Update CustomDecompress library to support algorithm guid and Update DxeIpl and DxeCo...

[mirror_edk2.git] / IntelFrameworkModulePkg / Library / BaseUefiTianoCustomDecompressLib / BaseUefiTianoCustomDecompressLib.c

/**@file\r
  UEFI and Custom Decompress Library \r
  \r
Copyright (c) 2006, Intel Corporation                                                         \r
All rights reserved. This program and the accompanying materials                          \r
are licensed and made available under the terms and conditions of the BSD License         \r
which accompanies this distribution.  The full text of the license may be found at        \r
http://opensource.org/licenses/bsd-license.php                                            \r
                                                                                          \r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
\r
**/\r
\r
#include <Guid/CustomDecompress.h>\r
#include "BaseUefiTianoCustomDecompressLibInternals.h"\r
\r
VOID\r
FillBuf (\r
  IN  SCRATCH_DATA  *Sd,\r
  IN  UINT16        NumOfBits\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Shift mBitBuf NumOfBits left. Read in NumOfBits of bits from source.\r
\r
Arguments:\r
\r
  Sd        - The global scratch data\r
  NumOfBits  - The number of bits to shift and read.\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  Sd->mBitBuf = (UINT32) (Sd->mBitBuf << NumOfBits);\r
\r
  while (NumOfBits > Sd->mBitCount) {\r
\r
    Sd->mBitBuf |= (UINT32) (Sd->mSubBitBuf << (NumOfBits = (UINT16) (NumOfBits - Sd->mBitCount)));\r
\r
    if (Sd->mCompSize > 0) {\r
      //\r
      // Get 1 byte into SubBitBuf\r
      //\r
      Sd->mCompSize--;\r
      Sd->mSubBitBuf  = 0;\r
      Sd->mSubBitBuf  = Sd->mSrcBase[Sd->mInBuf++];\r
      Sd->mBitCount   = 8;\r
\r
    } else {\r
      //\r
      // No more bits from the source, just pad zero bit.\r
      //\r
      Sd->mSubBitBuf  = 0;\r
      Sd->mBitCount   = 8;\r
\r
    }\r
  }\r
\r
  Sd->mBitCount = (UINT16) (Sd->mBitCount - NumOfBits);\r
  Sd->mBitBuf |= Sd->mSubBitBuf >> Sd->mBitCount;\r
}\r
\r
UINT32\r
GetBits (\r
  IN  SCRATCH_DATA  *Sd,\r
  IN  UINT16        NumOfBits\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Get NumOfBits of bits out from mBitBuf. Fill mBitBuf with subsequent \r
  NumOfBits of bits from source. Returns NumOfBits of bits that are \r
  popped out.\r
\r
Arguments:\r
\r
  Sd            - The global scratch data.\r
  NumOfBits     - The number of bits to pop and read.\r
\r
Returns:\r
\r
  The bits that are popped out.\r
\r
--*/\r
{\r
  UINT32  OutBits;\r
\r
  OutBits = (UINT32) (Sd->mBitBuf >> (BITBUFSIZ - NumOfBits));\r
\r
  FillBuf (Sd, NumOfBits);\r
\r
  return OutBits;\r
}\r
\r
UINT16\r
MakeTable (\r
  IN  SCRATCH_DATA  *Sd,\r
  IN  UINT16        NumOfChar,\r
  IN  UINT8         *BitLen,\r
  IN  UINT16        TableBits,\r
  OUT UINT16        *Table\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Creates Huffman Code mapping table according to code length array.\r
\r
Arguments:\r
\r
  Sd        - The global scratch data\r
  NumOfChar - Number of symbols in the symbol set\r
  BitLen    - Code length array\r
  TableBits - The width of the mapping table\r
  Table     - The table\r
  \r
Returns:\r
  \r
  0         - OK.\r
  BAD_TABLE - The table is corrupted.\r
\r
--*/\r
{\r
