BaseTools: Clean up source files

[mirror_edk2.git] / BaseTools / Source / C / Common / TianoCompress.c

/** @file\r
Compression routine. The compression algorithm is a mixture of LZ77 and Huffman\r
coding. LZ77 transforms the source data into a sequence of Original Characters\r
and Pointers to repeated strings. This sequence is further divided into Blocks\r
and Huffman codings are applied to each Block.\r
\r
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
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 "Compress.h"\r
\r
//\r
// Macro Definitions\r
//\r
#undef  UINT8_MAX\r
typedef INT32 NODE;\r
#define UINT8_MAX     0xff\r
#define UINT8_BIT     8\r
#define THRESHOLD     3\r
#define INIT_CRC      0\r
#define WNDBIT        19\r
#define WNDSIZ        (1U << WNDBIT)\r
#define MAXMATCH      256\r
#define BLKSIZ        (1U << 14)  // 16 * 1024U\r
#define PERC_FLAG     0x80000000U\r
#define CODE_BIT      16\r
#define NIL           0\r
#define MAX_HASH_VAL  (3 * WNDSIZ + (WNDSIZ / 512 + 1) * UINT8_MAX)\r
#define HASH(p, c)    ((p) + ((c) << (WNDBIT - 9)) + WNDSIZ * 2)\r
#define CRCPOLY       0xA001\r
#define UPDATE_CRC(c) mCrc = mCrcTable[(mCrc ^ (c)) & 0xFF] ^ (mCrc >> UINT8_BIT)\r
\r
//\r
// C: the Char&Len Set; P: the Position Set; T: the exTra Set\r
//\r
#define NC    (UINT8_MAX + MAXMATCH + 2 - THRESHOLD)\r
#define CBIT  9\r
#define NP    (WNDBIT + 1)\r
#define PBIT  5\r
#define NT    (CODE_BIT + 3)\r
#define TBIT  5\r
#if NT > NP\r
#define NPT NT\r
#else\r
#define NPT NP\r
#endif\r
//\r
// Function Prototypes\r
//\r
\r
STATIC\r
VOID\r
PutDword(\r
  IN UINT32 Data\r
  );\r
\r
STATIC\r
EFI_STATUS\r
AllocateMemory (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
FreeMemory (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
InitSlide (\r
  VOID\r
  );\r
\r
STATIC\r
NODE\r
Child (\r
  IN NODE   NodeQ,\r
  IN UINT8  CharC\r
  );\r
\r
STATIC\r
VOID\r
MakeChild (\r
  IN NODE  NodeQ,\r
  IN UINT8 CharC,\r
  IN NODE  NodeR\r
  );\r
\r
STATIC\r
VOID\r
Split (\r
  IN NODE Old\r
  );\r
\r
STATIC\r
VOID\r
InsertNode (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
DeleteNode (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
GetNextMatch (\r
  VOID\r
  );\r
\r
STATIC\r
EFI_STATUS\r
Encode (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
CountTFreq (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
WritePTLen (\r
  IN INT32 Number,\r
  IN INT32 nbit,\r
  IN INT32 Special\r
  );\r
\r
STATIC\r
VOID\r
WriteCLen (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
EncodeC (\r
  IN INT32 Value\r
  );\r
\r
STATIC\r
VOID\r
EncodeP (\r
  IN UINT32 Value\r
  );\r
\r
STATIC\r
VOID\r
SendBlock (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
Output (\r
  IN UINT32 c,\r
  IN UINT32 p\r
  );\r
\r
STATIC\r
VOID\r
HufEncodeStart (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
HufEncodeEnd (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
MakeCrcTable (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
PutBits (\r
  IN INT32  Number,\r
  IN UINT32 Value\r
  );\r
\r
STATIC\r
INT32\r
FreadCrc (\r
  OUT UINT8 *Pointer,\r
  IN  INT32 Number\r
  );\r
\r
STATIC\r
VOID\r
InitPutBits (\r
  VOID\r
  );\r
\r
STATIC\r
VOID\r
CountLen (\r
  IN INT32 Index\r
  );\r
\r
STATIC\r
VOID\r
MakeLen (\r
  IN INT32 Root\r
  );\r
\r
STATIC\r
VOID\r
DownHeap (\r
  IN INT32 Index\r
  );\r
\r
STATIC\r
VOID\r
MakeCode (\r
  IN  INT32       Number,\r
  IN  UINT8 Len[  ],\r
  OUT UINT16 Code[]\r
  );\r
\r
STATIC\r
INT32\r
MakeTree (\r
  IN  INT32            NParm,\r
  IN  UINT16  FreqParm[],\r
  OUT UINT8   LenParm[ ],\r
  OUT UINT16  CodeParm[]\r
  );\r
\r
//\r
//  Global Variables\r
//\r
STATIC UINT8  *mSrc, *mDst, *mSrcUpperLimit, *mDstUpperLimit;\r
\r
STATIC UINT8  *mLevel, *mText, *mChildCount, *mBuf, mCLen[NC], mPTLen[NPT], *mLen;\r
STATIC INT16  mHeap[NC + 1];\r
STATIC INT32  mRemainder, mMatchLen, mBitCount, mHeapSize, mN;\r
STATIC UINT32 mBufSiz = 0, mOutputPos, mOutputMask, mSubBitBuf, mCrc;\r
STATIC UINT32 mCompSize, mOrigSize;\r
\r
STATIC UINT16 *mFreq, *mSortPtr, mLenCnt[17], mLeft[2 * NC - 1], mRight[2 * NC - 1], mCrcTable[UINT8_MAX + 1],\r
