GuidedSectionExtraction.c

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#include "LzmaDecompressLibInternal.h"
 
RETURN_STATUS
EFIAPI
LzmaGuidedSectionGetInfo (
  IN  CONST VOID  *InputSection,
  OUT UINT32      *OutputBufferSize,
  OUT UINT32      *ScratchBufferSize,
  OUT UINT16      *SectionAttribute
  )
{
  ASSERT (InputSection != NULL);
  ASSERT (OutputBufferSize != NULL);
  ASSERT (ScratchBufferSize != NULL);
  ASSERT (SectionAttribute != NULL);
 
  if (IS_SECTION2 (InputSection)) {
    if (!CompareGuid (
           &gLzmaCustomDecompressGuid,
           &(((EFI_GUID_DEFINED_SECTION2 *)InputSection)->SectionDefinitionGuid)
           ))
    {
      return RETURN_INVALID_PARAMETER;
    }
 
    *SectionAttribute = ((EFI_GUID_DEFINED_SECTION2 *)InputSection)->Attributes;
 
    return LzmaUefiDecompressGetInfo (
             (UINT8 *)InputSection + ((EFI_GUID_DEFINED_SECTION2 *)InputSection)->DataOffset,
             SECTION2_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION2 *)InputSection)->DataOffset,
             OutputBufferSize,
             ScratchBufferSize
             );
  } else {
    if (!CompareGuid (
           &gLzmaCustomDecompressGuid,
           &(((EFI_GUID_DEFINED_SECTION *)InputSection)->SectionDefinitionGuid)
           ))
    {
      return RETURN_INVALID_PARAMETER;
    }
 
    *SectionAttribute = ((EFI_GUID_DEFINED_SECTION *)InputSection)->Attributes;
 
    return LzmaUefiDecompressGetInfo (
             (UINT8 *)InputSection + ((EFI_GUID_DEFINED_SECTION *)InputSection)->DataOffset,
             SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *)InputSection)->DataOffset,
             OutputBufferSize,
             ScratchBufferSize
             );
  }
}
 
RETURN_STATUS
EFIAPI
LzmaGuidedSectionExtraction (
  IN CONST  VOID    *InputSection,
  OUT       VOID    **OutputBuffer,
  OUT       VOID    *ScratchBuffer         OPTIONAL,
  OUT       UINT32  *AuthenticationStatus
  )
{
  ASSERT (OutputBuffer != NULL);
  ASSERT (InputSection != NULL);
 
  if (IS_SECTION2 (InputSection)) {
    if (!CompareGuid (
           &gLzmaCustomDecompressGuid,
           &(((EFI_GUID_DEFINED_SECTION2 *)InputSection)->SectionDefinitionGuid)
           ))
    {
      return RETURN_INVALID_PARAMETER;
    }
 
    //
    // Authentication is set to Zero, which may be ignored.
    //
    *AuthenticationStatus = 0;
 
    return LzmaUefiDecompress (
             (UINT8 *)InputSection + ((EFI_GUID_DEFINED_SECTION2 *)InputSection)->DataOffset,
             SECTION2_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION2 *)InputSection)->DataOffset,
             *OutputBuffer,
             ScratchBuffer
             );
  } else {
    if (!CompareGuid (
           &gLzmaCustomDecompressGuid,
           &(((EFI_GUID_DEFINED_SECTION *)InputSection)->SectionDefinitionGuid)
           ))
    {
      return RETURN_INVALID_PARAMETER;
    }
 
    //
    // Authentication is set to Zero, which may be ignored.
    //
    *AuthenticationStatus = 0;
 
    return LzmaUefiDecompress (
             (UINT8 *)InputSection + ((EFI_GUID_DEFINED_SECTION *)InputSection)->DataOffset,
             SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *)InputSection)->DataOffset,
             *OutputBuffer,
             ScratchBuffer
             );
  }
}
 
EFI_STATUS
EFIAPI
LzmaDecompressLibConstructor (
  VOID
  )
{
  return ExtractGuidedSectionRegisterHandlers (
           &gLzmaCustomDecompressGuid,
           LzmaGuidedSectionGetInfo,
           LzmaGuidedSectionExtraction
           );
}