sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
Files
1c4725675880a0ef3f313b424d706f0f03d7fc3a
system76-edk2/EdkModulePkg/Library/BaseUefiTianoDecompressLib/BaseUefiTianoDecompressLib.c
bbahnsen 878ddf1fc3 Initial import. 
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
2006-04-21 22:54:32 +00:00

888 lines
18 KiB
C
Raw Blame History

/*++
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
BaseUefiTianoDecompressLib.c
Abstract:
UEFI and Tiano Decompress Library
--*/
//
// Decompression algorithm begins here
//
#define BITBUFSIZ 32
#define MAXMATCH 256
#define THRESHOLD 3
#define CODE_BIT 16
#define BAD_TABLE - 1
//
// C: Char&Len Set; P: Position Set; T: exTra Set
//
#define NC (0xff + MAXMATCH + 2 - THRESHOLD)
#define CBIT 9
#define MAXPBIT 5
#define TBIT 5
#define MAXNP ((1U << MAXPBIT) - 1)
#define NT (CODE_BIT + 3)
#if NT > MAXNP
#define NPT NT
#else
#define NPT MAXNP
#endif
typedef struct {
UINT8 *mSrcBase; // Starting address of compressed data
UINT8 *mDstBase; // Starting address of decompressed data
UINT32 mOutBuf;
UINT32 mInBuf;
UINT16 mBitCount;
UINT32 mBitBuf;
UINT32 mSubBitBuf;
UINT16 mBlockSize;
UINT32 mCompSize;
UINT32 mOrigSize;
UINT16 mBadTableFlag;
UINT16 mLeft[2 * NC - 1];
UINT16 mRight[2 * NC - 1];
UINT8 mCLen[NC];
UINT8 mPTLen[NPT];
UINT16 mCTable[4096];
UINT16 mPTTable[256];
//
// The length of the field 'Position Set Code Length Array Size' in Block Header.
// For EFI 1.1 de/compression algorithm, mPBit = 4
// For Tiano de/compression algorithm, mPBit = 5
//
UINT8 mPBit;
} SCRATCH_DATA;
VOID
FillBuf (
IN SCRATCH_DATA *Sd,
IN UINT16 NumOfBits
)
/*++
Routine Description:
Shift mBitBuf NumOfBits left. Read in NumOfBits of bits from source.
Arguments:
Sd - The global scratch data
NumOfBits - The number of bits to shift and read.
Returns: (VOID)
--*/
{
Sd->mBitBuf = (UINT32) (Sd->mBitBuf << NumOfBits);
while (NumOfBits > Sd->mBitCount) {
Sd->mBitBuf |= (UINT32) (Sd->mSubBitBuf << (NumOfBits = (UINT16) (NumOfBits - Sd->mBitCount)));
if (Sd->mCompSize > 0) {
//
// Get 1 byte into SubBitBuf
//
Sd->mCompSize--;
Sd->mSubBitBuf = 0;
Sd->mSubBitBuf = Sd->mSrcBase[Sd->mInBuf++];
Sd->mBitCount = 8;
} else {
//
// No more bits from the source, just pad zero bit.
//
Sd->mSubBitBuf = 0;
Sd->mBitCount = 8;
}
}
Sd->mBitCount = (UINT16) (Sd->mBitCount - NumOfBits);
Sd->mBitBuf |= Sd->mSubBitBuf >> Sd->mBitCount;
}
UINT32
GetBits (
IN SCRATCH_DATA *Sd,
IN UINT16 NumOfBits
)
/*++
Routine Description:
Get NumOfBits of bits out from mBitBuf. Fill mBitBuf with subsequent
NumOfBits of bits from source. Returns NumOfBits of bits that are
popped out.
Arguments:
Sd - The global scratch data.
NumOfBits - The number of bits to pop and read.
Returns:
The bits that are popped out.
--*/
{
UINT32 OutBits;
OutBits = (UINT32) (Sd->mBitBuf >> (BITBUFSIZ - NumOfBits));
FillBuf (Sd, NumOfBits);
return OutBits;
}
UINT16
MakeTable (
IN SCRATCH_DATA *Sd,
IN UINT16 NumOfChar,
IN UINT8 *BitLen,
IN UINT16 TableBits,
OUT UINT16 *Table
)
/*++
Routine Description:
Creates Huffman Code mapping table according to code length array.
Arguments:
Sd - The global scratch data
NumOfChar - Number of symbols in the symbol set
BitLen - Code length array
TableBits - The width of the mapping table
Table - The table
Returns:
0 - OK.
BAD_TABLE - The table is corrupted.