  mCFreq[2 * NC - 1], mCCode[NC], mPFreq[2 * NP - 1], mPTCode[NPT], mTFreq[2 * NT - 1];\r
\r
STATIC NODE   mPos, mMatchPos, mAvail, *mPosition, *mParent, *mPrev, *mNext = NULL;\r
\r
//\r
// functions\r
//\r
EFI_STATUS\r
TianoCompress (\r
  IN      UINT8   *SrcBuffer,\r
  IN      UINT32  SrcSize,\r
  IN      UINT8   *DstBuffer,\r
  IN OUT  UINT32  *DstSize\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  The internal implementation of [Efi/Tiano]Compress().\r
\r
Arguments:\r
\r
  SrcBuffer   - The buffer storing the source data\r
  SrcSize     - The size of source data\r
  DstBuffer   - The buffer to store the compressed data\r
  DstSize     - On input, the size of DstBuffer; On output,\r
                the size of the actual compressed data.\r
  Version     - The version of de/compression algorithm.\r
                Version 1 for UEFI 2.0 de/compression algorithm.\r
                Version 2 for Tiano de/compression algorithm.\r
\r
Returns:\r
\r
  EFI_BUFFER_TOO_SMALL  - The DstBuffer is too small. In this case,\r
                DstSize contains the size needed.\r
  EFI_SUCCESS           - Compression is successful.\r
  EFI_OUT_OF_RESOURCES  - No resource to complete function.\r
  EFI_INVALID_PARAMETER - Parameter supplied is wrong.\r
\r
--*/\r
{\r
  EFI_STATUS  Status;\r
\r
  //\r
  // Initializations\r
  //\r
  mBufSiz         = 0;\r
  mBuf            = NULL;\r
  mText           = NULL;\r
  mLevel          = NULL;\r
  mChildCount     = NULL;\r
  mPosition       = NULL;\r
  mParent         = NULL;\r
  mPrev           = NULL;\r
  mNext           = NULL;\r
\r
  mSrc            = SrcBuffer;\r
  mSrcUpperLimit  = mSrc + SrcSize;\r
  mDst            = DstBuffer;\r
  mDstUpperLimit  = mDst +*DstSize;\r
\r
  PutDword (0L);\r
  PutDword (0L);\r
\r
  MakeCrcTable ();\r
\r
  mOrigSize             = mCompSize = 0;\r
  mCrc                  = INIT_CRC;\r
\r
  //\r
  // Compress it\r
  //\r
  Status = Encode ();\r
  if (EFI_ERROR (Status)) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
  //\r
  // Null terminate the compressed data\r
  //\r
  if (mDst < mDstUpperLimit) {\r
    *mDst++ = 0;\r
  }\r
  //\r
  // Fill in compressed size and original size\r
  //\r
  mDst = DstBuffer;\r
  PutDword (mCompSize + 1);\r
  PutDword (mOrigSize);\r
\r
  //\r
  // Return\r
  //\r
  if (mCompSize + 1 + 8 > *DstSize) {\r
    *DstSize = mCompSize + 1 + 8;\r
    return EFI_BUFFER_TOO_SMALL;\r
  } else {\r
    *DstSize = mCompSize + 1 + 8;\r
    return EFI_SUCCESS;\r
  }\r
\r
}\r
\r
STATIC\r
VOID\r
PutDword (\r
  IN UINT32 Data\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Put a dword to output stream\r
\r
Arguments:\r
\r
  Data    - the dword to put\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  if (mDst < mDstUpperLimit) {\r
    *mDst++ = (UINT8) (((UINT8) (Data)) & 0xff);\r
  }\r
\r
  if (mDst < mDstUpperLimit) {\r
    *mDst++ = (UINT8) (((UINT8) (Data >> 0x08)) & 0xff);\r
  }\r
\r
  if (mDst < mDstUpperLimit) {\r
    *mDst++ = (UINT8) (((UINT8) (Data >> 0x10)) & 0xff);\r
  }\r
\r
  if (mDst < mDstUpperLimit) {\r
    *mDst++ = (UINT8) (((UINT8) (Data >> 0x18)) & 0xff);\r
  }\r
}\r
\r
STATIC\r
EFI_STATUS\r
AllocateMemory (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Allocate memory spaces for data structures used in compression process\r
\r
Argements:\r
  VOID\r
\r
Returns:\r
\r
  EFI_SUCCESS           - Memory is allocated successfully\r
  EFI_OUT_OF_RESOURCES  - Allocation fails\r
\r
--*/\r
{\r
  UINT32  Index;\r
\r
  mText = malloc (WNDSIZ * 2 + MAXMATCH);\r
  if (mText == NULL) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
  for (Index = 0; Index < WNDSIZ * 2 + MAXMATCH; Index++) {\r
    mText[Index] = 0;\r
  }\r
\r
  mLevel      = malloc ((WNDSIZ + UINT8_MAX + 1) * sizeof (*mLevel));\r
  mChildCount = malloc ((WNDSIZ + UINT8_MAX + 1) * sizeof (*mChildCount));\r
  mPosition   = malloc ((WNDSIZ + UINT8_MAX + 1) * sizeof (*mPosition));\r
  mParent     = malloc (WNDSIZ * 2 * sizeof (*mParent));\r
  mPrev       = malloc (WNDSIZ * 2 * sizeof (*mPrev));\r
  mNext       = malloc ((MAX_HASH_VAL + 1) * sizeof (*mNext));\r
  if (mLevel == NULL || mChildCount == NULL || mPosition == NULL ||\r
