blob: 58ea0b112c5a48413b89d6755214bc7921d35723 [file] [log] [blame]
/*++
Copyright (c) 2004, 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:
Decompress.c
Abstract:
Decompressor. Algorithm Ported from OPSD code (Decomp.asm)
--*/
#include <stdio.h>
#include "efihack.h"
EFI_STATUS
EFIAPI
EfiGetInfo (
IN VOID *Source,
IN UINT32 SrcSize,
OUT UINT32 *DstSize,
OUT UINT32 *ScratchSize
);
EFI_STATUS
EFIAPI
EfiDecompress (
IN VOID *Source,
IN UINT32 SrcSize,
IN OUT VOID *Destination,
IN UINT32 DstSize,
IN OUT VOID *Scratch,
IN UINT32 ScratchSize
);
EFI_STATUS
EFIAPI
TianoGetInfo (
IN VOID *Source,
IN UINT32 SrcSize,
OUT UINT32 *DstSize,
OUT UINT32 *ScratchSize
);
EFI_STATUS
EFIAPI
TianoDecompress (
IN VOID *Source,
IN UINT32 SrcSize,
IN OUT VOID *Destination,
IN UINT32 DstSize,
IN OUT VOID *Scratch,
IN UINT32 ScratchSize
);
//
// Decompression algorithm begins here
//
#define BITBUFSIZ 32
#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 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;
STATIC
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;
}
STATIC
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;
}
STATIC
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;
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));
}
for (; Index <= 16; Index++) {
Weight[Index] = (UINT16) (1U << (16 - 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;
}
STATIC
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;
}
STATIC
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;
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);
}
STATIC
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;
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 ;
}
STATIC
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); // there be segfaulting dragons
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;
}
STATIC
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 ;
}
EFI_STATUS
GetInfo (
IN VOID *Source,
IN UINT32 SrcSize,
OUT UINT32 *DstSize,
OUT UINT32 *ScratchSize
)
/*++
Routine Description:
The internal implementation of *_DECOMPRESS_PROTOCOL.GetInfo().
Arguments:
Source - The source buffer containing the compressed data.
SrcSize - The size of source buffer
DstSize - The size of destination buffer.
ScratchSize - The size of scratch buffer.
Returns:
EFI_SUCCESS - The size of destination buffer and the size of scratch buffer are successull retrieved.
EFI_INVALID_PARAMETER - The source data is corrupted
--*/
{
UINT8 *Src;
*ScratchSize = sizeof (SCRATCH_DATA);
Src = Source;
if (SrcSize < 8) {
return EFI_INVALID_PARAMETER;
}
*DstSize = Src[4] + (Src[5] << 8) + (Src[6] << 16) + (Src[7] << 24);
return EFI_SUCCESS;
}
EFI_STATUS
Decompress (
IN VOID *Source,
IN UINT32 SrcSize,
IN OUT VOID *Destination,
IN UINT32 DstSize,
IN OUT VOID *Scratch,
IN UINT32 ScratchSize,
IN UINT8 Version
)
/*++
Routine Description:
The internal implementation of *_DECOMPRESS_PROTOCOL.Decompress().
Arguments:
Source - The source buffer containing the compressed data.
SrcSize - The size of source buffer
Destination - The destination buffer to store the decompressed data
DstSize - The size of destination buffer.
Scratch - The buffer used internally by the decompress routine. This buffer is needed to store intermediate data.
ScratchSize - The size of scratch buffer.
Version - The version of de/compression algorithm.
Version 1 for EFI 1.1 de/compression algorithm.
Version 2 for Tiano de/compression algorithm.
