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//
// Rstreambuf.h: Rcpp R/C++ interface class library -- stream buffer
//
// Copyright (C) 2011 - 2020 Dirk Eddelbuettel, Romain Francois and Jelmer Ypma
// Copyright (C) 2021 - 2023 Dirk Eddelbuettel, Romain Francois, Jelmer Ypma and Iñaki Ucar
//
// 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 = traits_type::eof());
virtual int sync();
};
template <bool OUTPUT>
class Rostream : public std::ostream {
typedef Rstreambuf<OUTPUT> Buffer;
Buffer buf;
public:
Rostream() : std::ostream( &buf ) {}
};
// #nocov start
template <> inline std::streamsize Rstreambuf<true>::xsputn(const char *s, std::streamsize num) {
Rprintf("%.*s", static_cast<int>(num), s);
return num;
}
template <> inline std::streamsize Rstreambuf<false>::xsputn(const char *s, std::streamsize num) {
REprintf("%.*s", static_cast<int>(num), s);
return num;
}
template <> inline int Rstreambuf<true>::overflow(int c) {
if (c != traits_type::eof()) {
char_type ch = traits_type::to_char_type(c);
return xsputn(&ch, 1) == 1 ? c : traits_type::eof();
}
return c;
}
template <> inline int Rstreambuf<false>::overflow(int c) {
if (c != traits_type::eof()) {
char_type ch = traits_type::to_char_type(c);
return xsputn(&ch, 1) == 1 ? c : traits_type::eof();
}
return c;
}
template <> inline int Rstreambuf<true>::sync() {
::R_FlushConsole();
return 0;
}
template <> inline int Rstreambuf<false>::sync() {
::R_FlushConsole();
return 0;
} // #nocov end
#ifdef RCPP_USE_GLOBAL_ROSTREAM
extern Rostream<true>& Rcout;
extern Rostream<false>& Rcerr;
#else
static Rostream<true> Rcout;
static Rostream<false> Rcerr;
#endif
}
#endif
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