    mParent == NULL || mPrev == NULL || mNext == NULL) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
\r
  mBufSiz     = BLKSIZ;\r
  mBuf        = malloc (mBufSiz);\r
  while (mBuf == NULL) {\r
    mBufSiz = (mBufSiz / 10U) * 9U;\r
    if (mBufSiz < 4 * 1024U) {\r
      return EFI_OUT_OF_RESOURCES;\r
    }\r
\r
    mBuf = malloc (mBufSiz);\r
  }\r
\r
  mBuf[0] = 0;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
VOID\r
FreeMemory (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Called when compression is completed to free memory previously allocated.\r
\r
Arguments: (VOID)\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  if (mText != NULL) {\r
    free (mText);\r
  }\r
\r
  if (mLevel != NULL) {\r
    free (mLevel);\r
  }\r
\r
  if (mChildCount != NULL) {\r
    free (mChildCount);\r
  }\r
\r
  if (mPosition != NULL) {\r
    free (mPosition);\r
  }\r
\r
  if (mParent != NULL) {\r
    free (mParent);\r
  }\r
\r
  if (mPrev != NULL) {\r
    free (mPrev);\r
  }\r
\r
  if (mNext != NULL) {\r
    free (mNext);\r
  }\r
\r
  if (mBuf != NULL) {\r
    free (mBuf);\r
  }\r
\r
  return ;\r
}\r
\r
STATIC\r
VOID\r
InitSlide (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Initialize String Info Log data structures\r
\r
Arguments: (VOID)\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  NODE  Index;\r
\r
  for (Index = WNDSIZ; Index <= WNDSIZ + UINT8_MAX; Index++) {\r
    mLevel[Index]     = 1;\r
    mPosition[Index]  = NIL;  /* sentinel */\r
  }\r
\r
  for (Index = WNDSIZ; Index < WNDSIZ * 2; Index++) {\r
    mParent[Index] = NIL;\r
  }\r
\r
  mAvail = 1;\r
  for (Index = 1; Index < WNDSIZ - 1; Index++) {\r
    mNext[Index] = (NODE) (Index + 1);\r
  }\r
\r
  mNext[WNDSIZ - 1] = NIL;\r
  for (Index = WNDSIZ * 2; Index <= MAX_HASH_VAL; Index++) {\r
    mNext[Index] = NIL;\r
  }\r
}\r
\r
STATIC\r
NODE\r
Child (\r
  IN NODE  NodeQ,\r
  IN UINT8 CharC\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Find child node given the parent node and the edge character\r
\r
Arguments:\r
\r
  NodeQ       - the parent node\r
  CharC       - the edge character\r
\r
Returns:\r
\r
  The child node (NIL if not found)\r
\r
--*/\r
{\r
  NODE  NodeR;\r
\r
  NodeR = mNext[HASH (NodeQ, CharC)];\r
  //\r
  // sentinel\r
  //\r
  mParent[NIL] = NodeQ;\r
  while (mParent[NodeR] != NodeQ) {\r
    NodeR = mNext[NodeR];\r
  }\r
\r
  return NodeR;\r
}\r
\r
STATIC\r
VOID\r
MakeChild (\r
  IN NODE  Parent,\r
  IN UINT8 CharC,\r
  IN NODE  Child\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Create a new child for a given parent node.\r
\r
Arguments:\r
\r
  Parent       - the parent node\r
  CharC   - the edge character\r
  Child       - the child node\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  NODE  Node1;\r
  NODE  Node2;\r
\r
  Node1           = (NODE) HASH (Parent, CharC);\r
  Node2           = mNext[Node1];\r
  mNext[Node1]    = Child;\r
  mNext[Child]    = Node2;\r
  mPrev[Node2]    = Child;\r
  mPrev[Child]    = Node1;\r
  mParent[Child]  = Parent;\r
  mChildCount[Parent]++;\r
}\r
\r
STATIC\r
VOID\r
Split (\r
  NODE Old\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Split a node.\r
\r
Arguments:\r
\r
  Old     - the node to split\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  NODE  New;\r
  NODE  TempNode;\r
\r
  New               = mAvail;\r
  mAvail            = mNext[New];\r
  mChildCount[New]  = 0;\r
  TempNode          = mPrev[Old];\r
  mPrev[New]        = TempNode;\r
  mNext[TempNode]   = New;\r
  TempNode          = mNext[Old];\r
  mNext[New]        = TempNode;\r
  mPrev[TempNode]   = New;\r
  mParent[New]      = mParent[Old];\r
  mLevel[New]       = (UINT8) mMatchLen;\r
  mPosition[New]    = mPos;\r
  MakeChild (New, mText[mMatchPos + mMatchLen], Old);\r
  MakeChild (New, mText[mPos + mMatchLen], mPos);\r
}\r
\r
STATIC\r
VOID\r
InsertNode (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Insert string info for current position into the String Info Log\r
\r
Arguments: (VOID)\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  NODE  NodeQ;\r
  NODE  NodeR;\r
  NODE  Index2;\r
  NODE  NodeT;\r
