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Add some function/header comments.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5037 6f19259b-4bc3-4df7-8a09-765794883524
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klu2
2008-04-10 07:13:54 +00:00
parent 7859df05bc
commit ed7752ec44
17 changed files with 339 additions and 433 deletions
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371
IntelFrameworkModulePkg/Library/BaseUefiTianoCustomDecompressLib/BaseUefiTianoCustomDecompressLib.c
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@ -1,5 +1,8 @@
/**@file
UEFI and Custom Decompress Library
The function of UefiTianoDecompress() is interface for this module,
it will do tiano or uefi decompress with different verison parameter.
See EFI specification 1.1 Chapter 17 to get LZ77 compress/decompress.
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
@ -15,25 +18,17 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include <Guid/CustomDecompress.h>
#include "BaseUefiTianoCustomDecompressLibInternals.h"
/**
Shift mBitBuf NumOfBits left. Read in NumOfBits of bits from source.
@param Sd The global scratch data
@param NumOfBits The number of bits to shift and read.
**/
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);
@ -64,29 +59,24 @@ Returns: (VOID)
Sd->mBitBuf |= Sd->mSubBitBuf >> Sd->mBitCount;
}
UINT32
GetBits (
IN SCRATCH_DATA *Sd,
IN UINT16 NumOfBits
)
/*++
Routine Description:
/**
Get NumOfBits of bits out from mBitBuf
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:
@param Sd The global scratch data.
@param NumOfBits The number of bits to pop and read.
Sd - The global scratch data.
NumOfBits - The number of bits to pop and read.
@return The bits that are popped out.
Returns:
The bits that are popped out.
--*/
**/
UINT32
GetBits (
IN SCRATCH_DATA *Sd,
IN UINT16 NumOfBits
)
{
UINT32 OutBits;
@ -97,6 +87,22 @@ Returns:
return OutBits;
}
/**
Creates Huffman Code mapping table according to code length array.
Creates Huffman Code mapping table for Extra Set, Char&Len Set
and Position Set according to code length array.
@param Sd The global scratch data
@param NumOfChar Number of symbols in the symbol set
@param BitLen Code length array
@param TableBits The width of the mapping table
@param Table The table
@retval 0 OK.
@retval BAD_TABLE The table is corrupted.
**/
UINT16
MakeTable (
IN SCRATCH_DATA *Sd,
@ -105,26 +111,6 @@ MakeTable (
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];
@ -235,25 +221,17 @@ Returns:
return 0;
}
/**
Decodes a position value.
@param Sd the global scratch data
@return The position value decoded.
**/
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;
@ -288,6 +266,21 @@ Returns:
return Pos;
}
/**
Reads code lengths for the Extra Set or the Position Set.
Read in the Extra Set or Pointion Set Length Arrary, then
generate the Huffman code mapping for them.
@param Sd The global scratch data.
@param nn Number of symbols.
@param nbit Number of bits needed to represent nn.
@param Special The special symbol that needs to be taken care of.
@retval 0 OK.
@retval BAD_TABLE Table is corrupted.
**/
UINT16
ReadPTLen (
IN SCRATCH_DATA *Sd,
@ -295,25 +288,6 @@ ReadPTLen (
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;
@ -369,23 +343,19 @@ Returns:
return MakeTable (Sd, nn, Sd->mPTLen, 8, Sd->mPTTable);
}
/**
Reads code lengths for Char&Len Set.
Read in and decode the Char&Len Set Code Length Array, then
generate the Huffman Code mapping table for the Char&Len Set.
@param Sd the global scratch data
**/
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;
@ -462,25 +432,22 @@ Returns: (VOID)
return ;
}
/**
Decode a character/length value.
Read one value from mBitBuf, Get one code from mBitBuf. If it is at block boundary, generates
Huffman code mapping table for Extra Set, Code&Len Set and
Position Set.
@param Sd The global scratch data.
@return The value decoded.
**/
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;
@ -527,23 +494,15 @@ Returns:
return Index2;
}
/**
Decode the source data ad put the resulting data into the destination buffer.
@param Sd - The global scratch data
**/
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;
@ -595,6 +554,17 @@ Done:
return ;
}
/**
The internal implementation of *_DECOMPRESS_PROTOCOL.GetInfo().
@param Source The source buffer containing the compressed data.
@param SourceSize The size of source buffer
@param DestinationSize The size of destination buffer.
@param ScratchSize The size of scratch buffer.
@retval RETURN_SUCCESS - The size of destination buffer and the size of scratch buffer are successull retrieved.
