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/** @file
This file declares Section Extraction protocols.
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) 2007, Intel Corporation
All rights reserved. This program and the materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name: SectionExtraction.h
@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 Size in bytes of the section stream.
@param SectionStream 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 Pointer to an EFI_SECTION_TYPE.
@param SectionDefinitionGuid 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 Pointer to a caller-allocated UINTN.
@param AuthenticationStatus 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 in
the 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_BUFFER_TOO_SMALL The size of the input buffer is insufficient to
contain the requested section.
**/
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
//
/**
@par Protocol Description:
The Section Extraction Protocol provides a simple method of extracting
sections from arbitrarily complex files.
@param OpenSectionStream
Takes a bounded stream of sections and returns a section stream handle.
@param GetSection
Given a section stream handle, retrieves the requested section and
meta-data from the section stream.
@param CloseSectionStream
Given a section stream handle, closes the section stream.
**/
struct _EFI_SECTION_EXTRACTION_PROTOCOL {
EFI_OPEN_SECTION_STREAM OpenSectionStream;
EFI_GET_SECTION GetSection;
EFI_CLOSE_SECTION_STREAM CloseSectionStream;
};
extern EFI_GUID gEfiSectionExtractionProtocolGuid;
#endif
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