  UINT8 CharC;\r
  UINT8 *t1;\r
  UINT8 *t2;\r
\r
  if (mMatchLen >= 4) {\r
    //\r
    // We have just got a long match, the target tree\r
    // can be located by MatchPos + 1. Travese the tree\r
    // from bottom up to get to a proper starting point.\r
    // The usage of PERC_FLAG ensures proper node deletion\r
    // in DeleteNode() later.\r
    //\r
    mMatchLen--;\r
    NodeR = (NODE) ((mMatchPos + 1) | WNDSIZ);\r
    NodeQ = mParent[NodeR];\r
    while (NodeQ == NIL) {\r
      NodeR = mNext[NodeR];\r
      NodeQ = mParent[NodeR];\r
    }\r
\r
    while (mLevel[NodeQ] >= mMatchLen) {\r
      NodeR = NodeQ;\r
      NodeQ = mParent[NodeQ];\r
    }\r
\r
    NodeT = NodeQ;\r
    while (mPosition[NodeT] < 0) {\r
      mPosition[NodeT]  = mPos;\r
      NodeT             = mParent[NodeT];\r
    }\r
\r
    if (NodeT < WNDSIZ) {\r
      mPosition[NodeT] = (NODE) (mPos | (UINT32) PERC_FLAG);\r
    }\r
  } else {\r
    //\r
    // Locate the target tree\r
    //\r
    NodeQ = (NODE) (mText[mPos] + WNDSIZ);\r
    CharC = mText[mPos + 1];\r
    NodeR = Child (NodeQ, CharC);\r
    if (NodeR == NIL) {\r
      MakeChild (NodeQ, CharC, mPos);\r
      mMatchLen = 1;\r
      return ;\r
    }\r
\r
    mMatchLen = 2;\r
  }\r
  //\r
  // Traverse down the tree to find a match.\r
  // Update Position value along the route.\r
  // Node split or creation is involved.\r
  //\r
  for (;;) {\r
    if (NodeR >= WNDSIZ) {\r
      Index2    = MAXMATCH;\r
      mMatchPos = NodeR;\r
    } else {\r
      Index2    = mLevel[NodeR];\r
      mMatchPos = (NODE) (mPosition[NodeR] & (UINT32)~PERC_FLAG);\r
    }\r
\r
    if (mMatchPos >= mPos) {\r
      mMatchPos -= WNDSIZ;\r
    }\r
\r
    t1  = &mText[mPos + mMatchLen];\r
    t2  = &mText[mMatchPos + mMatchLen];\r
    while (mMatchLen < Index2) {\r
      if (*t1 != *t2) {\r
        Split (NodeR);\r
        return ;\r
      }\r
\r
      mMatchLen++;\r
      t1++;\r
      t2++;\r
    }\r
\r
    if (mMatchLen >= MAXMATCH) {\r
      break;\r
    }\r
\r
    mPosition[NodeR]  = mPos;\r
    NodeQ             = NodeR;\r
    NodeR             = Child (NodeQ, *t1);\r
    if (NodeR == NIL) {\r
      MakeChild (NodeQ, *t1, mPos);\r
      return ;\r
    }\r
\r
    mMatchLen++;\r
  }\r
\r
  NodeT           = mPrev[NodeR];\r
  mPrev[mPos]     = NodeT;\r
  mNext[NodeT]    = mPos;\r
  NodeT           = mNext[NodeR];\r
  mNext[mPos]     = NodeT;\r
  mPrev[NodeT]    = mPos;\r
  mParent[mPos]   = NodeQ;\r
  mParent[NodeR]  = NIL;\r
\r
  //\r
  // Special usage of 'next'\r
  //\r
  mNext[NodeR] = mPos;\r
\r
}\r
\r
STATIC\r
VOID\r
DeleteNode (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Delete outdated string info. (The Usage of PERC_FLAG\r
  ensures a clean deletion)\r
\r
Arguments: (VOID)\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  NODE  NodeQ;\r
  NODE  NodeR;\r
  NODE  NodeS;\r
  NODE  NodeT;\r
  NODE  NodeU;\r
\r
  if (mParent[mPos] == NIL) {\r
    return ;\r
  }\r
\r
  NodeR         = mPrev[mPos];\r
  NodeS         = mNext[mPos];\r
  mNext[NodeR]  = NodeS;\r
  mPrev[NodeS]  = NodeR;\r
  NodeR         = mParent[mPos];\r
  mParent[mPos] = NIL;\r
  if (NodeR >= WNDSIZ) {\r
    return ;\r
  }\r
\r
  mChildCount[NodeR]--;\r
  if (mChildCount[NodeR] > 1) {\r
    return ;\r
  }\r
\r
  NodeT = (NODE) (mPosition[NodeR] & (UINT32)~PERC_FLAG);\r
  if (NodeT >= mPos) {\r
    NodeT -= WNDSIZ;\r
  }\r
\r
  NodeS = NodeT;\r
  NodeQ = mParent[NodeR];\r
  NodeU = mPosition[NodeQ];\r
  while (NodeU & (UINT32) PERC_FLAG) {\r
    NodeU &= (UINT32)~PERC_FLAG;\r
    if (NodeU >= mPos) {\r
      NodeU -= WNDSIZ;\r
    }\r
\r
    if (NodeU > NodeS) {\r
      NodeS = NodeU;\r
    }\r
\r
    mPosition[NodeQ]  = (NODE) (NodeS | WNDSIZ);\r
    NodeQ             = mParent[NodeQ];\r
    NodeU             = mPosition[NodeQ];\r
  }\r
\r
  if (NodeQ < WNDSIZ) {\r
    if (NodeU >= mPos) {\r
      NodeU -= WNDSIZ;\r
    }\r
\r
    if (NodeU > NodeS) {\r
      NodeS = NodeU;\r
    }\r
\r
    mPosition[NodeQ] = (NODE) (NodeS | WNDSIZ | (UINT32) PERC_FLAG);\r
  }\r
\r
  NodeS           = Child (NodeR, mText[NodeT + mLevel[NodeR]]);\r
  NodeT           = mPrev[NodeS];\r
