[AMD Official Use Only - General]
I am not the reviewer or maintainer of DynamicTablePkg, however this patch
looks good.
Abner
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Sami
> Mujawar via groups.io
> Sent: Monday, September 12, 2022 10:19 PM
> To: devel@edk2.groups.io
> Cc: Sami Mujawar <sami.muja...@arm.com>; alexei.fedo...@arm.com;
> pierre.gond...@arm.com; gmahade...@nvidia.com; jbra...@nvidia.com;
> ashishsin...@nvidia.com; nrami...@nvidia.com; wwat...@nvidia.com;
> samer.el-haj-mahm...@arm.com; akanksha.ja...@arm.com;
> matteo.carl...@arm.com; ben.adder...@arm.com; n...@arm.com
> Subject: [edk2-devel] [PATCH v1 1/1] DynamicTablesPkg: Add SMBIOS String
> table helper library
>
> [CAUTION: External Email]
>
> The Section 6.1.3, SMBIOS specification version 3.6.0 describes the handling
> of test strings in SMBIOS tables.
>
> Test strings are added at the end of the formatted portion of the SMBIOS
> structure and are referenced by index in the SMBIOS structure.
>
> Therefore, introduce a SmbiosStringTableLib to simplify the publishing of the
> string set.
>
> SmbiosStringTableLib introduces a concept of string table which records the
> references to the SMBIOS strings as they are added and returns an string
> reference which is then assigned to the string field in the formatted portion
> of the SMBIOS structure. Once all strings are added, the library provides an
> interface to get the required size for the string set. This allows sufficient
> memory to be allocated for the SMBIOS table.
> The library also provides an interface to publish the string set in accordance
> with the SMBIOS specification.
>
> Example:
> EFI_STATUS
> BuildSmbiosType17Table () {
> STRING_TABLE StrTable;
> UINT8 DevLocatorRef;
> UINT8 BankLocatorRef;
> SMBIOS_TABLE_TYPE17 *SmbiosRecord;
> CHAR8 *StringSet;
> ...
>
> // Initialize string table for 7 strings
> StringTableInitialize (&StrTable, 7);
>
> StringTableAddString (&StrTable, "SIMM 3", &DevLocatorRef);
> StringTableAddString (&StrTable, "Bank 0", &BankLocatorRef);
> ...
>
> SmbiosRecord = AllocateZeroPool (
> sizeof (SMBIOS_TABLE_TYPE17) +
> StringTableGetStringSetSize (&StrTable)
> );
> ...
> SmbiosRecord->DeviceLocator = DevLocatorRef;
> SmbiosRecord->BankLocator = BankLocatorRef;
> ...
> // get the string set area
> StringSet = (CHAR8*)(SmbiosRecord + 1);
>
> // publish the string set
> StringTablePublishStringSet (
> &StrTable,
> StringSet,
> StringTableGetStringSetSize (&StrTable)
> );
>
> // free string table
> StringTableFree (&StrTable);
>
> return EFI_SUCCESS;
> }
>
> Signed-off-by: Sami Mujawar <sami.muja...@arm.com>
> Cc: Alexei Fedorov <alexei.fedo...@arm.com>
> Cc: Pierre Gondois <pierre.gond...@arm.com>
> Cc: Girish Mahadevan <gmahade...@nvidia.com>
> Cc: Jeff Brasen <jbra...@nvidia.com>
> Cc: Ashish Singhal <ashishsin...@nvidia.com>
> Cc: Nick Ramirez <nrami...@nvidia.com>
> Cc: William Watson <wwat...@nvidia.com>
> Cc: Samer El-Haj-Mahmoud <samer.el-haj-mahm...@arm.com>
> ---
> The changes can be seen at:
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgith
> ub.com%2Fsamimujawar%2Fedk2%2Ftree%2F2370_smbios_stringlib_v1&am
> p;data=05%7C01%7Cabner.chang%40amd.com%7C2f4f246601944c95e16c08d
