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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
//
// Rstreambuf.h: Rcpp R/C++ interface class library -- stream buffer
//
// Copyright (C) 2011 - 2017 Dirk Eddelbuettel, Romain Francois and Jelmer Ypma
//
// This file is part of Rcpp.
//
// Rcpp is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Rcpp is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
#ifndef RCPP__IOSTREAM__RSTREAMBUF_H
#define RCPP__IOSTREAM__RSTREAMBUF_H
#include <cstdio>
#include <streambuf>
namespace Rcpp {
template <bool OUTPUT>
class Rstreambuf : public std::streambuf {
public:
Rstreambuf(){}
protected:
virtual std::streamsize xsputn(const char *s, std::streamsize n );
virtual int overflow(int c = EOF );
virtual int sync() ;
};
template <bool OUTPUT>
class Rostream : public std::ostream {
typedef Rstreambuf<OUTPUT> Buffer ;
Buffer* buf ;
public:
Rostream() :
std::ostream( new Buffer ),
buf( static_cast<Buffer*>( rdbuf() ) )
{}
~Rostream() {
if (buf != NULL) {
delete buf;
buf = NULL;
}
}
};
// #nocov start
template <> inline std::streamsize Rstreambuf<true>::xsputn(const char *s, std::streamsize num ) {
Rprintf( "%.*s", num, s ) ;
return num ;
}
template <> inline std::streamsize Rstreambuf<false>::xsputn(const char *s, std::streamsize num ) {
REprintf( "%.*s", num, s ) ;
return num ;
}
template <> inline int Rstreambuf<true>::overflow(int c ) {
if (c != EOF) Rprintf( "%.1s", &c ) ;
return c ;
}
template <> inline int Rstreambuf<false>::overflow(int c ) {
if (c != EOF) REprintf( "%.1s", &c ) ;
return c ;
}
template <> inline int Rstreambuf<true>::sync(){
::R_FlushConsole() ;
return 0 ;
}
template <> inline int Rstreambuf<false>::sync(){
::R_FlushConsole() ;
return 0 ;
} // #nocov end
static Rostream<true> Rcout;
static Rostream<false> Rcerr;
}
#endif
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