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#include <R.h>
#include <Rdefines.h>
extern int utf8locale;
 
SEXP dfmake(SEXP x, SEXP y, SEXP z){
  int pc=0;
  SEXP df, varlabels, tmp, row_names;//DataTypes;
 
  const char* xx = CHAR(STRING_ELT(x, 0));
  const char* yy = CHAR(STRING_ELT(y, 0));
  const char* zz = CHAR(STRING_ELT(z, 0));
 
  PROTECT(df = allocVector(VECSXP, 2));  pc++;
 
    SET_VECTOR_ELT(df, 0, allocVector(STRSXP, 3));
 
  SET_STRING_ELT(VECTOR_ELT(df,0), 0, mkCharCE(xx, (utf8locale)?CE_UTF8:CE_NATIVE));
  SET_STRING_ELT(VECTOR_ELT(df,0), 1, mkCharCE(yy, (utf8locale)?CE_UTF8:CE_NATIVE));
  SET_STRING_ELT(VECTOR_ELT(df,0), 2, mkCharCE(zz, (utf8locale)?CE_UTF8:CE_NATIVE));
    
    SET_VECTOR_ELT(df, 1, allocVector(INTSXP, 3));
 
  INTEGER(VECTOR_ELT(df,1))[0] = 10;
  INTEGER(VECTOR_ELT(df,1))[1] = 20;
  INTEGER(VECTOR_ELT(df,1))[2] = 30;
 
  PROTECT(varlabels = allocVector(STRSXP, 2));  pc++;
  SET_STRING_ELT(varlabels, 0, mkCharCE("Term", (utf8locale)?CE_UTF8:CE_NATIVE));
  SET_STRING_ELT(varlabels, 1, mkCharCE("Freq", (utf8locale)?CE_UTF8:CE_NATIVE));
    
  PROTECT(tmp = mkString("data.frame"));
  pc++;
 
  PROTECT(row_names = allocVector(STRSXP, 3));
  pc++;
  SET_STRING_ELT(row_names, 0, mkCharCE("1", (utf8locale)?CE_UTF8:CE_NATIVE));
  SET_STRING_ELT(row_names, 1, mkCharCE("2", (utf8locale)?CE_UTF8:CE_NATIVE));
  SET_STRING_ELT(row_names, 2, mkCharCE("3", (utf8locale)?CE_UTF8:CE_NATIVE));
        
  setAttrib(df, R_ClassSymbol, tmp);
  setAttrib(df, R_NamesSymbol, varlabels);
  setAttrib(df, R_RowNamesSymbol, row_names);
 
  UNPROTECT(pc);
  return(df);
 
}

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#include "Rcpp.h"
 
using namespace Rcpp;
 
RcppExport SEXP dfMake2 (SEXP x, SEXP y, SEXP z){
  CharacterVector cv = CharacterVector::create(as<std::string>(x),
                                               as<std::string>(y),
                                               as<std::string>(z));
  IntegerVector nv = IntegerVector::create(10,20,30);
  
  return DataFrame::create(Named("Name") =  cv,  Named ("Age") =  nv,
                           Named("stringsAsFactors") = false );