> a94c9c7f6%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637985891
> 657718377%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIj
> oiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sd
> ata=LfZx8a24uMDMQPXHNCVJOAl8JaNmqaBZaTbJvxG1nMU%3D&rese
> rved=0
>
> DynamicTablesPkg/DynamicTables.dsc.inc
> | 3 +-
> DynamicTablesPkg/DynamicTablesPkg.dec
> | 5 +-
> DynamicTablesPkg/DynamicTablesPkg.dsc
> | 3 +-
> DynamicTablesPkg/Include/Library/SmbiosStringTableLib.h
> | 119
> ++++++++++
>
> DynamicTablesPkg/Library/Common/SmbiosStringTableLib/SmbiosStringTabl
> eLib.c | 227 ++++++++++++++++++++
>
> DynamicTablesPkg/Library/Common/SmbiosStringTableLib/SmbiosStringTabl
> eLib.inf | 25 +++
> 6 files changed, 379 insertions(+), 3 deletions(-)
>
> diff --git a/DynamicTablesPkg/DynamicTables.dsc.inc
> b/DynamicTablesPkg/DynamicTables.dsc.inc
> index
> 3d4fa0c4c4b67d6770aee8705c80cc18d20c823a..d35acc1788f2ddc5e2b5fc3e4b
> edfd48251f7ec8 100644
> --- a/DynamicTablesPkg/DynamicTables.dsc.inc
> +++ b/DynamicTablesPkg/DynamicTables.dsc.inc
> @@ -1,7 +1,7 @@
> ## @file
> # Dsc include file for Dynamic Tables Framework.
> #
> -# Copyright (c) 2017 - 2021, Arm Limited. All rights reserved.<BR>
> +# Copyright (c) 2017 - 2022, Arm Limited. All rights reserved.<BR>
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent # @@ -18,6 +18,7 @@
> [LibraryClasses.common]
>
> SsdtPcieSupportLib|DynamicTablesPkg/Library/Common/SsdtPcieSupportLib
> /SsdtPcieSupportLib.inf
>
> SsdtSerialPortFixupLib|DynamicTablesPkg/Library/Common/SsdtSerialPortFi
> xupLib/SsdtSerialPortFixupLib.inf
>
> TableHelperLib|DynamicTablesPkg/Library/Common/TableHelperLib/TableH
> elperLib.inf
> +
> +
> SmbiosStringTableLib|DynamicTablesPkg/Library/Common/SmbiosStringTabl
> e
> + Lib/SmbiosStringTableLib.inf
>
> [Components.common]
> #
> diff --git a/DynamicTablesPkg/DynamicTablesPkg.dec
> b/DynamicTablesPkg/DynamicTablesPkg.dec
> index
> cc34c2bdd6ff9b5ca508961b3d0fe85ffbb73c12..2a79cfd4edebbdff05bee66fa0
> 1a17d68252e8a7 100644
> --- a/DynamicTablesPkg/DynamicTablesPkg.dec
> +++ b/DynamicTablesPkg/DynamicTablesPkg.dec
> @@ -1,7 +1,7 @@
> ## @file
> # dec file for Dynamic Tables Framework.
> #
> -# Copyright (c) 2017 - 2021, Arm Limited. All rights reserved.<BR>
> +# Copyright (c) 2017 - 2022, Arm Limited. All rights reserved.<BR>
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent # @@ -39,6 +39,9 @@
> [LibraryClasses]
> ## @libraryclass Defines a set of helper methods.
> TableHelperLib|Include/Library/TableHelperLib.h
>
> + ## @libraryclass Defines a set of SMBIOS string helper methods.
> + SmbiosStringTableLib|Include/Library/SmbiosStringTableLib.h
> +
> [Protocols]
> # Configuration Manager Protocol GUID
> gEdkiiConfigurationManagerProtocolGuid = { 0xd85a4835, 0x5a82, 0x4894,
> { 0xac, 0x2, 0x70, 0x6f, 0x43, 0xd5, 0x97, 0x8e } } diff --git
> a/DynamicTablesPkg/DynamicTablesPkg.dsc
> b/DynamicTablesPkg/DynamicTablesPkg.dsc
> index
> 07cc837552f587fe5bf9031e0061b0234e8698d4..bd5084a9008f040acdd16200ae
> 8cdb23455ac101 100644
> --- a/DynamicTablesPkg/DynamicTablesPkg.dsc
> +++ b/DynamicTablesPkg/DynamicTablesPkg.dsc
> @@ -2,7 +2,7 @@
> # Dsc file for Dynamic Tables Framework.
