705 lines
20 KiB
C
705 lines
20 KiB
C
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#include <precomp.h>
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//
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// patchlzx.c
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//
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// Author: Tom McGuire (tommcg) 2/97 - 9/97
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//
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// Copyright (C) Microsoft, 1997-1998.
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//
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// MICROSOFT CONFIDENTIAL
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//
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#define LZX_BLOCKSIZE 0x8000 // 32K
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#define LZX_MINWINDOW 0x20000 // 128K
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typedef struct _LZX_OUTPUT_CONTEXT {
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PUCHAR PatchBufferPointer;
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ULONG PatchBufferSize;
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ULONG PatchSize;
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BOOL DiscardOutput;
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} LZX_OUTPUT_CONTEXT, *PLZX_OUTPUT_CONTEXT;
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ULONG
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__fastcall
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LzxWindowSize(
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IN ULONG OldDataSize,
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IN ULONG NewDataSize,
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IN DWORD OptionFlags
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)
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{
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ULONG WindowSize;
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ULONG DataSize;
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DataSize = ROUNDUP2( OldDataSize, LZX_BLOCKSIZE ) + NewDataSize;
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if ( OptionFlags & PATCH_OPTION_USE_LZX_LARGE ) {
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if ( DataSize > LZX_MAXWINDOW_32 ) {
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DataSize = LZX_MAXWINDOW_32;
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}
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}
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else {
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if ( DataSize > LZX_MAXWINDOW_8 ) {
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DataSize = LZX_MAXWINDOW_8;
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}
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}
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for ( WindowSize = LZX_MINWINDOW;
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WindowSize < DataSize;
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WindowSize <<= 1
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);
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return WindowSize;
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}
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ULONG
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__fastcall
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LzxInsertSize(
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IN ULONG OldDataSize,
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IN DWORD OptionFlags
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)
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{
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if ( OptionFlags & PATCH_OPTION_USE_LZX_LARGE ) {
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if ( OldDataSize > LZX_MAXWINDOW_32 ) {
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OldDataSize = LZX_MAXWINDOW_32;
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}
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}
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else {
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if ( OldDataSize > LZX_MAXWINDOW_8 ) {
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OldDataSize = LZX_MAXWINDOW_8;
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}
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}
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return OldDataSize;
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}
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//
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// Following group of functions and exported apis are exclusively for
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// creating patches. If we're only compiling the apply code, ignore
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// this group of functions.
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//
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#ifndef PATCH_APPLY_CODE_ONLY
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ULONG
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WINAPI
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EstimateLzxCompressionMemoryRequirement(
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IN ULONG OldDataSize,
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IN ULONG NewDataSize,
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IN ULONG OptionFlags
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)
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{
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ULONG WindowSize = LzxWindowSize( OldDataSize, NewDataSize, OptionFlags );
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//
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// Currently the LZX engine requires 9 times the size of the window
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// plus a fixed overhead of just under 0x1A0000 bytes (1.7MB).
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//
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return (( WindowSize * 9 ) + 0x1A0000 );
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}
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int
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__stdcall
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MyLzxOutputCallback(
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PVOID CallerContext,
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PUCHAR CompressedData,
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LONG CompressedSize,
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LONG UncompressedSize
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)
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{
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PLZX_OUTPUT_CONTEXT OutputContext = CallerContext;
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UNREFERENCED_PARAMETER( UncompressedSize );
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OutputContext->PatchSize += CompressedSize + sizeof( USHORT );
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if ( ! OutputContext->DiscardOutput ) {
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if ( OutputContext->PatchSize <= OutputContext->PatchBufferSize ) {
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*(UNALIGNED USHORT *)( OutputContext->PatchBufferPointer ) = (USHORT) CompressedSize;
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memcpy( OutputContext->PatchBufferPointer + sizeof( USHORT ), CompressedData, CompressedSize );
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OutputContext->PatchBufferPointer += CompressedSize + sizeof( USHORT );
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}
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}
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return TRUE;
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}
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ULONG
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WINAPI
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CreateRawLzxPatchDataFromBuffers(
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IN PVOID OldDataBuffer,
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IN ULONG OldDataSize,
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IN PVOID NewDataBuffer,
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IN ULONG NewDataSize,
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IN ULONG PatchBufferSize,