--*/
{
UINT16 Count[17];
UINT16 Weight[17];
UINT16 Start[18];
UINT16 *Pointer;
UINT16 Index3;
volatile UINT16 Index;
UINT16 Len;
UINT16 Char;
UINT16 JuBits;
UINT16 Avail;
UINT16 NextCode;
UINT16 Mask;
for (Index = 1; Index <= 16; Index++) {
Count[Index] = 0;
}
for (Index = 0; Index < NumOfChar; Index++) {
Count[BitLen[Index]]++;
}
Start[1] = 0;
for (Index = 1; Index <= 16; Index++) {
Start[Index + 1] = (UINT16) (Start[Index] + (Count[Index] << (16 - Index)));
}
if (Start[17] != 0) {
/*(1U << 16)*/
return (UINT16) BAD_TABLE;
}
JuBits = (UINT16) (16 - TableBits);
for (Index = 1; Index <= TableBits; Index++) {
Start[Index] >>= JuBits;
Weight[Index] = (UINT16) (1U << (TableBits - Index));
}
while (Index <= 16) {
Weight[Index] = (UINT16) (1U << (16 - Index));
Index++;
}
Index = (UINT16) (Start[TableBits + 1] >> JuBits);
if (Index != 0) {
Index3 = (UINT16) (1U << TableBits);
while (Index != Index3) {
Table[Index++] = 0;
}
}
Avail = NumOfChar;
Mask = (UINT16) (1U << (15 - TableBits));
for (Char = 0; Char < NumOfChar; Char++) {
Len = BitLen[Char];
if (Len == 0) {
continue;
}
NextCode = (UINT16) (Start[Len] + Weight[Len]);
if (Len <= TableBits) {
for (Index = Start[Len]; Index < NextCode; Index++) {
Table[Index] = Char;
}
} else {
Index3 = Start[Len];
Pointer = &Table[Index3 >> JuBits];
Index = (UINT16) (Len - TableBits);
while (Index != 0) {
if (*Pointer == 0) {
Sd->mRight[Avail] = Sd->mLeft[Avail] = 0;
*Pointer = Avail++;
}
if (Index3 & Mask) {
Pointer = &Sd->mRight[*Pointer];
} else {
Pointer = &Sd->mLeft[*Pointer];
}
Index3 <<= 1;
Index--;
}
*Pointer = Char;
}
Start[Len] = NextCode;
}
//
// Succeeds
//
return 0;
}
UINT32
DecodeP (
IN SCRATCH_DATA *Sd
)
/*++
Routine Description:
Decodes a position value.
Arguments:
Sd - the global scratch data
Returns:
The position value decoded.
--*/
{
UINT16 Val;
UINT32 Mask;
UINT32 Pos;
Val = Sd->mPTTable[Sd->mBitBuf >> (BITBUFSIZ - 8)];
if (Val >= MAXNP) {
Mask = 1U << (BITBUFSIZ - 1 - 8);
do {
if (Sd->mBitBuf & Mask) {
Val = Sd->mRight[Val];
} else {
Val = Sd->mLeft[Val];
}
Mask >>= 1;
} while (Val >= MAXNP);
}
//
// Advance what we have read
//
FillBuf (Sd, Sd->mPTLen[Val]);
Pos = Val;
if (Val > 1) {
Pos = (UINT32) ((1U << (Val - 1)) + GetBits (Sd, (UINT16) (Val - 1)));
}
return Pos;
}
UINT16
ReadPTLen (
IN SCRATCH_DATA *Sd,
IN UINT16 nn,
IN UINT16 nbit,
IN UINT16 Special
)
/*++
Routine Description:
Reads code lengths for the Extra Set or the Position Set
Arguments:
Sd - The global scratch data
nn - Number of symbols
nbit - Number of bits needed to represent nn
Special - The special symbol that needs to be taken care of
Returns:
0 - OK.
BAD_TABLE - Table is corrupted.
--*/
{
UINT16 Number;
UINT16 CharC;
volatile UINT16 Index;
UINT32 Mask;
Number = (UINT16) GetBits (Sd, nbit);
if (Number == 0) {
CharC = (UINT16) GetBits (Sd, nbit);
for (Index = 0; Index < 256; Index++) {
Sd->mPTTable[Index] = CharC;
}
for (Index = 0; Index < nn; Index++) {
Sd->mPTLen[Index] = 0;
}
return 0;
}
Index = 0;
while (Index < Number) {
CharC = (UINT16) (Sd->mBitBuf >> (BITBUFSIZ - 3));
if (CharC == 7) {
Mask = 1U << (BITBUFSIZ - 1 - 3);
while (Mask & Sd->mBitBuf) {
Mask >>= 1;
CharC += 1;
}
}
FillBuf (Sd, (UINT16) ((CharC < 7) ? 3 : CharC - 3));
Sd->mPTLen[Index++] = (UINT8) CharC;
if (Index == Special) {
CharC = (UINT16) GetBits (Sd, 2);
while ((INT16) (--CharC) >= 0) {
Sd->mPTLen[Index++] = 0;
}
}
}
while (Index < nn) {
Sd->mPTLen[Index++] = 0;
}
return MakeTable (Sd, nn, Sd->mPTLen, 8, Sd->mPTTable);
}
VOID
ReadCLen (
SCRATCH_DATA *Sd
)
/*++
Routine Description:
Reads code lengths for Char&Len Set.