  NodeU           = mNext[NodeS];\r
  mNext[NodeT]    = NodeU;\r
  mPrev[NodeU]    = NodeT;\r
  NodeT           = mPrev[NodeR];\r
  mNext[NodeT]    = NodeS;\r
  mPrev[NodeS]    = NodeT;\r
  NodeT           = mNext[NodeR];\r
  mPrev[NodeT]    = NodeS;\r
  mNext[NodeS]    = NodeT;\r
  mParent[NodeS]  = mParent[NodeR];\r
  mParent[NodeR]  = NIL;\r
  mNext[NodeR]    = mAvail;\r
  mAvail          = NodeR;\r
}\r
\r
STATIC\r
VOID\r
GetNextMatch (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Advance the current position (read in new data if needed).\r
  Delete outdated string info. Find a match string for current position.\r
\r
Arguments: (VOID)\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  INT32 Number;\r
\r
  mRemainder--;\r
  mPos++;\r
  if (mPos == WNDSIZ * 2) {\r
    memmove (&mText[0], &mText[WNDSIZ], WNDSIZ + MAXMATCH);\r
    Number = FreadCrc (&mText[WNDSIZ + MAXMATCH], WNDSIZ);\r
    mRemainder += Number;\r
    mPos = WNDSIZ;\r
  }\r
\r
  DeleteNode ();\r
  InsertNode ();\r
}\r
\r
STATIC\r
EFI_STATUS\r
Encode (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  The main controlling routine for compression process.\r
\r
Arguments: (VOID)\r
\r
Returns:\r
\r
  EFI_SUCCESS           - The compression is successful\r
  EFI_OUT_0F_RESOURCES  - Not enough memory for compression process\r
\r
--*/\r
{\r
  EFI_STATUS  Status;\r
  INT32       LastMatchLen;\r
  NODE        LastMatchPos;\r
\r
  Status = AllocateMemory ();\r
  if (EFI_ERROR (Status)) {\r
    FreeMemory ();\r
    return Status;\r
  }\r
\r
  InitSlide ();\r
\r
  HufEncodeStart ();\r
\r
  mRemainder  = FreadCrc (&mText[WNDSIZ], WNDSIZ + MAXMATCH);\r
\r
  mMatchLen   = 0;\r
  mPos        = WNDSIZ;\r
  InsertNode ();\r
  if (mMatchLen > mRemainder) {\r
    mMatchLen = mRemainder;\r
  }\r
\r
  while (mRemainder > 0) {\r
    LastMatchLen  = mMatchLen;\r
    LastMatchPos  = mMatchPos;\r
    GetNextMatch ();\r
    if (mMatchLen > mRemainder) {\r
      mMatchLen = mRemainder;\r
    }\r
\r
    if (mMatchLen > LastMatchLen || LastMatchLen < THRESHOLD) {\r
      //\r
      // Not enough benefits are gained by outputting a pointer,\r
      // so just output the original character\r
      //\r
      Output (mText[mPos - 1], 0);\r
\r
    } else {\r
\r
      if (LastMatchLen == THRESHOLD) {\r
        if (((mPos - LastMatchPos - 2) & (WNDSIZ - 1)) > (1U << 11)) {\r
          Output (mText[mPos - 1], 0);\r
          continue;\r
        }\r
      }\r
      //\r
      // Outputting a pointer is beneficial enough, do it.\r
      //\r
      Output (\r
        LastMatchLen + (UINT8_MAX + 1 - THRESHOLD),\r
        (mPos - LastMatchPos - 2) & (WNDSIZ - 1)\r
        );\r
      LastMatchLen--;\r
      while (LastMatchLen > 0) {\r
        GetNextMatch ();\r
        LastMatchLen--;\r
      }\r
\r
      if (mMatchLen > mRemainder) {\r
        mMatchLen = mRemainder;\r
      }\r
    }\r
  }\r
\r
  HufEncodeEnd ();\r
  FreeMemory ();\r
  return EFI_SUCCESS;\r
}\r
\r
STATIC\r
VOID\r
CountTFreq (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Count the frequencies for the Extra Set\r
\r
Arguments: (VOID)\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  INT32 Index;\r
  INT32 Index3;\r
  INT32 Number;\r
  INT32 Count;\r
\r
  for (Index = 0; Index < NT; Index++) {\r
    mTFreq[Index] = 0;\r
  }\r
\r
  Number = NC;\r
  while (Number > 0 && mCLen[Number - 1] == 0) {\r
    Number--;\r
  }\r
\r
  Index = 0;\r
  while (Index < Number) {\r
    Index3 = mCLen[Index++];\r
    if (Index3 == 0) {\r
      Count = 1;\r
      while (Index < Number && mCLen[Index] == 0) {\r
        Index++;\r
        Count++;\r
      }\r
\r
      if (Count <= 2) {\r
        mTFreq[0] = (UINT16) (mTFreq[0] + Count);\r
      } else if (Count <= 18) {\r
        mTFreq[1]++;\r
      } else if (Count == 19) {\r
        mTFreq[0]++;\r
        mTFreq[1]++;\r
      } else {\r
        mTFreq[2]++;\r
      }\r
    } else {\r
      mTFreq[Index3 + 2]++;\r
    }\r
  }\r
}\r
\r
STATIC\r
VOID\r
WritePTLen (\r
  IN INT32 Number,\r
  IN INT32 nbit,\r
  IN INT32 Special\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Outputs the code length array for the Extra Set or the Position Set.\r