> #
> # Copyright (c) 2019, Linaro Limited. All rights reserved.<BR> -#
> Copyright (c)
> 2019 - 2021, Arm Limited. All rights reserved.<BR>
> +# Copyright (c) 2019 - 2022, Arm Limited. All rights reserved.<BR>
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent # @@ -46,6 +46,7 @@
> [Components.common]
> DynamicTablesPkg/Library/Common/TableHelperLib/TableHelperLib.inf
> DynamicTablesPkg/Library/FdtHwInfoParserLib/FdtHwInfoParserLib.inf
>
> DynamicTablesPkg/Library/Common/DynamicPlatRepoLib/DynamicPlatRepo
> Lib.inf
> +
> +
> DynamicTablesPkg/Library/Common/SmbiosStringTableLib/SmbiosStringTabl
> e
> + Lib.inf
>
> [BuildOptions]
> *_*_*_CC_FLAGS = -D DISABLE_NEW_DEPRECATED_INTERFACES diff --git
> a/DynamicTablesPkg/Include/Library/SmbiosStringTableLib.h
> b/DynamicTablesPkg/Include/Library/SmbiosStringTableLib.h
> new file mode 100644
> index
> 0000000000000000000000000000000000000000..246d4d30ddf901640ea720c10
> 8e2971552ec6c96
> --- /dev/null
> +++ b/DynamicTablesPkg/Include/Library/SmbiosStringTableLib.h
> @@ -0,0 +1,119 @@
> +/** @file
> + SMBIOS String Table Helper library.
> +
> + Copyright (c) 2022, Arm Limited. All rights reserved.<BR>
> + SPDX-License-Identifier: BSD-2-Clause-Patent **/
> +
> +#ifndef SMBIOS_STRING_TABLE_H_
> +#define SMBIOS_STRING_TABLE_H_
> +
> +/** A structure representing a string in the string table.
> +*/
> +typedef struct StringElement {
> + /// Length of the string (does not include the NULL termination)
> + UINTN StringLen;
> +
> + /// Reference to the string
> + CONST CHAR8 *String;
> +} STRING_ELEMENT;
> +
> +/** A structure representing a string table.
> +*/
> +typedef struct StringTable {
> + /// Count of strings in the table
> + UINT8 StrCount;
> +
> + /// Total length of all strings in the table (does not include //
> + the NULL termination for each string)
> + UINTN TotalStrLen;
> +
> + /// Maximum string count
> + UINT8 MaxStringElements;
> +
> + /// Pointer to the string table elements
> + STRING_ELEMENT *Elements;
> +} STRING_TABLE;
> +
> +/** Add a string to the string table
> +
> + @param [IN] StrTable Pointer to the string table
> + @param [IN] Str Pointer to the string
> + @param [OUT] StrRef Optional pointer to retrieve the string field
> + reference of the string in the string table
> +
> + @return EFI_SUCCESS Success
> + @return EFI_INVALID_PARAMETER Invalid string table pointer
> + @return EFI_BUFFER_TOO_SMALL Insufficient space to add string
> +**/
> +EFI_STATUS
> +EFIAPI
> +StringTableAddString (
> + IN STRING_TABLE *CONST StrTable,
> + IN CONST CHAR8 *Str,
> + OUT UINT8 *StrRef OPTIONAL
> + );
> +
> +/** Returns the total size required to publish the strings to the SMBIOS
> + string area.
> +
> + @param [IN] StrTable Pointer to the string table
> +
> + @return Total size required to publish the strings in the SMBIOS string
> area.
> +**/
> +UINTN
> +EFIAPI
> +StringTableGetStringSetSize (
> + IN STRING_TABLE *CONST StrTable
> + );
> +
> +/** Iterate through the string table and publish the strings in the SMBIOS
> + string area.
> +
> + @param [IN] StrTable Pointer to the string table
> + @param [IN] SmbiosStringAreaStart Start address of the SMBIOS string
> area.