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OUT PVOID PatchBuffer,
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OUT ULONG *PatchSize,
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IN ULONG OptionFlags,
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IN PVOID OptionData,
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IN PFNALLOC pfnAlloc,
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IN HANDLE AllocHandle,
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IN PPATCH_PROGRESS_CALLBACK ProgressCallback,
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IN PVOID CallbackContext,
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IN ULONG ProgressInitialValue,
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IN ULONG ProgressMaximumValue
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)
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{
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UP_IMAGE_NT_HEADERS32 NtHeader;
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LZX_OUTPUT_CONTEXT OutputContext;
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PVOID LzxContext;
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ULONG LzxWindow;
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ULONG LzxOptE8;
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LONG LzxStatus;
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PUCHAR BlockPointer;
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ULONG BytesRemaining;
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ULONG OddBytes;
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LONG Estimate;
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BOOL Success;
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ULONG ErrorCode;
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UNREFERENCED_PARAMETER( OptionData );
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ErrorCode = ERROR_INVALID_PARAMETER;
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if ( OptionFlags & ( PATCH_OPTION_USE_LZX_A | PATCH_OPTION_USE_LZX_B )) {
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ErrorCode = ERROR_OUTOFMEMORY;
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OutputContext.DiscardOutput = TRUE;
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LzxWindow = LzxWindowSize( OldDataSize, NewDataSize, OptionFlags );
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Success = LZX_EncodeInit(
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&LzxContext,
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LzxWindow,
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LZX_BLOCKSIZE,
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pfnAlloc,
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AllocHandle,
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MyLzxOutputCallback,
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&OutputContext
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);
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if ( Success ) {
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ULONG ProgressPosition = ProgressInitialValue;
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ErrorCode = ERROR_PATCH_ENCODE_FAILURE;
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BlockPointer = OldDataBuffer;
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BytesRemaining = LzxInsertSize( OldDataSize, OptionFlags );
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OddBytes = BytesRemaining % LZX_BLOCKSIZE;
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#ifdef TRACING
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EncTracingDefineOffsets(
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LzxWindow,
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OddBytes ? (LZX_BLOCKSIZE - OddBytes) : 0,
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OddBytes ? (BytesRemaining + LZX_BLOCKSIZE - OddBytes) : BytesRemaining
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);
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#endif
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if ( OddBytes ) {
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PUCHAR PadBuffer = pfnAlloc( AllocHandle, LZX_BLOCKSIZE );
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if ( PadBuffer == NULL ) {
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ErrorCode = ERROR_OUTOFMEMORY;
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Success = FALSE;
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}
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else {
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memcpy(
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PadBuffer + LZX_BLOCKSIZE - OddBytes,
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BlockPointer,
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OddBytes
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);
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Success = LZX_EncodeInsertDictionary(
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LzxContext,
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PadBuffer,
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LZX_BLOCKSIZE
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);
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if ( Success ) {
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ProgressPosition += OddBytes;
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Success = ProgressCallbackWrapper(
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ProgressCallback,
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CallbackContext,
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ProgressPosition,
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ProgressMaximumValue
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);
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if ( ! Success ) {
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ErrorCode = GetLastError();
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}
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}
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BlockPointer += OddBytes;
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BytesRemaining -= OddBytes;
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}
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}
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while (( BytesRemaining ) && ( Success )) {
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ASSERT(( BytesRemaining % LZX_BLOCKSIZE ) == 0 );
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Success = LZX_EncodeInsertDictionary(
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LzxContext,
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BlockPointer,
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LZX_BLOCKSIZE
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);
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if ( Success ) {
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ProgressPosition += LZX_BLOCKSIZE;
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Success = ProgressCallbackWrapper(
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ProgressCallback,
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CallbackContext,
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ProgressPosition,
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ProgressMaximumValue
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);
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if ( ! Success ) {
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ErrorCode = GetLastError();
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}
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}
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BlockPointer += LZX_BLOCKSIZE;
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BytesRemaining -= LZX_BLOCKSIZE;
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}
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if ( Success ) {
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LZX_EncodeResetState( LzxContext );
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LzxOptE8 = 0;
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NtHeader = GetNtHeader( NewDataBuffer, NewDataSize );
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//
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// If file has MZ signature AND it's NOT a PE image,
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// OR it's a PE image AND it's an i386 image, turn on
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// the i386-specific E8 call translation optimization.
