1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
//---------------------------------------------------------------------------
// PatchGenerator.h
//---------------------------------------------------------------------------
// -=* VPatch *=-
//---------------------------------------------------------------------------
// Copyright (C) 2001-2005 Koen van de Sande / Van de Sande Productions
//---------------------------------------------------------------------------
// Website: http://www.tibed.net/vpatch
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
//
// Reviewed for Unicode support by Jim Park -- 08/29/2007
#if !defined(PatchGenerator_H)
#define PatchGenerator_H
#include <iostream>
#include <vector>
#include "GlobalTypes.h"
#include "ChunkedFile.h"
using namespace std;
typedef struct SameBlock {
TFileOffset sourceOffset;
TFileOffset targetOffset;
TFileOffset size;
} SameBlock;
class PatchGenerator {
protected:
bistream& source;
TFileOffset sourceSize;
bistream& target;
TFileOffset targetSize;
bostream& patch;
// cache
unsigned char* targetCData;
TFileOffset targetCDataBaseOffset;
TFileOffset targetCDataSize;
SameBlock* findBlock(ChunkedFile* sourceTree,
TFileOffset targetFileStartOffset);
// SameBlock* findBlock(ChunkedFile* sourceTree, unsigned char* targetData, TFileOffset targetStartOffset);
void improveSameBlockMatch(SameBlock& match, TFileOffset currentBest = 0);
public:
TFileOffset blockSize;
int maxMatches;
bool beVerbose;
// load in the source, target streams
PatchGenerator(bistream& source, TFileOffset sourceSize, bistream& target, TFileOffset targetSize, bostream& patch);
~PatchGenerator();
// construct the actual patch
void execute(vector<SameBlock*>& sameBlocks);
};
#endif // PatchGenerator_H
|
