mirror of
https://github.com/glest/glest-source.git
synced 2025-09-26 07:28:59 +02:00
71 lines
1.4 KiB
C++
71 lines
1.4 KiB
C++
// ==============================================================
|
|
// This file is part of Glest Shared Library (www.glest.org)
|
|
//
|
|
// Copyright (C) 2001-2008 Martiño Figueroa
|
|
//
|
|
// You can redistribute this code and/or modify it under
|
|
// the terms of the GNU General Public License as published
|
|
// by the Free Software Foundation; either version 2 of the
|
|
// License, or (at your option) any later version
|
|
// ==============================================================
|
|
|
|
#include "checksum.h"
|
|
|
|
#include <cassert>
|
|
#include <stdexcept>
|
|
|
|
#include "util.h"
|
|
#include "leak_dumper.h"
|
|
|
|
using namespace std;
|
|
|
|
namespace Shared{ namespace Util{
|
|
|
|
// =====================================================
|
|
// class Checksum
|
|
// =====================================================
|
|
|
|
Checksum::Checksum(){
|
|
sum= 0;
|
|
r= 55665;
|
|
c1= 52845;
|
|
c2= 22719;
|
|
}
|
|
|
|
void Checksum::addByte(int8 value){
|
|
int32 cipher= (value ^ (r >> 8));
|
|
|
|
r= (cipher + r) * c1 + c2;
|
|
sum+= cipher;
|
|
}
|
|
|
|
void Checksum::addString(const string &value){
|
|
for(int i= 0; i<value.size(); ++i){
|
|
addByte(value[i]);
|
|
}
|
|
}
|
|
|
|
void Checksum::addFile(const string &path){
|
|
|
|
FILE* file= fopen(path.c_str(), "rb");
|
|
|
|
if(file!=NULL){
|
|
|
|
addString(lastFile(path));
|
|
|
|
while(!feof(file)){
|
|
int8 byte= 0;
|
|
|
|
size_t readBytes = fread(&byte, 1, 1, file);
|
|
addByte(byte);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
throw runtime_error("Can not open file: " + path);
|
|
}
|
|
fclose(file);
|
|
}
|
|
|
|
}}//end namespace
|