  UINT16  Count[17];\r
  UINT16  Weight[17];\r
  UINT16  Start[18];\r
  UINT16  *Pointer;\r
  UINT16  Index3;\r
  volatile UINT16  Index;\r
  UINT16  Len;\r
  UINT16  Char;\r
  UINT16  JuBits;\r
  UINT16  Avail;\r
  UINT16  NextCode;\r
  UINT16  Mask;\r
  UINT16  WordOfStart;\r
  UINT16  WordOfCount;\r
\r
  for (Index = 1; Index <= 16; Index++) {\r
    Count[Index] = 0;\r
  }\r
\r
  for (Index = 0; Index < NumOfChar; Index++) {\r
    Count[BitLen[Index]]++;\r
  }\r
\r
  Start[1] = 0;\r
\r
  for (Index = 1; Index <= 16; Index++) {\r
    WordOfStart = Start[Index];\r
    WordOfCount = Count[Index];\r
    Start[Index + 1] = (UINT16) (WordOfStart + (WordOfCount << (16 - Index)));\r
  }\r
\r
  if (Start[17] != 0) {\r
    /*(1U << 16)*/\r
    return (UINT16) BAD_TABLE;\r
  }\r
\r
  JuBits = (UINT16) (16 - TableBits);\r
\r
  for (Index = 1; Index <= TableBits; Index++) {\r
    Start[Index] >>= JuBits;\r
    Weight[Index] = (UINT16) (1U << (TableBits - Index));\r
  }\r
\r
  while (Index <= 16) {\r
    Weight[Index] = (UINT16) (1U << (16 - Index));\r
    Index++;\r
  }\r
\r
  Index = (UINT16) (Start[TableBits + 1] >> JuBits);\r
\r
  if (Index != 0) {\r
    Index3 = (UINT16) (1U << TableBits);\r
    while (Index != Index3) {\r
      Table[Index++] = 0;\r
    }\r
  }\r
\r
  Avail = NumOfChar;\r
  Mask  = (UINT16) (1U << (15 - TableBits));\r
\r
  for (Char = 0; Char < NumOfChar; Char++) {\r
\r
    Len = BitLen[Char];\r
    if (Len == 0) {\r
      continue;\r
    }\r
\r
    NextCode = (UINT16) (Start[Len] + Weight[Len]);\r
\r
    if (Len <= TableBits) {\r
\r
      for (Index = Start[Len]; Index < NextCode; Index++) {\r
        Table[Index] = Char;\r
      }\r
\r
    } else {\r
\r
      Index3  = Start[Len];\r
      Pointer = &Table[Index3 >> JuBits];\r
      Index   = (UINT16) (Len - TableBits);\r
\r
      while (Index != 0) {\r
        if (*Pointer == 0) {\r
          Sd->mRight[Avail]                     = Sd->mLeft[Avail] = 0;\r
          *Pointer = Avail++;\r
        }\r
\r
        if (Index3 & Mask) {\r
          Pointer = &Sd->mRight[*Pointer];\r
        } else {\r
          Pointer = &Sd->mLeft[*Pointer];\r
        }\r
\r
        Index3 <<= 1;\r
        Index--;\r
      }\r
\r
      *Pointer = Char;\r
\r
    }\r
\r
    Start[Len] = NextCode;\r
  }\r
  //\r
  // Succeeds\r
  //\r
  return 0;\r
}\r
\r
UINT32\r
DecodeP (\r
  IN  SCRATCH_DATA  *Sd\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Decodes a position value.\r
\r
Arguments:\r
\r
  Sd      - the global scratch data\r
\r
Returns:\r
\r
  The position value decoded.\r
\r
--*/\r
{\r
  UINT16  Val;\r
  UINT32  Mask;\r
  UINT32  Pos;\r
\r
  Val = Sd->mPTTable[Sd->mBitBuf >> (BITBUFSIZ - 8)];\r
\r
  if (Val >= MAXNP) {\r
    Mask = 1U << (BITBUFSIZ - 1 - 8);\r
\r
    do {\r
\r
      if (Sd->mBitBuf & Mask) {\r
        Val = Sd->mRight[Val];\r
      } else {\r
        Val = Sd->mLeft[Val];\r
      }\r
\r
      Mask >>= 1;\r
    } while (Val >= MAXNP);\r
  }\r
  //\r
  // Advance what we have read\r
  //\r
  FillBuf (Sd, Sd->mPTLen[Val]);\r
\r
  Pos = Val;\r
  if (Val > 1) {\r
    Pos = (UINT32) ((1U << (Val - 1)) + GetBits (Sd, (UINT16) (Val - 1)));\r
  }\r
\r
  return Pos;\r
}\r
\r
UINT16\r
ReadPTLen (\r
  IN  SCRATCH_DATA  *Sd,\r
  IN  UINT16        nn,\r
  IN  UINT16        nbit,\r