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//
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if (( OptionFlags & PATCH_OPTION_USE_LZX_B ) &&
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((( NtHeader ) && ( NtHeader->FileHeader.Machine == IMAGE_FILE_MACHINE_I386 )) ||
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(( ! NtHeader ) && ( *(UNALIGNED USHORT *)NewDataBuffer == 0x5A4D )))) {
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LzxOptE8 = NewDataSize;
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}
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OutputContext.PatchBufferSize = PatchBufferSize;
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OutputContext.PatchBufferPointer = PatchBuffer;
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OutputContext.PatchSize = 0;
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OutputContext.DiscardOutput = FALSE;
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BlockPointer = NewDataBuffer;
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BytesRemaining = NewDataSize;
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LzxStatus = ENCODER_SUCCESS;
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Success = TRUE;
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while (( BytesRemaining >= LZX_BLOCKSIZE ) && ( LzxStatus == ENCODER_SUCCESS ) && ( Success )) {
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LzxStatus = LZX_Encode(
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LzxContext,
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BlockPointer,
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LZX_BLOCKSIZE,
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&Estimate,
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LzxOptE8
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);
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if ( LzxStatus == ENCODER_SUCCESS ) {
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ProgressPosition += LZX_BLOCKSIZE;
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Success = ProgressCallbackWrapper(
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ProgressCallback,
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CallbackContext,
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ProgressPosition,
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ProgressMaximumValue
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);
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if ( ! Success ) {
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ErrorCode = GetLastError();
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}
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}
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BlockPointer += LZX_BLOCKSIZE;
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BytesRemaining -= LZX_BLOCKSIZE;
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}
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if (( BytesRemaining ) && ( LzxStatus == ENCODER_SUCCESS ) && ( Success )) {
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LzxStatus = LZX_Encode(
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LzxContext,
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BlockPointer,
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BytesRemaining,
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&Estimate,
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LzxOptE8
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);
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if ( LzxStatus == ENCODER_SUCCESS ) {
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ProgressPosition += BytesRemaining;
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Success = ProgressCallbackWrapper(
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ProgressCallback,
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CallbackContext,
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ProgressPosition,
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ProgressMaximumValue
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);
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if ( ! Success ) {
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ErrorCode = GetLastError();
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}
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}
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}
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if (( LzxStatus == ENCODER_SUCCESS ) && ( Success )) {
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Success = LZX_EncodeFlush( LzxContext );
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if ( Success ) {
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ErrorCode = ERROR_INSUFFICIENT_BUFFER;
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*PatchSize = OutputContext.PatchSize;
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if ( OutputContext.PatchSize <= OutputContext.PatchBufferSize ) {
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ErrorCode = NO_ERROR;
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}
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}
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}
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}
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}
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}
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return ErrorCode;
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}
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ULONG
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WINAPI
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RawLzxCompressBuffer(
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IN PVOID InDataBuffer,
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IN ULONG InDataSize,
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IN ULONG OutDataBufferSize,
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OUT PVOID OutDataBuffer OPTIONAL,
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OUT PULONG OutDataSize,
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IN PFNALLOC pfnAlloc,
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IN HANDLE AllocHandle,
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IN PPATCH_PROGRESS_CALLBACK ProgressCallback,
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IN PVOID CallbackContext,
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IN ULONG ProgressInitialValue,
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IN ULONG ProgressMaximumValue
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)
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{
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UP_IMAGE_NT_HEADERS32 NtHeader;
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LZX_OUTPUT_CONTEXT OutputContext;
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ULONG ProgressPosition;
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PVOID LzxContext;
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ULONG LzxWindow;
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ULONG LzxOptE8;
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LONG LzxStatus;
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PUCHAR BlockPointer;
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ULONG BytesRemaining;
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LONG Estimate;
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BOOL Success;
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ULONG ErrorCode;
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if ( OutDataBufferSize == 0 ) {
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OutDataBuffer = NULL;
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}
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else if ( OutDataBuffer == NULL ) {
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OutDataBufferSize = 0;
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}
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ErrorCode = ERROR_OUTOFMEMORY;
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OutputContext.DiscardOutput = OutDataBuffer ? FALSE : TRUE;
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OutputContext.PatchBufferSize = OutDataBufferSize;
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OutputContext.PatchBufferPointer = OutDataBuffer;
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OutputContext.PatchSize = 0;
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LzxWindow = LzxWindowSize( 0, InDataSize, 0 );
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Success = LZX_EncodeInit(
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&LzxContext,
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LzxWindow,
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LZX_BLOCKSIZE,
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pfnAlloc,
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AllocHandle,
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MyLzxOutputCallback,
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&OutputContext
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);
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if ( Success ) {
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LzxOptE8 = 0;
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NtHeader = GetNtHeader( InDataBuffer, InDataSize );
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//
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// If file has MZ signature AND it's NOT a PE image,
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// OR it's a PE image AND it's an i386 image, turn on
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// the i386-specific E8 call translation optimization.
