752d7d239a
Compiler output is identical before & after this step git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/branches/wizou@6036 212acab6-be3b-0410-9dea-997c60f758d6
79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
//---------------------------------------------------------------------------
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// ChunkedFile.h
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//---------------------------------------------------------------------------
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// -=* VPatch *=-
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//---------------------------------------------------------------------------
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// Copyright (C) 2001-2005 Koen van de Sande / Van de Sande Productions
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//---------------------------------------------------------------------------
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// Website: http://www.tibed.net/vpatch
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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// 2. Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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// 3. This notice may not be removed or altered from any source distribution.
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//
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// Reviewed for Unicode support by Jim Park -- 08/29/2007
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#if !defined(ChunkedFile_H)
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#define ChunkedFile_H
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#include "GlobalTypes.h"
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#include "adler32.h"
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#include <iostream>
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#include <algorithm>
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// private data type: the data tree information
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typedef struct TChunkChecksum {
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Checksum::uLong adler32;
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CHECKSUM_BLOCK v;
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} TChunkChecksum;
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inline bool operator<(const TChunkChecksum& a, const TChunkChecksum& b) {
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return (a.adler32 < b.adler32) ? true : (
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(a.adler32 == b.adler32) ? (a.v < b.v) : false
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);
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}
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inline bool operator==(const TChunkChecksum& a, const TChunkChecksum& b) {
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return (a.v == b.v) && (a.adler32 == b.adler32);
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}
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typedef struct FileChunk {
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TFileOffset offset;
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TChunkChecksum checksum;
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} FileChunk;
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inline bool operator<(const FileChunk& a, const FileChunk& b) {
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return a.checksum < b.checksum;
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}
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class ChunkedFile {
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public:
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TFileOffset chunkCount;
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FileChunk* chunks;
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ChunkedFile(bistream& f, TFileOffset fSize, TFileOffset chunkSize);
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~ChunkedFile() {
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if(chunks != NULL) delete[] chunks;
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}
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bool search(TChunkChecksum key, TFileOffset* start);
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inline void calculateChecksum(unsigned char* data, TFileOffset size, TChunkChecksum& K) {
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K.v = *reinterpret_cast<CHECKSUM_BLOCK*>(data);
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K.adler32 = Checksum::adler32(1L,data,size);
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}
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};
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#endif // ChunkedFile_H
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