  IN  UINT16        Special\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Reads code lengths for the Extra Set or the Position Set\r
\r
Arguments:\r
\r
  Sd        - The global scratch data\r
  nn        - Number of symbols\r
  nbit      - Number of bits needed to represent nn\r
  Special   - The special symbol that needs to be taken care of \r
\r
Returns:\r
\r
  0         - OK.\r
  BAD_TABLE - Table is corrupted.\r
\r
--*/\r
{\r
  UINT16  Number;\r
  UINT16  CharC;\r
  volatile UINT16  Index;\r
  UINT32  Mask;\r
\r
  Number = (UINT16) GetBits (Sd, nbit);\r
\r
  if (Number == 0) {\r
    CharC = (UINT16) GetBits (Sd, nbit);\r
\r
    for (Index = 0; Index < 256; Index++) {\r
      Sd->mPTTable[Index] = CharC;\r
    }\r
\r
    for (Index = 0; Index < nn; Index++) {\r
      Sd->mPTLen[Index] = 0;\r
    }\r
\r
    return 0;\r
  }\r
\r
  Index = 0;\r
\r
  while (Index < Number) {\r
\r
    CharC = (UINT16) (Sd->mBitBuf >> (BITBUFSIZ - 3));\r
\r
    if (CharC == 7) {\r
      Mask = 1U << (BITBUFSIZ - 1 - 3);\r
      while (Mask & Sd->mBitBuf) {\r
        Mask >>= 1;\r
        CharC += 1;\r
      }\r
    }\r
\r
    FillBuf (Sd, (UINT16) ((CharC < 7) ? 3 : CharC - 3));\r
\r
    Sd->mPTLen[Index++] = (UINT8) CharC;\r
\r
    if (Index == Special) {\r
      CharC = (UINT16) GetBits (Sd, 2);\r
      while ((INT16) (--CharC) >= 0) {\r
        Sd->mPTLen[Index++] = 0;\r
      }\r
    }\r
  }\r
\r
  while (Index < nn) {\r
    Sd->mPTLen[Index++] = 0;\r
  }\r
\r
  return MakeTable (Sd, nn, Sd->mPTLen, 8, Sd->mPTTable);\r
}\r
\r
VOID\r
ReadCLen (\r
  SCRATCH_DATA  *Sd\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Reads code lengths for Char&Len Set.\r
\r
Arguments:\r
\r
  Sd    - the global scratch data\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  UINT16  Number;\r
  UINT16  CharC;\r
  volatile UINT16  Index;\r
  UINT32  Mask;\r
\r
  Number = (UINT16) GetBits (Sd, CBIT);\r
\r
  if (Number == 0) {\r
    CharC = (UINT16) GetBits (Sd, CBIT);\r
\r
    for (Index = 0; Index < NC; Index++) {\r
      Sd->mCLen[Index] = 0;\r
    }\r
\r
    for (Index = 0; Index < 4096; Index++) {\r
      Sd->mCTable[Index] = CharC;\r
    }\r
\r
    return ;\r
  }\r
\r
  Index = 0;\r
  while (Index < Number) {\r
\r
    CharC = Sd->mPTTable[Sd->mBitBuf >> (BITBUFSIZ - 8)];\r
    if (CharC >= NT) {\r
      Mask = 1U << (BITBUFSIZ - 1 - 8);\r
\r
      do {\r
\r
        if (Mask & Sd->mBitBuf) {\r
          CharC = Sd->mRight[CharC];\r
        } else {\r
          CharC = Sd->mLeft[CharC];\r
        }\r
\r
        Mask >>= 1;\r
\r
      } while (CharC >= NT);\r
    }\r
    //\r
    // Advance what we have read\r
    //\r
    FillBuf (Sd, Sd->mPTLen[CharC]);\r
\r
    if (CharC <= 2) {\r
\r
      if (CharC == 0) {\r
        CharC = 1;\r
      } else if (CharC == 1) {\r
        CharC = (UINT16) (GetBits (Sd, 4) + 3);\r
      } else if (CharC == 2) {\r
        CharC = (UINT16) (GetBits (Sd, CBIT) + 20);\r
      }\r
\r
      while ((INT16) (--CharC) >= 0) {\r
        Sd->mCLen[Index++] = 0;\r
      }\r
\r
    } else {\r
\r
      Sd->mCLen[Index++] = (UINT8) (CharC - 2);\r
\r
    }\r
  }\r
\r
  while (Index < NC) {\r
    Sd->mCLen[Index++] = 0;\r
  }\r
\r
  MakeTable (Sd, NC, Sd->mCLen, 12, Sd->mCTable);\r
\r
  return ;\r
}\r
\r
UINT16\r
DecodeC (\r
  SCRATCH_DATA  *Sd\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Decode a character/length value.\r