> + @param [IN] SmbiosStringAreaSize Size of the SMBIOS string area.
> +
> + @return EFI_SUCCESS Success
> + @return EFI_INVALID_PARAMETER Invalid string table pointer
> + @return EFI_BUFFER_TOO_SMALL Insufficient space to publish strings
> +**/
> +EFI_STATUS
> +EFIAPI
> +StringTablePublishStringSet (
> + IN STRING_TABLE *CONST StrTable,
> + IN CHAR8 *CONST SmbiosStringAreaStart,
> + IN CONST UINTN SmbiosStringAreaSize
> + );
> +
> +/** Initialise the string table and allocate memory for the string elements.
> +
> + @param [IN] StrTable Pointer to the string table
> + @param [IN] MaxStringElements Maximum number of strings that the
> string
> + table can hold.
> +
> + @return EFI_SUCCESS Success
> + @return EFI_INVALID_PARAMETER Invalid string table pointer
> + @return EFI_OUT_OF_RESOURCES Failed to allocate memory for string
> elements
> +**/
> +EFI_STATUS
> +EFIAPI
> +StringTableInitialize (
> + IN STRING_TABLE *CONST StrTable,
> + IN UINTN MaxStringElements
> + );
> +
> +/** Free memory allocated for the string elements in the string table.
> +
> + @param [IN] StrTable Pointer to the string table
> +
> + @return EFI_SUCCESS Success
> + @return EFI_INVALID_PARAMETER Invalid string table pointer or string
> +elements **/ EFI_STATUS EFIAPI StringTableFree (
> + IN STRING_TABLE *CONST StrTable
> + );
> +
> +#endif // SMBIOS_STRING_TABLE_H_
> diff --git
> a/DynamicTablesPkg/Library/Common/SmbiosStringTableLib/SmbiosStringTa
> bleLib.c
> b/DynamicTablesPkg/Library/Common/SmbiosStringTableLib/SmbiosStringTa
> bleLib.c
> new file mode 100644
> index
> 0000000000000000000000000000000000000000..bd186f27fe1613cf819b6600e6
> 2960c003a796d6
> --- /dev/null
> +++
> b/DynamicTablesPkg/Library/Common/SmbiosStringTableLib/SmbiosStringT
> +++ ableLib.c
> @@ -0,0 +1,227 @@
> +/** @file
> + SMBIOS String Table Helper
> +
> + Copyright (c) 2022, Arm Limited. All rights reserved.<BR>
> +
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> + @par Reference(s):
> + - DSP0134 - SMBIOS Specification Version 3.6.0, 2022-06-17 **/
> +
> +#include <Library/BaseLib.h>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/MemoryAllocationLib.h> #include
> +<Library/SmbiosStringTableLib.h>
> +
> +/** Add a string to the string table
> +
> + @param [IN] StrTable Pointer to the string table
> + @param [IN] Str Pointer to the string
> + @param [OUT] StrRef Optional pointer to retrieve the string field
> + reference of the string in the string table
> +
> + @return EFI_SUCCESS Success
> + @return EFI_INVALID_PARAMETER Invalid string table pointer
> + @return EFI_BUFFER_TOO_SMALL Insufficient space to add string
> +**/
> +EFI_STATUS
> +EFIAPI
> +StringTableAddString (
> + IN STRING_TABLE *CONST StrTable,
> + IN CONST CHAR8 *Str,
> + OUT UINT8 *StrRef OPTIONAL
> + )
> +{
> + UINTN StrLength;
> + STRING_ELEMENT *StrElement;
> +
> + if ((StrTable == NULL) || (Str == NULL)) {
> + return EFI_INVALID_PARAMETER;
> + }
> +
> + if (StrTable->StrCount >= StrTable->MaxStringElements) {
> + return EFI_BUFFER_TOO_SMALL;
> + }
> +
> + StrLength = AsciiStrLen (Str);
> + if (StrLength == 0) {
> + return EFI_INVALID_PARAMETER;
> + }
> +
> + // Update the string element
> + StrElement = &StrTable->Elements[StrTable->StrCount];
> + StrElement->StringLen = StrLength;
> + StrElement->String = Str;
> +
> + // Update String table information
> + StrTable->TotalStrLen += StrLength;
> + StrTable->StrCount++;
> +
> + // Return the index of the string in the string table if requested
> + if (StrRef != NULL) {
> + // Note: SMBIOS string field references start at 1. So, return the
> + // StrCount as the string refrence after it is updated.
