//============================================================================
// Name        : Encoder.cpp
// Author      : Manoj
// Version     :
// Copyright   : Your copyright notice
// Description :
//============================================================================

#include <iostream>
#include <iconv.h>
#include <stdarg.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
using namespace std;

char *character_encoding(char *in_string, char *tocode, char *fromcode)
{
   iconv_t conv_desc;

   conv_desc = iconv_open(tocode, fromcode);
   if (conv_desc == (iconv_t) -1)
   {
      /* Initialization failure. */
      if (errno == EINVAL)
      {
         cout << "Conversion from " << fromcode << "to " << tocode << "is not supported" << endl;
      }
      else
      {
         cout << "Initialization failure: " << strerror(errno) << endl;
      }
      // exit ok
      exit(1);
   }

   size_t from_len = strlen(in_string);
   if (!from_len)
   {
      cout << "Input string is empty " << endl;
      exit(1);
   }
   size_t to_len = 2 * from_len;
   char *out_string = NULL;

   /* Assign enough space to put the converted string */
   out_string = new char[to_len];
   size_t outbytesleft;

   /* Assign enough space to put the converted string */
   char *pIn = in_string;
   char *pOut = out_string;

   if (iconv(conv_desc, &pIn, &from_len, &pOut, &outbytesleft) == (size_t) -1)
   {
      switch (errno)
      {
         case EILSEQ:
         case EINVAL:
         case E2BIG:
            cout << "Error: " << strerror(errno) << endl;
            break;
         default:
            cout << "Error" << endl;
      }
      // exit ok
      exit(1);
   }

   if (out_string)
   {
      return out_string;
   }
   else
   {
      cout << "Final iconv output is NULL " << endl;
   }
   int v;
   v = iconv_close(conv_desc);
   if (v != 0)
   {
      cout << "iconv_close failed: " << strerror(errno) << endl;
      // exit ok
      exit(1);
   }
}

int main(int argc, char** argv)
{
   cout << character_encoding(argv[1], argv[3], argv[2]) <<endl<< strlen((const char *) character_encoding(argv[1], argv[3], argv[2])) << endl;

   return 0;
}