\r
Arguments:\r
\r
  Number       - the number of symbols\r
  nbit    - the number of bits needed to represent 'n'\r
  Special - the special symbol that needs to be take care of\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  INT32 Index;\r
  INT32 Index3;\r
\r
  while (Number > 0 && mPTLen[Number - 1] == 0) {\r
    Number--;\r
  }\r
\r
  PutBits (nbit, Number);\r
  Index = 0;\r
  while (Index < Number) {\r
    Index3 = mPTLen[Index++];\r
    if (Index3 <= 6) {\r
      PutBits (3, Index3);\r
    } else {\r
      PutBits (Index3 - 3, (1U << (Index3 - 3)) - 2);\r
    }\r
\r
    if (Index == Special) {\r
      while (Index < 6 && mPTLen[Index] == 0) {\r
        Index++;\r
      }\r
\r
      PutBits (2, (Index - 3) & 3);\r
    }\r
  }\r
}\r
\r
STATIC\r
VOID\r
WriteCLen (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Outputs the code length array for Char&Length Set\r
\r
Arguments: (VOID)\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  INT32 Index;\r
  INT32 Index3;\r
  INT32 Number;\r
  INT32 Count;\r
\r
  Number = NC;\r
  while (Number > 0 && mCLen[Number - 1] == 0) {\r
    Number--;\r
  }\r
\r
  PutBits (CBIT, Number);\r
  Index = 0;\r
  while (Index < Number) {\r
    Index3 = mCLen[Index++];\r
    if (Index3 == 0) {\r
      Count = 1;\r
      while (Index < Number && mCLen[Index] == 0) {\r
        Index++;\r
        Count++;\r
      }\r
\r
      if (Count <= 2) {\r
        for (Index3 = 0; Index3 < Count; Index3++) {\r
          PutBits (mPTLen[0], mPTCode[0]);\r
        }\r
      } else if (Count <= 18) {\r
        PutBits (mPTLen[1], mPTCode[1]);\r
        PutBits (4, Count - 3);\r
      } else if (Count == 19) {\r
        PutBits (mPTLen[0], mPTCode[0]);\r
        PutBits (mPTLen[1], mPTCode[1]);\r
        PutBits (4, 15);\r
      } else {\r
        PutBits (mPTLen[2], mPTCode[2]);\r
        PutBits (CBIT, Count - 20);\r
      }\r
    } else {\r
      PutBits (mPTLen[Index3 + 2], mPTCode[Index3 + 2]);\r
    }\r
  }\r
}\r
\r
STATIC\r
VOID\r
EncodeC (\r
  IN INT32 Value\r
  )\r
{\r
  PutBits (mCLen[Value], mCCode[Value]);\r
}\r
\r
STATIC\r
VOID\r
EncodeP (\r
  IN UINT32 Value\r
  )\r
{\r
  UINT32  Index;\r
  UINT32  NodeQ;\r
\r
  Index = 0;\r
  NodeQ = Value;\r
  while (NodeQ) {\r
    NodeQ >>= 1;\r
    Index++;\r
  }\r
\r
  PutBits (mPTLen[Index], mPTCode[Index]);\r
  if (Index > 1) {\r
    PutBits (Index - 1, Value & (0xFFFFFFFFU >> (32 - Index + 1)));\r
  }\r
}\r
\r
STATIC\r
VOID\r
SendBlock (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Huffman code the block and output it.\r
\r
Arguments:\r
  (VOID)\r
\r
Returns:\r
  (VOID)\r
\r
--*/\r
{\r
  UINT32  Index;\r
  UINT32  Index2;\r
  UINT32  Index3;\r
  UINT32  Flags;\r
  UINT32  Root;\r
  UINT32  Pos;\r
  UINT32  Size;\r
  Flags = 0;\r
\r
  Root  = MakeTree (NC, mCFreq, mCLen, mCCode);\r
  Size  = mCFreq[Root];\r
  PutBits (16, Size);\r
  if (Root >= NC) {\r
    CountTFreq ();\r
    Root = MakeTree (NT, mTFreq, mPTLen, mPTCode);\r
    if (Root >= NT) {\r
      WritePTLen (NT, TBIT, 3);\r
    } else {\r
      PutBits (TBIT, 0);\r
      PutBits (TBIT, Root);\r
    }\r
\r
    WriteCLen ();\r
  } else {\r
    PutBits (TBIT, 0);\r
    PutBits (TBIT, 0);\r
    PutBits (CBIT, 0);\r
    PutBits (CBIT, Root);\r
  }\r
\r
  Root = MakeTree (NP, mPFreq, mPTLen, mPTCode);\r
  if (Root >= NP) {\r
    WritePTLen (NP, PBIT, -1);\r
  } else {\r
    PutBits (PBIT, 0);\r
    PutBits (PBIT, Root);\r
  }\r
\r
  Pos = 0;\r
  for (Index = 0; Index < Size; Index++) {\r
    if (Index % UINT8_BIT == 0) {\r
      Flags = mBuf[Pos++];\r
    } else {\r
      Flags <<= 1;\r
    }\r
\r
    if (Flags & (1U << (UINT8_BIT - 1))) {\r
      EncodeC (mBuf[Pos++] + (1U << UINT8_BIT));\r
      Index3 = mBuf[Pos++];\r
      for (Index2 = 0; Index2 < 3; Index2++) {\r
        Index3 <<= UINT8_BIT;\r
        Index3 += mBuf[Pos++];\r
      }\r
\r
      EncodeP (Index3);\r
    } else {\r
      EncodeC (mBuf[Pos++]);\r
    }\r
  }\r
\r
  for (Index = 0; Index < NC; Index++) {\r
    mCFreq[Index] = 0;\r
  }\r
\r
  for (Index = 0; Index < NP; Index++) {\r
    mPFreq[Index] = 0;\r
  }\r
}\r
\r
STATIC\r
VOID\r
Output (\r
