Intel Extensible Firmware Interface - Manual (Page 970)

Extensible Firmware Interface Specification
H-6 12/01/02 Version 1.10
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;
//
// Compress it
//
Status = Encode();
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
//
// Null terminate the compressed data
//
if (mDst < mDstUpperLimit) {
*mDst++ = 0;
}
//
// Fill in compressed size and original size
//
mDst = DstBuffer;
PutDword(mCompSize+1);
PutDword(mOrigSize);