> + *StrRef = StrTable->StrCount;
> + }
> +
> + return EFI_SUCCESS;
> +}
> +
> +/** Returns the total size required to publish the strings to the SMBIOS
> + string area.
> +
> + @param [IN] StrTable Pointer to the string table
> +
> + @return Total size required to publish the strings in the SMBIOS string
> area.
> +**/
> +UINTN
> +EFIAPI
> +StringTableGetStringSetSize (
> + IN STRING_TABLE *CONST StrTable
> + )
> +{
> + if (StrTable == NULL) {
> + ASSERT (0);
> + return 0;
> + }
> +
> + // See Section 6.1.3 Text strings, SMBIOS Specification Version 3.6.0
> + // - If the formatted portion of the structure contains string-reference
> + // fields and all the string fields are set to 0 (no string references),
> + // the formatted section of the structure is followed by two null (00h)
> + // BYTES.
> + // - Each string is terminated with a null (00h) BYTE // - and the
> + set of strings is terminated with an additional null (00h) BYTE.
> +
> + // Therefore, if string count = 0, return 2
> + // if string count > 0, the string set size =
> + // StrTable->TotalStrLen (total length of the strings in the string
> +table)
> + // + StrTable->StrCount (add string count to include '\0' for each
> +string)
> + // +1 (an additional '\0' is required at the end of the string set).
> + return (StrTable->StrCount == 0) ? 2 :
> + (StrTable->TotalStrLen + StrTable->StrCount + 1); }
> +
> +/** Iterate through the string table and publish the strings in the SMBIOS
> + string area.
> +
> + @param [IN] StrTable Pointer to the string table
> + @param [IN] SmbiosStringAreaStart Start address of the SMBIOS string
> area.
> + @param [IN] SmbiosStringAreaSize Size of the SMBIOS string area.
> +
> + @return EFI_SUCCESS Success
> + @return EFI_INVALID_PARAMETER Invalid string table pointer
> + @return EFI_BUFFER_TOO_SMALL Insufficient space to publish strings
> +**/
> +EFI_STATUS
> +EFIAPI
> +StringTablePublishStringSet (
> + IN STRING_TABLE *CONST StrTable,
> + IN CHAR8 *CONST SmbiosStringAreaStart,
> + IN CONST UINTN SmbiosStringAreaSize
> + )
> +{
> + UINT8 Index;
> + STRING_ELEMENT *StrElement;
> + CHAR8 *SmbiosString;
> + UINTN BytesRemaining;
> + UINTN BytesCopied;
> +
> + if ((StrTable == NULL) || (SmbiosStringAreaStart == NULL)) {
> + return EFI_INVALID_PARAMETER;
> + }
> +
> + if (SmbiosStringAreaSize < StringTableGetStringSetSize (StrTable)) {
> + return EFI_BUFFER_TOO_SMALL;
> + }
> +
> + SmbiosString = SmbiosStringAreaStart;
> + BytesRemaining = SmbiosStringAreaSize;
> +
> + if (StrTable->StrCount == 0) {
> + // See Section 6.1.3 Text strings, SMBIOS Specification Version 3.6.0
> + // If the formatted portion of the structure contains string-reference
> + // fields and all the string fields are set to 0 (no string references),
> + // the formatted section of the structure is followed by two null (00h)
> + // BYTES.
> + *SmbiosString++ = '\0';
> + } else {
> + for (Index = 0; Index < StrTable->StrCount; Index++) {
> + StrElement = &StrTable->Elements[Index];
> + AsciiStrCpyS (SmbiosString, BytesRemaining, StrElement->String);
> +
> + // See Section 6.1.3 Text strings, SMBIOS Specification Version 3.6.0
> + // - Each string is terminated with a null (00h) BYTE
> + // Bytes Copied = String length + 1 for the string NULL terminator.
