Function EfiCompress

BaseTools/Source/C/Common/EfiCompress.c:253–346

//

EFI_STATUS
EfiCompress (
  IN      UINT8   *SrcBuffer,
  IN      UINT32  SrcSize,
  IN      UINT8   *DstBuffer,
  IN OUT  UINT32  *DstSize
  )
/*++

Routine Description:

  The main compression routine.

Arguments:

  SrcBuffer   - The buffer storing the source data
  SrcSize     - The size of source data
  DstBuffer   - The buffer to store the compressed data
  DstSize     - On input, the size of DstBuffer; On output,
                the size of the actual compressed data.

Returns:

  EFI_BUFFER_TOO_SMALL  - The DstBuffer is too small. In this case,
                DstSize contains the size needed.
  EFI_SUCCESS           - Compression is successful.

--*/
{
  EFI_STATUS Status = EFI_SUCCESS;

  //
  // Initializations
  //
  mBufSiz = 0;
  mBuf = NULL;
  mText       = NULL;
  mLevel      = NULL;
  mChildCount = NULL;
  mPosition   = NULL;
  mParent     = NULL;
  mPrev       = NULL;
  mNext       = NULL;


  mSrc = SrcBuffer;
  mSrcUpperLimit = mSrc + SrcSize;
  mDst = DstBuffer;
  mDstUpperLimit = mDst + *DstSize;

  PutDword(0L);
  PutDword(0L);

  MakeCrcTable ();

  mOrigSize = mCompSize = 0;
  mCrc = INIT_CRC;