//file_uniter.cpp
//Unites N files into a single file (or separates them back).
//FB - 201011301
#include<iostream>
#include<fstream>
#include<string>
#include<vector>
using namespace std;
class str
{
public:
string s;
unsigned int l;
};
int main(int argc, char *argv[])
{
if(argc > 2)
{
cerr<<"Too many arguments!"<<endl;
exit(1);
}
unsigned char uc;
char c;
if(argc == 2)
{
cout<<"File separator mode!"<<endl;
ifstream infile(argv[1],ios::in|ios::binary);
if(!infile)
{
cerr<<"The file "<<argv[1]<<" could not be opened!"<<endl;
exit(1);
}
string s;
unsigned int l,j;
while(true)
{
//get the file name
getline(infile,s);
if(s.empty())
break;
cout<<"file name:"<<s<<endl;
//get the file length
//read 4 bytes and combine them into one 32 bit u. int value
l=0;
j=1;
for(int k=3;k>=0;--k)
{
infile.get(c);
uc=c;
l+=uc*(j<<(8*k));
}
cout<<"size:"<<l<<endl;
ofstream outfile(s.c_str(),ios::out|ios::binary);
if(!outfile)
{
cerr<<"The file "<<s<<" could not be opened!"<<endl;
exit(1);
}
for(unsigned int i=0;i<l;++i)
{
infile.get(c);//cout<<c;
outfile.put(c);
}
//cout<<endl;
outfile.close();
}
infile.close();
}
else //argc == 1
{
cout<<"File uniter mode!"<<endl;
cout<<"Input the file names! (just Enter to end)"<<endl;
vector<str> f_names; //file names
str st;
while(true)
{
getline(cin,st.s);
if(st.s.empty())
break;
ifstream infile(st.s.c_str(),ios::in|ios::binary);
if(!infile)
{
cerr<<"The file "<<st.s<<" could not be opened!"<<endl;
exit(1);
}
//find out the file length (in bytes)
st.l=0;
while(infile.get(c))
{
++st.l;
}
//cout<<"size:"<<st.l<<endl;
infile.clear(); //clear the EOF flag
infile.seekg(0); //reset get() pointer to beginning
infile.close();
f_names.push_back(st);
}
cout<<"Input the output file name:"<<endl;
string s;
cin>>s;
ofstream outfile(s.c_str(), ios::out|ios::binary);
if(!outfile)
{
cerr<<"The file "<<s<<" could not be opened!"<<endl;
exit(1);
}
//output file format: filename1, filelength1, file1, ...
for(unsigned int i=0;i<f_names.size();++i)
{
outfile.write(f_names.at(i).s.c_str(),f_names.at(i).s.size());
//add a next line char to the end of the file name
c='\n';
uc=c;
outfile.put(uc);
//write the file length
//divide 32 bit u. int values into 4 bytes
outfile.put(static_cast<unsigned char>(f_names.at(i).l>>24));
outfile.put(static_cast<unsigned char>((f_names.at(i).l>>16)%256));
outfile.put(static_cast<unsigned char>((f_names.at(i).l>>8)%256));
outfile.put(static_cast<unsigned char>(f_names.at(i).l%256));
//write the file
ifstream infile(f_names.at(i).s.c_str(),ios::in|ios::binary);
for(unsigned int j=0;j<f_names.at(i).l;++j)
{
infile.get(c);
outfile.put(c);
}
infile.clear(); //clear the EOF flag
infile.seekg(0); //reset get() pointer to beginning
infile.close();
}
}//end else
return 0;
}