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//
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if ((( NtHeader ) && ( NtHeader->FileHeader.Machine == IMAGE_FILE_MACHINE_I386 )) ||
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(( ! NtHeader ) && ( *(UNALIGNED USHORT *)InDataBuffer == 0x5A4D ))) {
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LzxOptE8 = InDataSize;
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}
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ProgressPosition = ProgressInitialValue;
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ErrorCode = ERROR_PATCH_ENCODE_FAILURE;
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BlockPointer = InDataBuffer;
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BytesRemaining = InDataSize;
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LzxStatus = ENCODER_SUCCESS;
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Success = TRUE;
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while (( BytesRemaining >= LZX_BLOCKSIZE ) && ( LzxStatus == ENCODER_SUCCESS ) && ( Success )) {
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LzxStatus = LZX_Encode(
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LzxContext,
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BlockPointer,
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LZX_BLOCKSIZE,
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&Estimate,
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LzxOptE8
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);
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if ( LzxStatus == ENCODER_SUCCESS ) {
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ProgressPosition += LZX_BLOCKSIZE;
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Success = ProgressCallbackWrapper(
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ProgressCallback,
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CallbackContext,
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ProgressPosition,
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ProgressMaximumValue
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);
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if ( ! Success ) {
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ErrorCode = GetLastError();
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}
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}
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BlockPointer += LZX_BLOCKSIZE;
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BytesRemaining -= LZX_BLOCKSIZE;
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}
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if (( BytesRemaining ) && ( LzxStatus == ENCODER_SUCCESS ) && ( Success )) {
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LzxStatus = LZX_Encode(
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LzxContext,
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BlockPointer,
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BytesRemaining,
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&Estimate,
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LzxOptE8
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);
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if ( LzxStatus == ENCODER_SUCCESS ) {
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ProgressPosition += BytesRemaining;
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Success = ProgressCallbackWrapper(
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ProgressCallback,
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CallbackContext,
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ProgressPosition,
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ProgressMaximumValue
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);
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if ( ! Success ) {
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ErrorCode = GetLastError();
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}
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}
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}
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if (( LzxStatus == ENCODER_SUCCESS ) && ( Success )) {
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Success = LZX_EncodeFlush( LzxContext );
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if ( Success ) {
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if ( OutDataSize ) {
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*OutDataSize = OutputContext.PatchSize;
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}
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if (( OutDataBufferSize ) && ( OutputContext.PatchSize > OutDataBufferSize )) {
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ErrorCode = ERROR_INSUFFICIENT_BUFFER;
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}
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else {
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ErrorCode = NO_ERROR;
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}
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}
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}
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}
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return ErrorCode;
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}
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|
|
#endif // ! PATCH_APPLY_CODE_ONLY
|
|
|
|
|
|
//
|
|
// Following group of functions and exported apis are exclusively for
|
|
// applying patches. If we're only compiling the create code, ignore
|
|
// this group of functions.
|
|
//
|
|
|
|
#ifndef PATCH_CREATE_CODE_ONLY
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|
|
|
|
|
ULONG
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WINAPI
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EstimateLzxDecompressionMemoryRequirement(
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IN ULONG OldDataSize,
|
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IN ULONG NewDataSize,
|
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IN ULONG OptionFlags
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)
|
|
{
|
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ULONG WindowSize = LzxWindowSize( OldDataSize, NewDataSize, OptionFlags );
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|
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//
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// Currently the LZX decompression engine requires the size of the
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// window plus some slop and the size of the context. We'll add 64K
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// to cover the context size and slop.