  IN UINT32 CharC,\r
  IN UINT32 Pos\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Outputs an Original Character or a Pointer\r
\r
Arguments:\r
\r
  CharC     - The original character or the 'String Length' element of a Pointer\r
  Pos     - The 'Position' field of a Pointer\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  STATIC UINT32 CPos;\r
\r
  if ((mOutputMask >>= 1) == 0) {\r
    mOutputMask = 1U << (UINT8_BIT - 1);\r
    //\r
    // Check the buffer overflow per outputing UINT8_BIT symbols\r
    // which is an Original Character or a Pointer. The biggest\r
    // symbol is a Pointer which occupies 5 bytes.\r
    //\r
    if (mOutputPos >= mBufSiz - 5 * UINT8_BIT) {\r
      SendBlock ();\r
      mOutputPos = 0;\r
    }\r
\r
    CPos        = mOutputPos++;\r
    mBuf[CPos]  = 0;\r
  }\r
\r
  mBuf[mOutputPos++] = (UINT8) CharC;\r
  mCFreq[CharC]++;\r
  if (CharC >= (1U << UINT8_BIT)) {\r
    mBuf[CPos] |= mOutputMask;\r
    mBuf[mOutputPos++]  = (UINT8) (Pos >> 24);\r
    mBuf[mOutputPos++]  = (UINT8) (Pos >> 16);\r
    mBuf[mOutputPos++]  = (UINT8) (Pos >> (UINT8_BIT));\r
    mBuf[mOutputPos++]  = (UINT8) Pos;\r
    CharC               = 0;\r
    while (Pos) {\r
      Pos >>= 1;\r
      CharC++;\r
    }\r
\r
    mPFreq[CharC]++;\r
  }\r
}\r
\r
STATIC\r
VOID\r
HufEncodeStart (\r
  VOID\r
  )\r
{\r
  INT32 Index;\r
\r
  for (Index = 0; Index < NC; Index++) {\r
    mCFreq[Index] = 0;\r
  }\r
\r
  for (Index = 0; Index < NP; Index++) {\r
    mPFreq[Index] = 0;\r
  }\r
\r
  mOutputPos = mOutputMask = 0;\r
  InitPutBits ();\r
  return ;\r
}\r
\r
STATIC\r
VOID\r
HufEncodeEnd (\r
  VOID\r
  )\r
{\r
  SendBlock ();\r
\r
  //\r
  // Flush remaining bits\r
  //\r
  PutBits (UINT8_BIT - 1, 0);\r
\r
  return ;\r
}\r
\r
STATIC\r
VOID\r
MakeCrcTable (\r
  VOID\r
  )\r
{\r
  UINT32  Index;\r
  UINT32  Index2;\r
  UINT32  Temp;\r
\r
  for (Index = 0; Index <= UINT8_MAX; Index++) {\r
    Temp = Index;\r
    for (Index2 = 0; Index2 < UINT8_BIT; Index2++) {\r
      if (Temp & 1) {\r
        Temp = (Temp >> 1) ^ CRCPOLY;\r
      } else {\r
        Temp >>= 1;\r
      }\r
    }\r
\r
    mCrcTable[Index] = (UINT16) Temp;\r
  }\r
}\r
\r
STATIC\r
VOID\r
PutBits (\r
  IN INT32  Number,\r
  IN UINT32 Value\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Outputs rightmost n bits of x\r
\r
Arguments:\r
\r
  Number   - the rightmost n bits of the data is used\r
  x   - the data\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  UINT8 Temp;\r
\r
  while (Number >= mBitCount) {\r
    //\r
    // Number -= mBitCount should never equal to 32\r
    //\r
    Temp = (UINT8) (mSubBitBuf | (Value >> (Number -= mBitCount)));\r
    if (mDst < mDstUpperLimit) {\r
      *mDst++ = Temp;\r
    }\r
\r
    mCompSize++;\r
    mSubBitBuf  = 0;\r
    mBitCount   = UINT8_BIT;\r
  }\r
\r
  mSubBitBuf |= Value << (mBitCount -= Number);\r
}\r
\r
STATIC\r
INT32\r
FreadCrc (\r
  OUT UINT8 *Pointer,\r
  IN  INT32 Number\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Read in source data\r
\r
Arguments:\r
\r
  Pointer   - the buffer to hold the data\r
  Number   - number of bytes to read\r
\r
Returns:\r
\r
  number of bytes actually read\r
\r
--*/\r
{\r
  INT32 Index;\r
\r
  for (Index = 0; mSrc < mSrcUpperLimit && Index < Number; Index++) {\r
    *Pointer++ = *mSrc++;\r
  }\r
\r
  Number = Index;\r
\r
  Pointer -= Number;\r
  mOrigSize += Number;\r
  Index--;\r
  while (Index >= 0) {\r
    UPDATE_CRC (*Pointer++);\r
    Index--;\r
  }\r
\r
  return Number;\r
}\r
\r
STATIC\r
VOID\r
InitPutBits (\r
  VOID\r
  )\r
{\r
  mBitCount   = UINT8_BIT;\r
  mSubBitBuf  = 0;\r
}\r
\r
STATIC\r
VOID\r
CountLen (\r
  IN INT32 Index\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Count the number of each code length for a Huffman tree.\r
\r
Arguments:\r
\r
  Index   - the top node\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  STATIC INT32  Depth = 0;\r
\r
  if (Index < mN) {\r
    mLenCnt[(Depth < 16) ? Depth : 16]++;\r
  } else {\r
    Depth++;\r
    CountLen (mLeft[Index]);\r
    CountLen (mRight[Index]);\r
    Depth--;\r
  }\r
}\r
\r
STATIC\r
VOID\r
MakeLen (\r