Arguments:
Sd - the global scratch data
Returns: (VOID)
--*/
{
UINT16 Number;
UINT16 CharC;
volatile UINT16 Index;
UINT32 Mask;
Number = (UINT16) GetBits (Sd, CBIT);
if (Number == 0) {
CharC = (UINT16) GetBits (Sd, CBIT);
for (Index = 0; Index < NC; Index++) {
Sd->mCLen[Index] = 0;
}
for (Index = 0; Index < 4096; Index++) {
Sd->mCTable[Index] = CharC;
}
return ;
}
Index = 0;
while (Index < Number) {
CharC = Sd->mPTTable[Sd->mBitBuf >> (BITBUFSIZ - 8)];
if (CharC >= NT) {
Mask = 1U << (BITBUFSIZ - 1 - 8);
do {
if (Mask & Sd->mBitBuf) {
CharC = Sd->mRight[CharC];
} else {
CharC = Sd->mLeft[CharC];
}
Mask >>= 1;
} while (CharC >= NT);
}
//
// Advance what we have read
//
FillBuf (Sd, Sd->mPTLen[CharC]);
if (CharC <= 2) {
if (CharC == 0) {
CharC = 1;
} else if (CharC == 1) {
CharC = (UINT16) (GetBits (Sd, 4) + 3);
} else if (CharC == 2) {
CharC = (UINT16) (GetBits (Sd, CBIT) + 20);
}
while ((INT16) (--CharC) >= 0) {
Sd->mCLen[Index++] = 0;
}
} else {
Sd->mCLen[Index++] = (UINT8) (CharC - 2);
}
}
while (Index < NC) {
Sd->mCLen[Index++] = 0;
}
MakeTable (Sd, NC, Sd->mCLen, 12, Sd->mCTable);
return ;
}
UINT16
DecodeC (
SCRATCH_DATA *Sd
)
/*++
Routine Description:
Decode a character/length value.
Arguments:
Sd - The global scratch data.
Returns:
The value decoded.
--*/
{
UINT16 Index2;
UINT32 Mask;
if (Sd->mBlockSize == 0) {
//
// Starting a new block
//
Sd->mBlockSize = (UINT16) GetBits (Sd, 16);
Sd->mBadTableFlag = ReadPTLen (Sd, NT, TBIT, 3);
if (Sd->mBadTableFlag != 0) {
return 0;
}
ReadCLen (Sd);
Sd->mBadTableFlag = ReadPTLen (Sd, MAXNP, Sd->mPBit, (UINT16) (-1));
if (Sd->mBadTableFlag != 0) {
return 0;
}
}
Sd->mBlockSize--;
Index2 = Sd->mCTable[Sd->mBitBuf >> (BITBUFSIZ - 12)];
if (Index2 >= NC) {
Mask = 1U << (BITBUFSIZ - 1 - 12);
do {
if (Sd->mBitBuf & Mask) {
Index2 = Sd->mRight[Index2];
} else {
Index2 = Sd->mLeft[Index2];
}
Mask >>= 1;
} while (Index2 >= NC);
}
//
// Advance what we have read
//
FillBuf (Sd, Sd->mCLen[Index2]);
return Index2;
}
VOID
Decode (
SCRATCH_DATA *Sd
)
/*++
Routine Description:
Decode the source data and put the resulting data into the destination buffer.
Arguments:
Sd - The global scratch data
Returns: (VOID)
--*/
{
UINT16 BytesRemain;
UINT32 DataIdx;
UINT16 CharC;
BytesRemain = (UINT16) (-1);
DataIdx = 0;
for (;;) {
CharC = DecodeC (Sd);
if (Sd->mBadTableFlag != 0) {
return ;
}
if (CharC < 256) {
//
// Process an Original character
//
if (Sd->mOutBuf >= Sd->mOrigSize) {
return ;
} else {
Sd->mDstBase[Sd->mOutBuf++] = (UINT8) CharC;
}
} else {
//
// Process a Pointer
//
CharC = (UINT16) (CharC - (UINT8_MAX + 1 - THRESHOLD));
BytesRemain = CharC;
DataIdx = Sd->mOutBuf - DecodeP (Sd) - 1;
BytesRemain--;
while ((INT16) (BytesRemain) >= 0) {
Sd->mDstBase[Sd->mOutBuf++] = Sd->mDstBase[DataIdx++];
if (Sd->mOutBuf >= Sd->mOrigSize) {
return ;
}
BytesRemain--;
}
}
}
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
TianoDecompressGetInfo (
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
TianoDecompress (
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);
}
Reference in New Issue View Git Blame Copy Permalink