b64_decode.cpp

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/*
 * Base64 decode data
 *
 * without parameters reads encoded data from standard input and writes decoded data to standard output
 * with 1 parameter reads encoded data from the file given and writes decoded data to standard output
 * with 2 parameters reads encoded  data from the file in the 1st argument and writes decoded data to the file in the 2nd argument
 *
 */

#include <xstream/base64.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{
      if(1<argc){
         readfrom = new ifstream(argv[1]);
         if(2<argc){
            writeto = new ofstream(argv[2]);
         }else{
            writeto = &cout;
         }
      }else{
         readfrom = &cin;
         writeto  = &cout;
      }

      base64::istreambuf b64sb(readfrom->rdbuf());
      istream b64(&b64sb);
      
      //raise exceptions
      b64.exceptions(ios::badbit);

      while(b64.good()){
         b64.read(buf,len);
         writeto->write(buf,b64.gcount());
      }

      b64.sync();
      writeto->flush();

   }

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


   //pointers not being freed

   return 0;
}