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//
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return ( WindowSize + 0x10000 );
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}
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ULONG
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WINAPI
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ApplyRawLzxPatchToBuffer(
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IN PVOID OldDataBuffer,
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IN ULONG OldDataSize,
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IN PVOID PatchDataBuffer,
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IN ULONG PatchDataSize,
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OUT PVOID NewDataBuffer,
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IN ULONG NewDataSize,
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IN ULONG OptionFlags,
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IN PVOID OptionData,
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IN PFNALLOC pfnAlloc,
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IN HANDLE AllocHandle,
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IN PPATCH_PROGRESS_CALLBACK ProgressCallback,
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IN PVOID CallbackContext,
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IN ULONG ProgressInitialValue,
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IN ULONG ProgressMaximumValue
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)
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|
{
|
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PVOID LzxContext;
|
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ULONG LzxWindow;
|
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BOOL Success;
|
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ULONG ErrorCode;
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|
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UNREFERENCED_PARAMETER( OptionData );
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|
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ErrorCode = ERROR_INVALID_PARAMETER;
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|
|
if ( OptionFlags & ( PATCH_OPTION_USE_LZX_A | PATCH_OPTION_USE_LZX_B )) {
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|
|
ErrorCode = ERROR_OUTOFMEMORY;
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|
|
LzxWindow = LzxWindowSize( OldDataSize, NewDataSize, OptionFlags );
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|
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Success = LZX_DecodeInit(
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&LzxContext,
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LzxWindow,
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pfnAlloc,
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AllocHandle
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|
);
|
|
|
|
if ( Success ) {
|
|
|
|
ErrorCode = ERROR_PATCH_DECODE_FAILURE;
|
|
|
|
Success = LZX_DecodeInsertDictionary(
|
|
LzxContext,
|
|
OldDataBuffer,
|
|
LzxInsertSize( OldDataSize, OptionFlags )
|
|
);
|
|
|
|
if ( Success ) {
|
|
|
|
PUCHAR CompressedInputPointer = PatchDataBuffer;
|
|
PUCHAR CompressedInputExtent = CompressedInputPointer + PatchDataSize;
|
|
PUCHAR UncompressedOutputPointer = NewDataBuffer;
|
|
ULONG UncompressedBytesRemaining = NewDataSize;
|
|
ULONG ProgressPosition = ProgressInitialValue;
|
|
LONG LzxStatus = 0;
|
|
LONG ActualSize;
|
|
ULONG UncompressedBlockSize;
|
|
ULONG CompressedBlockSize;
|
|
|
|
while (( UncompressedBytesRemaining ) && ( LzxStatus == 0 )) {
|
|
|
|
UncompressedBlockSize = ( UncompressedBytesRemaining > LZX_BLOCKSIZE ) ? LZX_BLOCKSIZE : UncompressedBytesRemaining;
|
|
|
|
CompressedBlockSize = *(UNALIGNED USHORT *)( CompressedInputPointer );
|
|
|
|
CompressedInputPointer += sizeof( USHORT );
|
|
|
|
if (( CompressedInputPointer + CompressedBlockSize ) > CompressedInputExtent ) {
|
|
LzxStatus = 1;
|
|
break;
|
|
}
|
|
|
|
LzxStatus = LZX_Decode(
|
|
LzxContext,
|
|
UncompressedBlockSize,
|
|
CompressedInputPointer,
|
|
CompressedBlockSize,
|
|
UncompressedOutputPointer,
|
|
UncompressedBlockSize,
|
|
&ActualSize
|
|
);
|
|
|
|
CompressedInputPointer += CompressedBlockSize;
|
|
UncompressedOutputPointer += ActualSize;
|
|
UncompressedBytesRemaining -= ActualSize;
|
|
ProgressPosition += ActualSize;
|
|
|
|
Success = ProgressCallbackWrapper(
|
|
ProgressCallback,
|
|
CallbackContext,
|
|
ProgressPosition,
|
|
ProgressMaximumValue
|
|
);
|
|
|
|
if ( ! Success ) {
|
|
ErrorCode = GetLastError();
|
|
LzxStatus = 1;
|
|
}
|
|
}
|
|
|
|
if ( LzxStatus == 0 ) {
|
|
ErrorCode = NO_ERROR;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return ErrorCode;
|
|
}
|
|
|
|
#endif // ! PATCH_CREATE_CODE_ONLY
|
|
|
|
|
|
|
|
|