> + BytesCopied = StrElement->StringLen + 1;
> + BytesRemaining -= BytesCopied;
> + SmbiosString += BytesCopied;
> + }
> + }
> +
> + // See Section 6.1.3 Text strings, SMBIOS Specification Version 3.6.0
> + // - the set of strings is terminated with an additional null (00h) BYTE.
> + *SmbiosString = '\0';
> + return EFI_SUCCESS;
> +}
> +
> +/** Initialise the string table and allocate memory for the string elements.
> +
> + @param [IN] StrTable Pointer to the string table
> + @param [IN] MaxStringElements Maximum number of strings that the
> string
> + table can hold.
> +
> + @return EFI_SUCCESS Success
> + @return EFI_INVALID_PARAMETER Invalid string table pointer
> + @return EFI_OUT_OF_RESOURCES Failed to allocate memory for string
> elements
> +**/
> +EFI_STATUS
> +EFIAPI
> +StringTableInitialize (
> + IN STRING_TABLE *CONST StrTable,
> + IN UINTN MaxStringElements
> + )
> +{
> + STRING_ELEMENT *Elements;
> +
> + if ((StrTable == NULL) || (MaxStringElements > MAX_UINT8)) {
> + return EFI_INVALID_PARAMETER;
> + }
> +
> + ZeroMem (StrTable, sizeof (STRING_TABLE));
> +
> + Elements = (STRING_ELEMENT *)AllocateZeroPool (
> + sizeof (STRING_ELEMENT) * MaxStringElements
> + );
> + if (Elements == NULL) {
> + return EFI_OUT_OF_RESOURCES;
> + }
> +
> + StrTable->Elements = Elements;
> + StrTable->MaxStringElements = (UINT8)MaxStringElements;
> + return EFI_SUCCESS;
> +}
> +
> +/** Free memory allocated for the string elements in the string table.
> +
> + @param [IN] StrTable Pointer to the string table
> +
> + @return EFI_SUCCESS Success
> + @return EFI_INVALID_PARAMETER Invalid string table pointer or string
> +elements **/ EFI_STATUS EFIAPI StringTableFree (
> + IN STRING_TABLE *CONST StrTable
> + )
> +{
> + if ((StrTable == NULL) || (StrTable->Elements == NULL)) {
> + return EFI_INVALID_PARAMETER;
> + }
> +
> + FreePool (StrTable->Elements);
> + ZeroMem (StrTable, sizeof (STRING_TABLE));
> + return EFI_SUCCESS;
> +}
> diff --git
> a/DynamicTablesPkg/Library/Common/SmbiosStringTableLib/SmbiosStringTa
> bleLib.inf
> b/DynamicTablesPkg/Library/Common/SmbiosStringTableLib/SmbiosStringTa
> bleLib.inf
> new file mode 100644
> index
> 0000000000000000000000000000000000000000..88624c50e3f3e930074222b6d
> 686f75485538b26
> --- /dev/null
> +++
> b/DynamicTablesPkg/Library/Common/SmbiosStringTableLib/SmbiosStringT
> +++ ableLib.inf
> @@ -0,0 +1,25 @@
> +## @file
> +# SMBIOS String Table Helper library.
> +#
> +# Copyright (c) 2022, Arm Limited. All rights reserved.
> +#
> +# SPDX-License-Identifier: BSD-2-Clause-Patent ##
> +
> +[Defines]
> + INF_VERSION = 0x0001001B
> + BASE_NAME = SmbiosStringTableLib
> + FILE_GUID = 8C570DD8-531E-473F-85C6-9252746DBAC1
> + VERSION_STRING = 1.0
> + MODULE_TYPE = DXE_DRIVER
> + LIBRARY_CLASS = SmbiosStringTableLib
> +
> +[Sources]
> + SmbiosStringTableLib.c
> +
> +[Packages]
> + MdePkg/MdePkg.dec
> + DynamicTablesPkg/DynamicTablesPkg.dec
> +
> +[LibraryClasses]
> + BaseLib
> --
> 'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'
>
>
>
>
>
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