\r
Arguments:\r
\r
  Sd    - The global scratch data.\r
\r
Returns:\r
\r
  The value decoded.\r
\r
--*/\r
{\r
  UINT16  Index2;\r
  UINT32  Mask;\r
\r
  if (Sd->mBlockSize == 0) {\r
    //\r
    // Starting a new block\r
    //\r
    Sd->mBlockSize    = (UINT16) GetBits (Sd, 16);\r
    Sd->mBadTableFlag = ReadPTLen (Sd, NT, TBIT, 3);\r
    if (Sd->mBadTableFlag != 0) {\r
      return 0;\r
    }\r
\r
    ReadCLen (Sd);\r
\r
    Sd->mBadTableFlag = ReadPTLen (Sd, MAXNP, Sd->mPBit, (UINT16) (-1));\r
    if (Sd->mBadTableFlag != 0) {\r
      return 0;\r
    }\r
  }\r
\r
  Sd->mBlockSize--;\r
  Index2 = Sd->mCTable[Sd->mBitBuf >> (BITBUFSIZ - 12)];\r
\r
  if (Index2 >= NC) {\r
    Mask = 1U << (BITBUFSIZ - 1 - 12);\r
\r
    do {\r
      if (Sd->mBitBuf & Mask) {\r
        Index2 = Sd->mRight[Index2];\r
      } else {\r
        Index2 = Sd->mLeft[Index2];\r
      }\r
\r
      Mask >>= 1;\r
    } while (Index2 >= NC);\r
  }\r
  //\r
  // Advance what we have read\r
  //\r
  FillBuf (Sd, Sd->mCLen[Index2]);\r
\r
  return Index2;\r
}\r
\r
VOID\r
Decode (\r
  SCRATCH_DATA  *Sd\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Decode the source data and put the resulting data into the destination buffer.\r
\r
Arguments:\r
\r
  Sd            - The global scratch data\r
\r
Returns: (VOID)\r
\r
 --*/\r
{\r
  UINT16  BytesRemain;\r
  UINT32  DataIdx;\r
  UINT16  CharC;\r
\r
  BytesRemain = (UINT16) (-1);\r
\r
  DataIdx     = 0;\r
\r
  for (;;) {\r
    CharC = DecodeC (Sd);\r
    if (Sd->mBadTableFlag != 0) {\r
      goto Done ;\r
    }\r
\r
    if (CharC < 256) {\r
      //\r
      // Process an Original character\r
      //\r
      if (Sd->mOutBuf >= Sd->mOrigSize) {\r
        goto Done ;\r
      } else {\r
        Sd->mDstBase[Sd->mOutBuf++] = (UINT8) CharC;\r
      }\r
\r
    } else {\r
      //\r
      // Process a Pointer\r
      //\r
      CharC       = (UINT16) (CharC - (UINT8_MAX + 1 - THRESHOLD));\r
\r
      BytesRemain = CharC;\r
\r
      DataIdx     = Sd->mOutBuf - DecodeP (Sd) - 1;\r
\r
      BytesRemain--;\r
      while ((INT16) (BytesRemain) >= 0) {\r
        Sd->mDstBase[Sd->mOutBuf++] = Sd->mDstBase[DataIdx++];\r
        if (Sd->mOutBuf >= Sd->mOrigSize) {\r
          goto Done ;\r
        }\r
\r
        BytesRemain--;\r
      }\r
    }\r
  }\r
\r
Done:\r
  return ;\r
}\r
\r
RETURN_STATUS\r
EFIAPI\r
UefiDecompressGetInfo (\r
  IN  CONST VOID  *Source,\r
  IN  UINT32      SourceSize,\r
  OUT UINT32      *DestinationSize,\r
  OUT UINT32      *ScratchSize\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  The internal implementation of *_DECOMPRESS_PROTOCOL.GetInfo().\r
\r
Arguments:\r
\r
  Source          - The source buffer containing the compressed data.\r
  SourceSize      - The size of source buffer\r
  DestinationSize - The size of destination buffer.\r
  ScratchSize     - The size of scratch buffer.\r
\r
Returns:\r
\r
  RETURN_SUCCESS           - The size of destination buffer and the size of scratch buffer are successull retrieved.\r
  RETURN_INVALID_PARAMETER - The source data is corrupted\r
\r
--*/\r
{\r
  UINT32  CompressedSize;\r
\r
  ASSERT (Source != NULL);\r
  ASSERT (DestinationSize != NULL);\r
  ASSERT (ScratchSize != NULL);\r
\r
  *ScratchSize  = sizeof (SCRATCH_DATA);\r
\r
  if (SourceSize < 8) {\r
    return RETURN_INVALID_PARAMETER;\r