@retval RETURN_INVALID_PARAMETER - The source data is corrupted
**/
RETURN_STATUS
EFIAPI
UefiDecompressGetInfo (
@ -603,25 +573,6 @@ UefiDecompressGetInfo (
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;
@ -644,6 +595,17 @@ Returns:
return RETURN_SUCCESS;
}
/**
The internal implementation of *_DECOMPRESS_PROTOCOL.Decompress().
@param Source The source buffer containing the compressed data.
@param Destination The destination buffer to store the decompressed data
@param Scratch The buffer used internally by the decompress routine. This buffer is needed to store intermediate data.
@param Version 1 for UEFI Decompress algoruthm, 2 for Tiano Decompess algorithm
@retval RETURN_SUCCESS Decompression is successfull
@retval RETURN_INVALID_PARAMETER The source data is corrupted
**/
RETURN_STATUS
EFIAPI
UefiTianoDecompress (
@ -652,25 +614,6 @@ UefiTianoDecompress (
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;
@ -743,6 +686,16 @@ Returns:
return RETURN_SUCCESS;
}
/**
The internal implementation of *_DECOMPRESS_PROTOCOL.Decompress().
@param Source - The source buffer containing the compressed data.
@param Destination - The destination buffer to store the decompressed data
@param Scratch - The buffer used internally by the decompress routine. This buffer is needed to store intermediate data.
@retval RETURN_SUCCESS - Decompression is successfull
@retval RETURN_INVALID_PARAMETER - The source data is corrupted
**/
RETURN_STATUS
EFIAPI
UefiDecompress (
@ -750,28 +703,22 @@ UefiDecompress (
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);
}
/**
The internal implementation of Tiano decompress GetInfo.
@param InputSection Buffer containing the input GUIDed section to be processed.
@param OutputBufferSize The size of OutputBuffer.
@param ScratchBufferSize The size of ScratchBuffer.
@param SectionAttribute The attribute of the input guided section.
@retval RETURN_SUCCESS - The size of destination buffer and the size of scratch buffer are successull retrieved.
@retval RETURN_INVALID_PARAMETER - The source data is corrupted
The GUID in InputSection does not match this instance guid.
**/
RETURN_STATUS
EFIAPI
TianoDecompressGetInfo (
@ -780,25 +727,7 @@ TianoDecompressGetInfo (
OUT UINT32 *ScratchBufferSize,
OUT UINT16 *SectionAttribute
)
/*++
Routine Description:
The internal implementation of Tiano decompress GetInfo.
Arguments:
InputSection Buffer containing the input GUIDed section to be processed.
OutputBufferSize The size of OutputBuffer.
ScratchBufferSize The size of ScratchBuffer.
SectionAttribute The attribute of the input guided section.
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
The GUID in InputSection does not match this instance guid.
--*/
{
ASSERT (SectionAttribute != NULL);
@ -827,6 +756,22 @@ Returns:
);
}
/**
The implementation of Tiano Decompress().
@param InputSection Buffer containing the input GUIDed section to be processed.
@param OutputBuffer OutputBuffer to point to the start of the section's contents.
if guided data is not prcessed. Otherwise,
OutputBuffer to contain the output data, which is allocated by the caller.
@param ScratchBuffer A pointer to a caller-allocated buffer for function internal use.
@param AuthenticationStatus A pointer to a caller-allocated UINT32 that indicates the
authentication status of the output buffer.
@retval RETURN_SUCCESS Decompression is successfull
@retval RETURN_INVALID_PARAMETER The source data is corrupted, or
The GUID in InputSection does not match this instance guid.
--*/
RETURN_STATUS
EFIAPI
TianoDecompress (
@ -835,28 +780,6 @@ TianoDecompress (
IN VOID *ScratchBuffer, OPTIONAL
OUT UINT32 *AuthenticationStatus
)
/*++
Routine Description:
The implementation of Tiano Decompress().
Arguments:
InputSection Buffer containing the input GUIDed section to be processed.
OutputBuffer OutputBuffer to point to the start of the section's contents.
if guided data is not prcessed. Otherwise,
OutputBuffer to contain the output data, which is allocated by the caller.
ScratchBuffer A pointer to a caller-allocated buffer for function internal use.
AuthenticationStatus A pointer to a caller-allocated UINT32 that indicates the
authentication status of the output buffer.
Returns:
RETURN_SUCCESS - Decompression is successfull
RETURN_INVALID_PARAMETER - The source data is corrupted, or
The GUID in InputSection does not match this instance guid.
--*/
{
ASSERT (OutputBuffer != NULL);
@ -886,11 +809,11 @@ Returns:
);
}
/**
/**
Register TianoDecompress handler.
@retval RETURN_SUCCESS Register successfully.
@retval RETURN_OUT_OF_RESOURCES No enough memory to store this handler.
@retval RETURN_OUT_OF_RESOURCES No enough memory to store this handler.
**/
EFI_STATUS
EFIAPI