decompress.h

来自「Next BIOS Source code : Extensible Firmw」· C头文件 代码 · 共 89 行

/*++

Copyright (c)  1999 - 2002 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.


Module Name:

  Decompress.h
  
Abstract:
  Private Data definition for the Decompress driver

--*/

#ifndef _DECOMPRESS_H
#define _DECOMPRESS_H

#include "Efi.h"

//
// Driver Produced Protocol Prototypes
//
#include EFI_PROTOCOL_DEFINITION(Decompress)

//
// Decompression algorithm specific values and data structures
//
#define     BITBUFSIZ         16
#define     WNDBIT            13
#define     WNDSIZ            (1U << WNDBIT)
#define     MAXMATCH          256
#define     THRESHOLD         3
#define     CODE_BIT          16
#define     UINT8_MAX         0xff
#define     BAD_TABLE         -1

//
// C: Char&Len Set; P: Position Set; T: exTra Set
//

#define     NC                (0xff + MAXMATCH + 2 - THRESHOLD)
#define     CBIT              9
#define     NP                (WNDBIT + 1)
#define     NT                (CODE_BIT + 3)
#define     PBIT              4
#define     TBIT              5
#if NT > NP
  #define     NPT               NT
#else
  #define     NPT               NP
#endif

typedef struct {
  UINT8       *mSrcBase;      //Starting address of compressed data
  UINT8       *mDstBase;      //Starting address of decompressed data

  UINT16      mBytesRemain;
  UINT16      mBitCount;
  UINT16      mBitBuf;
  UINT16      mSubBitBuf;
  UINT16      mBufSiz;
  UINT16      mBlockSize;
  UINT32      mDataIdx;
  UINT32      mCompSize;
  UINT32      mOrigSize;
  UINT32      mOutBuf;
  UINT32      mInBuf;

  UINT16      mBadTableFlag;

  UINT8       mBuffer[WNDSIZ];
  UINT16      mLeft[2 * NC - 1];
  UINT16      mRight[2 * NC - 1];
  UINT32      mBuf;
  UINT8       mCLen[NC];
  UINT8       mPTLen[NPT];
  UINT16      mCTable[4096];
  UINT16      mPTTable[256];
} SCRATCH_DATA;

#endif