  }\r
\r
  CopyMem (&CompressedSize, Source, sizeof (UINT32));\r
  CopyMem (DestinationSize, (VOID *)((UINT8 *)Source + 4), sizeof (UINT32));\r
\r
  if (SourceSize < (CompressedSize + 8)) {\r
    return RETURN_INVALID_PARAMETER;\r
  }\r
\r
  return RETURN_SUCCESS;\r
}\r
\r
RETURN_STATUS\r
EFIAPI\r
UefiTianoDecompress (\r
  IN CONST VOID  *Source,\r
  IN OUT VOID    *Destination,\r
  IN OUT VOID    *Scratch,\r
  IN UINT32      Version\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  The internal implementation of *_DECOMPRESS_PROTOCOL.Decompress().\r
\r
Arguments:\r
\r
  Source          - The source buffer containing the compressed data.\r
  Destination     - The destination buffer to store the decompressed data\r
  Scratch         - The buffer used internally by the decompress routine. This  buffer is needed to store intermediate data.\r
  Version         - 1 for UEFI Decompress algoruthm, 2 for Tiano Decompess algorithm\r
\r
Returns:\r
\r
  RETURN_SUCCESS           - Decompression is successfull\r
  RETURN_INVALID_PARAMETER - The source data is corrupted\r
\r
--*/\r
{\r
  volatile UINT32  Index;\r
  UINT32           CompSize;\r
  UINT32           OrigSize;\r
  SCRATCH_DATA     *Sd;\r
  CONST UINT8      *Src;\r
  UINT8            *Dst;\r
\r
  ASSERT (Source != NULL);\r
  ASSERT (Destination != NULL);\r
  ASSERT (Scratch != NULL);\r
\r
  Src     = Source;\r
  Dst     = Destination;\r
\r
  Sd = (SCRATCH_DATA *) Scratch;\r
\r
  CompSize  = Src[0] + (Src[1] << 8) + (Src[2] << 16) + (Src[3] << 24);\r
  OrigSize  = Src[4] + (Src[5] << 8) + (Src[6] << 16) + (Src[7] << 24);\r
\r
  //\r
  // If compressed file size is 0, return\r
  //\r
  if (OrigSize == 0) {\r
    return RETURN_SUCCESS;\r
  }\r
\r
  Src = Src + 8;\r
\r
  for (Index = 0; Index < sizeof (SCRATCH_DATA); Index++) {\r
    ((UINT8 *) Sd)[Index] = 0;\r
  }\r
  //\r
  // The length of the field 'Position Set Code Length Array Size' in Block Header.\r
  // For EFI 1.1 de/compression algorithm(Version 1), mPBit = 4\r
  // For Tiano de/compression algorithm(Version 2), mPBit = 5\r
  //\r
  switch (Version) {\r
    case 1 :\r
      Sd->mPBit = 4;\r
      break;\r
    case 2 :\r
      Sd->mPBit = 5;\r
      break;\r
    default:\r
      ASSERT (FALSE);\r
  }\r
  Sd->mSrcBase  = (UINT8 *)Src;\r
  Sd->mDstBase  = Dst;\r
  Sd->mCompSize = CompSize;\r
  Sd->mOrigSize = OrigSize;\r
\r
  //\r
  // Fill the first BITBUFSIZ bits\r
  //\r
  FillBuf (Sd, BITBUFSIZ);\r
\r
  //\r
  // Decompress it\r
  //\r
  Decode (Sd);\r
\r
  if (Sd->mBadTableFlag != 0) {\r
    //\r
    // Something wrong with the source\r
    //\r
    return RETURN_INVALID_PARAMETER;\r
  }\r
\r
  return RETURN_SUCCESS;\r
}\r
\r
RETURN_STATUS\r
EFIAPI\r
UefiDecompress (\r
  IN CONST VOID  *Source,\r
  IN OUT VOID    *Destination,\r
  IN OUT VOID    *Scratch\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  The internal implementation of *_DECOMPRESS_PROTOCOL.Decompress().\r
\r
Arguments:\r
\r
  Source          - The source buffer containing the compressed data.\r
  Destination     - The destination buffer to store the decompressed data\r
  Scratch         - The buffer used internally by the decompress routine. This  buffer is needed to store intermediate data.\r
\r
Returns:\r
\r
  RETURN_SUCCESS           - Decompression is successfull\r
