/** @file
  This file declares Section Extraction Protocol.

  This interface provides a means of decoding a set of sections into a linked list of
  leaf sections.  This provides for an extensible and flexible file format.

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

  @par Revision Reference:
  This protocol is defined in Firmware Volume Specification.
  Version 0.9.

**/

#ifndef _SECTION_EXTRACTION_PROTOCOL_H_
#define _SECTION_EXTRACTION_PROTOCOL_H_

//
// Protocol GUID definition
//
#define EFI_SECTION_EXTRACTION_PROTOCOL_GUID \
  { \
    0x448F5DA4, 0x6DD7, 0x4FE1, {0x93, 0x07, 0x69, 0x22, 0x41, 0x92, 0x21, 0x5D } \
  }

typedef struct _EFI_SECTION_EXTRACTION_PROTOCOL EFI_SECTION_EXTRACTION_PROTOCOL;

//
// Protocol member functions
//
/**
  Creates and returns a new section stream handle to represent the new section stream.

  @param  This                  Indicates the EFI_SECTION_EXTRACTION_PROTOCOL instance.
  @param  SectionStreamLength   The size in bytes of the section stream.
  @param  SectionStream         A buffer containing the new section stream.
  @param  SectionStreamHandle   A pointer to a caller-allocated UINTN that,
                                on output, contains the new section stream handle.

  @retval EFI_SUCCESS           The SectionStream was successfully processed, and
                                the section stream handle was returned.
  @retval EFI_OUT_OF_RESOURCES  The system has insufficient resources to
                                process the request.
  @retval EFI_INVALID_PARAMETER The section stream may be corrupt or the value
                                of SectionStreamLength may be incorrect.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_OPEN_SECTION_STREAM)(
  IN  EFI_SECTION_EXTRACTION_PROTOCOL                   *This,
  IN  UINTN                                             SectionStreamLength,
  IN  VOID                                              *SectionStream,
  OUT UINTN                                             *SectionStreamHandle
  );

/**
  Reads and returns a single section from a section stream.

  @param  This                  Indicates the EFI_SECTION_EXTRACTION_PROTOCOL instance.
  @param  SectionStreamHandle   Indicates from which section stream to read.
  @param  SectionType           The pointer to an EFI_SECTION_TYPE. If SectionType == NULL,
                                the contents of the entire section stream are returned
                                in Buffer. If SectionType is not NULL, only the
                                requested section is returned. EFI_SECTION_ALL
                                matches all section types and can be used as a
                                wild card to extract all sections in order.
  @param  SectionDefinitionGuid The pointer to an EFI_GUID. If SectionType ==
                                EFI_SECTION_GUID_DEFINED, SectionDefinitionGuid
                                indicates what section GUID to search for. If
                                SectionType !=EFI_SECTION_GUID_DEFINED, then
                                SectionDefinitionGuid is unused and is ignored.
  @param  SectionInstance       Indicates which instance of the requested section
                                type to return when SectionType is not NULL.
  @param  SectionStreamHandle   A pointer to a caller-allocated UINTN that, on output,
                                contains the new section stream handle.
  @param  Buffer                Pointer to a pointer to a buffer in which the section
                                contents are returned.
  @param  BufferSize            A pointer to a caller-allocated UINTN.
  @param  AuthenticationStatus  A pointer to a caller-allocated UINT32 in
                                which any meta-data from encapsulation GUID-defined
                                sections is returned.

  @retval EFI_SUCCESS           The SectionStream was successfully processed and
                                the section contents were returned in Buffer.
  @retval EFI_PROTOCOL_ERROR    A GUID-defined section was encountered inthe section
                                stream with its EFI_GUIDED_SECTION_PROCESSING_REQUIRED
                                bit set, but there was no corresponding GUIDed
                                Section Extraction Protocol in the handle database.
  @retval EFI_NOT_FOUND         An error was encountered when parsing the SectionStream,
                                which indicates that the SectionStream is not
                                correctly formatted. Or, the requested section does not exist.
  @retval EFI_OUT_OF_RESOURCES  The system has insufficient resources to process
                                the request.
  @retval EFI_INVALID_PARAMETER The SectionStreamHandle does not exist.
  @retval EFI_WARN_BUFFER_TOO_SMALL The size of the input buffer is insufficient
                                    to contain the requested section. The input
                                    buffer is filled and section contents are truncated.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_GET_SECTION)(
  IN EFI_SECTION_EXTRACTION_PROTOCOL                    *This,
  IN UINTN                                              SectionStreamHandle,
  IN EFI_SECTION_TYPE                                   *SectionType,
  IN EFI_GUID                                           *SectionDefinitionGuid,
  IN UINTN                                              SectionInstance,
  IN VOID                                               **Buffer,
  IN OUT UINTN                                          *BufferSize,
  OUT UINT32                                            *AuthenticationStatus
  );

/**
  Deletes a section stream handle and returns all associated resources to the system.

  @param  This                  Indicates the EFI_SECTION_EXTRACTION_PROTOCOL instance.
  @param  SectionStreamHandle   Indicates the section stream to close.
  @retval EFI_SUCCESS           The SectionStream was successfully processed and
                                the section stream handle was returned.
  @retval EFI_INVALID_PARAMETER The SectionStreamHandle does not exist.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_CLOSE_SECTION_STREAM)(
  IN EFI_SECTION_EXTRACTION_PROTOCOL                    *This,
  IN UINTN                                              SectionStreamHandle
  );

//
// Protocol definition
//
struct _EFI_SECTION_EXTRACTION_PROTOCOL {
  ///
  ///  Takes a bounded stream of sections and returns a section stream handle.
  ///
  EFI_OPEN_SECTION_STREAM   OpenSectionStream;

  ///
  ///  Given a section stream handle, retrieves the requested section and
  ///  meta-data from the section stream.
  ///
  EFI_GET_SECTION           GetSection;

  ///
  ///  Given a section stream handle, closes the section stream.
  ///
  EFI_CLOSE_SECTION_STREAM  CloseSectionStream;
};

extern EFI_GUID gEfiSectionExtractionProtocolGuid;

#endif