bz_decompress.cpp

Go to the documentation of this file.

/*
 * Decompresses Bz2 data
 *
 * without parameters reads compressed data from standard input and writes decompressed data to standard output
 * with 1 parameter reads compressed data from the file given and writes decompressed data to standard output
 * with 2 parameters reads compressed data from the file in the 1st argument and writes decompressed data to the file in the 2nd argument
 *
 */

#include <xstream/bz.h>

#include <iostream>
#include <fstream>

using namespace std;;
using namespace xstream;;


int main(int argc, char* argv[]){

   const size_t len = 4*1024;
   char buf[len];

   istream* readfrom;
   ostream* writeto;

   try{
      /* Binary flags mandtory on win32 systems, otherwise files will be corrupt */
      if(1<argc){
         readfrom = new ifstream(argv[1], ios::binary);
         if(2<argc){
            writeto = new ofstream(argv[2], ios::binary);
         }else{
            writeto = &cout;
         }
      }else{
         readfrom = &cin;
         writeto  = &cout;
      }

      bz::istreambuf bz_i(readfrom->rdbuf());
      istream bzin(&bz_i);

      //raise exceptions
      bzin.exceptions(ios::badbit);

      while(bzin.good()){
         bzin.read(buf,len);
         writeto->write(buf,bzin.gcount());
      }

   }
   catch(exception& e){
      cerr<<"Error: "<<e.what()<<endl;
   }

   writeto->flush();

   //pointers not being freed

   return 0;
}