  RETURN_INVALID_PARAMETER - The source data is corrupted\r
\r
--*/\r
{\r
  return UefiTianoDecompress (Source, Destination, Scratch, 1);\r
}\r
\r
RETURN_STATUS\r
EFIAPI\r
CustomDecompressGetInfo (\r
  IN  CONST GUID *DecompressGuid,\r
  IN  CONST VOID  *Source,\r
  IN  UINT32      SourceSize,\r
  OUT UINT32      *DestinationSize,\r
  OUT UINT32      *ScratchSize\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  The internal implementation of *_DECOMPRESS_PROTOCOL.GetInfo().\r
\r
Arguments:\r
  DecompressGuid    The guid matches this decompress method.\r
  Source          - The source buffer containing the compressed data.\r
  SourceSize      - The size of source buffer\r
  DestinationSize - The size of destination buffer.\r
  ScratchSize     - The size of scratch buffer.\r
\r
Returns:\r
\r
  RETURN_SUCCESS           - The size of destination buffer and the size of scratch buffer are successull retrieved.\r
  RETURN_INVALID_PARAMETER - The source data is corrupted\r
  RETURN_UNSUPPORTED       - Decompress method is not supported.\r
\r
--*/\r
{\r
  if (CompareGuid (DecompressGuid, &gTianoCustomDecompressGuid)) {\r
    return UefiDecompressGetInfo (Source, SourceSize, DestinationSize, ScratchSize);\r
  } else {\r
    return RETURN_UNSUPPORTED;\r
  }\r
}\r
\r
RETURN_STATUS\r
EFIAPI\r
CustomDecompress (\r
  IN  CONST GUID *DecompressGuid,\r
  IN CONST VOID  *Source,\r
  IN OUT VOID    *Destination,\r
  IN OUT VOID    *Scratch\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  The internal implementation of *_DECOMPRESS_PROTOCOL.Decompress().\r
\r
Arguments:\r
  DecompressGuid    The guid matches this decompress method.\r
  Source          - The source buffer containing the compressed data.\r
  Destination     - The destination buffer to store the decompressed data\r
  Scratch         - The buffer used internally by the decompress routine. This  buffer is needed to store intermediate data.\r
\r
Returns:\r
\r
  RETURN_SUCCESS           - Decompression is successfull\r
  RETURN_INVALID_PARAMETER - The source data is corrupted\r
  RETURN_UNSUPPORTED       - Decompress method is not supported.\r
\r
--*/\r
{\r
  if (CompareGuid (DecompressGuid, &gTianoCustomDecompressGuid)) {\r
    return UefiTianoDecompress (Source, Destination, Scratch, 2);\r
  } else {\r
    return RETURN_UNSUPPORTED;\r
  }\r
}\r
\r
/**
  Get decompress method guid list.\r
\r
  @param[in, out]  AlgorithmGuidTable   The decompress method guid list.
  @param[in, out]  NumberOfAlgorithms   The number of decompress methods.

  @retval  RETURN_SUCCESS            Get all algorithmes list successfully.
  @retval  RETURN_INVALID_PARAMETER  Input paramter error.\r
  @retval  RETURN_OUT_OF_RESOURCES   Source is not enough.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
CustomDecompressGetAlgorithms (\r
   IN OUT  GUID   **AlgorithmGuidTable,\r
   IN OUT  UINTN  *NumberOfAlgorithms\r
  )\r
{\r
  if (NumberOfAlgorithms == NULL) {\r
    return RETURN_INVALID_PARAMETER;\r
  }\r
  \r
  if (*NumberOfAlgorithms < 1) {\r
    *NumberOfAlgorithms = 1;\r
    return RETURN_OUT_OF_RESOURCES;\r
  }\r
  \r
  if (AlgorithmGuidTable == NULL) {\r
    return RETURN_INVALID_PARAMETER;\r
  }\r
\r
  AlgorithmGuidTable [0] = &gTianoCustomDecompressGuid;\r
  *NumberOfAlgorithms = 1;\r
  \r
  return RETURN_SUCCESS;  \r
}