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