up the SHELL_SORT_UNIQUE_NAME that matches FileInfo's name.
+ //
+ Alias = ((Order == ShellSortFileListByFileName) ?
+ FileInfo->FileName :
+ FileInfo->FullName);
+ SortEntry = OrderedCollectionFind (Sort, Alias);
+ ASSERT (SortEntry != NULL);
+ Unique = OrderedCollectionUserStruct (SortEntry);
+ //
+ // Move FileInfo from (*FileList) to the end of the list of files whose
+ // names all compare identical to FileInfo's name.
+ //
+ RemoveEntryList (&FileInfo->Link);
+ InsertTailList (&Unique->SameNameList, &FileInfo->Link);
+ }
+
+ //
+ // All EFI_SHELL_FILE_INFO objects originally in (*FileList) have been
+ // distributed to Sort. Now migrate them back to (*FileList), advancing in
+ // unique name order.
+ //
+ for (SortEntry = OrderedCollectionMin (Sort);
+ SortEntry != NULL;
+ SortEntry = OrderedCollectionNext (SortEntry)) {
+ Unique = OrderedCollectionUserStruct (SortEntry);
+ //
+ // The first FileInfo encountered for each unique name goes back on
+ // (*FileList) unconditionally. Further FileInfo instances for the same
+ // unique name -- that is, duplicates -- are either returned to (*FileList)
+ // or separated, dependent on the caller's request.
+ //
+ TargetFileList = FilesHead;
+ BASE_LIST_FOR_EACH_SAFE (FileEntry, NextFileEntry, &Unique->SameNameList) {
+ RemoveEntryList (FileEntry);
+ InsertTailList (TargetFileList, FileEntry);
+ if (Duplicates != NULL) {
+ TargetFileList = &Dupes->Link;
+ }
+ }
+ }
+
+ //
+ // We're done. If separation of duplicates has been requested, output the
+ // list of duplicates -- and free that list at once, if it's empty (i.e., if
+ // no duplicates have been found).
+ //
+ if (Duplicates != NULL) {
+ if (IsListEmpty (&Dupes->Link)) {
+ FreePool (Dupes);
+ *Duplicates = NULL;
+ } else {
+ *Duplicates = Dupes;
+ }
+ }
+ Status = EFI_SUCCESS;
+
+ //
+ // Fall through.
+ //
+UninitSort:
+ for (SortEntry = OrderedCollectionMin (Sort);
+ SortEntry != NULL;
+ SortEntry = NextSortEntry) {
+ NextSortEntry = OrderedCollectionNext (SortEntry);
+ OrderedCollectionDelete (Sort, SortEntry, &UniqueAsVoid);
+ Unique = UniqueAsVoid;
+ ASSERT (IsListEmpty (&Unique->SameNameList));
+ FreePool (Unique);
+ }
+ OrderedCollectionUninit (Sort);
+
+ return Status;
+}
--
2.19.1.3.g30247aa5d201
next prev parent reply other threads:[~2021-01-13 8:55 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-13 8:54 [PATCH v2 00/10] multiple packages: shell usability improvements Laszlo Ersek
2021-01-13 8:54 ` [PATCH v2 01/10] ShellPkg/Comp: add file buffering Laszlo Ersek
2021-01-13 18:42 ` Philippe Mathieu-Daudé
2021-01-13 8:54 ` [PATCH v2 02/10] OvmfPkg: raise PcdShellFileOperationSize to 128KB Laszlo Ersek
2021-01-15 9:34 ` Philippe Mathieu-Daudé
2021-01-15 10:09 ` Laszlo Ersek
2021-01-15 15:58 ` Philippe Mathieu-Daudé
2021-01-15 18:22 ` Laszlo Ersek
2021-01-13 8:54 ` [PATCH v2 03/10] ArmVirtPkg: " Laszlo Ersek
2021-01-15 15:59 ` Philippe Mathieu-Daudé
2021-01-15 19:03 ` [edk2-devel] " Laszlo Ersek
2021-01-13 8:54 ` [PATCH v2 04/10] EmulatorPkg: add OrderedCollectionLib class resolution Laszlo Ersek
2021-01-13 13:20 ` Philippe Mathieu-Daudé
2021-01-18 16:48 ` [edk2-devel] " Laszlo Ersek
2021-01-19 7:55 ` 回复: " gaoliming
2021-01-13 8:54 ` [PATCH v2 05/10] UefiPayloadPkg: " Laszlo Ersek
2021-01-13 13:20 ` Philippe Mathieu-Daudé
2021-01-18 16:48 ` [edk2-devel] " Laszlo Ersek
2021-01-19 4:29 ` Guo Dong
2021-01-13 8:54 ` Laszlo Ersek [this message]
2021-01-13 13:19 ` [PATCH v2 06/10] ShellPkg/ShellCommandLib: add ShellSortFileList() Philippe Mathieu-Daudé
2021-01-13 8:54 ` [PATCH v2 07/10] ShellPkg/Ls: sort output by FileName in non-SFO mode Laszlo Ersek
2021-01-13 13:15 ` Philippe Mathieu-Daudé
2021-01-13 8:54 ` [PATCH v2 08/10] ShellPkg/ShellProtocol: sort files by FullName in RemoveDupInFileList() Laszlo Ersek
2021-01-13 13:14 ` Philippe Mathieu-Daudé
2021-01-14 14:19 ` Laszlo Ersek
2021-01-13 8:54 ` [PATCH v2 09/10] OvmfPkg: disable list length checks in NOOPT and DEBUG builds Laszlo Ersek
2021-01-15 9:30 ` Philippe Mathieu-Daudé
2021-01-13 8:54 ` [PATCH v2 10/10] ArmVirtPkg: " Laszlo Ersek
2021-01-15 9:31 ` Philippe Mathieu-Daudé
2021-01-19 18:39 ` [edk2-devel] [PATCH v2 00/10] multiple packages: shell usability improvements Laszlo Ersek
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