Returns:
EFI_SUCCESS - Decompression is successfull
EFI_INVALID_PARAMETER - The source data is corrupted
--*/
{
UINT32 Index;
UINT32 CompSize;
UINT32 OrigSize;
EFI_STATUS Status;
SCRATCH_DATA *Sd;
UINT8 *Src;
UINT8 *Dst;
Status = EFI_SUCCESS;
Src = Source;
Dst = Destination;
if (ScratchSize < sizeof (SCRATCH_DATA)) {
fprintf(stderr, "ScratchSize\n");
return EFI_INVALID_PARAMETER;
}
Sd = (SCRATCH_DATA *) Scratch;
if (SrcSize < 8) {
fprintf(stderr, "SrcSize < 8\n");
return EFI_INVALID_PARAMETER;
}
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 Status;
}
if (SrcSize < CompSize + 8) {
fprintf(stderr, "SrcSize < CompSize + 8\n");
return EFI_INVALID_PARAMETER;
}
if (DstSize != OrigSize) {
fprintf(stderr, "DstSize != OrigSize\n");
return EFI_INVALID_PARAMETER;
}
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:
//
// Currently, only have 2 versions
//
fprintf(stderr, "wrong Version\n");
return EFI_INVALID_PARAMETER;
}
Sd->mSrcBase = 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
//
fprintf(stderr, "Sd->mBadTableFlag != 0\n");
Status = EFI_INVALID_PARAMETER;
}
return Status;
}
EFI_STATUS
EFIAPI
EfiGetInfo (
IN VOID *Source,
IN UINT32 SrcSize,
OUT UINT32 *DstSize,
OUT UINT32 *ScratchSize
)
/*++
Routine Description:
The implementation of EFI_DECOMPRESS_PROTOCOL.GetInfo().
Arguments:
This - The protocol instance pointer
Source - The source buffer containing the compressed data.
SrcSize - The size of source buffer
DstSize - The size of destination buffer.
ScratchSize - The size of scratch buffer.
Returns:
EFI_SUCCESS - The size of destination buffer and the size of scratch buffer are successull retrieved.
EFI_INVALID_PARAMETER - The source data is corrupted
--*/
{
return GetInfo (
Source,
SrcSize,
DstSize,
ScratchSize
);
}
EFI_STATUS
EFIAPI
EfiDecompress (
IN VOID *Source,
IN UINT32 SrcSize,
IN OUT VOID *Destination,
IN UINT32 DstSize,
IN OUT VOID *Scratch,
IN UINT32 ScratchSize
)
/*++
Routine Description:
The implementation of EFI_DECOMPRESS_PROTOCOL.Decompress().
Arguments:
This - The protocol instance pointer
Source - The source buffer containing the compressed data.
SrcSize - The size of source buffer
Destination - The destination buffer to store the decompressed data
DstSize - The size of destination buffer.
Scratch - The buffer used internally by the decompress routine. This buffer is needed to store intermediate data.
ScratchSize - The size of scratch buffer.
Returns:
EFI_SUCCESS - Decompression is successfull
EFI_INVALID_PARAMETER - The source data is corrupted
--*/
{
//
// For EFI 1.1 de/compression algorithm, the version is 1.
//
return Decompress (
Source,
SrcSize,
Destination,
DstSize,
Scratch,
ScratchSize,
2 //1
);
}
EFI_STATUS
EFIAPI
TianoGetInfo (
IN VOID *Source,
IN UINT32 SrcSize,
OUT UINT32 *DstSize,
OUT UINT32 *ScratchSize
)
/*++
Routine Description:
The implementation of EFI_TIANO_DECOMPRESS_PROTOCOL.GetInfo().
Arguments:
This - The protocol instance pointer
Source - The source buffer containing the compressed data.
SrcSize - The size of source buffer
DstSize - The size of destination buffer.
ScratchSize - The size of scratch buffer.
Returns:
EFI_SUCCESS - The size of destination buffer and the size of scratch buffer are successull retrieved.
EFI_INVALID_PARAMETER - The source data is corrupted
--*/
{
return GetInfo (
Source,
SrcSize,
DstSize,
ScratchSize
);
}
EFI_STATUS
EFIAPI
TianoDecompress (
IN VOID *Source,
IN UINT32 SrcSize,
IN OUT VOID *Destination,
IN UINT32 DstSize,
IN OUT VOID *Scratch,
IN UINT32 ScratchSize
)
/*++
Routine Description:
The implementation of EFI_TIANO_DECOMPRESS_PROTOCOL.Decompress().
Arguments:
This - The protocol instance pointer
Source - The source buffer containing the compressed data.
SrcSize - The size of source buffer
Destination - The destination buffer to store the decompressed data
DstSize - The size of destination buffer.
Scratch - The buffer used internally by the decompress routine. This buffer is needed to store intermediate data.
ScratchSize - The size of scratch buffer.
Returns:
EFI_SUCCESS - Decompression is successfull
EFI_INVALID_PARAMETER - The source data is corrupted
--*/
{
//
// For Tiano de/compression algorithm, the version is 2.
//
return Decompress (
Source,
SrcSize,
Destination,
DstSize,
Scratch,
ScratchSize,
2
);
}