  IN INT32 Root\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Create code length array for a Huffman tree\r
\r
Arguments:\r
\r
  Root   - the root of the tree\r
\r
Returns:\r
\r
  VOID\r
\r
--*/\r
{\r
  INT32   Index;\r
  INT32   Index3;\r
  UINT32  Cum;\r
\r
  for (Index = 0; Index <= 16; Index++) {\r
    mLenCnt[Index] = 0;\r
  }\r
\r
  CountLen (Root);\r
\r
  //\r
  // Adjust the length count array so that\r
  // no code will be generated longer than its designated length\r
  //\r
  Cum = 0;\r
  for (Index = 16; Index > 0; Index--) {\r
    Cum += mLenCnt[Index] << (16 - Index);\r
  }\r
\r
  while (Cum != (1U << 16)) {\r
    mLenCnt[16]--;\r
    for (Index = 15; Index > 0; Index--) {\r
      if (mLenCnt[Index] != 0) {\r
        mLenCnt[Index]--;\r
        mLenCnt[Index + 1] += 2;\r
        break;\r
      }\r
    }\r
\r
    Cum--;\r
  }\r
\r
  for (Index = 16; Index > 0; Index--) {\r
    Index3 = mLenCnt[Index];\r
    Index3--;\r
    while (Index3 >= 0) {\r
      mLen[*mSortPtr++] = (UINT8) Index;\r
      Index3--;\r
    }\r
  }\r
}\r
\r
STATIC\r
VOID\r
DownHeap (\r
  IN INT32 Index\r
  )\r
{\r
  INT32 Index2;\r
  INT32 Index3;\r
\r
  //\r
  // priority queue: send Index-th entry down heap\r
  //\r
  Index3  = mHeap[Index];\r
  Index2  = 2 * Index;\r
  while (Index2 <= mHeapSize) {\r
    if (Index2 < mHeapSize && mFreq[mHeap[Index2]] > mFreq[mHeap[Index2 + 1]]) {\r
      Index2++;\r
    }\r
\r
    if (mFreq[Index3] <= mFreq[mHeap[Index2]]) {\r
      break;\r
    }\r
\r
    mHeap[Index]  = mHeap[Index2];\r
    Index         = Index2;\r
    Index2        = 2 * Index;\r
  }\r
\r
  mHeap[Index] = (INT16) Index3;\r
}\r
\r
STATIC\r
VOID\r
MakeCode (\r
  IN  INT32       Number,\r
  IN  UINT8 Len[  ],\r
  OUT UINT16 Code[]\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Assign code to each symbol based on the code length array\r
\r
Arguments:\r
\r
  Number     - number of symbols\r
  Len   - the code length array\r
  Code  - stores codes for each symbol\r
\r
Returns: (VOID)\r
\r
--*/\r
{\r
  INT32   Index;\r
  UINT16  Start[18];\r
\r
  Start[1] = 0;\r
  for (Index = 1; Index <= 16; Index++) {\r
    Start[Index + 1] = (UINT16) ((Start[Index] + mLenCnt[Index]) << 1);\r
  }\r
\r
  for (Index = 0; Index < Number; Index++) {\r
    Code[Index] = Start[Len[Index]]++;\r
  }\r
}\r
\r
STATIC\r
INT32\r
MakeTree (\r
  IN  INT32            NParm,\r
  IN  UINT16  FreqParm[],\r
  OUT UINT8   LenParm[ ],\r
  OUT UINT16  CodeParm[]\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Generates Huffman codes given a frequency distribution of symbols\r
\r
Arguments:\r
\r
  NParm    - number of symbols\r
  FreqParm - frequency of each symbol\r
  LenParm  - code length for each symbol\r
  CodeParm - code for each symbol\r
\r
Returns:\r
\r
  Root of the Huffman tree.\r
\r
--*/\r
{\r
  INT32 Index;\r
  INT32 Index2;\r
  INT32 Index3;\r
  INT32 Avail;\r
\r
  //\r
  // make tree, calculate len[], return root\r
  //\r
  mN        = NParm;\r
  mFreq     = FreqParm;\r
  mLen      = LenParm;\r
  Avail     = mN;\r
  mHeapSize = 0;\r
  mHeap[1]  = 0;\r
  for (Index = 0; Index < mN; Index++) {\r
    mLen[Index] = 0;\r
    if (mFreq[Index]) {\r
      mHeapSize++;\r
      mHeap[mHeapSize] = (INT16) Index;\r
    }\r
  }\r
\r
  if (mHeapSize < 2) {\r
    CodeParm[mHeap[1]] = 0;\r
    return mHeap[1];\r
  }\r
\r
  for (Index = mHeapSize / 2; Index >= 1; Index--) {\r
    //\r
    // make priority queue\r
    //\r
    DownHeap (Index);\r
  }\r
\r
  mSortPtr = CodeParm;\r
  do {\r
    Index = mHeap[1];\r
    if (Index < mN) {\r
      *mSortPtr++ = (UINT16) Index;\r
    }\r
\r
    mHeap[1] = mHeap[mHeapSize--];\r
    DownHeap (1);\r
    Index2 = mHeap[1];\r
    if (Index2 < mN) {\r
      *mSortPtr++ = (UINT16) Index2;\r
    }\r
\r
    Index3        = Avail++;\r
    mFreq[Index3] = (UINT16) (mFreq[Index] + mFreq[Index2]);\r
    mHeap[1]      = (INT16) Index3;\r
    DownHeap (1);\r
    mLeft[Index3]   = (UINT16) Index;\r
    mRight[Index3]  = (UINT16) Index2;\r
  } while (mHeapSize > 1);\r
\r
  mSortPtr = CodeParm;\r
  MakeLen (Index3);\r
  MakeCode (NParm, LenParm, CodeParm);\r
\r
  //\r
  // return root\r
  //\r
  return Index3;\r
}\r