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diff_demo.cpp
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diff_demo.cpp
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//
// diff_demo.cpp
// HDiff
//
/*
This is the HDiffPatch copyright.
Copyright (c) 2012-2013 HouSisong All Rights Reserved.
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*/
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include "assert.h"
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include "libHDiffPatch/HDiff/diff.h"
#include "libHDiffPatch/HPatch/patch.h"
typedef unsigned char TByte;
typedef size_t TUInt;
typedef ptrdiff_t TInt;
void readFile(std::vector<TByte>& data,const char* fileName){
std::ifstream file(fileName);
file.seekg(0,std::ios::end);
std::streampos file_length=file.tellg();
file.seekg(0,std::ios::beg);
size_t needRead=(size_t)file_length;
if ((file_length<0)||((std::streamsize)needRead!=(std::streamsize)file_length)) {
file.close();
exit(1);
}
data.resize(needRead);
file.read((char*)&data[0], needRead);
std::streamsize readed=file.gcount();
file.close();
if ((std::streamsize)needRead!=readed) exit(1);
}
void writeFile(const std::vector<TByte>& data,const char* fileName){
std::ofstream file(fileName);
file.write((const char*)&data[0], data.size());
file.close();
}
int main(int argc, const char * argv[]){
clock_t time0=clock();
if (argc!=4) {
std::cout<<"diff command line parameter:\n oldFileName newFileName outDiffFileName\n";
return 0;
}
const char* oldFileName=argv[1];
const char* newFileName=argv[2];
const char* outDiffFileName=argv[3];
std::cout<<"old:\"" <<oldFileName<< "\"\nnew:\""<<newFileName<<"\"\nout:\""<<outDiffFileName<<"\"\n";
std::vector<TByte> oldData; readFile(oldData,oldFileName);
std::vector<TByte> newData; readFile(newData,newFileName);
const TUInt oldDataSize=oldData.size();
const TUInt newDataSize=newData.size();
std::vector<TByte> diffData;
diffData.push_back((TByte)newDataSize);
diffData.push_back((TByte)(newDataSize>>8));
diffData.push_back((TByte)(newDataSize>>16));
TUInt kNewDataSize=-1;
if ((newDataSize>>31)==0){
kNewDataSize=4;
diffData.push_back((TByte)(newDataSize>>24));
}else{
kNewDataSize=9;
diffData.push_back(0xFF);
diffData.push_back((TByte)(newDataSize>>24));
const TUInt highSize=((newDataSize>>16)>>16);
diffData.push_back((TByte)highSize);
diffData.push_back((TByte)(highSize>>8));
diffData.push_back((TByte)(highSize>>16));
diffData.push_back((TByte)(highSize>>24));
}
TByte* newData_begin=0; if (!newData.empty()) newData_begin=&newData[0];
const TByte* oldData_begin=0; if (!oldData.empty()) oldData_begin=&oldData[0];
clock_t time1=clock();
create_diff(newData_begin,newData_begin+newDataSize,oldData_begin, oldData_begin+oldDataSize, diffData);
clock_t time2=clock();
if (!check_diff(newData_begin,newData_begin+newDataSize,oldData_begin,oldData_begin+oldDataSize, &diffData[0]+kNewDataSize, &diffData[0]+diffData.size())){
std::cout<<" patch check diff data error!!!\n";
exit(2);
}else{
std::cout<<" patch check diff data ok!\n";
}
writeFile(diffData,outDiffFileName);
clock_t time3=clock();
std::cout<<" out diff file ok!\n";
std::cout<<"oldDataSize : "<<oldDataSize<<"\nnewDataSize : "<<newDataSize<<"\ndiffDataSize: "<<diffData.size()<<"\n";
std::cout<<"\ndiff time:"<<(time2-time1)*(1000.0/CLOCKS_PER_SEC)<<" ms\n";
std::cout<<"all run time:"<<(time3-time0)*(1000.0/CLOCKS_PER_SEC)<<" ms\n";
return 0;
}